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Sample records for patagonia austral provincia

  1. U-Pb zircon constraints on the age of the Cretaceous Mata Amarilla Formation, Southern Patagonia, Argentina: its relationship with the evolution of the Austral Basin Edades U-Pb en circones de la Formación Mata Amarilla (Cretácico, Patagonia Austral, Argentina: su relación con la evoluci��n de la Cuenca Austral

    Directory of Open Access Journals (Sweden)

    Augusto N Varela

    2012-09-01

    Full Text Available Despite the abundant fossil content of the Mata Amarilla Formation (Southern Patagonia, Santa Cruz Province, Argentina, its age has always generated a considerable number of questions and debates. The chronological data provided by invertebrates, dinosaurs, fish, turtles, plesiosaurs and fossil flora are contradictory. In this work, twenty U-Pb spot analyses by laser ablation were carried out on the outer parts of the zoned zircon crystals from a tuff layer of the middle section of the Mata Amarilla Formation, yielding a U-Pb concordia age of 96.23±0.71 Ma, which corresponds to the middle Cenomanian. The deposition of the lower section of the Mata Amarilla Formation marks the onset of the foreland stage of the Austral Basin (also known as Magallanes Basin; this transition is characterized by the west-east shift of the depositional systems, which is consistent with the progradation of the Cretaceous fold-and-thrust belt. Thus, the onset of the foreland stage could have occurred between the upper Albian and lower Cenomanian, as the underlying Piedra Clavada Formation is lower Albian in age. On comparing the data obtained with information from the Última Esperanza Province in Chile, it can be suggested that the initiation of the closure of the Rocas Verdes Marginal Basin occurred simultaneously.A pesar del abundante contenido fosilífero de la Formación Mata Amarilla (Patagonia Austral, Provincia de Santa Cruz, Argentina, siempre se generaron abundantes dudas y debates acerca de cuál es la edad de esta formación. Los datos cronológicos aportados por los invertebrados, los dinosaurios, peces, tortugas, plesiosaurios y flora fósil son dispares. En el presente trabajo se obtuvo una edad U-Pb concordia por la metodología de ablación láser aplicada a 20 puntos de la parte externa de circones zonados provenientes de un nivel tobáceo hallado en la sección media de la Formación Mata Amarilla, lo cual arrojó una edad de 96,23±0,71 Ma, que

  2. Un suelo referible al periodo calido medieval en Patagonia Austral y Tierra del Fuego (Argentina. Aspectos cronologicos y paleoclimaticos

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    Favier Dubois, C. M.

    2002-08-01

    Full Text Available Geoarchaeological work done in Southernmost Patagonia and in the north of Tierra del Fuego, have revealed the recurrent presence of a paedogenesis interval represented by a soil of an A-AC-C profile, with a mollic epipedon, in the upper section of eolian and colluvial deposits of the late Holocene. This soil is today buried in the sites that have been analyzed, while it remains exposed in other areas of the landscape. Radiocarbon dates obtained on materials placed below it (maximum ages and those obtained by OCR (Oxidizable Carbon Ratio in the AC horizon of this soil (minimum ages, indicate the beginning of its development around the year 1000 BP. Its chronology and environmental implications suggest a relationship with the medieval climatic fluctuations called Medieval Warm Period or Medieval Optimum in Europe. This period has correlates detected in Patagonia by dendroclimatic studies.Estudios geoarqueológicos realizados en 5 localidades de Patagonia austral y norte Tierra del Fuego han revelado la recurrente presencia de un suelo de perfil A-AC-C, de epipedon mólico, en depósitos eólicos y coluviales del Holoceno tardío. Este suelo se observa sepultado en los yacimientos arqueológicos analizados, mientras que permanece expuesto en otras posiciones del paisaje. Numerosas edades máximas y mínimas obtenidas por 14C y por la técnica de OCR (Oxidizable Carbon Ratio indican el comienzo de su desarrollo hacia el 1000 AP. Su cronología e implicancias ambientales permiten vincularlo con fluctuaciones climáticas desarrolladas durante el denominado Período Cálido Medieval u Optimo Medieval Europeo, con correlatos detectados en Patagonia a través de estudios dendroclimáticos.

  3. Peronism and political citizenship in the Patagonia: the look of the magazine Argentina Austral (1946-1955)

    OpenAIRE

    Ruffini, Martha

    2015-01-01

    Desde 1929, y durante casi cuarenta años, en la Patagonia circuló la revista Argentina Austral. Esta continuidad fue facilitada por el sello original de la publicación que era propiedad de la empresa ganadera, comercial y naviera más importante del sur argentino: la Sociedad Anónima Importadora y Exportadora de la Patagonia, dirigida por la familia Braun-Menéndez Behety. La revista asumió una postura de demanda de ampliación de los derechos políticos de los habitantes del sur mientras expresa...

  4. Salud y enfermedad en Patagonia Austral, líneas de análisis, problemas y perspectivas

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    Guichón, Ricardo Aníbal

    2005-01-01

    Full Text Available La dispersión de enfermedades durante el proceso de contacto europeo aborigen en Patagonia Austral es un tema complejo en el cual estamos comenzando a trabajar. Partiendo de algunas consideraciones generales sobre el proceso de ocupación humana en la región se analiza la información sobre: ¿Qué tipos de enfermedades actuaron en momentos pre y post contacto europeo aborigen? ¿Cuál es la muestra osteológica humana disponible y que información tiene asociada? ¿Dónde y cómo aparece el registro biológico humano? Asimismo se hace referencia a algunos avances en dos líneas de trabajo: tafonomía de restos humanos a partir del análisis de propiedades óseas intrínsecas y otra sobre Paleoparasitología. En el marco de proyectos de colaboración con arqueólogos, se señalan los trabajos iniciados en dos sitios: el primer asentamiento español en el estrecho de Magallanes (1584 y La Misión Salesiana "La Candelaria" de Río Grande, Tierra del Fuego. El desafió es coordinar esfuerzos entre bioantropólogos, biólogos, paleopatólogos, paleoparasitólogos, médicos, arqueólogos e historiadores.

  5. Superficial deposits in northeast flank of Sierras Australes (Provincia de Buenos Aires, Republica Argentina)

    International Nuclear Information System (INIS)

    Gentile, R.; Fucks, E.; De Francesco, F.

    2004-01-01

    Pleistocene and Holocene superficial deposits, which have been recognized in an area of 1500 km2 in the northeast flank of Sierras Australes, are characterized. In divide they are underlain by silts and siltstone which are called Sediments Pampeanas. There, a lower sequence, consisting mainly of aeolian sediments (loess) with scarce fluvial deposits and diamictons, was recognized. In some places an upper sequence that is product of aeolian and anthropogenic activity, was also recognized. In the valley sequences, the loess deposits can not only be underlain by fluvial sediments but can also overlain them. The more recent fluvial deposits which have eroded loess sequences are of the post conquest age [es

  6. Sedimentología e icnología de la formación río Mayer, cuenca Austral, provincia de Santa Cruz, Argentina

    OpenAIRE

    Richiano, Sebastián

    2012-01-01

    El presente trabajo de tesis doctoral se centró en el estudio sedimentológico e icnológico de las sedimentitas marinas de la Formación Río Mayer, depositada en el Cretácico inferior de la Cuenca Austral. Dicha cuenca se ubica en el extremo suroccidental de la Patagonia abarcando un sector de Sudamérica que incluye el sur de Argentina y Chile, y representa una de las más importantes cuencas productoras de hidrocarburos de Argentina. El área de estudio contempla la región entre los lagos San Ma...

  7. Patagonia

    DEFF Research Database (Denmark)

    O'Rourke, Dara; Strand, Robert

    2017-01-01

    .” Specifically, this case study focuses on Patagonia’s durable water repellent (DWR) problem. DWR is a highly effective chemical treatment used to waterproof jackets (supporting the quality objective) but has by-products that are toxic and persist in the environment (undermining the sustainability objective......This article examines the tensions that arise when Patagonia simultaneously pursues sustainability and quality objectives embedded within its mission statement: “Build the best product, cause no unnecessary harm, use business to inspire and implement solutions to the environmental crisis......). This case explores the challenges Patagonia has faced and presents some creative solutions to them....

  8. Plan de comercialización Heliraid Patagonia

    OpenAIRE

    Mella, Natalia

    2012-01-01

    La Patagonia Argentina Austral, es considerada un icono a nivel mundial, reúne un conjunto de provincias y aspectos naturales únicos en el mundo1. La Cordillera de los Antes, sus paisajes, su geografía, y su historia. Muchos han sido los aventureros que dieron su vida por explorar y conocer esta zona. Y no todos vivieron para contarlo. Tradicionalmente, la Patagonia se caracterizaba por un escaso desarrollo comercial a raíz de los altos costos y su inaccesibilidad geográfica. Hoy, el desarrol...

  9. Distribución del ictioplancton en la Patagonia austral de Chile: potenciales efectos del deshielo de Campos de Hielo Sur Ichthyoplankton distribution in South Patagonia, Chile: potential effects of ice melting from the Southern Ice Field

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    Mauricio F Landaeta

    2011-07-01

    Full Text Available Durante octubre-noviembre de 2009 se realizó un crucero oceanográfico entre 50 y 53°S de Chile austral, en las cercanías del glaciar Campos de Hielo Sur. Las estaciones cercanas al glaciar presentaron baja temperatura (1-3°C y salinidad ( 0,1 ciclos s-1. Los principales taxa del ictioplancton fueron huevos y larvas de sardina fueguina Sprattus fuegensis, pez hacha Maurolicus parvipinnis, Macrouridae y merluza austral Merluccius australis. El desove principal de S. fuegensis (~ 8000 huevos 10 m-2 ocurrió en zonas mezcladas de la plataforma continental adyacente, mientras que el desove de M. parvipinnis ocurrió en canales intermedios asociado a valores intermedios de estabilidad (N~0,06 ciclos s-1. Se observó una nula o baja abundancia de huevos y larvas de peces en las cercanías del glaciar, y la abundancia de huevos de M. parvipinnis estuvo relacionada positivamente con la temperatura y salinidad de la columna de agua y negativamente con la estabilidad de la columna de agua. Además, hubo una relación negativa entre la densidad del agua de mar y el diámetro de los huevos de S. fuegensis. La relación entre deshielo e ictioplancton podría tener consecuencias en el transporte advectivo y mortalidad masiva de huevos y larvas de peces y el acople pelágico-bentónico en la Patagonia austral de Chile. Como el cambio climático global ha incrementado los deshielos de glaciares en latitudes altas, y el aumento del ingreso de aguas de baja temperatura y salinidad podría tener consecuencias en el ictioplancton de la Patagonia chilena.In October-November 2009, an oceanographic survey was carried out between 50 and 53°S off southern Chile, near the Southern Ice Field. The stations near the glacier showed low temperatures (1-3°C and salinity ( 0.1 cycles s-1. Main ichthyoplankton taxa were eggs and larvae of southern sprat Sprattus fuegensis, lightfish Maurolicus parvipinnis, Macrouridae, and southern hake Merluccius australis. The main

  10. Análisis de sistema de conversores fluido-dinámicos de energía renovable para la Patagonia Austral de Argentina

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    Carlos Victor Manuel Labriola

    2014-06-01

    Full Text Available El potencial de energía en mares y océanos se puede clasificar de distintas formas, por ejemplo: * La energía de las mareas ó Mareomotriz * La energía de las corrientes marinas * La energía de las olas ó Undimotriz * La energía térmica oceánica (OTEC. De estas formas de energía oceánica, tres son posibles en la zona Atlántica de nuestra Patagonia Austral, la Mareomotriz, la Undimotriz y la de corrientes marinas. La Energía Mareomotriz se da desde Viedma hasta Tierra del Fuego con amplitudes de mareas de 4m hasta 20m, la Energía de las Olas se da en la costa de Chubut y Santa Cruz con potenciales de 10 a 30kW/m lineal de frente de ola y el aprovechamiento de las corrientes marinas se puede dar en lugares puntuales como ser la desembocadura del río Deseado o la de Río Gallegos. Para estas Fuentes de Energía se está realizando un banco de pruebas de modelos conversores de las mismas a Energía Eléctrica, en la Unidad Académica Caleta Olivia (UACO de la Universidad Nacional de la Patagonia Austral (UNPA. Este banco dispondrá de dos canales de ensayos hidrodinámicos uno para energía de las corrientes marinas y otro para las olas. El primero dispondrá de una bomba de circulación con velocidad de fluido variable entre 0 y 4m/s. El banco para olas tendrá un sistema de batido del agua para producir ondas de amplitud y período variable. Además se están dimensionando dos modelos de conversores de energía oceánica. Uno es una turbina, tipo eólica sumergida y el otro modelo es de tubo electromecánico oscilante como conversor energético de las olas.

  11. Monopolizar la violencia en una frontera colonial. Policías y militares en Patagonia austral (Argentina y Chile, 1870-1922

    Directory of Open Access Journals (Sweden)

    Alberto Harambour R.

    2016-01-01

    Full Text Available Este artículo analiza la monopolización de la violencia en el ciclo inicial de colonización de Patagonia austral para lo cual propone, primero, que la precariedad local de los Estados de Argentina y Chile descansó en la fuerza expansiva de la industria ganadera para la instalación de su sobe- ranía territorial; y segundo, que la clausura de la delimitación fronteriza solo se produjo en el verano de 1922, como resultado de la represión a la insurgencia obrera. A partir de una extensa investigación en fuentes oficiales y empresariales referidas a Santa Cruz, Magallanes y Tierra del Fuego, así como en la prensa local, se investiga y compara la presencia de la fuerza policial y militar en las subdivisiones administrativas del extremo sur; además se examinaron similitudes y diferencias en las estra- tegias de control social.

  12. U-Pb zircon constraints on the age of the Cretaceous Mata Amarilla Formation, Southern Patagonia, Argentina: Its relationship with the evolution of the Austral Basin

    International Nuclear Information System (INIS)

    Varela, Augusto N; Poire, Daniel G; Martin, Thomas; Gerdes, Axel; Goin, Francisco J; Gelfo, Javier N; Hoffmann, Simone

    2012-01-01

    Despite the abundant fossil content of the Mata Amarilla Formation (Southern Patagonia, Santa Cruz Province, Argentina), its age has always generated a considerable number of questions and debates. The chronological data provided by invertebrates, dinosaurs, fish, turtles, plesiosaurs and fossil flora are contradictory. In this work, twenty U-Pb spot analyses by laser ablation were carried out on the outer parts of the zoned zircon crystals from a tuff layer of the middle section of the Mata Amarilla Formation, yielding a U-Pb concordia age of 96.23±0.71 Ma, which corresponds to the middle Cenomanian. The deposition of the lower section of the Mata Amarilla Formation marks the onset of the foreland stage of the Austral Basin (also known as Magallanes Basin); this transition is characterized by the west-east shift of the depositional systems, which is consistent with the progradation of the Cretaceous fold-and-thrust belt. Thus, the onset of the foreland stage could have occurred between the upper Albian and lower Cenomanian, as the underlying Piedra Clavada Formation is lower Albian in age. On comparing the data obtained with information from the Ultima Esperanza Province in Chile, it can be suggested that the initiation of the closure of the Rocas Verdes Marginal Basin occurred simultaneously

  13. Extensión del límite austral de distribución de tres especies de peces óseos tropicales en la costa de la Provincia de Buenos Aires, Argentina

    OpenAIRE

    Milessi, Andres Conrado; Colonello, Jorge H.; Cortés, Federico; Lasta, Carlos Ángel; Waessle, Juan A.; Allega, Lucrecia

    2012-01-01

    Se presentan tres nuevos registros de especies de peces óseos cuya distribución corresponde a aguas tropicales, capturados por buques pesqueros en la costa de la Provincia de Buenos Aires, Argentina (CPBA, 36º-38ºS). Los ejemplares corresponden a las especies: Rachycentrum canadum, Elops saurus y Caulolatilus chrysops. Estos registros amplían significativamente el límite austral de su distribución. La presencia ocasional de estas especies está asociada al transporte de agua subtropical cálida...

  14. Nanofósiles calcáreos paleógenos y biostratigrafía para dos pozos en el este de la Cuenca Austral, Patagonia, Argentina Paleogene calcareous nannofossil biostratigraphy for two boreholes in the eastern Austral Basin, Patagonia, Argentina

    Directory of Open Access Journals (Sweden)

    Juan Pablo Pérez Panera

    2013-01-01

    Full Text Available Calcareous nannofossils from two boreholes (Campo Bola and Sur Río Chico in the subsurface of eastern Austral Basin, Santa Cruz Province, Argentina, allowed the identification of Early to Middle Paleocene, Early to Middle Eocene and Late Eocene to Early Oligocene assemblages. These assemblages match the formations logged in the boreholes Campo Bola, Man Aike and Río Leona respectively, and represent three paleogene sedimentary cycles within the basin. These results permitted the reinterpretation of previous data from an adjacent borehole (Cerro Redondo. The southern boreholes (Cerro Redondo and Sur Río Chico yield an Early to Middle Paleocene calcareous nannofossil assemblage and an almost continuous record of nannofossils from Early Eocene to Early Oligocene. A discontinuity is interpreted by the absence of Late Paleocene assemblages. The northern borehole (Campo Bola yield only late Early Eocene to Early Oligocene assemblages. The data also indicates that the Paleogene beds unconformably overlie Upper Cretaceous strata.El estudio de los nanofósiles calcáreos recuperados en muestras de subsuelo de dos pozos de exploración (Campo Bola y Sur Río Chico en el este de la Cuenca Austral, provincia de Santa Cruz, Argentina, permitió reconocer asociaciones del Paleoceno Temprano a Medio, Eoceno Temprano a Medio y Eoceno Tardío a Oligoceno Temprano. Estas asociaciones son coincidentes con las formaciones atravesadas en los sondeos hechos en Campo Bola, Man Aike y Río Leona, respectivamente, y representan tres ciclos sedimentarios paleógenos dentro de la cuenca. Estos resultados permitieron la reinterpretación de datos previos de un pozo adyacente (Cerro Redondo. Los pozos ubicados al sur (Cerro Redondo y Sur Río Chico contienen asociaciones de nanofósiles calcáreos del Paleoceno Temprano a Medio y un registro prácticamente continuo de nanofósiles del Eoceno Temprano al Oligoceno Temprano. Se interpreta una discontinuidad por ausencia de

  15. Extensión del límite austral de distribución de tres especies de peces óseos tropicales en la costa de la Provincia de Buenos Aires, Argentina Southern extension of three species of tropical bony fishes along the coast of Buenos Aires Province, Argentina

    OpenAIRE

    Andrés C Milessi; Jorge H Colonello; Federico Cortés; Carlos A Lasta; Juan A Waessle; Lucrecia Allega

    2012-01-01

    Se presentan tres nuevos registros de especies de peces óseos cuya distribución corresponde a aguas tropicales, capturados por buques pesqueros en la costa de la Provincia de Buenos Aires, Argentina (CPBA, 36°-38°S). Los ejemplares corresponden a las especies: Rachycentrum canadum, Elops saurus y Caulolatilus chrysops. Estos registros amplían significativamente el límite austral de su distribución. La presencia ocasional de estas especies está asociada al transporte de agua subtropical cálida...

  16. Complex bioclimatic and soil gradients shape leaf trait variation in Embothrium coccineum (Proteaceae among austral forests in Patagonia Gradientes bioclimáticos y edáficos modelan la variación en caracteres foliares de Embothrium coccineum (Proteaceae en los bosques australes de la Patagonia

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    CINTIA P SOUTO

    2009-06-01

    Full Text Available Patterns of trait variation may be adaptive when vary in relation to an environmental gradient. In particular, leaf traits can affect productivity and competitive ability. We identify patterns of leaf size and shape variation with environmental heterogeneity in one of the most widespread tree species within temperate South America: Embothrium coccineum (Proteaceae. We collected leaf specimens and composite soil samples from 35 populations between 38° and 55° S latitude in Patagonia, covering a wide range of mean annual precipitation (MAP and mean annual temperature (MAT. At each location, we measured nine morphological traits, some of which were cross correlated hence we focus on a smaller number of representative traits. We hypothesized that leaf area (LA, dry mass (DM, and specific leaf area (SLA would increase, and that leaf shape (SF would be more elongated, with increasing temperature, precipitation, and soil nutrient availability. We also expected growing season climate to be more closely associated with leaf traits than mean annual metrics. We used bivariate and backward stepwise multiple regressions to analyse the dependence of morphological traits with climatic and edaphic metrics. LA and DM increased with increasing summer rainfall or winter temperature, as hypothesized. Opposite to our hypothesis, LA and DM decreased with increasing summer temperature suggesting that in terms of leaf size, E. coccineum may sense summer conditions largely as an increasing aridity stressful gradient. Surprisingly, SLA increased with increasingly warm or dry summers. SF was related positively to MAT and negatively to MAP, suggesting that under more benign western climate regimes E. coccineum leaves tend to be elongated. Across sites, LA and DM increased with soil organic carbon and available phosphorus, and decreased with soil nitrogen and exchangeable cations. The opposite pattern was observed for SLA. Biologically meaningful climate metrics and soil

  17. Contexto de las políticas agrarias en los proyectos de desarrollo para Patagonia: el "Informe Altimir" en la provincia de Chubut (1970

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    Gonzalo Pérez Álvarez

    2015-12-01

    Full Text Available El “Informe Altimir” es un trabajo solicitado por el Consejo Federal de Inversiones (CFI a un equipo de investigadores dirigido por Oscar Altimir, para ser entregado a la Asesoría de Desarrollo de Chubut en 1970.Su objetivo era planificar las acciones para la instalación del modelo de "polos de desarrollo" así como analizar las políticas a seguir en las otras áreas económicas. A través de una revisión exhaustiva de esta fuente, y de su cruce con otros aportes, mostramos cuáles fueron las políticas agrarias que se impulsaron en Chubut.Se dividió la provincia en regiones, para impulsar un proyecto que buscara asegurar el suministro de alimentos a las áreas urbanas, la provisión de mano de obra para las industrias a instalarse y la concentración de la propiedad en el resto de Chubut.

  18. Extensión del límite austral de distribución de tres especies de peces óseos tropicales en la costa de la Provincia de Buenos Aires, Argentina Southern extension of three species of tropical bony fishes along the coast of Buenos Aires Province, Argentina

    Directory of Open Access Journals (Sweden)

    Andrés C Milessi

    2012-11-01

    Full Text Available Se presentan tres nuevos registros de especies de peces óseos cuya distribución corresponde a aguas tropicales, capturados por buques pesqueros en la costa de la Provincia de Buenos Aires, Argentina (CPBA, 36°-38°S. Los ejemplares corresponden a las especies: Rachycentrum canadum, Elops saurus y Caulolatilus chrysops. Estos registros amplían significativamente el límite austral de su distribución. La presencia ocasional de estas especies está asociada al transporte de agua subtropical cálida proveniente de la plataforma continental brasilera. Esta hipótesis es probada mediante el análisis de imágenes satelitales de temperatura superficial del mar.We document the southern records of three species of tropical bony fishes along the coast of Buenos Aires Province, Argentina (CBAP, 36-38°S. Rachycentrum canadum, Elops saurus and Caulolatilus chrysops were caught by bottom-trawl commercial vessels. Records presented here significantly extend southward their latitudinal distribution from those previously reported. Using sea surface temperature satellite images we show a southward warm circulation event from Brazil as a putative factor to explain the occurrence of these bony fishes in the CBAP.

  19. Oceanography of the Chilean Patagonia

    Science.gov (United States)

    Pantoja, Silvio; Luis Iriarte, José; Daneri, Giovanni

    2011-03-01

    Chilean Patagonia is one of the most extended fjord regions in the world that covers nearly 240,000 km 2 with an extremely complex coastline and topography in one of the least densely populated areas of the country (1-8 inhabitants every 10 km 2). In recent years, the area has been undergoing somewhat intense pressure since several commercial projects in hydroelectricity, tourism, and commercial salmon and mytilid cultures have been developed, or are in progress. Concomitantly, several large research programs have been devised to study the physical, chemical, and biological environment of Patagonia, such as the CIMAR FIORDO, and recently COPAS Sur-Austral based at Universidad de Concepcion, that attempts to close the bridge between oceanographic knowledge and its use by society. In this introductory article we summarize the collection of papers comprising this Special Issue of Continental Shelf Research. These papers deal with aspects of regional oceanography and geology, inorganic and organic geochemistry, ecology of pelagic and benthic organisms, and past changes in productivity.

  20. UVR-induced photoinhibition of summer marine phytoplankton communities from Patagonia

    NARCIS (Netherlands)

    Villafane, Virginia E.; Janknegt, Paul J.; de Graaff, Marco; Visser, Ronald J. W.; de Poll, Willem H. van; Buma, Anita G. J.; Helbling, E. Walter

    During austral summer 2006, experiments were carried out to evaluate the effects of ultraviolet radiation (UVR, 280-400 nm) on carbon fixation of natural phytoplankton assemblages from Patagonia (Argentina). Surface water samples were collected (ca. 100 m offshore) at mid morning using an

  1. TURISMO RURAL Y CREATIVO COMO ALTERNATIVA DE DESARROLLO LOCAL DE UNA ECONOMÍA OBSOLETA: EL CASO DE LA LÍNEA SUR. PROVINCIA DE RÍO NEGRO. PATAGONIA-ARGENTINA

    Directory of Open Access Journals (Sweden)

    María del Carmen González Viaña

    2015-08-01

    Full Text Available Este trabalho tem por objetivo apresentar a aplicação de conceitos teóricos do desenvolvimento turísitico da Linea Sur (provincia de Rio Negro, uma zona rural tradicional na produção pecuária, fortemente castigada pelas mudanças ocorridas na economia global e pela escassa visão estatégica de longo prazo de seus atores, que a tem levado a um estado de prostação, pauperização e de falta de perspectivas. Ao mesmo tempo, trata-se de uma zona que apresenta um rico patrimônio humano, material e cultural, que a faz propicia para o desenvolvimento turísitico. Palavras-chave: Desenvolvimento local. Turismo rural. Turismo criativo.

  2. OSTEOMETRÍA DE VICUGNA VICUGNA MOLINA, 1782 EN EL PLEISTOCENO FINAL DE PATAGONIA MERIDIONAL CHILENA: IMPLICANCIAS PALEOECOLÓGICAS Y BIOGEOGRÁFICAS / Osteometry of Vicugna vicugna Molina, 1782 in the late Pleistocene of southern chilean Patagonia

    Directory of Open Access Journals (Sweden)

    Rafael Labarca Encina

    2009-12-01

    Full Text Available  Se presenta un análisis osteométrico uni y multivariado con los materiales fósiles -principalmente huesos cortos y falanges- de Vicugna sp. del yacimiento Cueva Lago Sofía 4 (13500 – 11000 AP, ubicado en la provincia de Última Esperanza (Región de Magallanes, Chile. Los resultados indican que los elementos analizados poseen un tamaño compatible con los registrados para Vicugna vicugna, no superando en ningún caso a los especímenes conocidos para Vicugna gracilis del Pleistoceno de la región Pampeana. Esto confirma la información morfológica y de ADN antiguo que indicaba la presencia de Vicugna vicugna en la Patagonia meridional chilena. Se discuten los resultados en términos taxonómicos, biogeográficos y paleoecológicos sugiriendo que la presencia de este taxón fuera de su rango actual de distribución se debió a las condiciones ambientales compartidas entre la Puna y Patagonia austral durante la transición Pleistoceno-Holoceno. La extinción de V. vicugna se habría debido al impacto de los cambios climáticos ocurridos al inicio del Holoceno producto de su dieta pastadora y etología no migratoria y territorial, a lo que se habría sumado una caza por parte de depredadores humanos y no humanos.Palabras clave: género Vicugna, osteometría, Pleistoceno, Patagonia AbstractThis contribution presents the results of single and multi-variable osteometric analyses performed on a sample of short bones and phalanxes assigned to Vicugna sp. from Lago Sofía Cave 4 site (13500 – 11000 BP, Región de Magallanes, Chile. The elements analyzed show a similar size to the reference collections for Vicugna vicugna, and do not exceed the metrics for the pampean pleistocenic specimens of Vicugna gracilis. This confirms the morphological and ancient DNA data that indicated the presence of vicuña in southern Chilean Patagonia. The taxonomic, biogeographic and palaeoecologic discussion of these results, suggests that the presence of this

  3. Territorio y ganadería en la Patagonia Argentina: desertificación y rentabilidad en la Meseta Central de Santa Cruz

    Directory of Open Access Journals (Sweden)

    Larry Andrade

    2002-01-01

    Full Text Available El artículo revisa brevemente las características que asume el proceso de desertificación en la Patagonia Austral, con énfasis en la provincia de Santa Cruz, Argentina. Se hacen referencias a la ocupación del territorio santacruceño por el ganado ovino, a fines del siglo XIX y con más intensidad a principios del siglo XX, y el impacto que ello conllevó, especialmente el desencadenamiento de un proceso erosivo (desertificación, producido básicamente por el pastoreo constante (sobrepastoreo del pastizal natural. También se encuentran referencias al sector ganadero y su participación en el producto bruto geográfico (PBG de Santa Cruz y, hacia el final, un análisis comparativo de la cantidad de animales que el productor estima que puede sostener en su campo y la cantidad que el Instituto Nacional de Tecnología Agropecuaria (INTA, con base en relevamientos de pastizal, calcula que podría mantener.

  4. The AUSTRAL VLBI observing program

    Science.gov (United States)

    Plank, L.; Lovell, J. E. J.; McCallum, J. N.; Mayer, D.; Reynolds, C.; Quick, J.; Weston, S.; Titov, O.; Shabala, S. S.; Böhm, J.; Natusch, T.; Nickola, M.; Gulyaev, S.

    2017-07-01

    The AUSTRAL observing program was started in 2011, performing geodetic and astrometric very long baseline interferometry (VLBI) sessions using the new Australian AuScope VLBI antennas at Hobart, Katherine, and Yarragadee, with contribution from the Warkworth (New Zealand) 12 m and Hartebeesthoek (South Africa) 15 m antennas to make a southern hemisphere array of telescopes with similar design and capability. Designed in the style of the next-generation VLBI system, these small and fast antennas allow for a new way of observing, comprising higher data rates and more observations than the standard observing sessions coordinated by the International VLBI Service for Geodesy and Astrometry (IVS). In this contribution, the continuous development of the AUSTRAL sessions is described, leading to an improvement of the results in terms of baseline length repeatabilities by a factor of two since the start of this program. The focus is on the scheduling strategy and increased number of observations, aspects of automated operation, and data logistics, as well as results of the 151 AUSTRAL sessions performed so far. The high number of the AUSTRAL sessions makes them an important contributor to VLBI end-products, such as the terrestrial and celestial reference frames and Earth orientation parameters. We compare AUSTRAL results with other IVS sessions and discuss their suitability for the determination of baselines, station coordinates, source coordinates, and Earth orientation parameters.

  5. Hydroclimatic conditions trigger record harmful algal bloom in western Patagonia (summer 2016)

    OpenAIRE

    León-Muñoz, Jorge; Urbina, Mauricio A.; Garreaud, René; Iriarte, José Luis

    2018-01-01

    A harmful algal bloom (HAB) of the raphidophyta alga Pseudochattonella cf. verruculosa during the 2016 austral summer (February-March) killed nearly 12% of the Chilean salmon production, causing the worst mass mortality of fish and shellfish ever recorded in the coastal waters of western Patagonia. The HAB coincided with a strong El Niño event and the positive phase of the Southern Annular Mode that altered the atmospheric circulation in southern South America and the adjacent Pacific Ocean. ...

  6. Patagonia: nature and territories

    Directory of Open Access Journals (Sweden)

    Alejandro Fabián Schweitzer

    2014-12-01

    This paper analyzes the place occupied by Patagonia in today’s fin de siècle scenario of commodities, hegemony crisis and multi-polar world emergence concurring with the convergence of consumerist guidelines, all of which would apparently lead to an in-depth socio-ecological crisis as well as to an accelerated dispute over nature and territory sense.

  7. Provincia de Santa Cruz, República Argentina: Políticas estatales en educación a distancia mediante el uso de tecnologías de la información y la comunicación

    Directory of Open Access Journals (Sweden)

    Cesar Hector Ferro

    2014-06-01

    Full Text Available El presente es el Informe Final de la Beca de Investigación para alumnos de Postgrado que fuera otorgada al autor mediante Resolución Nro. 0354-R-UNPA. Es una actividad descriptiva que recoge información acerca de la Educación a Distancia mediada por Tecnologías de la Información y la Comunicación, observando políticas estatales concretas: las de la Universidad Nacional de la Patagonia Austral, y las que lleva a cabo, en el mismo campo, el Estado provincial en Santa Cruz. Se trata de ver de qué manera organismos del Estado pusieron en acción procesos que promueven la circulación de conocimiento en una sociedad específica, sobre la base de las Tecnologías de la Información y la Comunicación. Asimismo, se incluye una descripción histórica del desarrollo económico de la provincia de Santa Cruz, así como un estado del mismo en la actualidad, a efectos de hacer visible la importancia básica de la acción estatal en dicho proceso.

  8. Patagonia: tocando las fibras internas

    OpenAIRE

    Velasco Tafur, Ximena; Borrero Caldas, Silvio

    2013-01-01

    El presente caso, está enfocado en Patagonia, una compañía que desde sus inicios ha desarrollado una forma poco convencional en su estilo de hacer negocios. La gerencia de Patagonia considera que muchos errores administrativos obedecen a que las empresas formulan las mismas soluciones para todos los problemas que enfrentan. Además, desde la revolución industrial, tales soluciones han privilegiado las ganancias económicas sobre la sostenibilidad ambiental, y el planeta está pasando factura por...

  9. Reshaping production structure in Patagonia Austral. Development options in Santa Cruz and its labor markets

    Directory of Open Access Journals (Sweden)

    Carlos Alberto Vacca

    2015-12-01

    None the less, the model that has prevailed in the province of Santa Cruz has been characterized by the same research team as subsidizer and of rentier character, noting that most of the population don’t receive their income from their own work on regional productions (coal, oil, gas, mining and industry, but receive income via state transfers, that come from royalties paid by companies from the primary sector, thus ensuring better living conditions for its inhabitants.

  10. Status and conservation of the ruddy-headed goose Chloephaga rubidiceps Sclater (Aves, Anatidae in its wintering grounds (Province of Buenos Aires, Argentina Estado y conservación del cauquén colorado Chloephaga rubidiceps Sclater (Aves, Anatidae en su zona de invernada (Provincia de Buenos Aires, Argentina

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    DANIEL E BLANCO

    2003-03-01

    Full Text Available ABSTRACT The mainland population of the ruddy-headed goose (Chloephaga rubidiceps breeds in southern Patagonia and winters in the south of Buenos Aires province (Argentina, with a recent estimated size at around 900 individuals. This population is considered "in danger of extinction", while the Malvinas (Falkland Islands population is in well conservation status, with an estimated size of 40,000 birds. The aim of this work is to contribute with updated information about the ruddy-headed goose's population wintering in southern Buenos Aires province. The specific objectives were to better delimit its wintering area, to look for sites with large numbers, to study its habitat used, and to identify main threats to the species. Two intensive surveys were conducted during the austral winter of 1999. The results: (1 confirm the low abundance of the ruddy-headed goose supporting its critical conservation status, (2 corroborate its very restricted distribution, with more than 80 % of sightings concentrated in an area of 13,000 ha in southern Buenos Aires province, and (3 suggest that changes in the species' habitat use during the wintering season appear to be a response to changes in habitat availability, resulting from the growth of crops and pastures. The overlap between the species wintering distribution and the main wheat cropping areas of Argentina results in serious threats to this goose. Management actions are discussed to contribute to the conservation of this endangered species.La población continental del Cauquén colorado (Chloephaga rubidiceps cría en el sur de la Patagonia e inverna en el sur de la provincia de Buenos Aires (Argentina, con un tamaño poblacional estimado recientemente en alrededor de 900 individuos. Esta población está considerada "en peligro de extinción", mientras la población de las Islas Malvinas se mantiene en buen estado de conservación, con un tamaño estimado en 40.000 individuos. La meta de este trabajo es

  11. LA ACTIVIDAD TURÍSTICA EN LA PROVINCIA DE SANTA CRUZ Y SU IMPRONTA EN EL ESPACIO. EL CASO DE EL CALAFATE Y EL CHALTÉN

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    Mónica Viviana Norambuena

    2008-12-01

    ón, del proceso histórico de ocupación, de la situación en el presente teniendo en cuenta diferentes factores - demográficos, económicos, culturales y políticos-. Metodológicamente se recurrió a la observación indirecta - recursos cartográficos, imágenes satelitales, fotografías, gráficos, estadísticos, etc.-. Por último, este trabajo se enmarca en el doctorado con mención en Ciencias Sociales y Humanas de la Universidad Nacional de Quilmes, cuya tesis es EspaciosPeriféricos, Medio Ambiente y Región en la Patagonia Austral. Vinculaciones geográficas y sociopolíticas de la región cordillerana de Santa Cruz.

  12. Revisión de la distribución de Hyalella Smith, 1874 (Crustacea, Amphipoda) en la Patagonia e islas adyacentes Revision of the distribution of Hyalella Smith, 1874 (Crustacea, Amphipoda) in Patagonia and adjacent islands

    OpenAIRE

    Patricio De los Ríos-Escalante; Andrés Mansilla; Christopher B Anderson

    2012-01-01

    Se realiza una revisión de las especies de anfípodos del género Hyalella en aguas continentales de la Patagonia, isla Tierra del Fuego, Reserva de la Biosfera de Cabo de Hornos e islas adyacentes (38-54°S). Esta zona austral presenta numerosos tipos de ambientes acuáticos continentales como lagos, humedales y arroyos, y las principales especies en ambientes bentónicos corresponden a anfípodos del género Hyalella. La bibliografía menciona la presencia de H. costera, H. chiloensis, H. falklande...

  13. Telón de fondo: Paisajes de desierto y alteridad en la fotografía de la Patagonia (1880-1900 Backdrop: Desert and Alterity Landscapes in the Photography of Patagonia (1880-1900

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    Carlos Masotta

    2009-12-01

    Full Text Available El paisaje patagónico construido por la fotografía del período 1880-1900 fue un marco en donde se llevó a cabo el ingreso civilizatorio. Luego de una caracterización general del problema (el paisaje desierto como «escenificación de ausencia» en torno a los primeros álbumes de Estado sobre la región, centro el análisis de este artículo en dos obras que describieron el Territorio de Chubut: Viaje a la Patagonia Austral (1886 del Coronel Luis Fontana y la Excursión a la Patagonia y a los Andes de Aarón Anchorena (1902. Entre ellas puede observarse la articulación de una mirada militar y civil donde el paisaje fotográfico del desierto se involucra en la toma material y simbólica del territorio como un escenario donde se «naturaliza» la actuación de un ingreso civilizatorio y la desaparición de los pueblos indígenas.The Patagonian landscape built up by photography during the 1880-1900 periods was the framework in which the civilizing entrance took action. After a general description of the problem (the deserted landscape as the staging of absence about the first State's albums on the region, I focus the analysis on two works describing the Territory of Chubut: Viaje a la Patagonia Austral (Trip to Southern Patagonia by Coronel Luis Fontana (1886 and Excursion a la Patagonia y a los Andes (Tour to Patagonia and the Andes, de Aaron Anchorena (1902. The articulation of a military and civil glance can be observed between them, where the photographic landscape of the desert is involved in the material and symbolic shot of the territory as a stage where the acting of a civilizing entrance and the disappearance of the indigenous peoples is naturalized.

  14. Cardenolide glycosides from Elaeodendron australe var. integrifolium.

    Science.gov (United States)

    Butler, Mark S; Towerzey, Leanne; Pham, Ngoc B; Hyde, Edward; Wadi, Sao Khemar; Guymer, Gordon P; Quinn, Ronald J

    2014-02-01

    Extracts from dried leaf and stems of Elaeodendron australe var. integrifolium (Celastraceae) collected in South East Queensland, Australia, were active in an assay that measured Ca(2+) driven expression of IL-2/luciferase designed to identify inhibitors of the ICRAC channel. Bioassay-guided isolation using C18 and polyamide column chromatography, HPLC (Phenyl and C18) and centrifugal partition chromatography (CPC) led to the isolation of digitoxigenin (1) and three cardenolide glycosides, glucoside 2, quinovoside 3 and the new natural product xyloside 4, as the active components with low nM activity in the reporter assay. Copyright © 2013 Elsevier Ltd. All rights reserved.

  15. Galaxias australes con núcleo doble

    Science.gov (United States)

    Gimeno, G.; Díaz, R.; Carranza, G.

    Se estudia una muestra de galaxias australes con núcleo doble a partir de una búsqueda extensiva en la literatura. Se analizan las características morfológicas, fotométricas y espectroscópicas de la muestra. Para algunas galaxias se han realizado observaciones con el espectrógrafo multifunción (EMF) de la Estación Astrofísica de Bosque Alegre a partir de las cuales se determinaron parámetros cinemáticos.

  16. Rehabilitación de la Patagonia. Un territorio periférico escrito por la narrativa argentina actual

    Directory of Open Access Journals (Sweden)

    Alejandro Gasel

    2011-07-01

    Full Text Available http://dx.doi.org/10.5007/1984-784X.2011v11n16p50 La comunicación consiste en la exposición de las formas de la inscripción de la Patagonia Austral en la contemporaneidad de la narrativa argentina. Puntualmente pensando dos novelas: Falsa Calma de Sonia Cristoff (2004 y La Siberia de Cristina Siscar (2006  trataremos de razonar qué  sigue de vigente y qué aparece como una rehabilitación  de este territorio en el proceso de producción narrativa. En este sentido, pensamos que podemos plantear  no solamente el fenómeno de la representación actual de este territorio sino la productividad reconocida en los textos a partir de un juego intertextual, que sincretiza a una memoria precedente que ha descripto y inscripto el territorio con la necesidad de referencia la crisis del presente o actualidad del territorio en formas de umbralidad. Para dar cuenta de este proceso  hemos de remitirnos a pensar la enunciación  de los textos, los usos de géneros discursivos, en especial, el relato viaje y la implicancia de la historia y la memoria para referirse políticamente a la Patagonia Austral argentina que sigue siendo tematizado en el variopinto paisaje de la Literatura Argentina.

  17. Rehabilitación de la Patagonia. Un territorio periférico escrito por la narrativa argentina actual

    Directory of Open Access Journals (Sweden)

    Alejandro Gasel

    2011-06-01

    Full Text Available La comunicación consiste en la exposición de las formas de la inscripción de la Patagonia Austral en la contemporaneidad de la narrativa argentina. Puntualmente pensando dos novelas: Falsa Calma de Sonia Cristoff (2004 y La Siberia de Cristina Siscar (2006 trataremos de razonar qué sigue de vigente y qué aparece como una rehabilitación de este territorio en el proceso de producción narrativa. En este sentido, pensamos que podemos plantear no solamente el fenómeno de la representación actual de este territorio sino la productividad reconocida en los textos a partir de un juego intertextual, que sincretiza a una memoria precedente que ha descripto y inscripto el territorio con la necesidad de referencia la crisis del presente o actualidad del territorio en formas de umbralidad. Para dar cuenta de este proceso hemos de remitirnos a pensar la enunciación de los textos, los usos de géneros discursivos, en especial, el relato viaje y la implicancia de la historia y la memoria para referirse políticamente a la Patagonia Austral argentina que sigue siendo tematizado en el variopinto paisaje de la Literatura Argentina.

  18. Relevamiento de HI en el Hemisferio Austral

    Science.gov (United States)

    Arnal, E. M.; Bajaja, E.; Morras, R.; Pöppel, W. G. L.

    Un nuevo relevamiento de HI de todo el Hemisferio Austral, comprendido entre -90o de ~50000 posiciones en el cielo serán observadas, espaciadas en una grilla (lxb) de (0.5o x 0.5o). El intervalo de velocidades cubierto en este relevamiento abarca el rango -450 km/s a +450 km/s en el sistema LSR. Esta base de datos será corregida por efectos de ``stray radiation''. Al presente se ha observado ~70% del total del relevamiento. El mismo es complementario de uno similar realizado en el Hemisferio Norte por Hartman y Burton (1996), con cubrimiento espacial, sensibilidad, resoluciones espaciales y en velocidad, similares a los del IAR. El objetivo final de ambos relevamientos es disponer de una base de datos uniforme en todo el cielo.

  19. Hydroclimatic conditions trigger record harmful algal bloom in western Patagonia (summer 2016).

    Science.gov (United States)

    León-Muñoz, Jorge; Urbina, Mauricio A; Garreaud, René; Iriarte, José Luis

    2018-01-22

    A harmful algal bloom (HAB) of the raphidophyta alga Pseudochattonella cf. verruculosa during the 2016 austral summer (February-March) killed nearly 12% of the Chilean salmon production, causing the worst mass mortality of fish and shellfish ever recorded in the coastal waters of western Patagonia. The HAB coincided with a strong El Niño event and the positive phase of the Southern Annular Mode that altered the atmospheric circulation in southern South America and the adjacent Pacific Ocean. This led to very dry conditions and higher than normal solar radiation reaching the surface. Using time series of atmospheric, hydrologic and oceanographic data we show here that an increase in surface water temperature and reduced freshwater input resulted in a weakening of the vertical stratification in the fjords and sounds of this region. This allowed the advection of more saline and nutrient-rich waters, ultimately resulting in an active harmful algal bloom in coastal southern Chile.

  20. Revisión de la distribución de Hyalella Smith, 1874 (Crustacea, Amphipoda) en la Patagonia e islas adyacentes

    OpenAIRE

    De los Ríos-Escalante,Patricio; Mansilla,Andrés; Anderson,Christopher B

    2012-01-01

    Se realiza una revisión de las especies de anfípodos del género Hyalella en aguas continentales de la Patagonia, isla Tierra del Fuego, Reserva de la Biosfera de Cabo de Hornos e islas adyacentes (38-54°S). Esta zona austral presenta numerosos tipos de ambientes acuáticos continentales como lagos, humedales y arroyos, y las principales especies en ambientes bentónicos corresponden a anfípodos del género Hyalella. La bibliografía menciona la presencia de H. costera, H. chiloensis, H. falklande...

  1. Morfometría externa y reparto de recursos en zorros simpátricos (Pseudalopex culpaeus y P. griseus) en el sureste de la Patagonia Argentina

    OpenAIRE

    Zapata, Sonia C.; Procopio, Diego E.; Martínez-Peck, Rolando; Zanón, Juan I.; Travaini, Alejandro

    2008-01-01

    Estudios previos han demostrado que el tamaño corporal de zorros grises o chillas (Pseudalopex griseus) y colorados o culpeos (P. culpaeus) es similar en alopatría, y que en simpatría se produce una divergencia en el tamaño de ambos zorros. El aumento en la diferencia del tamaño corporal entre las dos especies hacia la porción más austral de su distribución (Patagonia Argentina y sur de Chile) permitiría una especialización hacia diferentes recursos favoreciendo su coexistencia. Sin embargo, ...

  2. Valorización de la naturaleza y disputa por el territorio en la Provincia de Santa Cruz

    OpenAIRE

    Godoy, Pablo; Fasioli, Enzo; Valiente, Silvia; Schweitzer, Alejandro

    2013-01-01

    Desde los inicios de la colonización europea, la historia de la Patagonia es la trayectoria de la ocupación para la puesta en valor de la riqueza de sus bienes naturales en el suelo, subsuelo y en su extenso litoral marítimo. Asentados primero en la explotación del ovino, luego del petróleo, el gas y el carbón y recientemente de la pesca, la minería metalífera y el turismo internacional, los territorios de las actuales provincias de Santa Cruz, del Chubut y de Tierra del Fuego, al igual que s...

  3. "Jejenes" (Diptera: Simuliidae of Nahuel Huapi National Park, Patagonia, Argentina: Preliminary results "Jejenes" (Diptera: Simuliidae del Parque Nacional Nahuel Huapi, Patagonia, Argentina: Resultados preliminares

    Directory of Open Access Journals (Sweden)

    Luis M. Hernández

    2009-06-01

    Full Text Available The Simuliidae is a family of Diptera with approximately 2072 described species worldwide. The females of the majority of the species feed from vertebrates' blood, which makes them a significant plague that affects both men as well as cattle, birds, and other vertebrates. The objective of this paper is to create an inventory of Simuliidae and to reveal certain aspects of the biology and distribution of this family of aquatic insects in the Nahuel Huapi National Park. Moreover, information on the zoogeography of Simuliidae in Patagonia is provided. Five genera, 3 subgenera and 32 species Simuliidae are recorded from Patagonia: Cnesia (three spp., Cnesiamima (one sp., Gigantodax (14 spp., Paraustrosimulium (one sp., Simulium (Ectemnaspis (one sp., S. (Psaroniocompsa (one sp. and S. ( Pternaspatha (11 spp., At present, we have collected all five genera, one subgenus of Simulium (Pternaspatha, and 19 species of Simuliidae in the park, which amounts to 57% of the Simuliidae fauna in this area. Puerto Blest, a characteristic area of the High-Andean phytogeographical province (humid forest, showed the highest diversity of Simuliidae.Los simúlidos pertenecen a una familia de Diptera (Simuliidae con alrededor de 2.072 especies descritas a nivel mundial. Las hembras de la mayoría de las especies se alimentan con sangre de vertebrados, lo cual las convierte en importantes plagas que afectan tanto al hombre como al ganado, aves y otros vertebrados. Los objetivos de este trabajo son llevar a cabo un inventario de Simuliidae y dar a conocer algunos aspectos de la biología y la distribución de esta familia de insectos acuáticos en el Parque Nacional Nahuel Huapi, Argentina. Además, se proporciona información sobre la biogeografía de Simuliidae en la Patagonia. Cinco géneros, un subgénero y 32 especies de simúlidos han sido registrados para Patagonia: Cnesia (3 spp., Cnesiamima (1 sp., Gigantodax (14 spp., Paraustrosimulium (1 sp., Simulium

  4. Organic carbon in glacial fjords of Chilean Patagonia

    Science.gov (United States)

    Pantoja, Silvio; Gutiérrez, Marcelo; Tapia, Fabián; Abarzúa, Leslie; Daneri, Giovanni; Reid, Brian; Díez, Beatriz

    2016-04-01

    The Southern Ice Field in Chilean Patagonia is the largest (13,000 km2) temperate ice mass in the Southern hemisphere, yearly transporting ca. 40 km3 of freshwater to fjords. This volume of fresh and cold water likely affects adjacent marine ecosystems by changing circulation, productivity, food web dynamics, and the abundance and distribution of planktonic and benthic organisms. We hypothesize that freshwater-driven availability of inorganic nutrient and transport of organic and inorganic suspended matter, as well as microbes, become a controlling factor for productivity in the fjord associated with the Baker river and Jorge Montt glacier. Both appear to be sources of silicic acid, but not of nitrate and particulate organic carbon, especially during summer, when surface PAR and glacier thawing are maximal. In contrast to Baker River, the Jorge Montt glacier is also a source of dissolved organic carbon towards a proglacial fjord and the Baker Channel, indicating that a thorough chemical description of sources (tidewater glacier and glacial river) is needed. Nitrate in fiord waters reaches ca. 15 μM at 25 m depth with no evidence of mixing up during summer. Stable isotope composition of particulate organic nitrogen reaches values as low as 3 per mil in low-salinity waters near both glacier and river. Nitrogen fixation could be depleting δ15N in organic matter, as suggested by the detection at surface waters of nif H genes belonging to diazotrophs near the Montt glacier. As diazotrophs have also been detected in other cold marine waters (e.g. Baltic Sea, Arctic Ocean) as well as glaciers and polar terrestrial waters, there is certainly a potential for both marine and freshwater microbes to contribute and have a significant impact on the Patagonian N and C budgets. Assessing the impact of freshwater on C and N fluxes and the microbial community structure in Patagonian waters will allow understanding future scenarios of rapid glacier melting. This research was funded

  5. The Maritime Cultural Landscape of Northern Patagonia

    Science.gov (United States)

    Lira, Nicolás

    2017-12-01

    This article is a contribution to the study of the indigenous navigation and its boats in the region of northern Patagonia. This article also aims to contribute to the understanding of indigenous navigation practices and technologies and their origins from prehistoric times to the mid-twentieth century. It presents and discusses the concept of Westerdahl's Maritime Cultural Landscape in relation to other landscape concepts. This model is applied to northern Patagonia in order to discuss if it is possible to speak of a true maritime culture in the region. For this purpose, archaeological, historical and ethnographic data are presented in an integrative and innovative methodology for the discipline. Finally, the Maritime Cultural Landscape model will allow the integration of aquatic and terrestrial landscapes as routes traveled by native inhabitants of northern Patagonia and southern Chile, and propose an important and diversified maritime, river and lake tradition.

  6. Ensambles de aves en agroecosistemas de la provincia de Buenos Aires: su relación con los patrones de uso de la tierra y las características del paisaje

    OpenAIRE

    Codesido, Mariano

    2010-01-01

    Entre enero de 2006 y enero de 2008 se estudió estacionalmente la estructura de los ensambles de aves en los agroecosistemas de las diferentes unidades ecológicas de la Región Pampeana comprendidas dentro de la provincia de Buenos Aires (Pampa Ondulada, Pampa Interior Plana, Pampa Interior Arenosa, Pampa Deprimida y Pampa Austral). Los objetivos generales de la tesis son: a) describir la estructura de los ensambles de aves terrestres de los agroecosistemas de la provincia de Buenos Aires, b) ...

  7. LA PATAGONIA ORIENTAL SEGÚN UNA REAL CÉDULA de 1570 MENOSPRECIADA POR LA HISTORIOGRAFÍA CHILENA

    Directory of Open Access Journals (Sweden)

    MANUEL RAVEST MORA

    2005-12-01

    Full Text Available Versa este trabajo sobre la Real Cédula de Felipe II que, en 1570, fusionó parte de la Patagonia Oriental con la Provincia del Río de la Plata, origen de la República Argentina, donde, al parecer, supieron del documento treinta años después de finalizado el debate con Chile acerca de los derechos al extremo meridional de América. Descubierta por un diplomático chileno, que informó de ella a su Cancillería en 1876 y la mencionó en un libro publicado en 1903, ha sido sistemáticamente ignorada por los escritores chilenos. Examina este trabajo las posibles causas de ese silencio historiográfico, como también las rectificaciones que la RC introduce en la tesis clásica o fundacional de Chile, formulada a mediados del XIX por Miguel Luis Amunátegui, según la cual ese país siempre ejerció jurisdicción sobre la totalidad de la Patagonia Oriental desde 1554This work deals with a 1570 Phillip the II Decree that fused a section of Atlantic Patagonia with the Rio de la Plata Province, origin of late Argentine Republic, who, apparently, learned about it thirty years after ended the discussion held with Chile in respect the rights of each country towards the southern extreme of America. Found by a chilean diplomat, who informed his Ministry of Foreign Affairs in 1876 and wrote about the document in a book published in 1903, it has been systematically ignored by chilean scholars. The work examines the possible causes for this historiographyc silence, and the rectifications that the Royal Decree introduces in the classical chilean thesis about Patagonia, enounced by Miguel Luis Amunategui in middle XIX century, according to which that whole territory always belonged to Chile since 1554

  8. Chondrichthyans of the San Matías Gulf, Patagonia, Argentina Los condrictios del Golfo San Matías, Patagonia, Argentina

    Directory of Open Access Journals (Sweden)

    María R PERIER

    2011-12-01

    Full Text Available The San Matías Gulf (SMG; 41°- 42° S; 64°- 65° W is the largest gulf in Northern Patagonia, Argentina. Up to date, the chondrichthyan fauna of this area has not been reported. Therefore, the aim of this work is to provide a list with species presence and biological characteristics of the chondrichthyans recorded in SMG during the last 30 years. A total of 13 sharks distributed in 11 families, 19 skates and rays distributed in six families, and one holocephalan have been so far recorded in SMG. From the zoogeographical point of view, this chondrichthyan fauna is a mixed assemblage of species typically found in the Argentinean and Magellanean Provinces. The holocephalan Callorhinchus callorynchus is the most landed chondricthyan of the local fishery. With it, five sharks and seven skates are also exploited.El Golfo San Matías (SMG; 41°- 42° S - 64°-65° O se encuentra ubicado en el norte de la Patagonia, Argentina. Hasta la fecha no se cuentan con reportes de la fauna de condrictios de esta zona. Por lo tanto, el objetivo de este trabajo es proporcionar una lista de la presencia y las características biológicas de los condrictios registrados en el SMG durante los últimos 30 años. Un total de 13 tiburones distribuidos en 11 familias, 19 batoideos distribuidos en seis familias y un holocefalo han sido reportados para la zona. Desde el punto de vista zoogeográfico, el SMG presenta un ensamble de especies pertenecientes a las Provincias Magallánica y Argentina. El holocefalo Callorhinchus callorynchus es el condrictio más desembarcado de la pesquería local. Con menor importancia son explotadas comercialmente, cinco especies de tiburones y siete de rayas.

  9. Marine reptiles from the Late Cretaceous of northern Patagonia

    Science.gov (United States)

    Gasparini, Z.; Casadio, S.; Fernández, M.; Salgado, L.

    2001-04-01

    During the Campanian-Maastrichtian, Patagonia was flooded by the Atlantic and reduced to an archipelago. Several localities of northern Patagonia have yielded marine reptiles. Analysis of several assemblages suggests that the diversity and abundance of pelagic marine reptiles in northern Patagonia was higher by the end of the Cretaceous than previously thought. Several plesiosaurids, including Aristonectes parvidens and the polycotylid Sulcusuchus, and the first remains of mosasaurinae have been found. The Cretaceous marine reptile record from South America is scanty. Nevertheless, materials described here suggest that Tethyan and Weddelian forms converged in northern Patagonia, as seen with invertebrates.

  10. Intestinal helminth fauna of the South American sea lion Otaria flavescens and fur seal Arctocephalus australis from northern Patagonia, Argentina.

    Science.gov (United States)

    Hernández-Orts, J S; Montero, F E; Juan-García, A; García, N A; Crespo, E A; Raga, J A; Aznar, F J

    2013-09-01

    We report on the intestinal helminth fauna of 56 South American sea lions, Otaria flavescens, and 5 South American fur seals, Arctocephalus australis, from northern Patagonia, Argentina. A total of 97,325 helminth specimens were collected from sea lions. Gravid individuals were represented by 6 species of parasites: 1 digenean (Ascocotyle (Ascocotyle) patagoniensis), 1 cestode (Diphyllobothrium spp.), 3 nematodes (Uncinaria hamiltoni, Contracaecum ogmorhini s.s., Pseudoterranova cattani) and 1 acanthocephalan (Corynosoma australe). In addition, third-stage larvae of 2 nematodes (Contracaecum sp. and Anisakis sp. type I) and 3 juvenile acanthocephalans (Andracantha sp., Profilicollis chasmagnathi and Corynosoma cetaceum) were also collected. Andracantha sp., C. ogmorhini s.s. and P. chasmagnathi represent new host records. A total of 1516 helminth specimens were collected from fur seals. Gravid individuals were represented by three species of parasites, namely, Diphyllobothrium spp., C. ogmorhini s.s. and C. australe. In addition, larvae of Contracaecum sp. and P. cattani, juveniles of C. cetaceum and immature cestodes (Tetrabothriidae gen. sp.) were also collected. Corynosoma australe was the most prevalent and abundant parasite in both hosts, accounting for >90% of all specimens. Sea lions and furs seals from northern Patagonia harbour the intestinal helminth communities that could be predicted for otariids, i.e. the combination of species of the genera Corynosoma, Diphyllobothrium, Pseudoterranova, Contracaecum and, in pups, Uncinaria. Additionally, both species of otariid are apparently unsuitable hosts (i.e. non-hosts) for as many as five parasite taxa. The inclusion or exclusion of these species affects estimation of species richness at both component community (11 versus 6 species in sea lions; 7 versus 3 species in fur seals) and infracommunity (mean: 3.1 versus 2.6 in sea lions; 2.2 versus 1.7 species) levels. Information about the reproductive status of

  11. Geochemistry of the Puna Austral and Cordillera Oriental basement

    International Nuclear Information System (INIS)

    Becchio, Raul; Lucassen, Friedrich; Franz, Gerhard; Kasemann, Simone

    1998-01-01

    Major and trace elements, rare earths, and 143 Nd/ 147 Nd and, 147 Sm/ 144 Nd isotope ratios have been determined in the Puna Austral and Cordillera Oriental basement. The basement is formed by high temperature amphibolite facies rocks ranulites (750-550 degrees C) and green schists. They are represented by schists, paragneiss, orthogneiss, migmatites, few metabasites, marbles and chalcosilicatic banks. Hypotheses on the formation and evolution of the basement are presented

  12. Arago Seamount: The missing hotspot found in the Austral Islands

    Science.gov (United States)

    Bonneville, Alain; Le Suavé, Raymond; Audin, Laurence; Clouard, Valérie; Dosso, Laure; Yves Gillot, Pierre; Janney, Philip; Jordahl, Kelsey; Maamaatuaiahutapu, Keitapu

    2002-11-01

    The Austral archipelago, on the western side of the South Pacific superswell, is composed of several volcanic chains, corresponding to distinct events from 35 Ma to the present, and lies on oceanic crust created between 60 and 85 Ma. In 1982, Turner and Jarrard proposed that the two distinct volcanic stages found on Rurutu Island and dated as 12 Ma and 1 Ma could be due to two different hotspots, but no evidence of any recent aerial or submarine volcanic source has ever been found. In July 1999, expedition ZEPOLYF2 aboard the R/V L'Atalante conducted a geophysical survey of the northern part of the Austral volcanic archipelago. Thirty seamounts were mapped for the first time, including a very shallow one (French Navy ship that discovered its summit in 1993, is the missing hotspot in the Cook-Austral history. This interpretation adds a new hotspot to the already complicated geologic history of this region. We suggest that several hotspots have been active simultaneously on a region of the seafloor that does not exceed 2000 km in diameter and that each of them had a short lifetime (<20 m.y.). These short-lived and closely spaced hotspots cannot be the result of discrete deep-mantle plumes and are likely due to more local upwelling in the upper mantle strongly influenced by weaknesses in the lithosphere.

  13. Primer registro de Naupactus ruizi (Coleoptera: Curculionoidea asociado con Pinus ponderosa (Gymnospermae: Pinaceae en Patagonia

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    Cecilia A. GOMEZ

    2006-01-01

    Full Text Available Naupactus ruizi (Brèthes es un gorgojo de rostro corto, distribuido en la Argentina y Chile, que habita en ambientes áridos asociado con vegetación xerofítica y alcanza el rango más austral entre los miembros de la tribu Naupactini. Un relevamiento de insectos y de patógenos como plagas potenciales, realizado durante el 2005 en plantaciones de Pinus spp. en la Patagonia andina argentina, resultó en el hallazgo de adultos de N. ruizi que se alimentaban de acículas de Pinus ponderosa Dougl. ex Laws. Este hallazgo es sorprendente dado que las especies de Naupactini, consumen casi exclusivamente angiospermas. Interpretamos que el cambio de huésped, habría ocurrido como consecuencia de una colonización reciente favorecida por la amplia distribución geográfica del gorgojo y su capacidad para sobrevivir en hábitats marginales, donde probablemente las plantas nativas son escasas y el nuevo huésped presenta una gran abundancia local.

  14. Geomorphological evidences of Quaternary tectonic activities in the Santa Cruz river valley, Patagonia, Argentina

    International Nuclear Information System (INIS)

    Massabie, A.; Sanguinetti, A.; Nestiero, O.

    2007-01-01

    From Argentin lake, at west on Andean hills, to Puerto Santa Cruz on Atlantic coast, Santa Cruz river cross eastward Santa Cruz province over 250 km in Patagonia at southern Argentina. Present bed of the river has a meandering outline with first order meanders of great ratio bends and second order meanders of minor ratio bends. Principal wanderings are 45 to 55 km spaced from near Estancia La Julia or Rio Bote at west to Comandante Luis Piedrabuena at east. On river's bed middle sector these great curvatures are located at Estancia Condor Cliff and Estancia Rincon Grande. Regional and partial detailed studies allow to recognize structural control on river's bed sketch and valley s geomorphology that relates first order bends with reactivated principal faults. These faults fit well with parallel system of northwest strike of Austral Basin.On geological, geomorphologic and structural evidences recognized in Santa Cruz river, quaternary tectonic activity, related to Andean movements in southern Patagonian foreland, is postulated. (author)

  15. Cuatro nuevas especies del género Liolaemus (Iguania: Liolaemidae, pertenecientes al grupo boulengeri, de la Patagonia, Argentina

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    Abdala, Cristian Simón

    2003-12-01

    Full Text Available Se describen cuatro nuevas especies del género Liolaemus, pertenecientes al grupo boulengeri, caracterizado por la presencia de un parche femoral de escamas agrandadas en la parte posterior del fémur. Una especie fue colectada en el sur de la provincia de Neuquén y las otras tres en el suroeste, centro y este de la provincia de Río Negro, en la Patagonia Argentina. Dentro del grupo las nuevas especies están relacionadas fenéticamente a Liolaemus boulengeri. Se estudiaron 98 caracteres morfológicos externos, referidos principalmente a caracteres de lepidosis, patrón de coloración y proporciones corporales, corrientemente estudiados en Liolaemus. Las diferencias más significativas entre estas especies y Liolaemus boulengeri se dan principalmente en el patrón de coloración y en algunos caracteres de escamación. Estas especies ocupan parte de las tres regiones patagónicas que se diferencian con base en la orografía y vegetación asociada. Las nuevas especies del centro y suroeste de la provincia de Río Negro, soportan grandes diferencias de temperatura diarias y estacionales. Las cuatro especies que se describen aquí se alimentan principalmente de insectos. Four new species of Liolaemus are described from the Patagonia region of southern Argentina. One species was collected in southern Neuquén Province and the other three are from Río Negro Province. Each of the new species has a patch of enlarged scales on the posterior surface of the thighs, indicating their relationship to members of the boulengeri group. Within this group, the four new species are morphologically most similar, and may be most closely related to, Liolaemus boulengeri. A total of 98 external morphological characters, principally squamation, color pattern, and body proportions, were recorded for these new members of the boulengeri group and compared with those for Liolaemus boulengeri. Significant differences between the new species and Liolaemus boulengeri were

  16. Fallout radiocaesium in Mackellar Inlet during the 2013 austral summer

    International Nuclear Information System (INIS)

    Osores, Jose; Gonzales, Susana

    2013-01-01

    Radiocaesium activity in soil samples and lichens collected during the austral summer were determined by high resolution gamma spectrometry. The results show that the amount of radiocaesium, retained by the lichen samples, is a function of the altitude of the sampling areas, and values in surface soil show that the amount of radiocaesium, retained by the soil, is an inverse function of the altitude of the sampling areas. Although in 2013, atmospheric radiocaesium inventory has decreased with the suspension of nuclear tests, it is still possible to register small concentrations in the air thanks to the study of lichens as bio-monitors. (authors).

  17. UNA CONCEPTUALIZACIÓN ACERCA DE LA CRONOLOGÍA DE LAS ESTACIONES ENTRE LOS TEHUELCHES DEL EXTREMO SUR DE PATAGONIA

    Directory of Open Access Journals (Sweden)

    Fabián Arias

    2006-12-01

    Full Text Available El presente trabajo intenta repasar un conjunto de categorías lingüísticas por medio de las cuales los tehuelches de la Patagonia austral significaron distintos ciclos cronológicos que se sucedían en el transcurso del año. Estos períodos remitían a fenómenos de índole natural que afectaron la cotidianeidad de las tolderías y determinaron, durante mucho tiempo, las condiciones en las que se organizó el poblamiento regional. Son justamente esas circunstancias las que se van a ver cada vez más intermediadas a partir de la incorporación del caballo, sucedida en el extremo sur, hacia la mitad del siglo XVIII.

  18. Freshwater fishes of Patagonia: conservation and fisheries.

    Science.gov (United States)

    Cussac, V E; Habit, E; Ciancio, J; Battini, M A; Riva Rossi, C; Barriga, J P; Baigún, C; Crichigno, S

    2016-07-01

    The absence of much literature on the Patagonian fish fauna in comparison with that of the neotropics, has previously been blamed on its poor species diversity. Knowledge of the fishes of Patagonia, however, rose sharply at the beginning of the present century, allowing for an understanding of the complex biogeographical history that has led to the present diversity and distribution patterns. There are several new and potential threats to biodiversity and conservation of Patagonian fishes, such as the introduction of exotic species, damming, climate change and changes geared to safeguard economic interests, often acting synergistically. A great amount of new information is now available and the aim of the present review is to articulate this knowledge in a comprehensive way in order to aid in the development of tools to face the increasing challenges posed by environmental change and human activity. Knowledge about fishes of Patagonia has grown at the same time as human actions, and presence. © 2016 The Fisheries Society of the British Isles.

  19. DESARROLLO TERRITORIAL Y DESIGUALDADES REGIONALES EN LA PROVINCIA DE SANTA CRUZ

    Directory of Open Access Journals (Sweden)

    Alejandro F. Schweitzer

    2010-12-01

    Full Text Available La Patagonia austral es un espacio con dinámicas migratorias muy fuertes particularmente luego del 2003 y un medio natural frágil, las actividades económicas, la oferta de servicios y las condiciones para la reproducción de la población se asientan en el aprovechamiento de una significativa dotación en recursos naturales distribuidos desigualmente y en mayor parte no renovables. La línea orientadora que se sigue en la ponencia es producto de la evolución de actividades de investigación y transferencia por parte de los autores en torno a las temáticas de las relaciones entre poderes y territorios, en particular en el campo del ordenamiento y el desarrollo territorial. Tomando como punto de partida conceptos clave como el de desarrollo territorial y analizando las estrategias y articulaciones de los grupos dominantes, el estado y sociedades en el área de estudio, en los últimos años y en aproximaciones desde distintas escalas, la ponencia apunta a analizar los proyectos de territorio a partir del estudio de las iniciativas hacia los territorios por parte del estado y las empresas y reflexionar sobre las situaciones conflictivas y las resistencias desde las sociedades regionales.

  20. Infraestructura y significado en la dominiación Inka del centro oeste argentino (Coa extremo austral Oriental del Tawantinsuyu

    Directory of Open Access Journals (Sweden)

    J. Roberto Bárcena

    2008-01-01

    Full Text Available Con el apoyo de la ANPCyT (SECYT y del CONICET mediante subsidios, desarrollamos investigaciones arqueológicas y etnohistóricas sobre la dominación inka en el Centro oeste argentino, extremo austral oriental del Tawantinsuyu. En la actualidad trabajamos en las provincias de La Rioja (Famatina, Laguna Brava, Guandacol, entre otras áreas, San Juan (Reserva de la Biosfera de San Guillermo, Valle Fértil, Paso del Lámar —Jáchal—, entre otros sectores y Mendoza (Valle de Uspallata, Valle de Uco, entre otras zonas, estudiando la vialidad y los sitios relacionados, excavando varios de éstos. Un abordaje de tal envergadura implica, entre otras, la posibilidad de contrastar semejanzas y diferencias en la implantación territorial, diversidad en las relaciones con las poblaciones locales y sumanifestación en los indicadores arqueológicos y etnohistóricos y permite contrastar los modelos de dominación regional. En este contexto nos referimos, desde la perspectiva del significado, al registro de bienes inka como ser, entre otros, la propia arquitectura o los relacionados con los sitios ceremoniales de alturaWith the support of the ANPCyT (SECYT and of the CONICET we have undertaken archaeological and ethnohistorical research on the Inka domination in the Argentine centralwest, at the oriental austral extreme of the Tawantinsuyu. Our team is presently working in the provinces of: La Rioja (at Famatina, Laguna Brava,Guandacol, among other areas, San Juan (at the Reserva de la Biosfera de San Guillermo, Valle Fértil and Paso del Lámar -Jáchal-, among other sectors and,Mendoza (at the Valle deUspallata, Valle deUco, among other zones, studying the net of roads and other related sites, excavating several of the later ones. Such an approach implies, between others, the possibility of contrasting similarities and differences in the territorial implantation, the diversity in relations with the local inhabitants and its manifestation in the

  1. Conservation challenges for the Austral and Neotropical America section.

    Science.gov (United States)

    Ceballos, Gerardo; Vale, Mariana M; Bonacic, Cristian; Calvo-Alvarado, Julio; List, Rurik; Bynum, Nora; Medellín, Rodrigo A; Simonetti, Javier A; Rodríguez, Jon Paul

    2009-08-01

    The Austral and Neotropical America (ANA) section of the Society for Conservation Biology includes a vast territory with some of the largest relatively pristine ecosystems in the world. With more than 573 million people, the economic growth of the region still depends strongly on natural resource exploitation and still has high rates of environmental degradation and biodiversity loss. A survey among the ANA section membership, with more than 700 members, including most of the section's prominent ecologists and conservationists, indicates that lack of capacity building for conservation, corruption, and threats such as deforestation and illegal trade of species, are among the most urgent problems that need to be addressed to improve conservation in the region. There are, however, strong universities and ecology groups taking the lead in environmental research and conservation, a most important issue to enhance the ability of the region to solve conservation and development conflicts.

  2. Distribución geográfica, historia natural y conservación del hurón menor Galictis cuja (Carnivora: Mustelidae en la Patagonia central, Argentina Geographic distribution, natural history and conservation of the lesser grison Galictis cuja (Carnivora: Mustelidae from Central Patagonia, Argentina

    Directory of Open Access Journals (Sweden)

    Marcelo Carrera

    2012-12-01

    Full Text Available El hurón menor, Galictis cuja, tiene una amplia distribución en el territorio patagónico extraandino, aunque sus registros puntuales son escasos. Este trabajo se desarrolló en la provincia del Chubut, Patagonia Central, Argentina. Aquí se aportan nuevas localidades de registro de G. cuja para esta región; se discuten aspectos de su distribución geográfica y conservación en el Área Natural Protegida Península Valdés (ANP-PV; Patrimonio Natural de la Humanidad y brevemente se explora la representación de G. cuja en los ensambles de carnívoros del ANP-PV desde el Holoceno tardío hasta la actualidad. Se adicionaron 18 nuevos registros de G. cuja en Patagonia central. Se detectó un conflicto entre los pobladores y hurones, que motiva la caza de estos últimos. Se verificó un aparente incremento de abundancia de G. cuja en los últimos miles de años, concomitante con la extinción regional o dramática disminución de Lyncodon patagonicus (Carnivora, Mustelidae.The Lesser Grison, Galictis cuja, is a species widely distributed in extra-Andean Patagonia, although its records are scarce. This work was carried out in Chubut province, Central Patagonia, Argentina. Here we report new occurrence localities of G. cuja for this region; we discuss aspects of their geographical distribution and conservation in the Área Natural Protegida Península Valdés (ANP-PV; World Heritage Site and briefly explores the representation of G. cuja in carnivore assemblages of ANP-PV, since the late Holocene to the present. We added 18 new records of G. cuja in Central Patagonia. We detected a conflict between the rural residents and the Lesser Grison, which motivates the hunting of the latter. There was an apparent increase in abundance of G. cuja in the last thousands of years, concomitant with regional extinction or dramatic reduction of Lyncodon patagonicus (Carnivora, Mustelidae.

  3. Glaciers in Patagonia: Controversy and prospects

    Science.gov (United States)

    Kargel, J. S.; Alho, P.; Buytaert, W.; Célleri, R.; Cogley, J. G.; Dussaillant, A.; Guido, Z.; Haeberli, W.; Harrison, S.; Leonard, G.; Maxwell, A.; Meier, C.; Poveda, G.; Reid, B.; Reynolds, J.; Rodríguez, C. A. Portocarrero; Romero, H.; Schneider, J.

    2012-05-01

    Lately, glaciers have been subjects of unceasing controversy. Current debate about planned hydroelectric facilities—a US7- to 10-billion megaproject—in a pristine glacierized area of Patagonia, Chile [Romero Toledo et al., 2009; Vince, 2010], has raised anew the matter of how glaciologists and global change experts can contribute their knowledge to civic debates on important issues. There has been greater respect for science in this controversy than in some previous debates over projects that pertain to glaciers, although valid economic motivations again could trump science and drive a solution to the energy supply problem before the associated safety and environmental problems are understood. The connection between glaciers and climate change—both anthropogenic and natural—is fundamental to glaciology and to glaciers' practical importance for water and hydropower resources, agriculture, tourism, mining, natural hazards, ecosystem conservation, and sea level [Buytaert et al., 2010; Glasser et al., 2011]. The conflict between conservation and development can be sharper in glacierized regions than almost anywhere else. Glaciers occur in spectacular natural landscapes, but they also supply prodigious exploitable meltwater.

  4. A new burmagomphid dragonfly from the Eocene of Patagonia, Argentina

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    Julián F. Petrulevičius

    2017-11-01

    Full Text Available A new burmagomphid anisopteran, Satelitala soberana gen. et sp. nov. is described from the lower Eocene of Laguna del Hunco, Patagonia, Argentina. The new genus is characterised by hindwing characters such as the subdiscoidal triangle not elongated; anal loop divided longitudinally; paranal cell divided longitudinally; five terminal cells between RP and MA; five terminal cells between MP and CuA; and obtuse angle between PsA and CuP+AA. Burmagomphid dragonflies were represented so far only by one specimen from the middle Cretaceous of Southeast Asia. This new record extends the distribution to Patagonia, to the Cenozoic, and also to paleolake deposits.

  5. Planeamiento estratégico de la Provincia de Islay

    OpenAIRE

    Polleri Granda, Alejandro; Saba Casapía, Amador; Miranda Ballón, Ángela; Farfán Mujica, Miryam

    2016-01-01

    El planeamiento estratégico desarrollado para la provincia de Islay, región Arequipa, tuvo como objetivo establecer las estrategias y políticas que permitirán el crecimiento económico y social de la provincia. Esto con la finalidad de garantizar un desarrollo sostenible en el tiempo, en beneficio de los pobladores de la provincia, y alcanzar un nivel competitivo que contribuirá al desarrollo de la provincia, región y del país. Es así que las estrategias planteadas en el presente documento se ...

  6. Cinemática de la extensión jurásica vinculada a la Provincia Silícea Chon Aike, Santa Cruz, Argentina

    OpenAIRE

    Japas, Maria Silvia; Sruoga, Patricia; Kleiman, Laura Elena; Gayone, María Rosario; Maloberti, Alejandro L.; Comito, Oscar

    2017-01-01

    La Provincia Silícea Chon Aike, de vasta distribución en Patagonia, plataforma continental y Península Antártica, representa un megaevento volcánico ocurrido en tiempos jurásicos (188-152 Ma), cuyo emplazamiento estuvo controlado por una tectónica extensional. El análisis cinemático llevado a cabo a partir de fallas y zonas de cizalla frágil-dúctil en cuatro localidades (El Dorado- Monserrat, Norte de Cerro Vanguardia y El Fénix, en la comarca del Deseado; y Lago Ghío, en la Cordillera Patagó...

  7. A tale of three hydros - post-privatisation in Patagonia

    International Nuclear Information System (INIS)

    Smith, H.F.

    1994-01-01

    When Argentina's state-owned utility, operating in northern Patagonia, sold off hydro-electric generating plants in 1993, they were bought by several North American utility companies. This article looks at the problems these companies encountered and examines whether the enterprise has shown itself to be economically valuable. (UK)

  8. Quantifying mass balance processes on the Southern Patagonia Icefield

    DEFF Research Database (Denmark)

    Schaefer, M.; Machguth, Horst; Falvey, M.

    2015-01-01

    We present surface mass balance simulations of the Southern Patagonia Icefield (SPI) driven by downscaled reanalysis data. The simulations were evaluated and interpreted using geodetic mass balances, measured point balances and a complete velocity field of the icefield for spring 2004. The high m...

  9. Uplift of quaternary shorelines in eastern Patagonia: Darwin revisited

    Science.gov (United States)

    Pedoja, Kevin; Regard, Vincent; Husson, Laurent; Martinod, Joseph; Guillaume, Benjamin; Fucks, Enrique; Iglesias, Maximiliano; Weill, Pierre

    2011-04-01

    During his journey on the Beagle, Darwin observed the uniformity in the elevation of coastal Eastern Patagonia along more than 2000 km. More than one century later, the sequences of Quaternary shorelines of eastern Patagonia have been described and their deposits dated but not yet interpreted in terms of geodynamics. Consequently, we i) mapped the repartition of the Quaternary coastal sequences in Argentinean Patagonia, ii) secured accurate altitudes of shoreline angles associated with erosional morphologies (i.e. marine terraces and notches), iii) took into account previous chrono-stratigraphical interpretations in order to calculate mean uplift rates since ~ 440 ka (MIS 11) and proposed age ranges for the higher and older features (up to ~ 180 m), and iv) focused on the Last Interglacial Maximum terrace (MIS 5e) as the best constrained marine terrace (in terms of age and altitude) in order to use it as a tectonic benchmark to quantify uplift rates along the entire passive margin of Eastern South America. Our results show that the eastern Patagonia uplift is constant through time and twice the uplift of the rest of the South American margin. We suggest that the enhanced uplift along the eastern Patagonian coast that interested Darwin during his journey around South America on the Beagle could originate from the subduction of the Chile ridge and the associated dynamic uplift.

  10. Airborne laser altimetry survey of Glaciar Tyndall, Patagonia

    DEFF Research Database (Denmark)

    Keller, K.; Casassa, G.; Rivera, A.

    2007-01-01

    The first airborne laser altimetry measurements of a glacier in South America are presented. Data were collected in November of 2001 over Glaciar Tyndall, Torres del Paine National Park, Chilean Patagonia, onboard a Twin Otter airplane of the Chilean Air Force. A laser scanner with a rotating...

  11. Integrando actividades en la provincia de Misiones

    OpenAIRE

    Zajdband, Ariel David

    2017-01-01

    Los establecimientos agropecuarios familiares de la provincia de Misiones se encuentran en permanente evolución. Este proceso comenzó a fines del siglo XIX como consecuencia de la llegada de inmigrantes que colonizaron las tierras de menor calidad que habían quedado sin vender. Distintos factores llevaron a la diversificación de las explotaciones familiares. La última actividad introducida es la acuicultura o cultivo de organismos acuáticos en estanques. En este contexto, la pregunta es cuál ...

  12. Larval fish feeding ecology, growth and mortality from two basins with contrasting environmental conditions of an inner sea of northern Patagonia, Chile.

    Science.gov (United States)

    Landaeta, Mauricio F; Bustos, Claudia A; Contreras, Jorge E; Salas-Berríos, Franco; Palacios-Fuentes, Pámela; Alvarado-Niño, Mónica; Letelier, Jaime; Balbontín, Fernando

    2015-05-01

    During austral spring 2011, a survey was carried out in the inland sea (41°30'-44°S) of north Patagonia, South Pacific, studying a northern basin (NB: Reloncaví Fjord, Reloncaví Sound and Ancud Gulf) characterized by estuarine regime with stronger vertical stratification and warmer (11-14 °C) and most productive waters, and a southern basin (SB: Corcovado Gulf and Guafo mouth), with more oceanic water influence, showed mixed conditions of the water column, colder (11-10.5 °C) and less productive waters. Otolith microstructure and gut content analysis of larval lightfish Maurolicus parvipinnis and rockfish Sebastes oculatus were studied. Larval M. parvipinnis showed similar growth rates in both regions (0.13-0.15 mm d(-1)), but in NB larvae were larger-at-age than in SB. Larval S. oculatus showed no differences in size-at-age and larval growth (0.16 and 0.11 mm d(-1) for NB and SB, respectively). M. parvipinnis larvae from NB had larger number of prey items (mostly invertebrate eggs), similar total volume in their guts and smaller prey size than larvae collected in SB (mainly calanoid copepods). Larval S. oculatus had similar number, volume and body width of prey ingested at both basins, although prey ingestion rate by size was 5 times larger in NB than in SB, and prey composition varied from nauplii in NB to copepodites in SB. This study provides evidence that physical-biological interactions during larval stages of marine fishes from Chilean Patagonia are species-specific, and that in some cases large size-at-age correspond to increasing foraging success. Copyright © 2015 Elsevier Ltd. All rights reserved.

  13. La degradación ambiental de la cuenca endoreica Coy Aike, patagonia Austral, Argentina, y su implicancia en establecimientos agropecuarios.

    Directory of Open Access Journals (Sweden)

    Paula Diez

    2014-07-01

    Full Text Available Este trabajo determina los procesos de degradación de la unidad ecológica Matorral de Mata Negra y la disminución de la capacidad de carga producida por la transformación del paisaje en la cuenca endorreica Coy Aike. A partir de la interpretación visual y el análisis de distintos cortes temporales de imágenes satelitales, se caracterizaron cuatro sectores en la cuenca: Laguna, Mata Negra, Vegetación Subarbustiva y Sin Vegetación, siendo los últimos los que presentan mayores evidencias de erosión. La dinámica de la Laguna registró una variación espacial y temporal directamente relacionada con las condiciones meteorológicas, sin embargo, la lengua de erosión asociada no presentó variabilidad. Estas últimas afectan la vegetación natural por la disminución de la disponibilidad de tierras aptas para pastoreo, y ocasionan pérdidas en el valor textil de la lana. El cálculo del costo económico que produce la erosión de los suelos se determinó teniendo en cuenta la receptividad ovina media por hectárea para el área ecológica. En el establecimiento Coy Aikem, las 211 ha de tierra improductiva representan al productor una pérdida económica de 1.925 dólares anuales, no obstante, la gravedad económica estará dada por la cantidad de bajos con potencialidad erosiva, que existan en los establecimientos agropecuarios.

  14. Programa Propedéutico De La Universidad Austral De Chile, Campus Patagonia, Región De Aysén.

    OpenAIRE

    Maillard, Bernardita; Rojas, Rodrigo; Rodríguez, José; Martínez, Jorge

    2016-01-01

    El Programa Propedéutico de la Red Propedéutica UNESCO de Universidades de Chile, se crea el año 2007 como una nueva alternativa de ingreso a la Educación Superior, destinada a jóvenes académicamente talentosos y socialmente vulnerables5 que culminan con éxito la enseñanza media y que el actual proceso de selección universitaria deja fuera del sistema Los estudiantes que cumplen con los requisitos establecidos, son seleccionados para ingresar a los Programas de Bachillerato o a las carreras p...

  15. CO2 and CH4 fluxes of contrasting pristine bogs in southern Patagonia (Tierra del Fuego, Argentina)

    Science.gov (United States)

    Münchberger, Wiebke; Blodau, Christian; Kleinebecker, Till; Pancotto, Veronica

    2015-04-01

    South Patagonian peatlands cover a wide range of the southern terrestrial area and thus are an important component of the terrestrial global carbon cycle. These extremely southern ecosystems have been accumulating organic material since the last glaciation up to now and are - in contrast to northern hemisphere bogs - virtually unaffected by human activities. So far, little attention has been given to these pristine ecosystems and great carbon reservoirs which will potentially be affected by climate change. We aim to fill the knowledge gap in the quantity of carbon released from these bogs and in what controls their fluxes. We study the temporal and spatial variability of carbon fluxes in two contrasting bog ecosystems in southern Patagonia, Tierra del Fuego. Sphagnum-dominated bog ecosystems in Tierra del Fuego are similar to the ones on the northern hemisphere, while cushion plant-dominated bogs can almost exclusively be found in southern Patagonia. These unique cushion plant-dominated bogs are found close to the coast and their occurrence changes gradually to Sphagnum-dominated bogs with increasing distance from the coast. We conduct closed chamber measurements and record relevant environmental variables for CO2 and CH4 fluxes during two austral vegetation periods from December to April. Chamber measurements are performed on microforms representing the main vegetation units of the studied bogs. Gas concentrations are measured with a fast analyzer (Los Gatos Ultraportable Greenhouse Gas Analyzer) allowing to accurately record CH4 fluxes in the ppm range. We present preliminary results of the carbon flux variability from south Patagonian peat bogs and give insights into their environmental controls. Carbon fluxes of these two bog types appear to be highly different. In contrast to Sphagnum-dominated bogs, cushion plant-dominated bogs release almost no CH4 while their CO2 flux in both, photosynthesis and respiration, can be twice as high as for Sphagnum

  16. Difilobotriasis humana en la Patagonia, Argentina Human diphyllobothriasis in Patagonia, Argentina

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    Liliana Semenas

    1997-06-01

    Full Text Available OBJETIVO: El objetivo del trabajo fué detectar hospedadores humanos en la zona andino patagónica argentina, teniendo en cuenta las prácticas de pesca desportiva y la importancia de los salmónidos dentro de la zona. MATERIAL Y METODO: Entre 1986 y 1995 se implementaron Campañas de Información en los laboratorios de Análisis Clínicos de la región andinopatagónica argentina, destinadas a lograr una detección más eficiente de la difilobotriasis, a través de análisis coproparasitológicos. RESULTADOS: Adicionalmente, se confeccionaron planillas destinadas a recoger información sobre las características de la infección, del tratamiento y del paciente. Durante este período se detectaron 13 nuevos casos humanos, por identificación directa del parásito o por la presencia de huevos en materia fecal. Las características de las infecciones responden a las descriptas para el género Diphyllobothrium. CONCLUSIONES: En la región, los salmónidos son los peces predilectos en la pesca deportiva. Estos peces, frecuentemente parasitados con larvas, constituyen la principal fuente de contagio para el hombre al ser consumidos insuficientemente cocidos o ahumados en frío.OBJECTIVE: In view of the amateur fishing practices and the importance of salmonids in the region the study sets out to detect human hosts in the Andean-Patagonian zone. MATERIAL AND METHOD: Information campaigns were carried out by Clinical Analysis Laboratories of Andean Patagonia between 1986 and 1995 to detect diphyllobothriasis more efficiently by means of coproparasitological analysis. RESULTS: Further, forms were prepared for the collection of information about infection, treatment and the characteristics of the human host. During this period 13 new cases were registered either through direct identification of the parasite or through the presence of eggs in the faeces. The characteristics of infection are similar to those described for the genus Diphyllobothrium

  17. Resultados del relevamiento de HI en el Cielo Austral: 3. Relevamiento de Nubes de Alta Velocidad

    Science.gov (United States)

    Morras, R.; Bajaja, E.; Arnal, E. M.; Pöppel, W. G. L.

    Los resultados del relevamiento de HI del Hemisferio Austral fueron reprocesados con el fin de incrementar su sensibilidad. Así, se utilizó esta nueva base de datos con el fin de obtener un nuevo relevamiento de Nubes de Alta Velocidad en el cielo austral. El ruido r.m.s. alcanzado es de 0.015-0.020 K, con una resolución espectral de 8 km/seg. El cubrimiento espacial del relevamiento mejora en un factor 16 al realizado por Bajaja et al (1985).

  18. A new pentatomoid bug from the Ypresian of Patagonia, Argentina

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    Julián F. Petrulevičius

    2016-12-01

    Full Text Available A new pentatomoid heteropteran, Chinchekoala qunita gen. et sp. nov. is described from the lower Eocene of Laguna del Hunco, Patagonia, Argentina. The new genus is mainly characterised by cephalic characters such as the mandibular plates surpassing the clypeus and touching each other in dorsal view; head wider than long; and remarkable characters related to the eyes, which are surrounded antero-laterally and posteriorly by the anteocular processes and the pronotum, as well as they extend medially more than usual in the Pentatomoidea. This is the first pentatomoid from the Ypresian of Patagonia and the second from the Eocene in the region, being the unique two fossil pentatomoids in Argentina.

  19. Sequence stratigraphic analysis of Cenomanian greenhouse palaeosols: A case study from southern Patagonia, Argentina

    Science.gov (United States)

    Varela, Augusto N.; Veiga, Gonzalo D.; Poiré, Daniel G.

    2012-10-01

    The aim of this contribution is to analyse extrinsic (i.e., tectonics, climate and eustasy) and intrinsic (i.e., palaeotopography, palaeodrainage and relative sedimentation rates) factors that controlled palaeosol development in the Cenomanian Mata Amarilla Formation (Austral foreland basin, southwestern Patagonia, Argentina). Detailed sedimentological logs, facies analysis, pedofeatures and palaeosol horizon identification led to the definition of six pedotypes, which represent Histosols, acid sulphate Histosols, Vertisols, hydromorphic Vertisols, Inceptisols and vertic Alfisols. Small- and large-scale changes in palaeosol development were recognised throughout the units. Small-scale or high-frequency variations, identified within the middle section are represented by the lateral and vertical superimposition of Inceptisols, Vertisols and hydromorphic Vertisols. Lateral changes are interpreted as the result of intrinsic factors to the depositional systems, such as the relative position within the floodplain and the distance from the main channels, that condition the nature of parent material, the sedimentation rate and eventually the palaeotopographic position. Vertical stacking of different soil types is linked to avulsion processes and the relatively abrupt change in the distance to main channels as the system aggraded. The large-scale or low-frequency vertical variations in palaeosol type occurring in the Mata Amarilla Formation are related to long-term changes in depositional environments. The lower and upper sections of the studied logs are characterised by Histosols and acid sulphate Histosols, and few hydromorphic Vertisols associated with low-gradient coastal environments (i.e., lagoons, estuaries and distal fluvial systems). At the lower boundary of the middle section, a thick palaeosol succession composed of vertic Alfisols occurs. The rest of the middle section is characterised by Vertisols, hydromorphic Vertisols and Inceptisols occurring on distal and

  20. The impact of Chilean migration on employment in Patagonia.

    Science.gov (United States)

    Cariola Sanz, L

    1989-06-01

    This paper discusses the employment situation of Chilean migrant workers, their impact on labor markets in Patagonia, Argentina, and the government's past and projected responses to this phenomenon. In 1980, Chilean inhabitants of patagonia comprised 11% of the area's population. Chilean migration to patagonia was closely linked to economic activities that began to flourish in the 20th century, such as livestock raising, fruit and vegetable cultivation, and mining for coal and petroleum. No Chilean migrants work in a wide range of sectors. In Patagonia's southern provinces availability and ability to withstand rigorous climate conditions are the main factors which account for the prevalence of Chilean manpower. Chilean migrants do not in general displace local manpower. Legislation and the permeability of the border ensure that most workers enter the country as tourists. Clandestine migration is not an issue. Illegal migrants have provoked negative reactions for several reasons: 1) they comprise a marginal population without formal citizenship; 2) being employed as clandestine workers, they pay no social security, nor do their employers; 3) being illegal, they are obliged to accept lower wages and inferior working conditions which creates unfair competition within labor markets; and 4) as a result of these conditions, xenophobic and endophobic attitudes in relations with Argentine nationalists are reinforced. The government has attempted to solve these problems through various measures. Beginning in 1934, most foreigners entered Argentina with a tourist visa, becoming illegal when they stayed beyond authorized limits. Several measures over the years provided amnesty to illegal migrants. Currently, the law promotes immigration, monitors the admission of foreigners to the country and stipulates their rights and obligations. The law lists 115 articles on immigration promotion and on regulation of the movements of foreigners. Because of the present economic crisis in

  1. Scarsa visibilità in provincia. Nebbia laboratorio di cambiamento

    Directory of Open Access Journals (Sweden)

    Sebastiano Citroni

    2016-09-01

    Full Text Available Raramente oggetto d’attenzione esplicita, la categoria di provincia organizza implicitamente svariati discorsi e connota gli oggetti più vari da un punto di vista geografico, sociale e talvolta esistenziale. Recentemente, ad esempio, la provincia è stata una delle dimensioni centrali nei commenti sul voto in Gran Bretagna per la ‘Brexit’ e nelle analisi sull’ascesa di Donald Trump negli Stati Uniti. In entrambi i casi, infatti, è invocata una più adeguata comprensione dei territori di provincia di cui tali fenomeni sarebbero espressione.

  2. Biometric identification of capillariid eggs from archaeological sites in Patagonia.

    Science.gov (United States)

    Taglioretti, V; Fugassa, M H; Beltrame, M O; Sardella, N H

    2014-06-01

    Numerous eggs of capillariid nematodes have been found in coprolites from a wide range of hosts and in raptor pellets in archaeological samples from Patagonia. The structure and sculpture of the eggshell of these nematodes and their biometry are commonly used for identification. The aim of this study was to determine whether eggs of the genus Calodium with similar morphology, found in different archaeological samples from Patagonia, belong to the same species. For this purpose, capillariid eggs (N= 843) with thick walls and radial striations were studied by permutational multivariate analysis of variance (PERMANOVA). Eggs exhibiting similar shape and structure also showed similar biometry, regardless of the zoological origin of coprolites (P= 0.84), host diet (P= 0.19), character of the archaeological sites (P= 0.67) and chronology (P= 0.66). Thus, they were attributed to the same species. We suggest that an unidentified zoonotic species of the genus Calodium occurred in the digestive tract of a wide range of hosts in Patagonia during the Holocene and that both human and animal populations were exposed to this parasite during the Holocene in the study area.

  3. Primer registro de Naupactus ruizi (Coleoptera: Curculionoidea asociado con Pinus ponderosa (Gymnospermae: Pinaceae en Patagonia First record of Naupactus ruizi (Coleoptera: Curculionoidea associated to Pinus ponderosa (Gymnospermae: Pinaceae in Patagonia

    Directory of Open Access Journals (Sweden)

    Cecilia A. Gómez

    2006-07-01

    Full Text Available Naupactus ruizi (Brèthes es un gorgojo de rostro corto, distribuido en la Argentina y Chile, que habita en ambientes áridos asociado con vegetación xerofítica y alcanza el rango más austral entre los miembros de la tribu Naupactini. Un relevamiento de insectos y de patógenos como plagas potenciales, realizado durante el 2005 en plantaciones de Pinus spp. en la Patagonia andina argentina, resultó en el hallazgo de adultos de N. ruizi que se alimentaban de acículas de Pinus ponderosa Dougl. ex Laws. Este hallazgo es sorprendente dado que las especies de Naupactini, consumen casi exclusivamente angiospermas. Interpretamos que el cambio de huésped, habría ocurrido como consecuencia de una colonización reciente favorecida por la amplia distribución geográfica del gorgojo y su capacidad para sobrevivir en hábitats marginales, donde probablemente las plantas nativas son escasas y el nuevo huésped presenta una gran abundancia local.Naupactus ruizi (Brèthes is a broad-nosed weevil recorded from Argentina and Chile , that inhabits arid environments with xerophitic vegetation and reaches the southern most distribution of the tribe Naupactini. A survey of potential insect pests and pathogens of plantations of Pinus spp. and other forest species, conducted during 2005 in Argentinean Patagonian Andean forestations, allowed to find N. ruizi feeding on pine needles of Pinus ponderosa Dougl. ex Laws. This finding was unexpected, since species of Naupactini consume almost exclusively angiosperms. We interpret that the new host association may represent a recent host shift, probably facilitated by the broad range of the weevil, its capacity to survive in marginal habitats where natural hosts are scarce, and the local abundance of the new host.

  4. Bibliotecas escolares en la provincia de Valencia

    Directory of Open Access Journals (Sweden)

    García Ferrer, Josep

    2015-12-01

    Full Text Available Aproximadamente en el curso 2006-2007, la Conselleria de educación homogeneizó la gestión de las bibliotecas escolares de los centros de enseñanza públicos a ella adscritos. Durante los cursos 2010/2011 y 2011/2012 todos los centros de secundaria con bachillerato de la provincia de Valencia fueron invitados a participar en un estudio sobre el uso, gestión, fondos y servicios de las bibliotecas de sus centros. Este estudio presenta los resultados de este estudio, con datos recogidos de casi 150 centros: tanto in situ, mediante visita personalizada; como mediante contacto telemático, fuera este telefónico o a través de la cumplimentación de un cuestionario en línea. Este estudio puede servir de base comparativa para otros proyectos similares que puedan realizarse en un futuro.

  5. Rheum australe D. Don: A review of its botany, ethnobotany, phytochemistry and pharmacology

    Czech Academy of Sciences Publication Activity Database

    Rokaya, Maan Bahadur; Münzbergová, Zuzana; Tumsina, B.; Bhattarai, K. R.

    2012-01-01

    Roč. 141, č. 3 (2012), s. 761-774 ISSN 0378-8741 R&D Projects: GA ČR GA526/09/0549 Institutional support: RVO:67985939 Keywords : Rheum australe * traditional uses * phytochemistry Subject RIV: EF - Botanics Impact factor: 2.755, year: 2012

  6. Rheum australe D. Don: a review of its botany, ethnobotany, phytochemistry and pharmacology.

    Science.gov (United States)

    Rokaya, Maan Bahadur; Münzbergová, Zuzana; Timsina, Binu; Bhattarai, Krishna Ram

    2012-06-14

    Rheum australe D. Don (Polygonaceae) has been commonly used in traditional medicine for a wide range of ailments related to the circulatory, digestive, endocrine, respiratory and skeletal systems as well as to infectious diseases. To provide the up-to-date information that is available on the botany, traditional uses, phytochemistry, pharmacology and toxicology of Rheum australe. Additionally, to highlight the possible uses of this species to treat different diseases and to provide a basis for future research. The present review covers the literature available from 1980 to 2011. The information was collected from scientific journals, books, theses and reports via a library and electronic search (Google Scholar, Web of Science and ScienceDirect). Ethnomedical uses of Rheum australe have been recorded from China, India, Nepal and Pakistan for 57 different types of ailments. The phytochemical studies have shown the presence of many secondary metabolites belonging to anthraquinones, stilbenes, anthrones, oxantrone ethers and esters, chromones, flavonoids, carbohydrate, lignans, phenols and sterols. Crude extracts and isolated compounds from Rheum australe show a wide spectrum of pharmacological activities, such as antidiabetic, anti-inflammatory, antifungal, antimicrobial, antioxidant, anticancer, hepatoprotective and immune-enhancing activities, as well as a usefulness for improving renal function. Rheum australe has been widely used source of medicine for years without any adverse effects. Many studies have provided evidence for various traditional uses. However, there is a need for additional studies of the isolated compounds to validate the traditional uses in human models. The present review on the botany, traditional uses, phytochemistry and toxicity has provided preliminary information for further studies and commercial exploitations of the plant. Copyright © 2012 Elsevier Ireland Ltd. All rights reserved.

  7. Prioridades de conservación aplicando información filogenética y endemicidad: un ejemplo basado en Carabidae (Coleoptera de América del Sur austral Conservation priorities using phylogenetic information and endemicity: an example based on Carabid beetles from Southern South America

    Directory of Open Access Journals (Sweden)

    Sergio Roig-Juñent

    2004-12-01

    Full Text Available Sobre la base de la información distribucional de las especies de Carabidae (Coleoptera de América del Sur austral, se reconocieron 17 áreas de endemismo. Para cada una de ellas se estimó la diversidad gamma, el porcentaje de endemismo, el valor filogenético y la complementariedad, exceptuando Juan Fernández del cual no se pudo obtener ningún valor filogenético. El cálculo del valor filogenético se realizó a través del uso de cuatro índices, el valor filogenético sin ninguna modificación (W, considerando la endemicidad (We, y sus respectivas estandarizaciones (Ws y Wes. Los resultados muestran que la estandarización del valor filogenético (Ws produce un sesgo cuando los cladogramas difieren en tamaño y que el complemento entre áreas es una herramienta secundaria de gran utilidad. Sin embargo, los resultados muestran que para determinar la importancia de las áreas, el complemento debe ser usado en conjunto con la diversidad específica y la endemicidad. Las comparaciones de los resultados obtenidos usando W, We y análisis de complementariedad estrictos y modificados muestran que el valor filogenético que admite endemicidad (We puede ser aplicado como único valor para determinar la importancia de cada área. Aplicando We, las seis primeras áreas seleccionadas acumulan el 72 % del valor filogenético y el 74 % de la diversidad gamma de los carábidos de América del Sur austral, mientras que ninguno de los otros parámetros usados acumula el 70 % de las especies antes de sumar la séptima área. Las seis áreas seleccionadas son la Selva valdiviana, las Sierras pampeanas, Coquimbo, Patagonia occidental, Chile central y La Araucanía. Es de hacer notar que las Sierras pampeanas y la Patagonia occidental son ambientes de pastizales, Coquimbo y Chile central son ambientes áridos y semiáridos, y solo la Selva valdiviana y Araucanía son típicos bosques australesBased on information of the Southern South American carabid

  8. From Chilean Patagonia to Galapagos, Ecuador: novel insights on blue whale migratory pathways along the Eastern South Pacific

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    Rodrigo Hucke-Gaete

    2018-04-01

    Full Text Available Background The most traditional scheme for migration among baleen whales comprises yearly migrations between productive waters at high latitude summer feeding grounds and warmer waters at lower latitudes where whales calve and mate, but rarely feed. Evidence indicates, however, that large departures from this scheme exist among populations and individuals. Furthermore, for some populations there is virtually no information on migratory pathways and destinations. Such is the case of Chilean blue whales throughout the Eastern South Pacific; hence, the goal of this study was to assess its migratory behavior. Methods Dedicated marine surveys and satellite tagging efforts were undertaken during the austral summer and early autumn on blue whale feeding grounds off Chilean Northern Patagonia (CNP during 2013, 2015 and 2016. Positional data derived from satellite tags regarding movement patterns and behavior were analyzed using Bayesian switching first-difference correlated random walk models. Results We instrumented 10 CNP blue whales with satellite transmitters and documented individual variation in departure time, northbound migratory routes and potential wintering grounds. The onset of migration occurred from mid/late austral autumn to well into the austral winter. Blue whales moved in various directions, but ultimately converged toward a general NW movement direction along a wide corridor exceeding 2,000 km. Area-Restricted Search behavior was exhibited within fjords and channels of CNP and also South of Galapagos Archipelago (GA and northern Peru, but never during migration. Interestingly, dive profiles for one whale that reached GA showed a sharp and consistent increase in depth north of 5°S and extreme deep dives of up to 330 m. Discussion Information derived from satellite tagged blue whales in this study is the first of its kind off the Eastern Southern Pacific. Our results provide valuable information on their migratory timing, routes and

  9. The uranium potential of the continental Cretaceous of Patagonia

    International Nuclear Information System (INIS)

    Olsen, H.; Berizzo, J.

    1980-01-01

    The geological features of the fluvial sedimentation of the Cretaceous of Patagonia - the Grupo Chubut Formation in the provinces of Chubut and Santa Cruz, underlined this environment as one of high favourability for discovering uranium deposits. The area has been explored by the CNEA who found two outstanding levels of fluvial sediments that are today the target of further studies to find new deposits. The general geological features are given, together with the results of the exploration up to date, distribution of radiometric anomalies, deposits discovered and an estimation of the uraniferous potential of the Formation. (author)

  10. Variation in the proximate composition and fatty acid profile recovered from Argentine hake (Merluccius hubbsi waste from Patagonia

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    Cretton, M.

    2016-03-01

    Full Text Available The fish processing operations in Patagonia produce large amounts of waste. The main fishery resource in Argentina is the Argentine hake (Merluccius hubbsi. The ports of the province of Chubut (the most important of which are Puerto Madryn, Rawson and Comodoro Rivadavia, together with Caleta Paula Port (province of Santa Cruz, in the Argentine Patagonia, capture more than 82,000 tons of hake annualy, 80% of which are of M. hubbsi, which is mostly converted into fillets. From this capture, about 2,296 tons of liver would be available for the extraction of oil. To promote the recovery and industrial use of fish oil, in the present study, we determined the variation in the proximate composition and fatty acid profile of Argentine hake waste from the ports mentioned above at different catch times. Proximate composition was determined according of the Official Methods of Analysis (AOAC. Fatty acid profile was analyzed by gas chromatography of the fatty acid methyl esters (FAMEs. A standard mixture of FAMEs was run under identical conditions to identify the compounds on the basis of their retention times. Fatty acids were quantified using heptadecanoic acid (C17:0 as internal standard. The highest lipid recovery (27.0 to 41.8% of total lipids was obtained from the liver fraction. Palmitic acid (C16:0, oleic acid (18:1 n9, docosahexaenoic acid (22:6 n3, eicosapentaenoic acid (20:5 n3 and palmitoleic acid (16:1 were the main constituents. Protein levels in viscera without livers (V-L were higher than those in the liver. The extraction of marine fish oil and the production of fish offal meal from waste from fish factories would contribute to the sustainability of the regional industry, because it would also decrease the volume of waste, with benefits to the environment.El procesamiento de pescados en Patagonia produce gran cantidad de residuos. El recurso de pesca más importante en la Argentina es la merluza argentina (Merluccius hubbsi. En Patagonia

  11. Checklist of the Discomycetes (Fungi of Patagonia, Tierra del Fuego and adjacent antarctic areas

    Directory of Open Access Journals (Sweden)

    Irma J. Gamundí

    2004-01-01

    Full Text Available La información brindada en este catálogo consiste en registrar las especies de hongos pertenecientes a los órdenes Cyttariales, Helotiales, Ostropales, Pezizales, Rhytismatales y Thelebolales (Discomycetes coleccionadas en Patagonia, Tierra del Fuego y áreas adyacentes antárticas (Patagonia. Además datos sobre sus organismos asociados fueron localizados, resumidos, validados y editados. Las fuentes de información fueron las exsiccatae depositadas en colecciones de Argentina y otros países y de las publicaciones listadas en la bibliografía. Otros registros derivaron de observaciones de campo sobre material fresco y colecciones de referencia. La información fue acumulada en un sistema computarizado relacional de datos taxonómicos, nomenclaturales, bibliográficos, de distribución geográfica y de observaciones biológicas. Este sistema permite la acumulación de datos paralelos en diferentes idiomas, y distingue la información original de la opinión corriente de lo que puede significar esa información. En la Biological Records Database, 5029 registros fueron creados para observaciones sobre la ocurrencia temporal y espacial de los organismos vivos de la región. De éstos, 2613 corresponden a registros de colecciones de Discomycetes de la Patagonia y Tierra del Fuego, con la siguiente distribución: 1854 para a la Argentina, 687 para Chile y 72 para áreas adyacentes antárticas. Excluyendo los sinónimos, los Discomycetes están representados por 361 especies y taxones subespecíficos (160 géneros, 22 familias y 7 órdenes. Los registros remanentes fueron de organismos asociados con los Discomycetes: 163 animales (8 especies, 8 géneros, 6 familias y 5 órdenes; 2 Chromista; 223 hongos (52 especies, 54 géneros, 26 familias y 13 ódenes; 2028 plantas (159 especies, 122 géneros, 59 familias y 39 órdenes. Cada uno de estos taxones (y cada sinónimo conocido está representado por un registro separado en la Base de Datos Taxon

  12. MIGRATION PATTERNS, USE OF STOPOVER AREAS, AND AUSTRAL SUMMER MOVEMENTS OF SWAINSON’S HAWKS

    Science.gov (United States)

    Kochert, Michael N.; Fuller, Mark R.; Schueck, Linda S.; Bond, Laura; Bechard, Marc J.; Woodbridge, Brian; Holroyd, Geoff; Martell, Mark; Banasch, Ursula

    2015-01-01

    From 1995–1998, we tracked movements of adult Swainson’s Hawks (Buteo swainsoni) using satellite telemetry to characterize migration, important stopover areas, and austral summer movements. We tagged 46 hawks from July - September on their nesting grounds in seven U.S. states and two Canadian provinces. Swainson’s Hawks basically followed three routes south on a broad front, converged along the east coast of central Mexico, and followed a concentrated corridor to a communal austral summer area in central Argentina. North of 20° N, southward and northward tracks differed little for individuals from east of the Continental Divide but differed greatly (up to 1700 km) for individuals from west of the Continental Divide. Hawks left the breeding grounds mid-August to mid-October; departure dates did not differ by location, year, or sex. South migration lasted 42 to 98 days, and north migration took 51 to 82 days. On south migration, 36% of the Swainson’s Hawks departed the nesting grounds nearly 3 weeks earlier than the other radio marked hawks and made stopovers 9.0 – 26.0 days long in seven separate areas, mainly in the southern Great Plains, southern Arizona and New Mexico, and north-central Mexico. The austral period lasted 76 to 128 days. All Swainson’s Hawks used a core area in central Argentina within 23% of the 738800 km2 austral summer range where they frequently moved long distances (up to 1600 km). Conservation of Swainson’s Hawks must be an international effort that considers habitats used during nesting and non-nesting seasons including migration stopovers. PMID:26380528

  13. MIGRATION PATTERNS, USE OF STOPOVER AREAS, AND AUSTRAL SUMMER MOVEMENTS OF SWAINSON'S HAWKS.

    Science.gov (United States)

    Kochert, Michael N; Fuller, Mark R; Schueck, Linda S; Bond, Laura; Bechard, Marc J; Woodbridge, Brian; Holroyd, Geoff; Martell, Mark; Banasch, Ursula

    From 1995-1998, we tracked movements of adult Swainson's Hawks ( Buteo swainsoni ) using satellite telemetry to characterize migration, important stopover areas, and austral summer movements. We tagged 46 hawks from July - September on their nesting grounds in seven U.S. states and two Canadian provinces. Swainson's Hawks basically followed three routes south on a broad front, converged along the east coast of central Mexico, and followed a concentrated corridor to a communal austral summer area in central Argentina. North of 20° N, southward and northward tracks differed little for individuals from east of the Continental Divide but differed greatly (up to 1700 km) for individuals from west of the Continental Divide. Hawks left the breeding grounds mid-August to mid-October; departure dates did not differ by location, year, or sex. South migration lasted 42 to 98 days, and north migration took 51 to 82 days. On south migration, 36% of the Swainson's Hawks departed the nesting grounds nearly 3 weeks earlier than the other radio marked hawks and made stopovers 9.0 - 26.0 days long in seven separate areas, mainly in the southern Great Plains, southern Arizona and New Mexico, and north-central Mexico. The austral period lasted 76 to 128 days. All Swainson's Hawks used a core area in central Argentina within 23% of the 738800 km 2 austral summer range where they frequently moved long distances (up to 1600 km). Conservation of Swainson's Hawks must be an international effort that considers habitats used during nesting and non-nesting seasons including migration stopovers.

  14. Mesoscale variability in the Bransfield Strait region (Antarctica during Austral summer

    Directory of Open Access Journals (Sweden)

    M. A. García

    1994-08-01

    Full Text Available The Bransfield Strait is one the best-known areas of Antarctica's oceanic surroundings. In spite of this, the study of the mesoscale variability of its local circulation has been addressed only recently. This paper focuses on the mesoscale structure of local physical oceanographic conditions in the Bransfield Strait during the Austral summer as derived from the BIOANTAR 93 cruise and auxiliary remote sensing data. Moreover, data recovered from moored current meters allow identification of transient mesoscale phenomena.

  15. Effectiveness of aqueous and hydroalcoholic extracts of Acanthospermum australe (Loefl. Kuntze against diarrhea-inducing bacteria

    Directory of Open Access Journals (Sweden)

    R. Mallmann

    2018-01-01

    Full Text Available Abstract Leaves and roots of Acanthospermum australe (Asteraceae have been used in Brazilian folk medicine for the treatment of various ailments including diarrhea, skin diseases, blennorrhagia, dyspepsia, parasitic worms and malaria. The aim of study was to characterize the chemical profiles of the aqueous and hydroalcoholic extracts of leaves and roots of A. australe, and to evaluate their antimicrobial activities against diarrhea-inducing bacteria (Enterococcus faecalis, Shigella dysenteriae and Yersinia enterocolitica, as well as their cytotoxic properties. Aqueous leaf extracts were obtained by infusion, while aqueous root extracts were obtained by decoction. The hydroalcoholic leaf and root extracts were prepared by maceration in 90% ethanol for 3 days. Antimicrobial activity was assessed using standard techniques and cytotoxicity was evaluated using Chinese hamster ovary cells CHO-K1. Chemical analysis revealed the presence of tannins, flavonoids, saponins and phenolic compounds in the extracts. Although root extracts were not effective against E. faecalis, leaf extracts at concentrations of 20 mg/mL exhibited bactericidal activities against this microorganism. The hydroalcoholic root extract was unique in presenting a bactericidal effect against S. dysenteriae. None of the extracts showed bacteriostatic or bactericidal activities against Y. enterocolitica. The results presented herein demonstrate that the Gram-positive E. faecalis and the Gram-negative S. dysenteriae were susceptible to A. australe extracts, although bacteriostatic/bactericidal activities were only observed at concentrations considered too high for clinical application. Our results support the ethnopharmacological use of A. australe in the treatment of gastrointestinal disorders, particularly diarrhea caused by infectious bacteria, although further studies are required to determine the anti-diarrhea effects and the toxicities of the extracts in vivo.

  16. Biometría del esqueleto postcraneal en muestras del Holoceno tardío de la Cuenca del Lago Salitroso (provincia de Santa Cruz

    Directory of Open Access Journals (Sweden)

    Barrientos, Gustavo

    2001-01-01

    Full Text Available El objetivo de la presente comunicación es presentar la información osteométrica correspondiente al esqueleto postcraneal de una muestra de 18 individuos adultos de diferente sexo y edad, provenientes la cuenca del lago Salitroso (N.O. de la provincia de Santa Cruz. Los mismos fueron recuperados a partir de la excavación de chenques y hoquedades naturales sobre roca, con un rango de edades radiocarbónicas situado entre ca. 2500 y 300 años AP. El presente estudio se integra a una investigación de mayores alcances orientada a analizar la evolución de las poblaciones humanas del centro-sur de la Patagonia continental durante el Holoceno tardío. En este estudio se consideraron 45 variables métricas correspondientes a 10 unidades anatómicas del esqueleto postcraneano (húmero, radio, cúbito, clavícula, fémur, tibia, peroné, escápula, sacro y coxal. A nivel de la localidad, se establecieron comparaciones basadas en análisis uni y multivariados entre el conjunto de entierros más antiguo (ca. 2500-1800 años AP con el más reciente (ca. 1000-300 años AP, con la finalidad de detectar diferencias significativas entre ambas submuestras cronológicas. Finalmente, se analizaron los datos regionales en relación con la variabilidad registrada en otras muestras de Patagonia continental (Chubut y sur de Santa Cruz y Tierra del Fuego.

  17. Late Cretaceous Aquatic Plant World in Patagonia, Argentina

    Science.gov (United States)

    Cúneo, N. Rubén; Gandolfo, María A.; Zamaloa, María C.; Hermsen, Elizabeth

    2014-01-01

    In this contribution, we describe latest Cretaceous aquatic plant communities from the La Colonia Formation, Patagonia, Argentina, based on their taxonomic components and paleoecological attributes. The La Colonia Formation is a geological unit deposited during a Maastrichtian-Danian transgressive episode of the South Atlantic Ocean. This event resulted in the deposition of a series of fine-grained sediments associated with lagoon systems occurring along irregular coastal plains in northern Patagonia. These deposits preserved a diverse biota, including aquatic and terrestrial plants and animals. The aquatic macrophytes can be broadly divided into two groups: free-floating and rooted, the latter with emergent or floating leaves. Free-floating macrophytes include ferns in Salviniaceae (Azolla and Paleoazolla) and a monocot (Araceae). Floating microphytes include green algae (Botryoccocus, Pediastrum and Zygnemataceae). Among the rooted components, marsileaceous water ferns (including Regnellidium and an extinct form) and the eudicot angiosperm Nelumbo (Nelumbonaceae) are the dominant groups. Terrestrial plants occurring in the vegetation surrounding the lagoons include monocots (palms and Typhaceae), ferns with affinities to Dicksoniaceae, conifers, and dicots. A reconstruction of the aquatic plant paleocommuniy is provided based on the distribution of the fossils along a freshwater horizon within the La Colonia Formation. This contribution constitutes the first reconstruction of a Cretaceous aquatic habitat for southern South America. PMID:25148081

  18. Late cretaceous aquatic plant world in Patagonia, Argentina.

    Directory of Open Access Journals (Sweden)

    N Rubén Cúneo

    Full Text Available In this contribution, we describe latest Cretaceous aquatic plant communities from the La Colonia Formation, Patagonia, Argentina, based on their taxonomic components and paleoecological attributes. The La Colonia Formation is a geological unit deposited during a Maastrichtian-Danian transgressive episode of the South Atlantic Ocean. This event resulted in the deposition of a series of fine-grained sediments associated with lagoon systems occurring along irregular coastal plains in northern Patagonia. These deposits preserved a diverse biota, including aquatic and terrestrial plants and animals. The aquatic macrophytes can be broadly divided into two groups: free-floating and rooted, the latter with emergent or floating leaves. Free-floating macrophytes include ferns in Salviniaceae (Azolla and Paleoazolla and a monocot (Araceae. Floating microphytes include green algae (Botryoccocus, Pediastrum and Zygnemataceae. Among the rooted components, marsileaceous water ferns (including Regnellidium and an extinct form and the eudicot angiosperm Nelumbo (Nelumbonaceae are the dominant groups. Terrestrial plants occurring in the vegetation surrounding the lagoons include monocots (palms and Typhaceae, ferns with affinities to Dicksoniaceae, conifers, and dicots. A reconstruction of the aquatic plant paleocommuniy is provided based on the distribution of the fossils along a freshwater horizon within the La Colonia Formation. This contribution constitutes the first reconstruction of a Cretaceous aquatic habitat for southern South America.

  19. Desarrollo de un proyecto agrícola en la región marginal de la Patagonia Meridional Argentina. El caso de Gobernador Gregores

    Directory of Open Access Journals (Sweden)

    María Eugenia Cepparo de Grosso

    2012-02-01

    Full Text Available Santa Cruz, provincia ubicada en el extremo sur del territorio continental argentino, posee un ambiente fuertemente condicionado por la fragilidad de sus características naturales y una situación socioeconómica tradicionalmente orientada a la monoactividad ganadera en el área rural y a los servicios públicos en los centros urbanos. En ese marco, y durante la década de 1990, surgió una iniciativa apoyada por organismos del Estado y financiada por bancos provinciales para estimular un proyecto agrícola adaptado a las limitadas aptitudes agrícolas de la región. Un reducido número de agricultores, inquietos por generar actividades que diversificaran el tradicional modelo pastoril, experimentaron los dilemas de los comienzos y las crisis de un proyecto de estímulo económico en un territorio marginal. Este trabajo contribuye con una serie de reflexiones acerca de las motivaciones que justifican el estudio de pequeñas sociedades en áreas marginales; de la confrontación entre el marco conceptual de la marginalidad según los países centrales y los periféricos; y del accionar y el compromiso de los actores sociales motivados por una alternativa de desarrollo local en una localidad ubicada en el centro de la Patagonia Meridional Argentina.

  20. LAS NORMAS JURÍDICAS Y LAS POLÍTICAS PÚBLICAS SOBRE BOSQUES CULTIVADOS EN LAS REGIONES DEL CENTRO Y DE PATAGONIA EN ARGENTINA

    Directory of Open Access Journals (Sweden)

    C. M. MINAVERRY

    2017-08-01

    Full Text Available El eje central de este trabajo es analizar el nivel de desarrollo de las normas jurídicas, de las políticas públicas, y de la idoneidad de las autoridades de aplicación sobre bosques cultivados, en las regiones del Centro y de la Patagonia en Argentina. Se trata de una investigación de carácter exploratorio, donde se aplicó el método de la hermenéutica jurídica y los indicadores ambientales PER. Se puede concluir que los niveles de desarrollo normativo de las provincias no son uniformes, y que la mayoría de las normas jurídicas y de las políticas públicas tienden a establecer incentivos económicos para aprovechar el efecto del mercado, sin orientarse hacia una protección integral de los ecosistemas boscosos, y que las autoridades de aplicación en su mayoría no son técnicamente adecuadas para eso.

  1. New records of water mites (Acari: Hydrachnidia, Halacaroidea) from Patagonia (Chile)

    NARCIS (Netherlands)

    Pešić, V.; Smit, H.; Datry, T.

    2010-01-01

    New records of water mite species (Acari: Hydrachnidia, Halacaroidea) from Patagonia (Southern Chile) are reported. Four species, Anisitsiellides australis Smit, 2002, Peregrinacarus falklandensis Bartsch, 2001, Lobohalacarus weberi (Romijn & Viets, 1924) and Soldanellonyx monardi Walter, 1919 are

  2. Fe-Ni Micrometorites from Upper Jurassic Cañadon Asfalto Fm., Patagonia, Argentina

    Science.gov (United States)

    Matteini, M.; Hauser, N.; Cabaleri, N.; Silva Nieto, D.; Cuadros, F. A.; Reyes, S.

    2014-09-01

    Microspherules from an upper Jurassic sediments from Patagonia, show mineralogical, geochemical and textural features very similar to those reported for I-type micrometeorites whereas some spherules are interpreted as typical G-type micrometeorites.

  3. GRABADOS RUPESTRES EN EL SUR DE LA PROVINCIA DE LUGO

    Directory of Open Access Journals (Sweden)

    Begoña González Aguiar

    2011-10-01

    Full Text Available En este artículo se plasman los resultados obtenidos tras el estudio de cincuenta estaciones rupestres ubicadas, todas ellas, en el sur de la provincia de Lugo. En un primer momento se llevaron a cabo labores de prospección y análisis de las estaciones, para su posterior estudio descriptivo, simbólico y espacial. Tales trabajos confirman la existencia de representaciones en una “zona marginada” como es la provincia de Lugo, frente a Pontevedra y A Coruña. Además, se han catalogado veinte estaciones inéditas, desconocidas hasta la fecha.

  4. Planeamiento estratégico para la Provincia de Tarata

    OpenAIRE

    Absi Lizárraga, Jadiye Gloria; Calizaya Yufra, Juan Vianey; Ramírez Izaguirre, Miguel Ángel

    2017-01-01

    La provincia de Tarata se encuentra localizada al sur del Perú, específicamente en la región Tacna. Posee más de 7,000 habitantes, de los cuales solo la mitad ha culminado la secundaria. La actividad económica más importante de la provincia es la agricultura, destacando en la producción de orégano que no solo abastece el mercado local, sino que se exporta. Adicionalmente, se desarrollan proyectos mineros y algunas actividades turísticas incipientes. De acuerdo al modelo esta...

  5. Planeamiento estratégico para la Provincia de Piura

    OpenAIRE

    Cóndor Tanta, Sandra Diana; Fernández Essenwanger, Emérito Gustavo; Mejía García, Jorge Enrique; Minaya Serna, Sandra Evelyn

    2017-01-01

    xv, 167 h. : il. ; 30 cm. Este planeamiento estratégico para la provincia de Piura (2016-2026) se elaboró siguiendo la metodología del Modelo Secuencial del Proceso Estratégico de D’Alessio (2015). La provincia de Piura, ubicada en la región del mismo nombre, en el norte del Perú, presenta debilidades: alta informalidad en sus unidades empresariales y un gobierno sin apoyo de la población. Estas debilidades se confrontan con fortalezas como gran cantidad de recursos naturales, y producción...

  6. El feminicidio en la provincia de Huancayo 2012-2013

    OpenAIRE

    Trucios, Jenny; Uribe, Marilu; Rosas, Miryam

    2016-01-01

    La investigación estableció como problema de estudio ¿Cómo influyen la discriminación de género, la violencia familiar y el machismo en el feminicidio en mujeres de la provincia de Huancayo? Por lo que se planteó como objetivo: Conocer cómo influye la discriminación de género, la violencia familiar y el machismo en el feminicidio en mujeres de la provincia de Huancayo. Esta investigación considera como hipótesis: La discriminación de género, violencia familiar y el machismo influyen de man...

  7. Green marketing impact on a company’s success : studying the case of Patagonia

    OpenAIRE

    Ventura, Manuel Robles Machado Simões

    2016-01-01

    The increased demand for products with low environmental impact has increased the number of green marketing campaigns released during the last years. However, the impact of green marketing in companies’ performance is not clear. It mainly depends on the company’s characteristics and the perceived honesty of their green claims. Thus, the present study aimed to analyze the impact of green marketing in a particular company, Patagonia. Patagonia is recognized as a pioneer in corporate environment...

  8. Latest Pleistocene and Holocene Glacier Fluctuations in southernmost Patagonia

    Science.gov (United States)

    Menounos, B.; Maurer, M.; Clague, J. J.; osborn, G.; Ponce, F.; Davis, P. T.; Rabassa, J.; Coronato, A.; Marr, R.

    2011-12-01

    Summer insolation has been proposed to explain long-term glacier fluctuations during the Holocene. If correct, the record of glacier fluctuations at high latitudes in the Southern Hemisphere should differ from that in the Northern Hemisphere. Testing this insolation hypothesis has been hampered by dating uncertainties of many Holocene glacier chronologies from Patagonia. We report on our ongoing research aimed at developing a regional glacier chronology at the southern end of the Andes north and west of Ushuaia, Argentina. We have found evidence for an advance of cirque glaciers at the end of the Pleistocene; one or locally two closely spaced moraines extend up to 2 km beyond Little Ice Age moraines. Radiocarbon dating of terrestrial macrofossils recovered from basal sediments behind two of these moraines yielded ages of 10,320 ± 25 and 10,330 ± 30 14C yr BP. These moraines may record glacier advances coeval with the Antarctic Cold Reversal; surface exposure dating of these moraines is currently in progress to test this hypothesis. We find no evidence of Holocene moraines older than 6800 14C yr BP, based on the distribution of Hudson tephra of that age. At some sites, there is evidence for an early Neoglacial advance of glaciers slightly beyond (Peru. We have documented multiple wood mats with stumps in growth position separated by till units in a 100 m section of the northeast lateral moraine at Stoppani Glacier (54.78 S, 68.98 W), 50 km west of Ushuaia. Ten radiocarbon ages on these wood mats range in age from 3510 ± 15 to 135 ± 15 14C yr BP. The mats decrease in age up-section; many overlap with published age ranges for Neoglacial advances in western Canada. Taken together, these data: a) do not support the summer insolation hypothesis for Holocene glacier fluctuations in southernmost Patagonia; b) confirm paleobotanical evidence for a warm, dry early Holocene; and c) suggest that many Neoglacial advances in southernmost Patagonia and western North America

  9. Abutilon ornamental (Abutilon sp. - Malvaceae mostrando pústulas de Synchytrium australe Pustules on stems, leaves and pods of ornamental abutilon (Abutilon sp. caused by Synchytrium australe

    Directory of Open Access Journals (Sweden)

    Mário Barreto Figueiredo

    2007-06-01

    Full Text Available Plantas de abutilon recebidas para análise fitopatológica pelo Instituto Biológico, São Paulo, Brasil mostrando como sintomas pústulas semelhantes a ferrugem (Uredinales sobre folhas e caule foram estudadas para determinar o agente causal. Numerosos esporângios amarelos característicos de fungos zoospóricos pertencentes à Ordem Chytridiales foram encontrados no interior de galhas superficiais. Com base no estudo de KARLING (1955, o patógeno foi identificado como Synchytrium australe Speg. O material foi herborizado e armazenado no Herbário Micológico do Instituto Biológico sob o número IBI/SP 11975. Esta foi a primeira constatação desta espécie no Brasil.The genus Abutilon includes a large number of ornamental species with nice foliage and flowers. The different species are known under several common names as Indian mallow, China jute, butterprint, etc. Plants of abutilon received for phytopathological analysis by the Instituto Biologico, São Paulo, Brazil showing curious rust like symptoms (pustules on leaves, stems and pods were studied to determine the causal agent. Numerous yellow sporangia characteristic of zoosporic fungi belonging to the Order Chytridiales were found within the superficial intact galls. Based on KARLING (1955 paper the pathogen was identified as Synchytrium australe Speg. The voucher material was saved and settled in the Mycological Herbarium of the Institution under the number IBI/SP 11975. This was the first report of the occurrence of this species in Brazil.

  10. Saturación del carbonato de calcio en un área de cultivo de mitílidos en el Seno Reloncaví, Patagonia norte, Chile

    Directory of Open Access Journals (Sweden)

    Emilio Alarcón

    2015-05-01

    Full Text Available Se realizaron mediciones de temperatura, salinidad, alcalinidad total y carbono inorgánico disuelto del agua de mar superficial dentro de un área dedicada a la producción de semillas de mitílidos en el Seno de Reloncaví, Patagonia norte, durante el otoño (mayo 2012 y el verano austral (enero 2013. Se determinó que el estado de saturación del carbonato de calcio (ΩCaCO3 dentro del área de estudio fue bajo (Ωaragonita < 2, inclusive con aguas superficiales "corrosivas" para el CaCO3 (i.e., aguas subsaturadas, Ω < 1, cuando aguas de baja salinidad (<28 y alcalinidad total (<1.800 μmol kg-1 fueron advectadas dentro del centro de producción en mayo de 2012. En enero 2013 la baja salinidad (<25 fue asociada a aguas de baja alcalinidad total (ca. 1700 μmol kg-1 provocando bajos niveles de Ωaragonita en aguas superficiales equilibradas totalmente con la atmósfera (i.e., 400 μatm. Así, se sugiere que eventos corrosivos para el CaCO3 (i.e., aguas subsaturads Ω < 1 pueden ser una condición frecuente en esta área de producción de mitílidos en la Patagonia norte. La potencial disminución en productividad de Mytilus chilensis asociados a la acidificación del océano (AO recientemente descrita por Navarro et al. (2013 y la detección de aguas corrosivas para el carbonato de calcio encontradas, sugieren la necesidad de incluir el monitoreo regular del sistema carbonatos como una variable clave para la evaluación de la capacidad de carga de este sistema de aguas interiores.

  11. Mercury in lichens of Nahuel Huapi National Park, Patagonia, Argentina

    International Nuclear Information System (INIS)

    Ribeiro Guevara, S.; Bubach, D.; Arribere, M.; Nacional de Cuyo Universidad, Bariloche

    2004-01-01

    Mercury and other elements of interest are determined in lichens collected in Nahuel Huapi National Park, Northern Patagonia, Argentina. Pooled samples are analyzed by instrumental neutron activation analysis. Mercury contents in Usnea sp. collected from undisturbed sites range from 0.0558 ± 0.0083 to 1.38 ± 0.18 μg x g -1 . Other potential pollutants are identified by the analysis of Usnea sp. samples, namely Sb, As, Br, Zn, and Se. Previous experiments with foliose and fruticose lichens are also discussed. The analysis of mercury contents of foliose lichens sampled from urban and periurban sites of Bariloche city, and from undisturbed regions, demonstrate that the atmosphere of Bariloche city is enriched in mercury compared to the surroundings. The result is confirmed by transplantation experiments from undisturbed zones to urban sites. (author)

  12. Desarrollo humano sostenible en la provincia de Palencia

    OpenAIRE

    Egido Pérez, María Nieves del

    2014-01-01

    El presente trabajo pretende hacer un estudio estadístico de la provincia de Palencia, conforme al índice de desarrollo humano sostenible con el análisis de las variables que componen el IDH –Salud, educación y renta- Grado en Relaciones Laborales y Recursos Humanos

  13. Leptospirosis en la provincia de Cienfuegos

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    Rubén Bembibre Taboada

    2000-08-01

    Full Text Available La leptospirosis es una enfermedad infecciosa que constituye un problema de salud no erradicado. Se realizó un estudio descriptivo retrospectivo de la totalidad de los pacientes afectados por leptospirosis en el año 1998 en la provincia de Cienfuegos. Los datos primarios se obtuvieron del registro del Centro Provincial de Higiene y Epidemiología (CPHE procediéndose a la aplicación de encuesta para obtener datos de interés como: sexo, edad, municipio de residencia, ocupación, fuente de infección, vacunación previa, evolución, necesidad de ingreso, y seguimiento por el Médico de la Familia, teniendo como objetivo determinar el comportamiento de la entidad en el período estudiado y el rol del Médico de la Familia. Los datos fueron procesados por sistema EXCEL de Windows y los principales resultados se exponen en figuras diseñadas por Power Point. Se constató la disminución de la morbilidad por esta afección en la provincia respecto al año 1997 en 33,3 %, la letalidad fue de 0 y existió un predominio del sexo masculino con 40 casos, y del grupo etáreo de 25 a 44 años con el 70 %. La mayor incidencia correspondió al municipio Palmira. Ninguno de los enfermos había sido inmunizado con la vacuna cubana antileptospírica. Los ingresos domiciliarios se realizaron en el 77 % de los casos con evolución favorable, demostrándose la efectividad en la atención a nivel primario y el papel del Médico de la Familia tanto en la labor preventiva como curativa. La seroconversión y el aumento del título fueron las principales pruebas de confirmación de 45 y 41 % respectivamente, aún existen índices de roedores no despreciables en el territorio provincial. La labor del Médico y Enfermera de la Familia puede ser eficaz en el control de la leptospirosis con la minimización de sus perjudiciales consecuenciasLeptospirosis is an infectious disease and a health problem that has not been erradicated yet. A descriptive and retrospective study

  14. Marine fronts at the continental shelves of austral South America - Physical and ecological processes

    Science.gov (United States)

    Acha, Eduardo M.; Mianzan, Hermes W.; Guerrero, Raúl A.; Favero, Marco; Bava, José

    2004-01-01

    Neritic fronts are very abundant in austral South America, covering several scales of space and time. However, this region is poorly studied from a systemic point of view. Our main goal is to develop a holistic view of physical and ecological patterns and processes at austral South America, regarding frontal arrangements. Satellite information (sea surface temperature and chlorophyll concentration), and historical hydrographic data were employed to show fronts. We compiled all existing evidence (physical and biological) about fronts to identify regions defined by similar types of coastal fronts and to characterize them. Fronts in austral South America can be arranged in six zones according to their location, main forcing, key physical variables, seasonality, and enrichment mechanisms. Four zones, the Atlantic upwelling zone; the temperate estuarine zone; the Patagonian tidal zone and the Argentine shelf-break zone, occupy most of the Atlantic side. The Chile-Peru upwelling zone, on the Pacific, is the largest and best-known region. The Patagonian cold estuarine zone encompasses the tip of South America, connecting the Pacific and Atlantic oceans, and remains poorly studied. When observed at a continental scale, the Pacific coast dominated by two large frontal zones appears simplest than the Atlantic coast in terms of frontal richness. The extension of the continental shelf in the Atlantic coast allows for the development of a great diversity of mesoscale fronts. Though frontal zones we defined are extensive areas of the continental shelves, fronts inside the zones are comparatively small areas. Even so, they play a paramount role in ecological processes, allowing for high biological production; offering feeding and/or reproductive habitats for fishes, squids, and birds; acting as retention areas for larvae of benthic species; and promoting establishment of benthic invertebrates that benefit from the organic production in the frontal area.

  15. Diplodon shells from Northwest Patagonia as continental proxy archives: Oxygen isotopic results and sclerochronological analyses

    Science.gov (United States)

    Soldati, A. L.; Beierlein, L.; Jacob, D. E.

    2009-04-01

    precipitation records in the region (from the NOAA database, station: airport of S.C. de Bariloche: 41°S-71°W). D. ch. patagonicus exhibit very well developed annual growth lines, which allow calibrating a precise temporal scale with calendar years in the shell (Soldati et al., 2008). Extremely wide increments (e.g. years 2000-2001 and 1978-1979), related to distinct periods (so-called benchmark increments) are present in all specimens and can be used to anchor the growth curves in order to create a master curve for the lake. ^18Oshell varies seasonally, presenting minima during the warm season (November/March) and maxima in the austral autumn/winter (April/October), reproducing the temperature fluctuations in the region. The resolution of the ^18Oshell measurement varies for each year: samples obtained from larger annual increments (>1 mm, generally mussels younger than 10 years old) allow a resolution of ca. 2 months (5-7 samples per year), and sometimes even give a 5 weeks resolution, while thinner annual increments (between 1 and 0.1 mm, generally older than 10 years) allow only a 4-6 month resolution (2-3 points per sampled year). Because of their long live span of ca. 100 years, Diplodon shells are useful to construct an accurate climatological archive for Patagonia with time windows of around a century, resolving the environmental signal annually and even seasonally. References: CASTELLANOS Z.A. (1960). Almejas nacaríferas de la República Argentina. Género Diplodon. Secretaría de Agricultura, Publicación Miscelánea, 421: 1-40. KAANDORP R.J.G., VONHOF H.B., WESSELINGH F.P., PITTMAN L.R., KROON D. & HINTE J.E.V. (2005). Seasonal Amazonian rainfall variation in the Miocene Climate Optimum. Palaeogeography, Palaeoclimatology, Palaeoecology, 221: 1-6. SOLDATI A.L., JACOB D.E., SCHÖNE B.R., BIANCHI M.M., HAJDUK A. (2008). Seasonal periodicity of growth and composition in valves of Diplodon chilensis patagonicus (D'Orbigny, 1835). Journal of Molluscan Studies, doi:10

  16. Leaf venation pattern to recognize austral South American medicinal species of "cow's hoof" (Bauhinia L., Fabaceae

    Directory of Open Access Journals (Sweden)

    Renée H. Fortunato

    Full Text Available ABSTRACT The leaves extracts of some species of Bauhinia L. s.l. are consumed to treat diabetes, inflammation, pains and several disorders in traditional medicine in austral South America. Despite its wide use and commercialization, sale is not controlled, and botanical quality of samples is not always adequate because of plant misidentification and adulteration. Here, we characterized leaf vein pattern in nineteen taxa to contribute to the recognition and commercial quality control of plant material commercially available. The vein characters intercostal tertiary and quinternary vein fabric, areole development and shape, free ending veinlet branching and marginal ultimate venation allowed to distinguish the main medicinal species in the region.

  17. Composition of phytoplankton in the Bransfield Strait and Elephant Island during austral summer of 1999

    Directory of Open Access Journals (Sweden)

    Sonia Sánchez

    2014-06-01

    Full Text Available The authors inform about the composition and distribution of phytoplanktonic community between the first 75 m of depth in Bransfield Strait y around the Elephant island, during the ANTAR X expedition in the 1999 Austral Summer (22nd–29th January 1999. The higher cellular concentration (500 cel/mL was given by the autotrophic nanoplankton, with a high density mainly on the bay stations and down the first 25 m of depth. Among the most representative species we have Leucocryptos marina, Phaeocystis antarctica, the Monadas and the pennate diatoms.

  18. DNA-damaging activity of a cinnamate derivative and further compounds from Cinnamomum australe (Lauraceae)

    International Nuclear Information System (INIS)

    Carbonezi, Carlos Alberto; Lopes, Marcia Nasser; Silva, Dulce Helena Siqueira; Araujo, Angela Regina; Bolzani, Vanderlan da Silva; Young, Maria Claudia Marx; Silva, Marcelo Rogerio da

    2004-01-01

    The bioactive compound trans-3'-methylsulphonylallyl trans-cinnamate (1) along with the inactive iryelliptin (2) and (7R,8S,1'S)-Δ 8' -3',5'-dimethoxy-1',4'-dihydro-4'-oxo-7.0.2',8.1'-neolignan (3) were isolated from the leaves of Cinnamomum australe. The structures of these compounds were assigned by analysis of 1D and 2D NMR data and comparison with data registered in the literature for these compounds. The DNA-damaging activity of 1 is being described for the first time. (author)

  19. Geochemical evidence of past earthquakes in sediments of the Reloncaví fjord (Chilean Patagonia) during the last ˜ 1000 years

    Science.gov (United States)

    Rebolledo, Lorena; Lange, Carina; Muñoz, Práxedes; Salamanca, Marco

    2014-05-01

    The Chilean fjords are excellent archives of paleoearthquakes, tsunamis and landslides (St-Onge et al., 2012 in Sedimentary Geology 243-244: 89-107). Here we report on new sedimentological and geochemical evidence of past earthquakes in sediments of the Reloncavi fjord, Northern Patagonia (41° S, 72° W), during the last ~1000 years. We recovered four sediment cores from the Reloncaví fjord (RH-5B, RH-5C, RH-6B, RH7B, water depth range = 90-260 m; core length range = 45-75 cm). Age models were based on 210Pb, AMS-14C and the first appearance of the diatom Rhizosolenia setigera cf. pungens in the fossil record as statigraphic marker. The cores span the last ~122 to 800 years of sedimentation with sedimentation rates ranging between 0.1 and 0.24 cm yr-1. The cores revealed evidence of turbidites associated with the historical earthquakes of 1960, 1837, 1737 and 1575 AD, and an earlier period for which there is no historical information, 1200-1400 AD. The turbidites exhibit a grading-up pattern with sand layers, and are characterized by a decrease in organic carbon and biogenic opal, an increase in the C/N molar ratio, negative values of δ13Corg(average -27),and an increase in the relative abundance of Paralia sulcata, a diatom associated with sandy environments, being the turbite layers mainly freshwater in origen. We suggest that these turbidite layers were triggered by past earthquakes that produced movement of land from the cliff areas that surround the Reloncaví fjord. Funding: Project FONDECYT # 11110103 and COPAS Sur-Austral project PFB-31.

  20. Patagonia, Land of Nomads: A Glance at a Territory Shaped by Displacement

    Directory of Open Access Journals (Sweden)

    Pablo Chiuminatto

    2016-05-01

    Full Text Available By the end of the nineteenth century, as global voyages became popular, and transcontinental empires settled, remote corners of the third world such as Patagonia began to be explored and became the subject of European travel literatures. The opening of this region to the global scenario produced profound transformations in its territorial conformation, poetic imaginary, and local culture. As Patagonia became a land of travellers, local nomads which had inhabited this land for centuries became extinguished. The historical context of this re-shaping is conceptualised in literary theory through notions such as nomadism, elaborated by Gilles Deleuze and its aesthetical counterpart, geo-poetics, by Kenneth White. The travel literature about Patagonia, such as that produced by Charles Darwin, Lady Florence Dixie, and Bruce Chatwin, depicts the difficulties these travellers faced in trying to endow their writings of adequate descriptions and images. Instead, they recurred to images from their homeland, and thus created an imaginary of Patagonia through displacement: their own, and that of images brought by themselves to this land. When Chilean poets like Gabriela Mistral and Pablo Neruda begun to write about Patagonia, they found it already populated by strange images, shaped indeed, by nomads, travellers and dis-located identities.

  1. Importance of mixotrophic nanoplankton in Aysén Fjord (Southern Chile) during austral winter

    Science.gov (United States)

    Czypionka, Till; Vargas, Cristian A.; Silva, Nelson; Daneri, Giovanni; González, Humberto E.; Iriarte, José Luis

    2011-03-01

    Mixotrophy, the combination of autotrophic and heterotrophic nutrition in the same organism, is widespread in planktonic algae. Several reports from temperate and high-latitude fjords in Scandinavia suggest the occurrence of a niche in late summer and autumn during post-bloom conditions in which mixotrophic algae can become important grazers in pelagic ecosystems, accessing the nutrients bound in their prey to overcome nutrient limitation. Here, we experimentally determined the trophic modes and bacterivory rates for the nanoplankton community (2-20 μm) in Aysén Fjord located in the Chilean Northern Patagonia during two contrasting seasons: winter and spring. While mixotrophic nanoplankton was virtually absent from the system in spring, in winter at occasions it even constituted the dominant trophic group of the nanoplankton with abundances of >900 cells mL -1. This indicates a second niche for mixotrophs in winter, when mixotrophy allows overcoming light limitation.

  2. POTENCIAL TURÍSTICO DE MOQUEHUE, PATAGONIA ARGENTINA

    Directory of Open Access Journals (Sweden)

    Martín Capel

    2016-12-01

    Full Text Available El lago Moquehue es un espejo de agua ubicado en el departamento Aluminé, provincia del Neuquén, en plena cordillera de los Andes. Se encuentra a 148 km de la localidad de Zapala por ruta provincial No 13 y a 230 km por ruta provincial No 23. El área mencionada se encuentra a casi 400 Km de Neuquén Capital, enclavado a 1.200 msnm. (Figura 1. El topónimo de su nombre, ciertamente desconocido, referiría a un posible origen en Mongueln-Hue (Lugar donde se da vida o Neque–Hue (Sitio de Lechuzas o de Pesadillas (Erize, 1990.

  3. A widespread devonian methamorphic episode in northern Patagonia, Argentina

    International Nuclear Information System (INIS)

    Ostera, H.A.; Linares, E; Haller, M.J; Cagnoni, M.C.; Lopez de Luchi, M

    2001-01-01

    One of the greatest difficulties in Rb-Sr dating on metamorphic rocks is the lack of evidences of complete re-homogenization and the assumption of a common initial ratio for all the samples analyzed. The redistribution of parent-daughter elements and the concomitant partial or complete equilibration of the isotopic system could occur on mineral or regional size domains. This fact led to many authors to discard or disapprove the use of this method in metamorphic terranes. However, recent papers suggested that this opinion has been premature and that additional information could be obtained by the Rb-Sr method despite the difficulties that it implies (Patel et al., 1999). Many reports on well fitted Rb-Sr isochrons giving the age of metamorphism in regionally metamorphosed rocks, suggest that the Sr isotopic equilibrium can take place at different scales. This paper presents data and the Rb-Sr system behaviour from a metamorphic unit (Cushamen Formation) in the Northern Patagonia, as a contribution to elucidate the evolution of the North Patagonian Massif (au)

  4. Root proliferation in native perennial grasses of arid Patagonia, Argentina

    Institute of Scientific and Technical Information of China (English)

    Yanina A. TORRES; Mara M. MUJICA; Sandra S. BAIONI; Jos ENTO; Mara N. FIORETTI; Guillermo TUCAT; Carlos A. BUSSO; Oscar A. MONTENEGRO; Leticia ITHURRART; Hugo D. GIORGETTI; Gustavo RODRGUEZ; Diego BENTIVEGNA; Roberto E. BREVEDAN; Osvaldo A. FERNNDEZ

    2014-01-01

    Pappophorum vaginatum is the most abundant C4 perennial grass desirable to livestock in rangelands of northeastern Patagonia, Argentina. We hypothesized that (1) defoliation reduce net primary productivity, and root length density and weight in the native species, and (2) root net primary productivity, and root length density and weight, are greater in P. vaginatum than in the other, less desirable, native species (i.e., Aristida spegazzinii, A. subulata and Sporobolus cryptandrus). Plants of all species were either exposed or not to a severe defoliation twice a year during two growing seasons. Root proliferation was measured using the cylinder method. Cylindrical, iron structures, wrapped up using nylon mesh, were buried diagonally from the periphery to the center on individual plants. These structures, initially filled with soil without any organic residue, were dug up from the soil on 25 April 2008, after two successive defoliations in mid-spring 2007. During the second growing season (2008-2009), cylinders were destructively harvested on 4 April 2009, after one or two defoliations in mid-and/or late-spring, respectively. Roots grown into the cylinders were obtained after washing the soil manually. Defoliation during two successive years did reduce the study variables only after plants of all species were defoliated twice, which supported the first hypothesis. The greater root net primary productivity, root length den-sity and weight in P. vaginatum than in the other native species, in support of the second hypothesis, could help to explain its greater abundance in rangelands of Argentina.

  5. First South American Agathis (Araucariaceae), Eocene of Patagonia.

    Science.gov (United States)

    Wilf, Peter; Escapa, Ignacio H; Cúneo, N Rubén; Kooyman, Robert M; Johnson, Kirk R; Iglesias, Ari

    2014-01-01

    Agathis is an iconic genus of large, ecologically important, and economically valuable conifers that range over lowland to upper montane rainforests from New Zealand to Sumatra. Exploitation of its timber and copal has greatly reduced the genus's numbers. The early fossil record of Agathis comes entirely from Australia, often presumed to be its area of origin. Agathis has no previous record from South America. We describe abundant macrofossils of Agathis vegetative and reproductive organs, from early and middle Eocene rainforest paleofloras of Patagonia, Argentina. The leaves were formerly assigned to the New World cycad genus Zamia. Agathis zamunerae sp. nov. is the first South American occurrence and the most complete representation of Agathis in the fossil record. Its morphological features are fully consistent with the living genus. The most similar living species is A. lenticula, endemic to lower montane rainforests of northern Borneo. Agathis zamunerae sp. nov. demonstrates the presence of modern-aspect Agathis by 52.2 mya and vastly increases the early range and possible areas of origin of the genus. The revision from Zamia breaks another link between the Eocene and living floras of South America. Agathis was a dominant, keystone element of the Patagonian Eocene floras, alongside numerous other plant taxa that still associate with it in Australasia and Southeast Asia. Agathis extinction in South America was an integral part of the transformation of Patagonian biomes over millions of years, but the living species are disappearing from their ranges at a far greater rate.

  6. Accès au savoir en Afrique australe : le libre accès à la recherche à l ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Access to Knowledge Southern Africa (A2KSA) a pour but de mieux comprendre les différentes contraintes entourant l'accès des universités d'Afrique australe au savoir à des fins de recherche et ... A new website and resource library will help improve developing country registration and information systems for vital events.

  7. Accès au savoir en Afrique australe : le libre accès à la recherche à l ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Access to Knowledge Southern Africa (A2KSA) a pour but de mieux comprendre les différentes contraintes entourant l'accès des universités d'Afrique australe au savoir à des fins de recherche et d'enseignement. Le projet, une collaboration de recherche entre la Southern African Regional Universities Association ...

  8. Generalised additive models to investigate environmental drivers of Antarctic minke whale (Balaenoptera bonaerensis) spatial density in austral summer

    NARCIS (Netherlands)

    Beekmans, B.W.P.M.; Forcada, J.; Murphy, E.J.; Baar, H.J.W.; Bathmann, U.V.; Fleming, A.H.

    2010-01-01

    There is a need to characterise the physical environment associated with Antarctic minke whale density in order to understand long-term changes in minke whale distribution and density in open waters of the Southern Ocean during austral summer months. To investigate environmental drivers of Antarctic

  9. Occurrence of Magellanic Penguins along the Northeast Brazilian Coast during 2008 Austral Winter

    Directory of Open Access Journals (Sweden)

    Renato Ramos da Silva

    2012-01-01

    Full Text Available During the austral winter of 2008, thousands of penguins traveled to low latitudes along the South Atlantic coast of South America. The atmospheric and oceanic conditions from April to July 2008 may account for the penguins' unusual geographic distribution. During that period, South Atlantic coastal waters were cooler; the wind anomalies had northward and onshore components; the ocean's coastal region presented northward currents that favored the penguins to travel toward lower latitudes. This anomalous climate regime resulted from extreme meteorological frontal systems that occurred mainly during June 2008. Three consecutive extreme midlatitude cyclones produced strong wind shear that resulted in the northward oceanic flow along the South American eastern shoreline favoring the penguins to be spotted in northern tropical waters.

  10. Variability of Soil Types in Wetland Meadows in the South of the Chilean Patagonia Variabilidad de Tipos de Suelos en Las Vegas del Sur de la Patagonia Chilena

    OpenAIRE

    Ladislava Filipová; Radim Hédl; Nilo Covacevich C.

    2010-01-01

    The wetland meadows and pastures (vegas) of the agricultural zone of the Magallanes Region and the Chilean Patagonia are productive and intensively exploited ecosystems. However, there is scarce data about the typology and the physical and chemical properties of the soils that determine the agricultural potential of vegas sites. Sampling of the main horizons of 47 soil profiles was conducted throughout the area. The profiles were described in the field and consequently classified according to...

  11. Firewood Resource Management in Different Landscapes in NW Patagonia

    Directory of Open Access Journals (Sweden)

    Daniela V. Morales

    2017-09-01

    Full Text Available Ecosystems, their components, processes and functions are all subject to management by human populations, with the purpose of adapting the environments to make them more habitable and ensuring the availability and continuity of subsistence resources. Although a lot of work has been carried out on resources of alimentary or medicinal interest, little has been done on associating processes of domestication with firewood extraction, a practice considered to be destructive of the environment. In the arid steppe of NW Patagonia, inhabited and managed for different purposes for a long time by Mapuche-Tehuelche communities, the gathering of combustible plant species has up to the present time played a crucial role in cooking and heating, and work is required to achieve sustainability of this resource. In this study we evaluate whether environments with less landscape domestication are more intensively used for firewood gathering. Using an ethnobiological approach, information was obtained through participant observation, interviews and free listing. The data were examined using both qualitative and quantitative approaches. Twenty-eight firewood species are gathered, both native (75% and exotic (25%. The supply of firewood mainly depends on gathering from the domesticated (10 species, semi-domesticated (17 species and low human intervention landscapes (17 species. In contrast to our hypothesis, average use intensity is similar in all these landscapes despite their different levels of domestication. That is, the different areas are taken advantage of in a complementary manner in order to satisfy the domestic demand for firewood. Neither do biogeographic origin or utilitarian versatility of collected plants vary significantly between the different landscape levels of domestication. Our results show that human landscape domestication for the provision of firewood seems to be a socio-cultural resilient practice, and shed new light on the role of culture in

  12. Holocene Dynamics of Temperate Rainforests in West-Central Patagonia

    Directory of Open Access Journals (Sweden)

    Virginia Iglesias

    2018-01-01

    Full Text Available Analyses of long-term ecosystem dynamics offer insights into the conditions that have led to stability vs. rapid change in the past and the importance of disturbance in regulating community composition. In this study, we (1 used lithology, pollen, and charcoal data from Mallín Casanova (47°S to reconstruct the wetland, vegetation, and fire history of west-central Patagonia; and (2 compared the records with independent paleoenvironmental and archeological information to assess the effects of past climate and human activity on ecosystem dynamics. Pollen data indicate that Nothofagus-Pilgerodendron forests were established by 9,000 cal yr BP. Although the biodiversity of the understory increased between 8,480 and 5,630 cal yr BP, forests remained relatively unchanged from 9,000 to 2,000 cal yr BP. The charcoal record registers high fire-episode frequency in the early Holocene followed by low biomass burning between 6,500 and 2,000 cal yr BP. Covarying trends in charcoal, bog development, and Neoglacial advances suggest that climate was the primary driver of these changes. After 2,000 cal yr BP, the proxy data indicate (a increased fire-episode frequency; (b centennial-scale shifts in bog and forest composition; (c the emergence of vegetation-fire linkages not recorded in previous times; and (d paludification in the last 500 years possibly associated with forest loss. Our results therefore suggest that Nothofagus-Pilgerodendron dominance was maintained through much of the Holocene despite long-term changes in climate and fire. Unparalleled fluctuations in local ecosystems during the last two millennia were governed by disturbance-vegetation-hydrology feedbacks likely triggered by greater climate variability and deforestation.

  13. Deglacial palaeoclimate at Puerto del Hambre, subantarctic Patagonia, Chile

    Science.gov (United States)

    Heusser, Calvin J.; Heusser, Linda E.; Lowell, Thomas V.; Moreira M., Andrés; Moreira M., Simón

    2000-02-01

    The primary objective of this study is to further substantiate multistep climatic forcing of late-glacial vegetation in southern South America. A secondary objective is to establish the age of deglaciation in Estrecho de Magallanes-Bahía Inútil. Pollen assemblages at 2-cm intervals in a core of the mire at Puerto del Hambre (53°3621S, 70°5553W) provide the basis for reconstructing the vegetation and a detailed account of palaeoclimate in subantarctic Patagonia. Chronology over the 262-cm length of core is regulated by 20 AMS radiocarbon dates between 14 455 and 10 089 14C yr BP. Of 13 pollen assemblage zones, the earliest representing the Oldest Dryas chronozone (14 455-13 000 14C yr BP) records impoverished steppe with decreasing frequencies and loss of southern beech (Nothofagus). Successive 100-yr-long episodes of grass/herbs and of heath (Empetrum/Ericaceae) before 14 000 14C yr BP infer deglacial successional communities under a climate of increased continentality prior to the establishment of grass-dominated steppe. The Bølling-Allerød (13 000-11 000 14C yr BP) is characterised by mesic grassland under moderating climate that with abrupt change to heath dominance after 12 000 14C yr BP was warmer and not as humid. At the time of the Younger Dryas (11 000-10 000 14C yr BP), grass steppe expanded with a return of colder, more humid climate. Later, with gradual warming, communities were invaded by southern beech. The Puerto del Hambre record parallels multistep, deglacial palaeoclimatic sequences reported elsewhere in the Southern Andes and at Taylor Dome in Antarctica. Deglaciation of Estrecho de Magallanes-Bahía Inútil is dated close to 14 455 14C yr BP, invalidating earlier dates of between 15 800 and 16 590 14C yr BP.

  14. Mineralogical association in the zone of argillic advanced alteration in a kaolin deposit of Patagonia Argentina

    International Nuclear Information System (INIS)

    Rainoldi, A; Oviedo, P.; Maiza, P.; Marfil, S.

    2010-01-01

    This work is about the mineralogical and petrological relations of the para genetic association of advanced argillic zone in the kaolin deposit in Patagonia.This study allowed to establish the sequence of events that took place in the deposit as well as the conditions under which they were generated

  15. Aeolian sediment mass fluxes on a sandy soil in Central Patagonia

    NARCIS (Netherlands)

    Sterk, G.; Parigiani, J.; Cittadini, E.; Peters, P.; Scholberg, J.; Peri, P.

    2012-01-01

    The climate of Patagonia is semi-arid and characterised by frequent strong winds. Wind erosion is potentially a serious soil degradation process that impacts long-term sustainability of local agricultural systems, but the conditions and the rates of wind erosion in this region have not been

  16. Ploidy levels and reproductive behaviour in invasive Hieracium pilosella in Patagonia

    Czech Academy of Sciences Publication Activity Database

    Krahulec, František; Krahulcová, Anna

    2011-01-01

    Roč. 11, - (2011), s. 25-31 ISSN 1619-0033 R&D Projects: GA ČR GA206/08/0890 Institutional research plan: CEZ:AV0Z60050516 Keywords : Patagonia * ploidy levels * hybridization Subject RIV: EF - Botanics

  17. Planeamiento estratégico de la Provincia de Castrovirreyna

    OpenAIRE

    Brückmann Portugal, Francisco; Díaz Villazana, Patricia Úrsula; Niquén Espejo, Roque Fabricio; Torres Solís, José Orestes

    2017-01-01

    xiv, 142 h. : il. ; 30 cm. El Plan Estratégico de la provincia de Castrovirreyna se realizó con base en el Modelo Secuencial del Proceso Estratégico, el cual desarrolló el Dr. Fernando D’Alessio Ipinza, quien partió de un análisis de la situación actual, para llegar a una situación futura deseada, por medio del establecimiento de la visión, misión, valores, objetivos de largo plazo, corto plazo y estrategias asociadas al entorno y sus fortalezas, debilidades, oportunidades y ...

  18. La escritura carolina publicitaria en la provincia de Burgos

    Directory of Open Access Journals (Sweden)

    Alejandro García Morilla

    2013-11-01

    Full Text Available Siendo la producción epigráfica el reflejo de la actividad publicitaria de una determianda sociedad, ésta presenta especiales caracterísiticas a lo largo del siglo XII en la actual provincia de Burgos. Desde finales del siglo XI y hasta los inicios del siglo XIII, en la actual provincia de Burgos se introdujo una nueva forma de escritura publicitaria procedente del mundo franco, cuyo origen gráfico estaba en la escritura monumental romana. Esta nueva escritura convivió en nuestra provincia junto con la visigótica nacional hasta que ésta última fue progresivamente desapareciendo a lo largo del siglo XII. Así pues, aquí presentamos un estudio de esta escritura basado en los sesenta y ocho epígrafes que forman el Corpus de inscripciones carolinas de la provincia de Burgos. En él mostramos el proceso evolutivo de la escritura carolina, la convivencia de estas escrituras, así como las particularidades asociadas a los diferentes centros de producción.Epigraphical production is a reflection of the activity of publicity in a given society. This production presents a number of special features as in the case of the area covering the current province of Burgos during the twelfth century. From the end of the eleventh to the beginning of the twelfth century, a new form of script originating in Roman monumental inscriptions was introduced through the Frankish realms in the territory known today as Burgos. This new type of writing was being produced simultaneously with the national Visigothic script until the latter gradually vanish edduring the twelfth century. Our study examines this type of script based on seventy-eight epigraphs that make up the complete body of Carolingian inscriptions in Burgos. It will thus show the evolutionary process of the Carolingian script, the coexistence of these two types of writing and the main features associated with the different centres of production.

  19. Planeamiento estratégico de la Provincia de Cajabamba

    OpenAIRE

    Leyva Ojeda, Ralph William; Manzanares Grados, Ruth Aracelis; Urbano Chunga, Elizabeth Gladys; Zeta Chulle, José de la Rosa

    2017-01-01

    La provincia de Cajabamba está ubicada en el extremo sur de la región de Cajamarca, conocida por su paradisiaca belleza de la Cordillera de los Andes del Perú, combinada con sus recursos mineros, productos agropecuarios y el comercio entre sus cuatro distritos y con otras regiones incluida la capital, presenta un alto grado de pobreza y pobreza extrema en su población, además de un bajo número de asistentes a educación secundaria, carreras técnicas y universitarios, debido a un...

  20. Monitoreo de DDI en la provincia de Corrientes (2005)

    OpenAIRE

    Lapertosa, Silvia B; Ludman, Verónica C; Lecuna Hélice, L; Pécora, R; Bernatené, D; Sartorio, G; Niepomniszcze, H

    2009-01-01

    Un total de 610 alumnos de escolaridad primaria, de ambos sexos, fue estudiado en este monitoreo de bocio endémico en dos localidades de la provincia de Corrientes: Ciudad de Corrientes (292 niños) y Paso de la Patria (318 niños). La edad de los escolares osciló entre 6 y 15 años. La palpación tiroidea fue hecha por el conjunto de los médicos participantes. Sin embargo, con la finalidad de aunar criterios con lo realizado previamente (1-23), se tomó como única referencia la palpación de H.N.,...

  1. Planeamiento estratégico para la Provincia de Lamas

    OpenAIRE

    Ichpas Adauto, Heber; Regalado Gutiérrez, Diego; Cuéllar Vanegas, Lina; Sánchez Andrés, Sandro

    2017-01-01

    El presente estudio tiene como objetivo el desarrollo de un plan estratégico para la provincia de Lamas con una visión hacia el año 2030, donde se presentan las estrategias y objetivos necesarios para incrementar su nivel de competitividad, dando valor al recurso humano, y tomando como pilares de su desarrollo a la educación, la salud y la reformulación de sus principales actividades económicas para incrementar su capacidad de generación de riqueza mediante su actuación sobre t...

  2. Estado actual del conocimiento de la familia Ceratopogonidae en la Patagonia (Diptera: Nematocera Current knowledge of the family Ceratopogonidae in Patagonia (Diptera: Nematocera

    Directory of Open Access Journals (Sweden)

    Gustavo R. Spinelli

    2009-06-01

    Full Text Available Ceratopogonidae incluye pequeños dípteros nematoceros que crían en hábitats acuáticos o semiacuáticos. Hasta los '80, el conocimiento de su taxonomía en la Patagonia se hallaba limitado a la contribución de los comienzos de los '30 de Ingram y Macfie, sobre la base de material capturado en 1926-27, en el área del Parque Nacional Nahuel Huapi y zonas vecinas de Chile. En los últimos 25 años, se pusieron en marcha diferentes proyectos, resultando la descripción o registro de numerosos taxones para la región. Si se contabilizan los datos publicados, 102 especies habitan en la Patagonia, de las cuales 86 (84,31% son endémicas para la región. Este alto porcentaje es evidente en los bosques de Nothofagus, con 71 especies endémicas de este bioma, nueve lo son de la estepa y seis presentan registros en bosque y estepa. Datos aún no publicados concuerdan con este esquema. Diecinueve géneros están representados en la Patagonia, diez de ellos con amplia distribución, tres de distribución transantártica y seis son endémicos para el área. Para la misma, se hallan publicadas las revisiones de Forcipomyia, Atrichopogon, Borkenthelea, Macrurohelea y Paradasyhelea; se han finalizado y aún no publicado aquellas de Dasyhelea y Palpomyia, está muy avanzada la de Stilobezzia y se prevé comenzar con las de Austrohelea, Austrosphaeromias, Physohelea y Bezzia. Se calcula que estos datos no divulgados contienen al menos 55 especies todavía no descriptas. Con respecto a los aspectos biogeográficos se pueden destacar estudios que tienden a establecer relaciones entre las áreas reconocidas en esquemas biogeográficos propuestos para la región andina.Ceratopogonidae includes small nematoceran Diptera which breed in aquatic and semiaquatic habitats. Until the 80´s its taxonomic knowledge in Patagonia was limited to the early 30´s contribution of Ingram and Macfie, from material collected in 1926-27 in the area of the Nahuel Huapi National

  3. Influence of aerosol-cloud interaction on austral summer precipitation over Southern Africa during ENSO events

    Science.gov (United States)

    Ruchith, R. D.; Sivakumar, V.

    2018-04-01

    In the present study, we are investigating the role of aerosols-and clouds in modulating the austral summer precipitation (December-February) during ENSO events over southern Africa region for the period from 2002 to2012 by using satellite and complimentary data sets. Aerosol radiative forcing (ARF) and Cloud radiative forcing (CRF) shows distinct patterns for El-Nina and La-Nina years. Further analysis were carried out by selecting the four Southern Africa regions where the precipitation shows remarkable difference during El-Nino and La-Nina years. These regions are R1 (33°S-24°S, 18°E-30°E), R2 (17°S-10°S, 24°E-32°E), R3 (19°S-9°S, 33°E-41°E) and R4 (7°S-0°S, 27°E-36°E). Aerosol Optical depth (AOD) shows considerable differences during these events. In region R1, R2 and R3 AOD shows more abundance in El-Nino years as compared to La-Nina years where as in R4 the AOD shows more abundance in La-Nina years. Cloud Droplet Effective radius (CDER) shows higher values during La-Nina years over R1, R2 and R3 regions but in R4 region CDER shows higher values in El-Nino years. Aerosol indirect effect (AIE) is estimated both for fixed cloud liquid water path (CLWP) and for fixed cloud ice path (CIP) bins, ranging from 1 to 300 gm -2 at 25 gm -2 interval over all the selected regions for El-Nino and La-Nina years. The results indicate more influence of positive indirect effect (Twomey effect) over R1 and R3 region during El-Nino years as compared to La-Nina years. This analysis reveals the important role of aerosol on cloud-precipitation interaction mechanism illustrating the interlinkage between dynamics and microphysics during austral summer season over southern Africa.

  4. The Usefulness of Edible and Medicinal Fabaceae in Argentine and Chilean Patagonia: Environmental Availability and Other Sources of Supply

    OpenAIRE

    Molares, Soledad; Ladio, Ana

    2011-01-01

    Fabaceae is of great ethnobotanical importance in indigenous and urban communities throughout the world. This work presents a revision of the use of Fabaceae as a food and/or medicinal resource in Argentine-Chilean Patagonia. It is based on a bibliographical analysis of 27 ethnobotanical sources and catalogues of regional flora. Approximately 234 wild species grow in Patagonia, mainly (60%) in arid environments, whilst the remainder belong to Sub-Antarctic forest. It was found that 12.8% (30 ...

  5. Angiostrongylus vasorum in 20 cani della provincia di Chieti, Italia

    Directory of Open Access Journals (Sweden)

    Daniela Morelli

    2011-01-01

    Full Text Available A seguito di un caso di Angiostrongylus vasorum, diagnosticato all’inizio del 2008 nella provincia di Chieti, è stata organizzata una ricerca parassitologica al fine di indagare la presenza del parassita nei cani nella stessa area. Da gennaio a settembre 2008 sono stati esaminati 178 cani, 56 carcasse e 122 campioni di feci. Nelle carcasse sono stati ricercati i parassiti adulti nel ventricolo destro e nell’arteria polmonare e le forme larvali in tessuti di organi interni e cervello. Nelle feci è stata ricercata la forma larvale L1 con tre metodiche diagnostiche utilizzate correntemente per la ricerca di endoparassiti e larve di strongili broncopolmonari. Sono stati diagnosticati 20 casi (8,9% con identificazione di parassiti adulti in 5 cani e larve L1 in altri 15 soggetti. L’esame anatomopatologico delle carcasse dei cani con nematodi adulti ha evidenziato polmonite, pleurite, schiuma rossastra in trachea, versamento di liquido sieroemorragico in cavità toracica e ingrossamento di linfonodi medinici e meseraici. L’esame istologico dei tessuti ha evidenziato quadri gravi e sovrapponibili con lesioni da localizzazione dei parassiti in reni, linfonodi e cervello. Il numero cospicuo di casi riscontrati ha reso indispensabile considerare l’angiostrongilosi nelle diagnosi differenziali degli esami clinici e autoptici di cani della provincia di Chieti (Italia e dei territori confinanti.

  6. Holocene tephra-fall deposits of southern and austral Andes volcanic zones (33-54oS): eruption recurrence

    International Nuclear Information System (INIS)

    Naranjo, J.A.; Polanco, E.; Lara, L; Moreno, H; Stern, C.R

    2001-01-01

    Radiometric 14 C dating is a very useful tool to study the chronostratigraphy of pyroclastic deposits. In addition, 14 C ages are essential parameters for the estimation of the recurrence time of the explosive volcanic activity. The origin, distribution and relative age of mappable Holocene tephra-fall deposits of the Southern Andes Volcanic Zone (SVZ) and Austral Andes Volcanic Zone (AVZ) from 33 o S-54 o S, were studied and their recurrence period is analysed (au)

  7. Construction of a complete set of alien chromosome addition lines from Gossypium australe in Gossypium hirsutum: morphological, cytological, and genotypic characterization.

    Science.gov (United States)

    Chen, Yu; Wang, Yingying; Wang, Kai; Zhu, Xiefei; Guo, Wangzhen; Zhang, Tianzhen; Zhou, Baoliang

    2014-05-01

    We report the first complete set of alien addition lines of G. hirsutum . The characterized lines can be used to introduce valuable traits from G. australe into cultivated cotton. Gossypium australe is a diploid wild cotton species (2n = 26, GG) native to Australia that possesses valuable characteristics unavailable in the cultivated cotton gene pool, such as delayed pigment gland morphogenesis in the seed and resistances to pests and diseases. However, it is very difficult to directly transfer favorable traits into cultivated cotton through conventional gene recombination due to the absence of pairing and crossover between chromosomes of G. australe and Gossypium hirsutum (2n = 52, AADD). To enhance the transfer of favorable genes from wild species into cultivated cotton, we developed a set of hirsutum-australe monosomic alien chromosome addition lines (MAAL) using a combination of morphological survey, microsatellite marker-assisted selection, and molecular cytogenetic analysis. The amphidiploid (2n = 78, AADDGG) of G. australe and G. hirsutum was consecutively backcrossed with upland cotton to develop alien addition lines of individual G. australe chromosomes in G. hirsutum. From these backcross progeny, we generated the first complete set of chromosome addition lines in cotton; 11 of 13 lines are monosomic additions, and chromosomes 7G(a) and 13G(a) are multiple additions. MAALs of 1G(a) and 11G(a) were the first to be isolated. The chromosome addition lines can be employed as bridges for the transfer of desired genes from G. australe into G. hirsutum, as well as for gene assignment, isolation of chromosome-specific probes, flow sorting and microdissection of chromosome, development of chromosome-specific ''paints'' for fluorochrome-labeled DNA fragments, physical mapping, and selective isolation and mapping of cDNAs for a particular G. australe chromosome.

  8. Low and high frequency Madden-Julian oscillations in austral summer: interannual variations

    Energy Technology Data Exchange (ETDEWEB)

    Izumo, Takeshi [Research Institute For Global Change (JAMSTEC), Yokohama (Japan); LOCEAN, IRD-CNRS-UPMC, Paris (France); Masson, Sebastien; Vialard, Jerome; Madec, Gurvan [LOCEAN, IRD-CNRS-UPMC, Paris (France); Boyer Montegut, Clement de [IFREMER, Brest (France); Behera, Swadhin K. [Research Institute For Global Change (JAMSTEC), Yokohama (Japan); Takahashi, Keiko [Earth Simulator Center (JAMSTEC), Yokohama (Japan); Yamagata, Toshio [Research Institute For Global Change (JAMSTEC), Yokohama (Japan); University of Tokyo, Tokyo (Japan)

    2010-09-15

    The Madden-Julian oscillation (MJO) is the main component of intraseasonal variability of the tropical convection, with clear climatic impacts at an almost-global scale. Based on satellite observations, it is shown that there are two types of austral-summer MJO events (broadly defined as 30-120 days convective variability with eastward propagation of about 5 m/s). Equatorial MJO events have a period of 30-50 days and tend to be symmetric about the equator, whereas MJO events centered near 8 S tend to have a longer period of 55-100 days. The lower-frequency variability is associated with a strong upper-ocean response, having a clear signature in both sea surface temperature and its diurnal cycle. These two MJO types have different interannual variations, and are modulated by the Indian Ocean Dipole (IOD). Following a negative IOD event, the lower-frequency southern MJO variability increases, while the higher-frequency equatorial MJO strongly diminishes. We propose two possible explanations for this change in properties of the MJO. One possibility is that changes in the background atmospheric circulation after an IOD favour the development of the low-frequency MJO. The other possibility is that the shallower thermocline ridge and mixed layer depth, by enhancing SST intraseasonal variability and thus ocean-atmosphere coupling in the southwest Indian Ocean (the breeding ground of southern MJO onset), favour the lower-frequency southern MJO variability. (orig.)

  9. Ciguatera risk management in French Polynesia: the case study of Raivavae Island (Australes Archipelago).

    Science.gov (United States)

    Chinain, Mireille; Darius, H Taiana; Ung, André; Fouc, Mote Tchou; Revel, Taina; Cruchet, Philippe; Pauillac, Serge; Laurent, Dominique

    2010-10-01

    Based on epidemiological data available through long-term monitoring surveys conducted by both the Public Health Directorate and the Louis Malardé Institute, ciguatera is highly endemic in French Polynesia, most notably in Raivavae (Australes) which appears as a hot spot of ciguatera with an average incidence rate of 140 cases/10,000 population for the period 2007-2008. In order to document the ciguatera risk associated with Raivavae lagoon, algal and toxin-based field monitoring programs were conducted in this island from April 2007 to May 2008. Practically, the distribution, abundance and toxicity of Gambierdiscus populations, along with the toxicity levels in 160 fish distributed within 25 distinct species, were assessed in various sampling locations. Herbivores such as Scarids (parrotfish) and Acanthurids (unicornfish) were rated as high-risk species based on receptor-binding assay toxicity data. A map of the risk stratification within the Raivavae lagoon was also produced, which indicates that locations where both natural and man-made disturbances have occurred remained the most susceptible to CFP incidents. Our findings also suggest that, locally, the traditional knowledge about ciguatera may not be scientifically complete but is functionally correct. Community education resulted in self-regulating behaviour towards avoidance of high-risk fish species and fishing locations. Copyright 2009 Elsevier Ltd. All rights reserved.

  10. An Evaluation of the Predictability of Austral Summer Season Precipitation over South America.

    Science.gov (United States)

    Misra, Vasubandhu

    2004-03-01

    In this study predictability of austral summer seasonal precipitation over South America is investigated using a 12-yr set of a 3.5-month range (seasonal) and a 17-yr range (continuous multiannual) five-member ensemble integrations of the Center for Ocean Land Atmosphere Studies (COLA) atmospheric general circulation model (AGCM). These integrations were performed with prescribed observed sea surface temperature (SST); therefore, skill attained represents an estimate of the upper bound of the skill achievable by COLA AGCM with predicted SST. The seasonal runs outperform the multiannual model integrations both in deterministic and probabilistic skill. The simulation of the January February March (JFM) seasonal climatology of precipitation is vastly superior in the seasonal runs except over the Nordeste region where the multiannual runs show a marginal improvement. The teleconnection of the ensemble mean JFM precipitation over tropical South America with global contemporaneous observed sea surface temperature in the seasonal runs conforms more closely to observations than in the multiannual runs. Both the sets of runs clearly beat persistence in predicting the interannual precipitation anomalies over the Amazon River basin, Nordeste, South Atlantic convergence zone, and subtropical South America. However, both types of runs display poorer simulations over subtropical regions than the tropical areas of South America. The examination of probabilistic skill of precipitation supports the conclusions from deterministic skill analysis that the seasonal runs yield superior simulations than the multiannual-type runs.

  11. Precipitation variability in the winter rainfall zone of South Africa during the last 1400 yr linked to the austral westerlies

    Directory of Open Access Journals (Sweden)

    J. C. Stager

    2012-05-01

    Full Text Available The austral westerlies strongly influence precipitation and ocean circulation in the southern temperate zone, with important consequences for cultures and ecosystems. Global climate models anticipate poleward retreat of the austral westerlies with future warming, but the available paleoclimate records that might test these models have been limited to South America and New Zealand, are not fully consistent with each other and may be complicated by influences from other climatic factors. Here we present the first high-resolution diatom and sedimentological records from the winter rainfall region of South Africa, representing precipitation in the equatorward margin of the westerly wind belt during the last 1400 yr. Inferred rainfall was relatively high ∼1400–1200 cal yr BP, decreased until ∼950 cal yr BP, and rose notably through the Little Ice Age with pulses centred on ∼600, 530, 470, 330, 200, 90, and 20 cal yr BP. Synchronous fluctuations in Antarctic ice core chemistry strongly suggest that these variations were linked to changes in the westerlies. Equatorward drift of the westerlies during the wet periods may have influenced Atlantic meridional overturning circulation by restricting marine flow around the tip of Africa. Apparent inconsistencies among some aspects of records from South America, New Zealand and South Africa warn against the simplistic application of single records to the Southern Hemisphere as a whole. Nonetheless, these findings in general do support model projections of increasing aridity in the austral winter rainfall zones with future warming.

  12. Decadal-scale teleconnection between South Atlantic SST and southeast Australia surface air temperature in austral summer

    Science.gov (United States)

    Xue, Jiaqing; Li, Jianping; Sun, Cheng; Zhao, Sen; Mao, Jiangyu; Dong, Di; Li, Yanjie; Feng, Juan

    2018-04-01

    Austral summer (December-February) surface air temperature over southeast Australia (SEA) is found to be remotely influenced by sea surface temperature (SST) in the South Atlantic at decadal time scales. In austral summer, warm SST anomalies in the southwest South Atlantic induce concurrent above-normal surface air temperature over SEA. This decadal-scale teleconnection occurs through the eastward propagating South Atlantic-Australia (SAA) wave train triggered by SST anomalies in the southwest South Atlantic. The excitation of the SAA wave train is verified by forcing experiments based on both linear barotropic and baroclinic models, propagation pathway and spatial scale of the observed SAA wave train are further explained by the Rossby wave ray tracing analysis in non-uniform basic flow. The SAA wave train forced by southwest South Atlantic warming is characterized by an anomalous anticyclone off the eastern coast of the Australia. Temperature diagnostic analyses based on the thermodynamic equation suggest anomalous northerly flows on western flank of this anticyclone can induce low-level warm advection anomaly over SEA, which thus lead to the warming of surface air temperature there. Finally, SST-forced atmospheric general circulation model ensemble experiments also demonstrate that SST forcing in the South Atlantic is associated with the SAA teleconnection wave train in austral summer, this wave train then modulate surface air temperature over SEA on decadal timescales. Hence, observations combined with numerical simulations consistently demonstrate the decadal-scale teleconnection between South Atlantic SST and summertime surface air temperature over SEA.

  13. Planeamiento estratégico de la Provincia de La Unión

    OpenAIRE

    Palle Morales, Ana Vilma; Palacios Ramos, Roberto Carlos; Rodriguez Yucra, Carlos Martin

    2017-01-01

    La provincia de La Unión se creó mediante el Decreto Supremo del 4 de mayo de 1835 durante el gobierno del Presidente Luis José de Orbegoso y Moncada. Es reconocida como una de las provincias más pobres de la región de Arequipa, tambien es conocida por sus actividades económicas de agricultura y turismo, la provincia tamben esta beneficiada por sus recursos naturales y gran riqueza cultural. Sin embargo a la actualidad no ha logrado alacanzar un crecimiento econonomico y desarr...

  14. La proyección colonial de Chile a la Patagonia Insular en el siglo XVIII

    OpenAIRE

    Urbina Carrasco, María Ximena

    2011-01-01

    In this article, the geopolitical consequences of the shipwreck of the English frigate Wager and the landfall of the ship Anna into the coasts of the Western Insular Patagonia in 1741 are presented, which were part of the fleet of George Anson. The news reporting the English presence in the deserted and unknown insular and coastal territory southernmost Chiloé, and which had disseminated towards the end of the continent, promoted the deployment of different actions tending to make presence no...

  15. La proyección colonial de Chile a la Patagonia Insular en el siglo XVIII

    Directory of Open Access Journals (Sweden)

    Urbina Carrasco, María Ximena

    2011-12-01

    Full Text Available In this article, the geopolitical consequences of the shipwreck of the English frigate Wager and the landfall of the ship Anna into the coasts of the Western Insular Patagonia in 1741 are presented, which were part of the fleet of George Anson. The news reporting the English presence in the deserted and unknown insular and coastal territory southernmost Chiloé, and which had disseminated towards the end of the continent, promoted the deployment of different actions tending to make presence noted, such as military and missionary expeditions, fort establishment and area patrols. None of the latter implied a permanent settlement or effective incorporation of such border, although they indeed involved the creation of a «mobile frontier» for Chiloé and the development of a Western Patagonia image.

    Este artículo presenta las consecuencias geopolíticas del naufragio de la fragata inglesa Wager y la recalada de otro barco, el Anna, que formaban parte de la flota de George Anson, en las costas de la Patagonia Occidental Insular en 1741. La noticia de la presencia inglesa en el despoblado y desconocido territorio insular y bordemarino al sur de Chiloé, y que se proyectaba al fin del continente, generó el despliegue de acciones tendentes a marcar presencia, como expediciones militares y misionales, la fundación de un fuerte y el patrullaje por la zona. Nada de esto se tradujo en un asentamiento permanente o incorporación efectiva de dicha frontera, pero si en la conformación de una «frontera móvil» de Chiloé, y la construcción de una imagen de la Patagonia Occidental.

  16. Characterization of leveling problems of Patagonia gamma-ray spectrometry survey, Chubut province (Argentina)

    International Nuclear Information System (INIS)

    Ford, Kenneth L.; Lopez, Luis E.

    1998-01-01

    Measuring the radioelement concentrations of the soils along traverses perpendicular to the flight line direction was performed in order to gather useful information in support of the leveling of the airborne gamma-ray spectrometer survey of Patagonia. Two sites were selected as test areas which ground and airborne spectrometric data were systematically compared to asses the nature of the leveling problems. It is suspected that variations in soil moisture may play a significant roll in the leveling variations. (author)

  17. Modulation of Fire Regimes by Vegetation and Site Type in Southwestern Patagonia Since 13 ka

    Directory of Open Access Journals (Sweden)

    Patricio I. Moreno

    2018-04-01

    Full Text Available The degree to which vegetation and site type have influenced fire regimes through the Holocene has not been investigated in detail in the temperate ecosystems of southern Patagonia. Here we present a first attempt using a paired-basin approach to study the evolution of fire regimes in sectors dominated by humid Nothofagus forests and the xeric Patagonian steppe in the Magallanes region of Chilean Patagonia (51°S. We analyzed sediment cores from two small lakes and a bog located within the same climate zone on opposite sides of the forest-steppe ecotone, ~28 km apart. The position of this biological boundary east of the Andes is controlled by the strength and position of the southern westerly winds, which constitute the sole source of precipitation throughout western Patagonia. Our results indicate that fires have occurred in the study region repeated times over the last ~13,000 years at bi- and tridecadal timescales. Sectors currently dominated by Patagonian steppe feature high frequency and low magnitude of local fires, and vice versa in humid forests. Climate-driven expansion of Nothofagus scrubland/woodland into steppe environments over the last ~4,200 years increased the magnitude and lowered the frequency of fire events, culminating with peak Nothofagus abundance, fire magnitude and frequency during the last millennium. We also detect divergences between lake-based vs. bog-based paleofire histories among paired sites located within the Patagonian steppe, ~12 km apart, which we attribute to local burning of the bog at times of lowered water table. This divergence suggests to us that bog-based vegetation and fire histories exacerbate a local, azonal, signal blurring extra-local or regional regimes, thus accounting for some discrepancies in the Quaternary paleovegetation/paleoclimate literature of southern Patagonia.

  18. Especies forestales promisorias para la diversificación de forestaciones en la Patagonia Argentina

    OpenAIRE

    Godoy, María Marcela; Defossé, Guillermo E; Thren, Martin

    2007-01-01

    En el oeste de la Patagonia argentina existen aproximadamente 70 mil hectáreas forestadas, de las cuales el 80% corresponde a Pinus ponderosa y el resto a Pseudotsuga menziesii y Pinus contorta. Con el objetivo de evitar esta tendencia hacia los monocultivos con sus consecuencias ecológicas y sanitarias desfavorables, surge la necesidad de evaluar la posibilidad de cultivar otras especies forestales que permitan la diversificación de las actuales forestaciones. En este trabajo se analizaron p...

  19. Geochronologic evidence of a large magmatic province in northern Patagonia encompassing the Permian-Triassic boundary

    Science.gov (United States)

    Luppo, Tomás; López de Luchi, Mónica G.; Rapalini, Augusto E.; Martínez Dopico, Carmen I.; Fanning, Christopher M.

    2018-03-01

    The Los Menucos Complex (northern Patagonia) consists of ∼6 km thick succession of acidic and intermediate volcanic and pyroclastic products, which has been traditionally assigned to the Middle/Late Triassic. New U/Pb (SHRIMP) zircon crystallization ages of 257 ± 2 Ma at the base, 252 ± 2 Ma at an intermediate level and 248 ± 2 Ma near the top of the sequence, indicate that this volcanic event took place in about 10 Ma around the Permian-Triassic boundary. This volcanism can now be considered as the effusive terms of the neighboring and coeval La Esperanza Plutono-Volcanic Complex. This indicates that the climax of activity of a large magmatic province in northern Patagonia was coetaneous with the end-Permian mass extinctions. Likely correlation of La Esperanza- Los Menucos magmatic province with similar volcanic and plutonic rocks across other areas of northern Patagonia suggest a much larger extension than previously envisaged for this event. Its age, large volume and explosive nature suggest that the previously ignored potential role that this volcanism might have played in climatic deterioration around the Permian-Triassic boundary should be investigated.

  20. Estructura administrativa de la Provincia de Bogotá durante el periodo comprendido entre 1832- 1857

    OpenAIRE

    Restrepo Robledo, Luz Marina

    2010-01-01

    El estudio de la estructura administrativa de la provincia de Bogotá en el siglo IX es importante por cuanto se muestra por primera vez cuales fueron los primeros entes administrativos que se crearon durante este periodo, fundamentalmente durante la vigencia de la constitución de 1832. El régimen territorial de las provincias se dividió a su vez en cantones y éstos, en distritos parroquiales.

  1. Energy and Mass Balance At Gran Campo Nevado, Patagonia, Chile

    Science.gov (United States)

    Schneider, C.; Kilian, R.; Casassa, G.

    AWS at Bahia Bahamondes we computed summer ablation for the summer seasons of 1999/2000 and 2000/2001. Ablation at 45o m a.s.l. sums up to about 7 m in 1999/2000 and to 5.5 m in 2000/2001. This is in excellent accordance (+/-2%) with measurements at ablation stakes that have been drilled into the glacier on its ablation area. Surface velocity measured from the displacement of the ablation stakes is estimated to 62 m per year. A RADAR survey with ice penetrating RADAR conducted on the ablation area of Glaciar Lengua during the austral summer 2000/2001 reveals glacier depths between 120 m and 200 m ap- 1 proximately. The data sampled will allow to set up a model for mass flow and ablation at a cross-section of Glaciar Lengua at 450 m a.s.l. Glaciar Lengua has no accumu- lation area itself but obtains all of its ice mass through icefall from the heights of the GCN Ice Cap. Therefore, this model will be of fundamental importance to understand the glacial regime of the entire ice cap. 2

  2. Cambios en el uso del suelo de las tierras del ingenio Las Palmas, provincia de Chaco, en los años 1987 y 2001

    Directory of Open Access Journals (Sweden)

    Febe Rozkiewicz

    2010-01-01

    Full Text Available En el departamento Bermejo, provincia de Chaco, a fines del siglo XIX se origina uno de los ingenios azucareros más importantes del país: Las Palmas del Chaco Austral S.A. En la década de los noventa es víctima de las políticas de privatización imperantes del momento. Como consecuencia, se produce su cierre y posterior desaparición, lo que supuso la eliminación de la principal fuente de trabajo de la localidad. Las tendencias actuales y novedosas en teledetección, cartografía digital y Sistemas de Información Geográfica (SIG son una forma útil e importante de ofrecer conocimientos actualizados para el diagnóstico, monitoreo y su aplicación en la gestión e investigación de recursos presentes en los distintos lugares de nuestro país. En el presente trabajo se pretende analizar los cambios producidos en el uso de suelo en las tierras del ex Ingenio a partir del cierre del mismo, mediante el uso de imágenes satelitales de los años 1987 y 2001, y de sistemas de información geográfica (SIG. El análisis multiespectral y multitemporal de las mismas permitirá discriminar los tipos de cobertura del suelo sobre la base de su respuesta espectral.

  3. Insectos acuáticos de la Meseta del Somuncura, Patagonia, Argentina. Inventario preliminar Aquatic insects from Somuncura plateau, Patagonia, Argentina. Preliminary inventory

    Directory of Open Access Journals (Sweden)

    Javier Muzón

    2005-12-01

    Full Text Available RESUMEN. Se brinda un inventario preliminar de los insectos acuáticos de la Meseta del Somuncura y su área de influencia (Patagonia, Argentina realizado sobre la base de colecciones y registros previos de especies pertenecientes a los órdenes Ephemeroptera, Odonata, Hemiptera (Heteroptera, Trichoptera, Diptera (familias Ceratopogonidae, Culicidae y Psychodidae y Coleoptera. Se han relevado diversos tipos de ambientes en 14 localidades. El número de especies registrado asciende a 78, agrupadas en 51 géneros y 26 familias, de las cuales 33 se citan por primera vez del área. De los taxa registrados 83% de los géneros corresponden a grupos de amplia distribución (neotropicales, americanos o cosmopolitas, mientras que 41% de las especies presentan una distribución patagónica o andina.ABSTRACT. A preliminary inventory of the aquatic insects from the Somuncura plateau and its area of influence (Patagonia, Argentina is presented. It was done on the basis of the study of collections and previous records of species belonging to the orders Ephemeroptera, Odonata, Hemiptera (Heteroptera, Trichoptera, Diptera (families Ceratopogonidae, Culicidae, and Psychodidae and Coleoptera. Different kinds of environments were surveyed in 14 localities. Seventy eigth species grouped in 51 genera and 26 families were registered, and 33 species are new records for the area. Eighty three % of the registered genera are widely distributed (neotropical, american or cosmopolitan, while 41 % of the species exhibit patagonic or andean distribution.

  4. First record of the invasive algae Didymosphenia geminata in the Lake Nahuel Huapi: Argentina, Patagonia

    OpenAIRE

    Beamud, Sara Guadalupe; Baffico, Gustavo Daniel; Pedrozo, Fernando Luis; Diaz, Monica Mabel

    2016-01-01

    The benthic diatom Didymosphenia geminata (L yngbye) M. Schmidt is a ver y aggressive invasive species found in riversand streams in different parts of the world. It has become a major concern for its tendency to form conspicuous blooms in oligotrophic aquatic systems with potential for detrimental impacts on recreational fi shing. Given its explosive development and the notable appearance in Lake Nahuel Huapi during the austral summer of 2013, our aim was to document the fi rst record fo...

  5. PLANTAS AROMÁTICAS CON ÓRGANOS SUBTERRÁNEOS DE IMPORTANCIA CULTURAL EN LA PATAGONIA ARGENTINA: UNA APROXIMACIÓN A SUS USOS DESDE LA ETNOBOTÁNICA, LA PERCEPCIÓN SENSORIAL Y LA ANATOMÍA

    Directory of Open Access Journals (Sweden)

    Soledad Molares

    2012-01-01

    Full Text Available Se analiza la etnobotánica y anatomía de cinco especies aromáticas de uso medicinal y/o comestible altamente valoradas en la Patagonia argentina: Valeriana clarionifolia, V. carnosa (Valerianaceae, Azorella monantha, Osmorhiza chilensis y Eryngium paniculatum (Apiaceae. El principal énfasis ha sido la caracterización de las estructuras secretoras de sus órganos subterráneos y su posible vinculación con las percepciones sensoriales y usos dados por los pobladores. El trabajo etnobotánico se realizó en dos comunidades indígenas Mapuches de la Provincia de Neuquén y en otras dos de la Provincia de Chubut, con un total de 53 entrevistas. El trabajo anatómico consistió en la observación estructural y ultraestructural de las estructuras secretoras. Los informantes indicaron que E. paniculatum es principalmente usada para tratar trastornos digestivos y hepáticos, O. chilensis para problemas de la visión y A. monantha como urinaria y antitusiva; además los órganos subterráneos de estas tres especiesse consumen crudos y/o cocidos. Las especies de Valeriana son usadas principalmente como analgésicas, digestivas, antitusivas y en síndromes culturales. El sabor y el aroma son las principales propiedades sensoriales usadas para reconocer y usar las especies de Valeriana y O. chilensis. A. monantha y E. paniculatum son reconocidas por sus características morfológicas, aunque también se valoranpor su sabor y aroma. Las observaciones microscópicas revelan la presencia de cavidades secretoras esquizógenas en O. chilensis, E. paniculatum y A. monantha y abundante presencia de almidón. En las especies de Valeriana se observa la peridermiscon elevado contenido de aceites esenciales como gotas. Se concluye que estas cinco especies poseen atributos organolépticos originados en estructuras anatómicas especializadas, los que en parte explicarían sus empleos alimenticios y/o medicinales.

  6. Estudo morfoanatômico preliminar do caule e da folha de Acanthospermum australe (Loefl. Kuntze (Asteraceae-Heliantheae

    Directory of Open Access Journals (Sweden)

    Lúcia R. Rocha Martins

    Full Text Available Descrições morfoanatômicas preliminares do caule e da folha de Acanthospermum australe (Loefl. Kuntze foram realizadas a partir de material vegetal fresco e fixado. Secções transversais e paradérmicas, coradas com safranina/azul de astra e azul de toluidina foram analisadas ao microscópio. As superfícies do caule e da folha foram observadas através de microscopia eletrônica de varredura. A. australe apresenta, tanto no caule quanto na folha, tricomas tectores pluricelulares, unisseriados e de extremidades afiladas, e glandulares discóides, com pedúnculo curto unicelular, no qual se prendem cinco séries de células. A folha é anfiestomática e os estômatos são do tipo anomocítico, levemente proeminentes em relação ao nível das demais células epidérmicas. O caule apresenta crescimento secundário inicial, destacando-se os ductos secretores no parênquima cortical e medular.

  7. Formas terminales de Hippidion (Mammalia, Perissodactyla de los yacimientos del Pleistoceno Tardio-Holoceno de la Patagonia (Argentina y Chile

    Directory of Open Access Journals (Sweden)

    Prado, J. L.

    1987-04-01

    Full Text Available The present study is a revision of the terminal forms of the South-American horses coming from the archeological sites of Patagonia. They are compared with those from the Northwest of Argentine. The study also includes paleoenvironmental and cronological related aspects.El presente estudio comprende una revisión de las formas terminales de caballos sudamericanos recuperados de sitios arqueológicos de la Patagonia. Se comparan con las formas del noroeste argentino. Incluye aspectos paleoambientales y cronológicos relacionados.

  8. El pian en la provincia de Esmeraldas, Ecuador

    Directory of Open Access Journals (Sweden)

    Ronald H. Guderian

    1995-09-01

    Full Text Available Se realizó un estudio epidemiológico, clínico y serológico del pian en la cuenca del río Santiago, cantón Eloy Alfaro, provincia de Esmeraldas, el cual demostró una prevalencia del 11,3% con lesiones dérmicas activas y una seropositividad del 94,9%. El área del río Santiago era hiperendémica para el pian (prevalencia 17,9%; seropositividad 98,0%, mientras que el río Zapallito era mesoendémico y los ríos Cayapas y Onzole, hipoendémicos. Se encontró evidencia del pian, activa y latente, solamente en la raza negra. La mayor incidencia de las lesiones clínicas (55,8% se encontró en los niños de 5-12 años de edad, localizándose el porcentaje superior en las piernas (64,2%. Los papilomas fueron las lesiones más frecuentes (55,4%. Se administró tratamiento masivo con penicilina benzatínica, según las normas de OMS, en todas las comunidades positivas para esta enfermedad.

  9. Vivienda y transformaciones de habitabilidad en la Provincia de Arauco

    Directory of Open Access Journals (Sweden)

    Juan Pablo Gramsch Labra

    2006-11-01

    La tercera pregunta, está planteada en función de las infraestructuras higiénicas y de complemento sanitario a la habitabilidad de las familias en sus viviendas, la calidad y disponibilidad de su agua potable, de su alcantarillado, y de la electricidad. Por último, en la cuarta pregunta relacionada, se revisan los avances de la provincia en equipamientos complementarios al interior de las viviendas, de cómo ha evolucionado la calidad y disponibilidad de los artefactos con que cuentan las familias al interior de los hogares, algunos de ellos de gran trascendencia en la calidad de la habitabilidad que estas familias puedan lograr y otros factores adicionales como disponibilidad de Internet y teléfonos celulares, más relacionados con su capacidad de conectarse al resto de la región y del mundo.

  10. La ciudad de provincias: lugar de cambios y de identidades

    Directory of Open Access Journals (Sweden)

    Mª DEL CARMEN LAMELA VIEIRA

    1994-01-01

    Full Text Available Se propone una aproximación al cambio continuo y acelerado propio del crecimiento demográfico secular en las medianas capitales de provincias. Asumiendo el análisis del caso de la ciudad de Lugo como paradigma, se reconoce el efecto mediador de la definición de la situación, del ideal urbano y la identidad colectivamente asumida y defendida. Es evidente la magnitud del cambio social que se produce en todos los ámbitos de la vida urbana de Lugo, pero este se vive sin rupturas importantes, sin la confrontación abierta de interés. Por el contrario, se observa una especie de acomodación pasiva en función de una definición provinciana de la ciudad que niega el cambio y defiende la continuidad de una identidad comunitaria. Los efectos del ideal urbano lucense así definido se hacen sentir especialmente en relación al comportamiento social público, a las distintas posibilidades de integración a la ciudad de los inmigrantes de origen rural y urbano y en relacion al grado y modo de asimilación del cambio.

  11. Do coastal fronts influence bioerosion patterns along Patagonia? Late Quaternary ichnological tools from Golfo San Jorge

    Science.gov (United States)

    Richiano, Sebastián; Aguirre, Marina; Castellanos, Ignacio; Davies, Karen; Farinati, Ester

    2017-12-01

    Late Quaternary marine molluscan skeletal concentrations from Argentina constitute a remarkable record of variations in palaeoceanographical conditions during interglacial times (mainly ca. 125 ka to present). Particularly, the Golfo San Jorge coastal area represents an extraordinary geographical zone to target from different points of view, mainly due to its linkage between northern and southern Patagonia, characterized by particular and contrasting physico-chemical conditions with direct consequences for littoral marine communities, determining their composition and structure. Among varied biological activities controlled by different environmental factors (i.e., substrate nature, sedimentation rates, water depth, sea surface temperature, salinity, nutrients-productivity), bioerosion traces can provide palaeoenvironmental evidence with important implications for palaeoclimate interpretations. In addition, the application of bioerosion patterns regionally and through time is a recent valuable worthy palaeoenvironmental tool not as yet developed for Patagonia. We attempted to characterize, qualitatively/semiquantitatively, the ichnotaxonomic composition of the coastal area of northern Golfo San Jorge since the Late Pleistocene; to compare results with those obtained for other geographical areas along Patagonia and the Bonaerensian coastal sectors; lastly, to evaluate its palaeoenvironmental/palaeoclimatic significance in a clue area in terms of circulation patterns near the Southern Ocean climatic pump. At Bustamante (Northern Patagonia Frontal System) Domichnia traces were dominant during the Late Pleistocene while Praedichnia in the mid-Holocene. Bustamante exhibits the highest ichnodiversity for the whole Argentinean coastal area. Ichnodiversity is not strongly different between Late Pleistocene and mid-Holocene interglacials and compared to present; however, the relative abundance of some ichnotaxa (e.g., Oichnus, Iramena, Pennatichnus, at Camarones; Oichnus

  12. Viruses and Protists Induced-mortality of Prokaryotes around the Antarctic Peninsula during the Austral Summer

    KAUST Repository

    Vaque, Dolors; Boras, Julia A.; Torrent-Llagostera, Francesc; Agusti, Susana; Arrieta, J M; Lara, Elena; Castillo, Yaiza M.; Duarte, Carlos M.; Sala, Maria M.

    2017-01-01

    During the Austral summer 2009 we studied three areas surrounding the Antarctic Peninsula: the Bellingshausen Sea, the Bransfield Strait and the Weddell Sea. We aimed to investigate, whether viruses or protists were the main agents inducing prokaryotic mortality rates, and the sensitivity to temperature of prokaryotic heterotrophic production and mortality based on the activation energy (Ea) for each process. Seawater samples were taken at seven depths (0.1-100 m) to quantify viruses, prokaryotes and protists abundances, and heterotrophic prokaryotic production (PHP). Viral lytic production, lysogeny, and mortality rates of prokaryotes due to viruses and protists were estimated at surface (0.1-1 m) and at the Deep Fluorescence Maximum (DFM, 12-55 m) at eight representative stations of the three areas. The average viral lytic production ranged from 1.0 +/- 0.3 x 10(7) viruses ml(-1) d(-1) in the Bellingshausen Sea to1.3 +/- 0.7 x 10(7) viruses ml(-1) d(-1) in the Bransfield Strait, while lysogeny, when detectable, recorded the lowest value in the Bellingshausen Sea (0.05 +/- 0.05 x 10(7) viruses ml(-1) d(-1)) and the highest in the Weddell Sea (4.3 +/- 3.5 x 10(7) viruses ml(-1) d(-1)). Average mortality rates due to viruses ranged from 9.7 +/- 6.1 x 10(4) cells ml(-1) d(-1) in the Weddell Sea to 14.3 +/- 4.0 x 10(4) cells ml(-1) d(-1) in the Bellingshausen Sea, and were higher than averaged grazing rates in the Weddell Sea (5.9 +/- 1.1 x 10(4) cells ml(-1) d(-1)) and in the Bellingshausen Sea (6.8 +/- 0.9 x 10(4) cells ml-1 d(-1)). The highest impact on prokaryotes by viruses and main differences between viral and protists activities were observed in surface samples: 17.8 +/- 6.8 x 10(4) cells ml(-1) d(-1) and 6.5 +/- 3.9 x 10(4) cells ml(-1) d(-1) in the Weddell Sea; 22.1 +/- 9.6 x 10(4) cells ml(-1) d(-1) and 11.6 +/- 1.4 x 10(4) cells ml(-1) d(-1) in the Bransfield Strait; and 16.1 +/- 5.7 x 10(4) cells ml(-1) d(-1) and 7.9 +/- 2.6 x 10(4) cells ml(-1) d(-1) in

  13. Viruses and Protists Induced-mortality of Prokaryotes around the Antarctic Peninsula during the Austral Summer

    KAUST Repository

    Vaque, Dolors

    2017-03-27

    During the Austral summer 2009 we studied three areas surrounding the Antarctic Peninsula: the Bellingshausen Sea, the Bransfield Strait and the Weddell Sea. We aimed to investigate, whether viruses or protists were the main agents inducing prokaryotic mortality rates, and the sensitivity to temperature of prokaryotic heterotrophic production and mortality based on the activation energy (Ea) for each process. Seawater samples were taken at seven depths (0.1-100 m) to quantify viruses, prokaryotes and protists abundances, and heterotrophic prokaryotic production (PHP). Viral lytic production, lysogeny, and mortality rates of prokaryotes due to viruses and protists were estimated at surface (0.1-1 m) and at the Deep Fluorescence Maximum (DFM, 12-55 m) at eight representative stations of the three areas. The average viral lytic production ranged from 1.0 +/- 0.3 x 10(7) viruses ml(-1) d(-1) in the Bellingshausen Sea to1.3 +/- 0.7 x 10(7) viruses ml(-1) d(-1) in the Bransfield Strait, while lysogeny, when detectable, recorded the lowest value in the Bellingshausen Sea (0.05 +/- 0.05 x 10(7) viruses ml(-1) d(-1)) and the highest in the Weddell Sea (4.3 +/- 3.5 x 10(7) viruses ml(-1) d(-1)). Average mortality rates due to viruses ranged from 9.7 +/- 6.1 x 10(4) cells ml(-1) d(-1) in the Weddell Sea to 14.3 +/- 4.0 x 10(4) cells ml(-1) d(-1) in the Bellingshausen Sea, and were higher than averaged grazing rates in the Weddell Sea (5.9 +/- 1.1 x 10(4) cells ml(-1) d(-1)) and in the Bellingshausen Sea (6.8 +/- 0.9 x 10(4) cells ml-1 d(-1)). The highest impact on prokaryotes by viruses and main differences between viral and protists activities were observed in surface samples: 17.8 +/- 6.8 x 10(4) cells ml(-1) d(-1) and 6.5 +/- 3.9 x 10(4) cells ml(-1) d(-1) in the Weddell Sea; 22.1 +/- 9.6 x 10(4) cells ml(-1) d(-1) and 11.6 +/- 1.4 x 10(4) cells ml(-1) d(-1) in the Bransfield Strait; and 16.1 +/- 5.7 x 10(4) cells ml(-1) d(-1) and 7.9 +/- 2.6 x 10(4) cells ml(-1) d(-1) in

  14. Mechanisms and Attribution of Changes in Austral Summer Precipitation Related to the South Atlantic Convergence Zone

    Science.gov (United States)

    Zilli, Marcia Terezinha

    Austral summer (DJF) precipitation over tropical South America (SA) is characterized by the South American Monsoon System (SAMS) and the South Atlantic Convergence Zone (SACZ). The increase in atmospheric temperature and water vapor content over the SA during the last decades of the 20 th century could affect the duration and amplitude of the SAMS and the intensity of the SACZ. This research examines the spatial variability of precipitation trends over SE Brazil, focusing on the SACZ. More specifically, this study investigates trends in precipitation over Southeastern Brazil (SE Brazil) and examines changes in the position and intensity of the SACZ. SE Brazil is the most densely populated region in the country with a large portion of this population living in urban centers. The SACZ is important for agriculture and water supply for millions of people. One of the main goals of this research is to identify mechanisms associated with the observed changes in the characteristics of the SACZ during the last three decades of the 20th century, and examine the relative contribution of natural and anthropogenic forcing to precipitation trends. The first chapter investigates the pattern of spatial variability of precipitation trends over the coastal region of SE Brazil. This study shows that over the southern portion of the study area, precipitation is increasing due to the increase in the frequency and intensity of extreme events. Over the northern portion of the area, while the intensity of extreme events is increasing, the number of precipitating days is decreasing. This spatial pattern of precipitation trends suggests a poleward shift of the SACZ, which is investigated in the second chapter. Chapter 2 focuses on the underlying mechanisms associated with changes in precipitation intensity related to the position of the SACZ. Decadal variations in the mean state of the atmosphere suggest that the observed changes in precipitation over SE Brazil are associated with a

  15. Viruses and Protists Induced-mortality of Prokaryotes around the Antarctic Peninsula during the Austral Summer.

    Science.gov (United States)

    Vaqué, Dolors; Boras, Julia A; Torrent-Llagostera, Francesc; Agustí, Susana; Arrieta, Jesús M; Lara, Elena; Castillo, Yaiza M; Duarte, Carlos M; Sala, Maria M

    2017-01-01

    During the Austral summer 2009 we studied three areas surrounding the Antarctic Peninsula: the Bellingshausen Sea, the Bransfield Strait and the Weddell Sea. We aimed to investigate, whether viruses or protists were the main agents inducing prokaryotic mortality rates, and the sensitivity to temperature of prokaryotic heterotrophic production and mortality based on the activation energy (Ea) for each process. Seawater samples were taken at seven depths (0.1-100 m) to quantify viruses, prokaryotes and protists abundances, and heterotrophic prokaryotic production (PHP). Viral lytic production, lysogeny, and mortality rates of prokaryotes due to viruses and protists were estimated at surface (0.1-1 m) and at the Deep Fluorescence Maximum (DFM, 12-55 m) at eight representative stations of the three areas. The average viral lytic production ranged from 1.0 ± 0.3 × 10 7 viruses ml -1 d -1 in the Bellingshausen Sea to1.3 ± 0.7 × 10 7 viruses ml -1 d -1 in the Bransfield Strait, while lysogeny, when detectable, recorded the lowest value in the Bellingshausen Sea (0.05 ± 0.05 × 10 7 viruses ml -1 d -1 ) and the highest in the Weddell Sea (4.3 ± 3.5 × 10 7 viruses ml -1 d -1 ). Average mortality rates due to viruses ranged from 9.7 ± 6.1 × 10 4 cells ml -1 d -1 in the Weddell Sea to 14.3 ± 4.0 × 10 4 cells ml -1 d -1 in the Bellingshausen Sea, and were higher than averaged grazing rates in the Weddell Sea (5.9 ± 1.1 × 10 4 cells ml -1 d -1 ) and in the Bellingshausen Sea (6.8 ± 0.9 × 10 4 cells ml -1 d -1 ). The highest impact on prokaryotes by viruses and main differences between viral and protists activities were observed in surface samples: 17.8 ± 6.8 × 10 4 cells ml -1 d -1 and 6.5 ± 3.9 × 10 4 cells ml -1 d -1 in the Weddell Sea; 22.1 ± 9.6 × 10 4 cells ml -1 d -1 and 11.6 ± 1.4 × 10 4 cells ml -1 d -1 in the Bransfield Strait; and 16.1 ± 5.7 × 10 4 cells ml -1 d -1 and 7.9 ± 2.6 × 10 4 cells ml -1 d -1 in the Bellingshausen Sea, respectively

  16. De Patagonia a Budapest: caminos europeos de fósiles santacrucenses (1845-1956)

    OpenAIRE

    Vizcaíno, Sergio Fabián; Bargo, M. Susana

    2013-01-01

    A fines del siglo XIX y principios del XX, acicateados por los descubrimientos de los hermanos Ameghino, los paleontólogos evolucionistas de América del Norte y Europa posaron sus ojos en los mamíferos fósiles de Patagonia. Mientras los primeros organizaron expediciones, los europeos se valieron mayormente de otras formas comunes en la época para hacer colecciones de historia natural, como el intercambio y la compra. En el viejo continente, el devenir de los fósiles patagónicos no escapó a la...

  17. Hidrocarburos no convencionales y fracking: Estado, empresas y tensiones territoriales en la Patagonia argentina

    Directory of Open Access Journals (Sweden)

    Fernando Svampa

    2017-12-01

    Full Text Available En el presente trabajo buscamos abordar los cambios en los territorios donde se han instalado recientemente los emprendimientos para la extracción de Hidrocarburos de Reservorios No Convencionales (HRNC. En ese sentido puntualizamos en el accionar del Estado en sus distintos niveles, y de las empresas que intervienen en los proyectos que se llevan a cabo en la Provincia de Neuquén y en la Provincia de Rio Negro. Buscamos así dar cuenta de la tensión de territorialidades en torno a otras actividades productivas, al cuidado del medio ambiente, la ocupación de territorios y al impacto urbano que trae aparejada la instalación de estas actividades.

  18. Phenological relationships between two insect galls and their host plants: Aspidosperma australe and A. spruceanum (Apocynaceae Relações fenológicas entre duas galhas induzidas por insetos e suas plantas hospedeiras: Aspidosperma australe e A. spruceanum (Apocynaceae

    Directory of Open Access Journals (Sweden)

    Priscila Tolentino Campos

    2010-09-01

    Full Text Available Although gall diversity in the Neotropical region is immense, comparative studies on the phenology of host plants and their galls are scarce. Gall systems generally require high levels of phenological synchrony between the associated organisms. The relationships between the phenology of two leaf galls induced by an unidentified Cecidomyiidae in Aspidosperma spruceanum Benth. ex Müell. Arg. and by Pseudophacopteron sp. in A. australe Müell. Arg. were investigated. The investigation was performed on ten individuals per species in 15-day intervals taking into consideration the percentage of galled leaves. In a one-year study, three distinct phenophases for the leaf galls and four phenophases for host plants were observed. The maximum percentage of leaf galls (80% on A. australe occurred just after the peak of leaf sprouting. In A. spruceanum, the percentage of leaf galls was always over 50%, which can be related to continuous leaf production and gall induction in this species. In both species, developing galls were observed over the entire year, indicating multivoltinism. The ability to induce galls at young and mature sites seems to be a good strategy for galling species survivorship.Embora a diversidade de galhas na região neotropical seja grande, poucos são os estudos fenológicos comparando a fenologia das espécies hospedeiras com aquela das galhas. O desenvolvimento de galhas geralmente requer alta sincronia fenológica entre os organismos associados. A relação entre a fenologia de duas galhas foliares induzidas por um Cecidomyiidae e Aspidosperma spruceanum Benth. ex Müell. Arg. e de uma espécie de Pseudophacopteron sp. e A. australe Müell. Arg. foram investigadas. O trabalho foi realizado em dez indivíduos de cada espécie em intervalos quinzenais, levando em consideração a percentagem de folhas galhadas. Durante um ano, foram observadas três fenofases distintas para as galhas foliares e quatro fenofases para a hospedeira. A

  19. A INTEGRAÇÃO SECURITÁRIA NA ÁFRICA AUSTRAL: A SADC E O OPDS

    Directory of Open Access Journals (Sweden)

    Nathaly Xavier Schutz

    2016-05-01

    Full Text Available Os problemas de segurança do Continente Africano são, em sua grande maioria, originários dos processos de colonização e descolonização ocorridos ao longo dos séculos XIX e XX. Na África Austral, em específico, o regime do apartheid da África do Sul marcou de maneira bastante expressiva a construção de uma identidade comum e a aproximação entre os demais países da região em torno dos temas de segurança. O objetivo desse trabalho é avaliar a evolução da SADC ao longo dos anos 90 e 2000 no tocante aos aspectos securitários, visando analisar em que medida a organização contribuiu ou não para a resolução dos problemas políticos e de segurança da região, em especial nos momentos de crise. A análise será concentrada na criação e nas modificações do Órgão para a Cooperação em Política, Defesa e Segurança (OPDS da Comunidade para o Desenvolvimento da África Austral (SADC. A hipótese central do trabalho é de que a SADC, e o OPDS em específico, constituem a principal esfera de tratamento das questões securitárias da África Austral e, ao longo dos anos, contribuiu para evolução da resolução desses problemas. O trabalho irá utilizar a revisão bibliográfica e documental, adotando uma abordagem histórica, visando uma comparação temporal do caso em questão.

  20. Nuevos registros de plantas micoheterótrofas aclorofiladas para la provincia de Corrientes, Argentina

    Directory of Open Access Journals (Sweden)

    Ernesto R. Krauczuk

    2013-07-01

    Full Text Available Se presentan nuevos registros de plantas micoheterótrofas aclorofiladas para la provincia de Corrientes, Argentina. Sobre la base de especímenes de herbario recolectados en el territorio de la provincia de Corrientes, Argentina, se documenta por primera vez la presencia de tres especies de plantas micoheterótrofas sin clorofila. Las especies son ilustradas mediante fotografías y se brinda información ecológica sobre los sitios donde las plantas fueron halladas.

  1. Planeamiento estratégico de la Provincia de Arequipa 

    OpenAIRE

    Morales Chalco, Raúl; Ojeda Herrera, Daniel Eduardo; Ojeda Yauri, Rafael Christhian; Rojas Carrera, Alejandro

    2016-01-01

    La provincia de Arequipa, es la segunda más desarrollada a nivel de todo el Perú. Presenta una serie de actividades económicas diversificadas orientadas a los sectores como: minería, construcción, servicios, agricultura principalmente. En los últimos años desde el 2008 hasta el 2014, la provincia ha presentado un crecimiento de su PBI en un 8% en promedio, sin embargo, el mercado internacional asiático ha disminuido la demanda de compra de cobre, la coyuntura del gobierno de Ollanta Humala, y...

  2. Organización del Territorio de la Provincia de Sandia

    OpenAIRE

    Quispe Hurtado Nicolás

    2007-01-01

    La provincia de Sandia, está ubicada en la parte Nor-oriental del departamento de Puno, abarca una superficie de 11862.41 Km2. (16.5% de la extensión departamental), constituye una de las provincias de mayor extensión, después de Carabaya, cuenta con 50,895 habitantes (1993), de las cuales el 76.4% es rural y 23.6 % es urbana; según proyecciones por INEI para 2005 se estima 58359 habitantes, con tasa de crecimiento de 1.1 %. Políticamente está conformado por 10 distritos, los cuales no cuenta...

  3. Permanecer en el tiempo: el caso del Banco Provincia Casa Matriz 1885-2015

    OpenAIRE

    Carbonari, Fabiana Andrea; Bonicatto, Virginia; Grandis, María Belén de

    2015-01-01

    El presente artículo se inscribe en el plan de trabajo de la Beca Interna de Entrenamiento en Investigación de la FAU denominada Italianos en la ciudad de La Plata. El caso del Banco Provincia de la ciudad de La Plata que, durante el ciclo lectivo 2015 desarrolla la Arq. María Belén de Grandis con dirección de la Esp. Arq. Fabiana Carbonari y Codirección de la Dra. Arq. Virginia Bonicatto. La misma tiene por objetivo realizar el estudio histórico sistemático del Banco de la Provincia de Bueno...

  4. Climate and sea-level changes across a shallow marine Cretaceous–Palaeogene boundary succession in Patagonia, Argentina

    NARCIS (Netherlands)

    Vellekoop, Johan; Holwerda, Femke; Prámparo, Mercedes B.; Willmott, Veronica; Schouten, Stefan; Cúneo, Nestor R.; Scasso, Roberto A.; Brinkhuis, Henk

    2017-01-01

    Upper Maastrichtian to lower Paleocene, coarse-grained deposits of the Lefipán Formation in Chubut Province, (Patagonia, Argentina) provide an opportunity to study environmental changes across the Cretaceous–Palaeogene (K–Pg) boundary in a shallow marine depositional environment. Marine

  5. Sweet cherries from the end of the world: options and constraints for fruit production systems in South Patagonia, Argentina

    NARCIS (Netherlands)

    Cittadini, E.D.

    2007-01-01

    In South Patagonia, development of the fruit production sector has been almost exclusively based on the production of sweet cherry, with an area increase from 176 ha in 1997 to 578 ha at the end of 2006. These orchards are designed as intensive systems and oriented to export markets. Even though

  6. Inter-subjectivity and Domestication in the Making of a Global Region: Territorialization of Salmon in the Chilean Patagonia.

    NARCIS (Netherlands)

    Blanco, Gustavo; Arce, A.M.G.; Fisher, E.F.

    2016-01-01

    This article examines transformations in the Chilean Patagonia, a region that has become a world leader in Salmon production for global markets. Employing ethnographic methods, this study examines the possibilities of considering inter-subjectivities in the processes of conforming important regions

  7. Eastern Andean environmental and climate synthesis for the last 2000 years BP from terrestrial pollen and charcoal records of Patagonia

    Science.gov (United States)

    Sottile, G. D.; Echeverria, M. E.; Mancini, M. V.; Bianchi, M. M.; Marcos, M. A.; Bamonte, F. P.

    2015-06-01

    The Southern Hemisphere Westerly Winds (SWW) constitute an important zonal circulation system that dominates the dynamics of Southern Hemisphere mid-latitude climate. Little is known about climatic changes in the Southern South America in comparison to the Northern Hemisphere due to the low density of proxy records, and adequate chronology and sampling resolution to address environmental changes of the last 2000 years. Since 2009, new pollen and charcoal records from bog and lakes in northern and southern Patagonia at the east side of the Andes have been published with an adequate calibration of pollen assemblages related to modern vegetation and ecological behaviour. In this work we improve the chronological control of some eastern Andean previously published sequences and integrate pollen and charcoal dataset available east of the Andes to interpret possible environmental and SWW variability at centennial time scales. Through the analysis of modern and past hydric balance dynamics we compare these scenarios with other western Andean SWW sensitive proxy records for the last 2000 years. Due to the distinct precipitation regimes that exist between Northern (40-45° S) and Southern Patagonia (48-52° S) pollen sites locations, shifts on latitudinal and strength of the SWW results in large changes on hydric availability on forest and steppe communities. Therefore, we can interpret fossil pollen dataset as changes on paleohydric balance at every single site by the construction of paleohydric indices and comparison to charcoal records during the last 2000 cal yrs BP. Our composite pollen-based Northern and Southern Patagonia indices can be interpreted as changes in latitudinal variation and intensity of the SWW respectively. Dataset integration suggest poleward SWW between 2000 and 750 cal yrs BP and northward-weaker SWW during the Little Ice Age (750-200 cal yrs BP). These SWW variations are synchronous to Patagonian fire activity major shifts. We found an in phase

  8. Ground level and Lidar monitoring of volcanic dust and dust from Patagonia

    Science.gov (United States)

    Otero, L. A.; Losno, R.; Salvador, J. O.; Journet, E.; Qu, Z.; Triquet, S.; Monna, F.; Balkanski, Y.; Bulnes, D.; Ristori, P. R.; Quel, E. J.

    2013-05-01

    A combined approach including ground level aerosol sampling, lidar and sunphotometer measurements is used to monitor suspended particles in the atmosphere at several sites in Patagonia. Motivated by the Puyehue volcanic eruption in June 2011 two aerosol monitoring stations with several passive and active instruments were installed in Bariloche and Comodoro Rivadavia. The main goal which is to monitor ground lifted and transported ashes and dust involving danger to civil aviation, is achieved by measuring continuously aerosol concentration at ground level and aerosol vertical distribution using lidar. In addition, starting from December 2011, continuous series of weekly accumulated aerosol concentrations at Rio Gallegos are being measured to study the impact of Patagonian dust over the open ocean on phytoplankton primary productivity and CO2 removal. These measurements are going to be coupled with LIDAR monitoring and a dust optical response models to test if aerosol extrapolation can be done from the ground to the top of the layer. Laboratory chemical analysis of the aerosols will include elemental composition, solubilisation kinetic and mineralogical determination. Expected deliverables for this study is the estimation of the amount of dust exported from Patagonia towards the South Atlantic, its chemical properties, including bioavailability simulation, from model and comparison to experimental measurements.

  9. Episodic Jurassic to Lower Cretaceous intraplate compression in Central Patagonia during Gondwana breakup

    Science.gov (United States)

    Navarrete, César; Gianni, Guido; Echaurren, Andrés; Kingler, Federico Lince; Folguera, Andrés

    2016-12-01

    From Lower Jurassic to Lower Cretaceous, several intraplate compression events affected discrete sectors of Central Patagonia, under a general context of crustal extension associated with Gondwana breakup. This was demonstrated by means of 2D and 3D seismic and borehole data, which show partial inversion of Lower and Middle Jurassic extensional structures of the Chubut and Cañadón Asfalto basins, during the earliest stages of breakup. A comparison with surrounding areas in Patagonia, where similar Jurassic intraplate compression was described, allowed the discrimination of three discrete pulses of subtle compression (C1: ∼188-185 Ma; C2: ∼170-163; C3: ∼157-136? Ma). Interestingly, episodic intraplate compressional events are closely followed by high flux magmatic events linked to the westward expansion of the Karoo-Ferrar thermal anomaly, which impacted on the lithosphere of southwest Gondwana in Lower Jurassic. In addition, we determined the approximate direction of the main compressive strain (σ1) compatible with other Jurassic intraplate belts of South America. These observations led us to propose a linkage between a thermo mechanically weakened continental crust due to LIPs activity, changes in plate motions and ridge-push forces generated by the opening of the Weddell Sea, in order to explain intraplate shortening, interrupted while Karoo LIPs magmatic invigoration took place.

  10. Saccharomyces eubayanus and Saccharomyces uvarum associated with the fermentation of Araucaria araucana seeds in Patagonia.

    Science.gov (United States)

    Rodríguez, M Eugenia; Pérez-Través, Laura; Sangorrín, Marcela P; Barrio, Eladio; Lopes, Christian A

    2014-09-01

    Mudai is a traditional fermented beverage, made from the seeds of the Araucaria araucana tree by Mapuche communities. The main goal of the present study was to identify and characterize the yeast microbiota responsible of Mudai fermentation as well as from A. araucana seeds and bark from different locations in Northern Patagonia. Only Hanseniaspora uvarum and a commercial bakery strain of Saccharomyces cerevisiae were isolated from Mudai and all Saccharomyces isolates recovered from A. araucana seed and bark samples belonged to the cryotolerant species Saccharomyces eubayanus and Saccharomyces uvarum. These two species were already reported in Nothofagus trees from Patagonia; however, this is the first time that they were isolated from A. araucana, which extends their ecological distribution. The presence of these species in A. araucana seeds and bark samples, led us to postulate a potential role for them as the original yeasts responsible for the elaboration of Mudai before the introduction of commercial S. cerevisiae cultures. The molecular and genetic characterization of the S. uvarum and S. eubayanus isolates and their comparison with European S. uvarum strains and S. eubayanus hybrids (S. bayanus and S. pastorianus), allowed their ecology and evolution us to be examined. © 2014 Federation of European Microbiological Societies. Published by John Wiley & Sons Ltd. All rights reserved.

  11. Flavonols, alkaloids, and antioxidant capacity of edible wild berberis species from patagonia.

    Science.gov (United States)

    Ruiz, Antonieta; Zapata, Moises; Sabando, Constanza; Bustamante, Luis; von Baer, Dietrich; Vergara, Carola; Mardones, Claudia

    2014-12-24

    There are 20 species of the Berberidaceae family described in Chile, whose fruits are edible and show high anthocyanin and hydroxycinnamic acid levels. Berberis microphylla G. Forst, commonly known as calafate, is the most extensively distributed. Flavonols and alkaloids in seed, pulp, skin, and whole calafate berry extracts and other Berberis were studied using HPLC-DAD-ESI-MS/MS and HPLC with fluorescence detector. Berry samples from different locations in Chilean Patagonia, including different phenological stages, were systematically addressed. Results were compared with other organs of the plant and with other Berberis species. Total flavonol concentration in calafate (n = 65) was 1.33 ± 0.54 μmol/g. Glycosyl metabolites of quercetin and isorhamnetin were the most abundant. Similar profiles were observed in calafate from distinct locations, but important differences were observed for the other edible Berberis species. Calafate pulp and skin have higher flavonol concentrations than seeds, and the maturation process reduced its levels. TEACCUPRAC and TEACABTS of whole calafate extracts and fractions are also explored. Finally, only berberine was detected in the fruit (0.001%), mainly in seeds. Results contribute to the promotion of this berry as a superfruit from Patagonia.

  12. Evaluation of an indirect elisa for the diagnosis of bovine brucellosis in Patagonia, Argentina

    International Nuclear Information System (INIS)

    Uzal, F.A.; Carrasco, E.A.; Robles, C.A.; Echaide, S.

    1998-01-01

    Control and eradication of bovine brucellosis is usually based on the serological detection of antibodies. In Argentina, the Rose Bengal test (RB) and the Buffered Plate antigen test (BPA) are the two screening test officially recognized, while the 2-mercaptoethanol test (2ME) and the Tube Agglutination test (SAT) are the confirmatory assays currently in use. In order to improve the serological diagnosis of bovine brucellosis in Patagonia, Argentina, an indirect ELISA kit produced by the Joint FAO/IAEA Division was evaluated. Sera from negative non-vaccinated, negative but vaccinated and positive animals were tested by all the above techniques. The specificity of the I-ELISA (99.6% and 99.7%) was similar to that of the BPA, RB, 2ME and Complement Fixation test (CF) when used to test sera from non-vaccinated, negative and vaccinated, negative animals, respectively. The sensitivity of the I-ELISA (98%) was higher than the BPA test (96%) and the CF test (95,2%). The I-ELISA kit evaluated in this study was thought to be a valuable tool for the diagnosis of bovine brucellosis in Patagonia region where little epidemiological information is available about this disease and where large numbers of sera should be tested to obtain such information. (author)

  13. Little Ice Age advance and retreat of Glaciar Jorge Montt, Chilean Patagonia

    Directory of Open Access Journals (Sweden)

    A. Rivera

    2012-03-01

    Full Text Available Glaciar Jorge Montt (48°20' S/73°30' W, one of the main tidewater glaciers of the Southern Patagonian Icefield (SPI, has experienced the greatest terminal retreat observed in Patagonia during the past century, with a recession of 19.5 km between 1898 and 2011. This retreat has revealed trees laying subglacially until 2003. These trees were dated using radiocarbon, yielding burial ages between 460 and 250 cal yrs BP. The presence of old growth forest during those dates indicates that Glaciar Jorge Montt was upvalley of its present position before the commonly recognized Little Ice Age (LIA period in Patagonia. The post-LIA retreat was most likely triggered by climatically induced changes during the 20th century; however, Glaciar Jorge Montt has responded more dramatically than its neighbours. The retreat of Jorge Montt opened a 19.5 km long fjord since 1898, which reaches depths in excess of 390 m. The bathymetry is well correlated with glacier retreat rates, suggesting that dynamic responses of the glacier are at least partially connected to near buoyancy conditions at the ice front, resulting in high calving fluxes, accelerating thinning rates and rapid ice velocities.

  14. Impact of ice melting on distribution of particulate sterols in glacial fjords of Chilean Patagonia

    Science.gov (United States)

    Gutiérrez, Marcelo H.; Riquelme, Pablo; Pantoja, Silvio

    2016-04-01

    We analyzed variability in abundance and composition of sterols in waters of the fjord adjacent to glacier Jorge Montt, one of the fastest retreated glaciers in Patagonian Icefields. The study was carried out between August 2012 and November 2013 under different meltwater scenarios. Distribution of sterols in surface and bottom waters was determined by Gas Chromatography coupled to Mass Spectrometry. Sterol concentration ranged from 18 to 1726 ng/L in surface and bottom waters and was positive correlated with chlorophyll-a concentration. Under high melting conditions in austral summer, surface meltwaters showed high concentrations of sterols and were dominated by methylene-cholesterol, a representative sterol of centric diatoms. In the area near open ocean and in austral autumn, winter and spring in proglacial fjord, lower sterol concentrations in surface waters were accompanied by other microalgae sterols and an increase in relative abundance of plant sterols, evidencing a different source of organic matter. In autumn, when high meltwater flux was also evidenced, presence of stanols and an uncommon tri-unsaturated sterol suggests influence of meltwaters in composition of sterols in the downstream fjord. We conclude that ice melting can modify sterol composition by setting conditions for development of a singular phytoplankton population able to thrive in surface meltwater and by carrying glacier organic matter into Patagonian glacial fjords. In projected ice melting scenario, these changes in organic matter quantity and quality can potentially affect availability of organic substrates for heterotrophic activity and trophic status of glacial fjords. This research was funded by COPAS Sur-Austral (PFB-31)

  15. Temperature decrease in the extratropics of South America in response to a tropical forcing during the austral winter

    Energy Technology Data Exchange (ETDEWEB)

    Mueller, G.V. [Centro de Investigaciones Cientificas y Transferencia de Tecnologia a la Produccion (CICYTTP-CONICET), Diamante, Entre Rios (Argentina)

    2010-07-01

    This paper focuses on the dynamic mechanisms that create favorable conditions for the occurrence of frosts that affect large areas of Argentina and are denominated generalized frosts (GF). The hemispheric teleconnection patterns linked to extreme cold events affecting central and northeastern Argentina during winter are identified. The objective is to determine whether the conditions found in previous studies for the composite of winters with extreme (maximum and minimum) frequency of GF occurrence respond to typical characteristics of the austral winter or they are inherent to those particular winters. Taking the mean winter as basic state in the 1961-1990 period, a series of numerical experiments are run using a primitive equation model in which waves are excited with a thermal forcing. The positions of the thermal forcing are chosen according to observed convection anomalies in a basic state given by the austral winters with extreme frequency of GF occurrence. The wave trains excited by anomalous convection situated in specific regions may propagate across the Pacific Ocean and reach South America with the appropriate phase, creating the local favorable conditions for the occurrence of GF. However, the anomalous convection is, by itself, not sufficient since the response also depends on the basic state configuration. This is proved by placing the forcing over the region of significant anomalous convection for maximum and minimum frequency of GF occurrence and the response was very different in comparison to the mean winter. It is concluded that the conditions for a greater GF frequency of occurrence are inherent to these particular winters, so that such conditions are not present in the average winter. (orig.)

  16. The Tunas Formation (Permian) in the Sierras Australes foldbelt, east central Argentina: evidence for syntectonic sedimentation in a foreland basin

    Science.gov (United States)

    Lopez-Gamundi, O. R.; Conaghan, P. J.; Rossello, E. A.; Cobbold, P. R.

    1995-04-01

    The Tunas Formation, extensively exposed in the Sierras Australes foldbelt of eastern central Argentina, completes the sedimentation of the Gondwanan (Late Carboniferous-Permian) sequence, locally known as the Pillahuincó Group. The underlying units of the Group show an integrated depositional history which can be explained in terms of glaciomarine sedimentation (Sauce Grande Formation) and postglacial transgression (Piedra Azul and Bonete Formations). This succession also has a rather uniform quartz-rich, sand-sized composition indicative of a cratonic provenance from the Tandilia Massif to the northeast. Early to Late Permian deformation folded and thrusted the southwestern basin margin (Sierras Australes) and triggered the deposition of a 1,500 m — thick, synorogenic prograding wedge, the Tunas Formation, in the adjacent foreland basin (Sauce Grande or Claromecó Basin). Sandstone detrital modes for the Tunas deposits show moderate to low contents of quartz and abundant lithics, mostly of volcanic and metasedimentary origin. Paleocurrents are consistently from the SW. Tuffs interbedded with sandstones in the upper half of Tunas Formation (Early — early Late? Permian) are interpreted as being derived from volcanic glass-rich tuffs settled in a body of water. Extensive rhyolitic ignimbrites and consanguineous airborne tuffaceous material erupted in the northern Patagonian region during that period. The age constraints and similarities in composition between these volcanics and the tuffaceous horizons present in the Sauce Grande, Parana and Karoo Basins suggest a genetic linkage between these two episodes. The intimate relationship between volcanic activity inboard of the paleo-Pacific margin, deformation in the adjacent orogenic belt and subsidence and sedimentation in the contiguous foreland basin constitutes a common motif in the Sauce Grande and Karoo Basins of southwestern Gondwana.

  17. Estimation of austral summer net community production in the Amundsen Sea: Self-organizing map analysis approach

    Science.gov (United States)

    Park, K.; Hahm, D.; Lee, D. G.; Rhee, T. S.; Kim, H. C.

    2014-12-01

    The Amundsen Sea, Antarctica, has been known for one of the most susceptible region to the current climate change such as sea ice melting and sea surface temperature change. In the Southern Ocean, a predominant amount of primary production is occurring in the continental shelf region. Phytoplankton blooms take place during the austral summer due to the limited sunlit and sea ice cover. Thus, quantifying the variation of summer season net community production (NCP) in the Amundsen Sea is essential to analyze the influence of climate change to the variation of biogeochemical cycle in the Southern Ocean. During the past three years of 2011, 2012 and 2014 in austral summer, we have conducted underway observations of ΔO2/Ar and derived NCP of the Amundsen Sea. Despite the importance of NCP for understanding biological carbon cycle of the ocean, the observations are rather limited to see the spatio-temporal variation in the Amundsen Sea. Therefore, we applied self-organizing map (SOM) analysis to expand our observed data sets and estimate the NCP during the summer season. SOM analysis, a type of artificial neural network, has been proved to be a useful method for extracting and classifying features in geoscience. In oceanography, SOM has applied for the analysis of various properties of the seawater such as sea surface temperature, chlorophyll concentration, pCO2, and NCP. Especially it is useful to expand a spatial coverage of direct measurements or to estimate properties whose satellite observations are technically or spatially limited. In this study, we estimate summer season NCP and find a variables set which optimally delineates the NCP variation in the Amundsen Sea as well. Moreover, we attempt to analyze the interannual variation of the Amundsen Sea NCP by taking climatological factors into account for the SOM analysis.

  18. Analysis of [Gossypium capitis-viridis × (G.hirsutum × G.australe2] Trispecific Hybrid and Selected Characteristics.

    Directory of Open Access Journals (Sweden)

    Di Chen

    Full Text Available Speciation is always a contentious and challenging issue following with the presence of gene flow. In Gossypium, there are many valuable resources and wild diploid cotton especially C and B genome species possess some excellent traits which cultivated cotton always lacks. In order to explore character transferring rule from wild cotton to upland tetraploid cotton, the [G. capitis-viridis × (G. hirsutum × G. australe2] triple hybrid was synthesized by interspecies hybridization and chromosome doubling. Morphology comparisons were measured among this hybrid and its parents. It showed that trispecific hybrid F1 had some intermediate morphological characters like leaf style between its parents and some different characters from its parents, like crawl growth characteristics and two kind flower color. It is highly resistant to insects comparing with other cotton species by four year field investigation. By cytogenetic analysis, triple hybrid was further confirmed by meiosis behavior of pollen mother cells. Comparing with regular meiosis of its three parents, it was distinguished by the occurrence of polyads with various numbers of unbalanced microspores and finally generating various abnormal pollen grains. All this phenomenon results in the sterility of this hybrid. This hybrid was further identified by SSR marker from DNA molecular level. It showed that 98 selected polymorphism primers amplified effective bands in this hybrids and its parents. The genetic proportion of three parents in this hybrid is 47.8% from G. hirsutum, 14.3% from G. australe, 7.0% from G. capitis-viridis, and 30.9% recombination bands respectively. It was testified that wild genetic material has been transferred into cultivated cotton and this new germplasm can be incorporated into cotton breeding program.

  19. Respuesta dietaria de tres rapaces frente a una presa introducida en Patagonia Dietary response of three raptor species to an introduced prey in Patagonia

    Directory of Open Access Journals (Sweden)

    ANA L. MONSERRAT

    2005-09-01

    Full Text Available Los depredadores de marcada respuesta funcional pueden poseer la capacidad de estabilizar las poblaciones de sus presas, lo cual es destacable en el caso de presas introducidas, que suelen causar impactos negativos en los ecosistemas nativos y las actividades agropecuarias. La situación actual de la Patagonia es crítica respecto a la introducción de especies. Estudios previos indican que los depredadores nativos exhiben un cambio general en sus dietas debido a la introducción de presas exóticas que están reemplazando a sus presas originales. Determinamos los hábitos alimenticios del águila (Geranoaetus melanoluecus, el búho magallánico (Bubo magellanicus y el aguilucho común (Buteo polyosoma, tres de las principales aves depredadoras de la liebre europea (Lepus europaeus, introducida en el noroeste de Patagonia. Para esto analizamos 321, 115 y 78 egagrópilas de águila, búho y aguilucho respectivamente. Evaluamos las respuestas funcionales a la densidad de liebre europea y comparamos las dietas entre sitios diferentes. Las principales presas del aguilucho y del búho fueron los roedores sigmodontinos y en segundo lugar los tuco-tucos (Ctenomys spp.. El águila consumió principalmente liebres y en segundo lugar tuco-tucos, presentando una respuesta funcional significativa para la presa introducida. La dieta de este rapaz fue diferente entre sitios con alta y baja densidad de liebres. Para los otros dos rapaces no encontramos una respuesta funcional significativa para la liebre europea, pero la dieta del aguilucho varió en función del sitio geográfico. Concluimos que tanto el águila mora como el aguilucho se alimentan de manera generalista, siendo el búho el único de los tres rapaces con tendencia especialista sobre pequeños roedores. Por otra parte, la variación de la dieta del águila en función de la densidad de liebre europea le brinda el potencial de contribuir a la regulación de las poblaciones de la misma

  20. provincia de Buenos Aires (República Argentina

    Directory of Open Access Journals (Sweden)

    Rubén Alberto Cervini

    2008-01-01

    Full Text Available En el estudio que se informa se investigaron las relaciones entre progreso de aprendizaje (valor agregado, motivación y autoconcepto académico del alumno en Matemática, en el marco de los efectos de las características socioeconómicas y académicas del alumno y de su escuela. Para la medición del valor agregado se utilizaron los resultados de dos pruebas estandarizadas de Matemática aplicadas a una cohorte de alumnos de la Provincia de Buenos Aires (República Argentina en dos momentos diferentes (séptimo y noveno años de Educación General Bási ca - EGB. Las mediciones de motivación y de autoconcepto se basaron en respuestas a ítemes binarios de actitudes con respecto a Ma temática y fueron definidas utilizando el análisis de la componente prin - cipal, a partir de la matriz de correlación tetracórica (método heurístico. Para el análisis de las correlaciones se utilizó la téc nica estadística de modelos multinivel. El presente estudio relaciona los resultados empíricos con la teoría del habitus de Bourdieu. Inicialmente, el autoconcepto resulta significativa y positivamente asociado con el puntaje en la prueba y con el progreso de aprendizaje posterior. Este efecto continúa siendo significati vo aun cuando se controlan los efectos del nivel socioeconómi - co y del género del alumno. Sin embargo, su capacidad ex plicativa es muy tenue desde el punto de vista práctico. Si bien este resultado confirmaría la hipótesis central de la teoría de la reproducción, indica un sendero a través del cual podrían producirse transformaciones. Uno de los desafíos del sistema educativo es promover el habitus escolar cultivado (autoconcepto más allá de las determinaciones sociales, culturales y económicas.

  1. Nueva especie de Planorbidae (Gastropoda: Basommatophora en la Patagonia chilena: Biomphalaria cristiani sp. nov. First record of Planorbidae (Mollusca: Basommatophora in Chilean Patagonia: Biomphalaria cristiani sp. nov.

    Directory of Open Access Journals (Sweden)

    Carmen Fuentealba

    2012-11-01

    Full Text Available En Chile la familia Planorbidae está representada por el género Biomphalaria Preston, 1910, compuesta por siete especies distribuidas desde Isluga hasta el río Puelo. De estas especies, solo B.peregrina, ampliamente distribuida en el neotrópico, y Biomphalaria aymara de Isluga, han sido reconocidas sobre la base de la morfología del sistema reproductor y la rádula, caracteres que fueron utilizados en el presente estudio para diferenciar a Biomphalaria cristiani como nueva especie del grupo y primer registro de la familia en la Patagonia chilena, ampliando su actual rango de distribución. Los caracteres que permiten la diagnosis de B. cristiani son el saco vaginal vestigial truncado, ausencia del desarrollo de los músculos suspensores del pene, vaina del pene corta en relación al prepucio, oviducto largo en relación al espermioducto y vaso deferente más delgado y largo que la vaina del pene, de tamano similar al prepucio. La localidad tipo de Biomphalaria cristiani sp. nov. es Laguna Cisnes (47°7'10.02"S, 72°27'40.65"W, región de Aysén.The family Planorbidae in Chile is represented by the genus Biomphalaria Preston, 1910, consisting of seven species distributed from Isluga to Puelo River. Of these species, only Biomphalaria peregrina widely distributed in the neotropical and Biomphalaria aymara from Isluga are recognized based on the morphology of the reproductive system and radula, characters that were used in the following study to differentiate Biomphalaria cristiani as a new species of this group and first record of the family in Chilean Patagonia, extending its current distribution range. The characters for the diagnosis of B. cristiani are: truncated vestigial vaginal pouch, lack of development of the penis retractor muscles, penis sheath shorter than the prepuce, oviduct longer than the spermiduct and vas deferens thinner and longer than the penis sheath, similar size to the prepuce. The type locality of B. cristiani nov. sp

  2. Combined U-Pb SHRIMP and Hf isotope study of the Late Paleozoic Yaminué Complex, Rio Negro Province, Argentina: Implications for the origin and evolution of the Patagonia composite terrane

    Directory of Open Access Journals (Sweden)

    Carlos J. Chernicoff

    2013-01-01

    Combining geological and isotope data, as well as geophysical models, we identify the Yaminué Complex within the La Esperanza-Yaminué crustal block flanked by two other, distinct crustal blocks: the Eastern block which forms part of the Patagonia terrane sensu stricto, located in the eastern Patagonian region, and the Western block forming part of the Southern Patagonia terrane. Their origins and timing of amalgamation to form the Patagonia composite terrane are also discussed.

  3. Estado actual del conocimiento de la familia Ceratopogonidae en la Patagonia (Diptera: Nematocera

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    Gustavo R. SPINELLI

    2009-01-01

    Full Text Available Ceratopogonidae incluye pequeños dípteros nematocerosque crían en hábitats acuáticos o semiacuáticos. Hasta los ‘80, el conocimiento de su taxonomía en la Patagonia se hallaba limitado a la contribución de los comienzos de los ‘30 de Ingram y Macfie, sobre la base de material capturado en 1926-27, en el área del Parque Nacional Nahuel Huapi y zonas vecinasde Chile. En los últimos 25 años, se pusieron en marcha diferentes proyectos, resultando la descripción o registro de numerosos taxones para la región. Si se contabilizan los datos publicados, 102 especies habitan en la Patagonia, de las cuales 86 (84,31% son endémicas para la región. Este alto porcentaje es evidente en los bosques de Nothofagus, con 71 especies endémicas de estebioma, nueve lo son de la estepa y seis presentan registros en bosque y estepa. Datos aún no publicados concuerdan con este esquema. Diecinueve géneros están representados en la Patagonia, diez de ellos con amplia distribución,tres de distribución transantártica y seis son endémicos para el área. Para la misma, se hallan publicadas las revisiones de Forcipomyia, Atrichopogon, Borkenthelea, Macrurohelea y Paradasyhelea; se han finalizado y aún no publicado aquellas de Dasyhelea y Palpomyia, está muy avanzada la de Stilobezzia y se prevé comenzar con las de Austrohelea, Austrosphaeromias, Physohelea y Bezzia. Se calcula que estos datos no divulgados contienen al menos 55 especies todavía no descriptas. Con respecto a los aspectos biogeográficos se pueden destacar estudios que tienden a establecer relaciones entre las áreas reconocidas en esquemas biogeográficos propuestos para la región andina.

  4. Slab-derived components in the subcontinental lithospheric mantle beneath Chilean Patagonia: Geochemistry and Sr-Nd-Pb isotopes of mantle xenoliths and host basalt

    Science.gov (United States)

    Jalowitzki, Tiago; Gervasoni, Fernanda; Conceição, Rommulo V.; Orihashi, Yuji; Bertotto, Gustavo W.; Sumino, Hirochika; Schilling, Manuel E.; Nagao, Keisuke; Morata, Diego; Sylvester, Paul

    2017-11-01

    modified oceanic crust throughout the initial stages of the Farallón-Aluk ridge collision during Paleocene to Eocene time. However, based on the tectonic evolution of southern South America, we cannot exclude the influence of long-lived subduction events beneath south Patagonia. Although we believe that the studied samples were brought to the surface in this geodynamic context, there is no evidence that ocean island basalt (OIB)-like melts related to the Farallón-Aluk asthenospheric slab window affected the peridotite composition. The host alkaline basalt is a single unit with a HIMU-like OIB signature characterized by marked positive Nb-Ta anomalies coupled with negative anomalies in highly incompatible and fluid-mobile elements (Rb, K, Pb, and Sr). The compositional similarity between the HIMU-like OIB mantle source and the host basalt is also evident from trace element ratios [(Ba-Th-K-La-Zr)/Nb] as well as by the low 87Sr/86Sri (0.703039-0.703058) and relatively high 143Nd/144Ndi (0.512880-0.512874) and 206Pb/204Pb (19.333-19.389) isotopic ratios. The low 206Pb/204Pb ratios compared to end-member HIMU lavas (e.g., Sta. Helena and the Cook-Austral Islands) suggest that this region was modified by processes associated with a prolonged period of subduction related to the Andean orogenesis and the recycling of several oceanic plates beneath the continent, following the Mesozoic breakup of Gondwana or an even older subduction-related event with young recycling ages (< 2 Ga).

  5. El mito de pristinidad y los usos efectivos del territorio de la región de Magallanes, Patagonia Chilena: Forestal, minería y acuicultura

    Directory of Open Access Journals (Sweden)

    Inostroza, Luis

    2015-06-01

    Full Text Available The current classification methods of land use in remote regions have two serious limitations. The first is the conceptual mixture between land uses and covers, which does not reflect the actual direct use of land. A second limitation is the absence of important uses such as tourism, aquaculture and mining, which impose significant pressures on fragile territories. This paper presents a land use classification method developed specifically for the region of Magellan in the extreme south of Chile. It is a land use classification wide and conceptually clear, which allows an effective determination of the range of land exploitations in Patagonia, determining which areas are used and which remain unused. The method is based entirely on a GIS and is a key input for improving land management. The analysis shows a high percentage of direct use, contrary to the existing pristine perception, which imposes significant challenges for current land management strategies.Los métodos de clasificación de usos del suelo en regiones remotas presentan dos serias limitaciones. La primera es la mixtura conceptual de usos con coberturas que no refleja el uso efectivo del territorio. Una segunda limitación es la ausencia de usos importantes como turismo, acuicultura y minería, que imponen importantes presiones sobre territorios frágiles. Este trabajo presenta un método para determinar los usos territoriales en la región de Magallanes en el extremo austral de Chile. Se trata de una clasificación de usos del suelo elaborada específicamente para este territorio, conceptualmente clara y amplia, que permite establecer el alcance efectivo de las explotaciones territoriales, determinando qué territorios son utilizados y cuales permanecen sin uso. El método está basado íntegramente en un SIG y constituye un insumo clave para mejorar la gestión territorial. El análisis refleja un alto porcentaje de uso directo, contrario a la percepción de pristinidad existente

  6. Mio-Pliocene glaciations of Central Patagonia: New evidence and tectonic implications Glaciaciones mio-pliocenas en Patagonia central: nueva evidencia e implicancias tectónicas

    Directory of Open Access Journals (Sweden)

    Yves Lagabrielle

    2010-07-01

    Full Text Available Patagonia is well known for spectacular oceurrences of a variety of glacial-derived landforms and deposits and for a long history of ancient glaciations. In this paper, we first review the diverse evidence that demonstrates the development of glacial-related sedimentary units within the Central Patagonian Cordillera since 7 Ma. Well preserved glacial landforms at the top surface of mesetas on both sides of the Lago General Carrera-Buenos Aires are described: the Meseta Guenguel to the north, and the volcanic Meseta del Lago Buenos Aires to the south. The latter meseta corresponds to a 3 Ma old, morphologically inverted paleo-piedmont, based on Ar/Ar dates of the uppermost lava flows. It shows evidence of glacier advances to the NE direction. Over a distance of 20 km, glacial landforms observed by remote sensing data and digital elevation model define glacial tongues that were fed by the Cordillera reliefs to the west. These lobes are now beheaded from their westward sources along a morpho-structural corridor that bounds the Meseta del Lago Buenos Aires to the west. These remnants can be correlated with the oldest glacial landforms recognized north of Lago General Carrera-Buenos Aires, on the Meseta Guenguel that form the Chipanque moraine system. From these features it is concluded that the glacial drainage network of Central Patagonia has been strongly modified following relief inversion in response to erosion processes and to tectonic causes. Changes occurred after 3 Ma, from a smooth piedmont surface covered by an extensive ice mantle ending with ampie glacial lobes, to the current series of deeply incised glacial valleys such as the Lago General Carrera-Buenos Aires depression. These new data bear important con-straints on the history and development of the first glaciations in southern South America.Patagonia es bien conocida por una espectacular geomorfología glacial y por una larga historia de antiguas glaciaciones. En este art

  7. A promising location in Patagonia for paleoclimate and paleoenvironmental reconstructions revealed by shallow firn core from Monte San Valentin (Northern patagonia Icefield, Chile)

    DEFF Research Database (Denmark)

    Vimeux, F.; de Angelis, M.; Ginot, P.

    2008-01-01

    temperature is -11.9°C at 10-m depth allowing to expect well preserved both chemical and isotopic signals, unperturbed by water percolation. The dating of the core, on the basis of a multi-proxy approach combining annual layer counting and radionuclide measurements, shows that past environment and climate can......The study of past climate variability from ice core investigations has been largely developed both in polar areas over the past decades and, more recently, in tropical regions, specifically along the South American Andes between 0° and 20°S. However a large gap still remains at mid......-latitudes in the Southern Hemisphere. In this framework, a 15.3-m long shallow firn core has been extracted in March 2005 from the summit plateau of Monte San Valentín (3747 m, 46°35'S, 73°19'W) in the Northern Patagonia Icefield to test its potential for paleoclimate and paleoenvironmental reconstructions. The firn...

  8. Polen de las Mieles de la Patagonia Andina (Chubut-Argentina Pollen of honeys from the Andean Patagonia (Chubut-Argentina

    Directory of Open Access Journals (Sweden)

    Alicia Forcone

    2006-07-01

    Full Text Available Se describen e ilustran mediante fotomicrografías tomadas con MO y MEB, 30 tipos polínicos, determinados en las mieles producidas en la región andina de Chubut (Patagonia Argentina. Los tipos morfológicos descriptos pertenecen a las siguientes familias: Alstroemeriaceae, Apiaceae, Buddlejaceae, Caryophyllaceae, Caprifoliaceae, Celastraceae, Clusiaceae, Convolvulaceae, Ericaceae, Elaeocarpaceae, Fabaceae, Fagaceae, Lamiaceae, Papaveraceae, Polemoniaceae, Polygalaceae, Proteaceae, Ranunculaceae, Rosaceae, Saxifragaceae, Solanaceae, Thymelaceae y Verbenaceae. La mayoría de los tipos polínicos descriptos fueron hallados en las mieles como polen de menor importancia o traza con excepción de Aristotelia chilensis y Escallonia sp., que alcanzaron la categoría de polen dominante, y de Lomatia hirsuta, hallada como polen secundario.Thirty pollen types identified in the honeys from the Andean region of Chubut are described and illustrated by means of LM and SEM photomicrographs. Pollen types belong to the following families: Alstroemeriaceae, Apiaceae, Buddlejaceae, Caryophyllaceae, Caprifoliaceae, Celastraceae, Clusiaceae, Convolvulaceae, Ericaceae, Elaeocarpaceae, Fabaceae, Fagaceae, Lamiaceae, Papaveraceae, Polemoniaceae, Polygalaceae, Proteaceae, Ranunculaceae, Rosaceae, Saxifragaceae, Solanaceae, Thymelaceae, and Verbenaceae. Most pollen types described were found in the honeys as minor important pollen or traces, except Aristotelia chilensis, Escallonia sp., which reached the category of dominant pollen, and Lomatia hirsuta, which was found as secondary pollen.

  9. Historical biogeographic analysis of the family Fanniidae (Díptera: Calyptratae, with special reference to the austral species of the genus Fannia (Diptera: Fanniidae using dispersal-vicariance analysis Análisis biogeográfico histórico de la familia Fanniidae (Diptera: Calyptratae, con referencia especial a las especies australes del genero Fannia (Diptera: Fanniidae usando análisis de dipersion-vicarianza

    Directory of Open Access Journals (Sweden)

    M. CECILIA DOMÍNGUEZ

    2011-03-01

    Full Text Available The purpose of this study was to achieve a hypothesis explaining the biogeographical history of the family Fanniidae, especially that of the species from Patagonia, the Neotropics, Australia, and New Zealand. We used "dispersal-vicariance analysis" (DIVA, an event-based parsimony method, to analyze the most parsimonious phylogenetic hypothesis for the family, obtained by Domínguez & Roig-Juñent (2008. The analysis resulted in 32800 alternative equally optimal reconstructions that indicate that the ancestor of the Fanniidae was widely distributed across different regions of the world, which along with the subsequent separation of two clades that correspond to the Laurasic and Gondwanan Landmasses allow the proposal of an older age than in previous hypothesis (Late Jurassic or early Cretaceous times instead of upper Cretaceous and a Pangeic origin for the Fanniidae. The northern hemisphere species of Fanniidae included in this study highlight the difficulty that arises when analysing with DIVA a tree with a large amount of paralogy or redundant distributions, as illustrated here with several examples. The southern hemisphere species of Fanniidae indicate a clear pattern of vicariance and dispersal consistent with the rupture of Gondwana.El propósito de este estudio fue el de obtener una hipótesis que explique la historia biogeográfica de la familia Fanniidae, especialmente la de las especies de las regiones Patagónica, Neotropical, Australiana y Neozelandesa. Se utilizó el método de "dispersión y vicarianza" (DIVA, el cual es un método de parsimonia basado en eventos para analizar el árbol filogenético más parsimonioso obtenido por Domínguez & Roig-Juñent (2008. El análisis resultó en 32800 reconstrucciones alternativas igualmente óptimas que indican que el ancestro de Fanniidae estaba ampliamente distribuido en distintas regiones del mundo, lo cual junto con la subsiguiente separación de dos clados que corresponderían a los

  10. Comparación odontométrica entre muestras femeninas de Patagonia

    OpenAIRE

    Bollini, Gabriel A.; Atencio, Juan P.; Colantonio, Sonia Edith; Mendez, Marta Graciela

    2009-01-01

    La comparación odontométrica entre individuos femeninos se halla relativamente menos desarrollada en función de considerarse que dichos individuos reflejan en menor medida las diferencias inter-poblacionales. En este trabajo se comparan los índices mesio-distal (MD) y vestíbulo-lingual (VL) en 24 cráneos adultos-maduros correspondientes a muestras arqueológicas de las provincias de Río Negro y Santa Cruz. Se ha analizado las variación para la mayoría de las piezas dentarias (se exceptuaron in...

  11. Timing of the deglaciation in southern Patagonia: Testing the applicability of K-Feldspar IRSL

    DEFF Research Database (Denmark)

    Blomdin, Robin; Murray, Andrew S.; Thomsen, Kristina Jørkov

    2012-01-01

    need evaluation against an absolute chronology. The aim of this project is to investigate the applicability of OSL dating to sediments from southern Patagonia; in particular, we examine the dating potential of K-feldspar IRSL signals. Samples were collected from landforms interpreted as being deposited...... to our individual dose estimates based on the over-dispersion (OD) observed in laboratory gamma dose recovery experiments (22% for small aliquots and 18% for single grains). Then the possible effects of incomplete bleaching and differential fading are examined. For our natural samples we observe...... environmental ODs between 30 and 130% and mean residual doses between ∼30 and 80 Gy. Minimum age models are used to identify the part of the dose population that is most likely to have been well-bleached and results from these models are compared. The models give ages that are consistent with each other...

  12. A Gigantic, Exceptionally Complete Titanosaurian Sauropod Dinosaur from Southern Patagonia, Argentina

    Science.gov (United States)

    Lacovara, Kenneth J.; Lamanna, Matthew C.; Ibiricu, Lucio M.; Poole, Jason C.; Schroeter, Elena R.; Ullmann, Paul V.; Voegele, Kristyn K.; Boles, Zachary M.; Carter, Aja M.; Fowler, Emma K.; Egerton, Victoria M.; Moyer, Alison E.; Coughenour, Christopher L.; Schein, Jason P.; Harris, Jerald D.; Martínez, Rubén D.; Novas, Fernando E.

    2014-01-01

    Titanosaurian sauropod dinosaurs were the most diverse and abundant large-bodied herbivores in the southern continents during the final 30 million years of the Mesozoic Era. Several titanosaur species are regarded as the most massive land-living animals yet discovered; nevertheless, nearly all of these giant titanosaurs are known only from very incomplete fossils, hindering a detailed understanding of their anatomy. Here we describe a new and gigantic titanosaur, Dreadnoughtus schrani, from Upper Cretaceous sediments in southern Patagonia, Argentina. Represented by approximately 70% of the postcranial skeleton, plus craniodental remains, Dreadnoughtus is the most complete giant titanosaur yet discovered, and provides new insight into the morphology and evolutionary history of these colossal animals. Furthermore, despite its estimated mass of about 59.3 metric tons, the bone histology of the Dreadnoughtus type specimen reveals that this individual was still growing at the time of death. PMID:25186586

  13. Chronological study of the pre-jurassic basement rocks of southern Patagonia

    International Nuclear Information System (INIS)

    Pankhurst, R.J; Rapela, C.W; Loske, W.P; Fanning, C.M

    2001-01-01

    Southern Patagonia east of the Andes was the site of extensive rhyolite volcanism during the Jurassic rifting of Gondwana and subsequent shallow marine basin formation during the Cretaceous. Thus exposures of pre-Jurassic basement are extremely sparse. Nevertheless, extraction of the maximum amount of information from these scattered outcrops of granite and metamorphic rocks is crucial to assessment of the Palaeozoic and earliest Mesozoic history and crustal structure of the Pacific margin of the supercontinent. In particular, the identification and possible correlation of early terrane accretion on this margin depends on comparison of pre-Jurassic igneous and metamorphic events with adjacent areas. This is a preliminary report on work now in progress to this end (au)

  14. Insectos acuáticos de la Meseta del Somuncura, Patagonia, Argentina. Inventario preliminar

    Directory of Open Access Journals (Sweden)

    Javier MUZÓN

    2005-01-01

    Full Text Available Se brinda un inventario preliminar de los insectos acuáticos de la Meseta del Somuncura y su área de influencia (Patagonia, Argentina realizado sobre la base de colecciones y registros previos de especies pertenecientes a los órdenes Ephemeroptera, Odonata, Hemiptera (Heteroptera, Trichoptera, Diptera (familias Ceratopogonidae, Culicidae y Psychodidae y Coleoptera. Se han relevado diversos tipos de ambientes en 14 localidades. El número de especies registrado asciende a 78, agrupadas en 51 géneros y 26 familias, de las cuales 33 se citan por primera vez del área. De los taxa registrados 83% de los géneros corresponden a grupos de amplia distribución (neotropicales, americanos o cosmopolitas, mientras que 41% de las especies presentan una distribución patagónica o andina.

  15. 210 Pb fluxes in sediment layers sampled from Northern Patagonia lakes

    International Nuclear Information System (INIS)

    Ribeiro Guevara, S.; Sanchez, R.; Arribere, M.; Rizzo, A.

    2003-01-01

    Unsupported 210 Pb fluxes were determined from sediment core inventories in lakes located in Northern Patagonia, Argentina. Total 210 Pb, 226 Ra, associated with supported 210 Pb, and 137 Cs specific activity profiles were measured by gamma-ray spectrometry. Unsupported 210 Pb fluxes showed very low values when compared to other regions, with a 12 fold variation, ranging from 4 to 48 Bq m -2 x y -1 . The linear correlation observed between the 210 Pb fluxes and 137 Cs cumulative fluxes in sediment cores sampled from water bodies within a zone with similar precipitation demonstrated that both radioisotopes behave in the same manner in these systems concerning the processes occurred from fallout to sediment deposition, and that there are no appreciable local or regional sources of unsupported 210 Pb. Positive correlation of 210 Pb fluxes with organic matter contents of the uppermost sediment core layers was also observed. (author)

  16. A new species of Parapsectrocladius Cranston (Diptera: Chironomidae: Orthocladiinae) from Patagonia, Argentina.

    Science.gov (United States)

    Donato, Mariano; Mauad, Melina; Fuentes, María Cecilia

    2015-01-21

    Parapsectrocladius setosus sp. n. is described and figured as pupa and male imago, based on material collected in Patagonia, Argentina. The male of the new species groups with P. escondido Cranston & Añón Suárez by having the anal point tapering triangular; inferior volsella simple, rounded, without any dorsal ridge and apically blunt. It can be distinguished from P. escondido by the possession of strong setae on the inner margin of inferior volsella. New material of Parapsectrocladius belonging from several localities allows us to emend the generic diagnosis of the adult male, female and larva of Parapsectrocladius, discuss its phylogenetic position and to expand the geographic distribution of P. acuminatus Cranston, P. escondido and P. reissi. Cranston. 

  17. Toxocariasis in Carnivora from Argentinean Patagonia: Species molecular identification, hosts, and geographical distribution

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    R.M. Vega

    2018-04-01

    Full Text Available Twenty four specimens of seven species belonging to the families Felidae, Mustelidae, and Canidae were obtained in Lanín and Nahuel Huapi National Parks from March 1996 to April 2016. Specimens were processed by necropsy in order to contribute to the knowledge of toxocariasis in wild carnivores of Argentinean Patagonia. The only Puma concolor and the seven Leopardus geoffroyi were positive for Toxocara cati. Polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP of the ITS-1 region from larval and adult DNA was carried out to confirm parasite species identification. This is the first molecular determination of T. cati from wild felids in Argentina and the study also fill gaps about the spatial distribution and hosts for Toxocara cati. Keywords: Toxocara cati, Puma concolor, Leopardus geoffroyi, Molecular identification, Argentina

  18. Application of DNA forensic techniques for identifying poached guanacos (Lama guanicoe) in Chilean Patagonia*.

    Science.gov (United States)

    Marín, Juan C; Saucedo, Cristian E; Corti, Paulo; González, Benito A

    2009-09-01

    Guanaco (Lama guanicoe) is a protected and widely distributed ungulate in South America. A poacher, after killing guanacos in Valle Chacabuco, Chilean Patagonia, transported and stored the meat. Samples were retrieved by local police but the suspect argued that the meat was from a horse. Mitochondrial cytochrome b gene (774 pb), 15 loci microsatellites, and SRY gene were used to identify the species, number of animals and their population origin, and the sex of the animals, respectively. Analysis revealed that the samples came from a female (absence of SRY gene) Patagonian guanaco (assignment probability between 0.0075 and 0.0282), and clearly distinguishing it from sympatric ungulates (E-value = 0). Based on the evidence obtained in the field in addition to forensic data, the suspect was convicted of poaching and illegally carrying fire arms. This is the first report of molecular tools being used in forensic investigations of Chilean wildlife indicating its promising future application in guanaco management and conservation.

  19. Cystobasidiomycetes yeasts from Patagonia (Argentina): description of Rhodotorula meli sp. nov. from glacial meltwater.

    Science.gov (United States)

    Libkind, Diego; Sampaio, José Paulo; van Broock, Maria

    2010-09-01

    A basidiomycetous yeast, strain CRUB 1032(T), which formed salmon-pink colonies, was isolated from glacial meltwater in Patagonia, Argentina. Morphological, physiological and biochemical characterization indicated that this strain belonged to the genus Rhodotorula. Molecular taxonomic analysis based on the 26S rDNA D1/D2 domain and internal transcribed spacer region sequences showed that strain CRUB 1032(T) represents an undescribed yeast species, for which the name Rhodotorula meli sp. nov. is proposed (type strain is CRUB 1032(T)=CBS 10797(T)=JCM 15319(T)). Phylogenetic analysis showed that Rhodotorula lamellibrachii was the closest known species, which, together with R. meli, formed a separate cluster related to the Sakaguchia clade within the Cystobasidiomycetes. Additional Patagonian yeast isolates of the class Cystobasidiomycetes are also investigated in the present work.

  20. Alien invasions and the game of hide and seek in Patagonia.

    Directory of Open Access Journals (Sweden)

    Martin Lindegren

    Full Text Available The introduction, establishment and spread of alien species is a major threat to biodiversity and the provision of ecosystem services for human wellbeing. In order to reduce further loss of biodiversity and maintain productive and sustainable ecosystems, understanding the ecological mechanisms underlying species invasions and avoiding potentially harmful effects on native communities is urgently needed, but largely lacking. We here demonstrate, by means of hydroacoustics and advanced spatial modelling, how native fish species as a result of previous exposure to native predators may successfully respond to invasive novel predators through a complicated game of hide and seek, minimizing spatio-temporal overlap with predators, and potentially facilitating coexistence between native prey species (Galaxiids and introduced novel predators (Salmonids in a deep Andean lake, Patagonia.

  1. Marine pollution effects on the southern surf crab Ovalipes trimaculatus (Crustacea: Brachyura: Polybiidae) in Patagonia Argentina.

    Science.gov (United States)

    Lezcano, Aníbal Hernán; Rojas Quiroga, María Laura; Liberoff, Ana Laura; Van der Molen, Silvina

    2015-02-28

    We compared the carapace shape and thickness as well as the energy density of Ovalipes trimaculatus inhabiting areas comprising a gradient of marine pollution: high, moderate and undetected, in the Nuevo gulf (Patagonia Argentina). The carapace shape was evaluated by means of individual asymmetry scores (=fluctuating asymmetry) whereas the carapace thickness was assessed by measuring the carapace dry weight. The energy density was analyzed through its negative relationship with water content in muscle tissue. The individual asymmetry scores as well as the percentage of water content in muscle tissue were proportional to the marine pollution gradient, whereas the carapaces thickness did not differ among sampling sites. Our results are consistent with previous findings and demonstrate the direct effect of marine pollution on other taxa different from gastropods, cephalopods and polyplacophora and add to long-standing concerns about detrimental effects caused by marine pollution on the benthic community of the Nuevo gulf. Copyright © 2014 Elsevier Ltd. All rights reserved.

  2. Ethical and Civic Education. Difficulties during the Curricular Reform in Argentine Patagonia

    Directory of Open Access Journals (Sweden)

    Isabelino Siede

    2015-04-01

    Full Text Available DOI: http://dx.doi.org/10.17227/01234870.41folios51.68 What type of ethical and civic education is effectively provided at school? This article analyzes the curricular prescriptions of Ethical and Citizenship Education in primary schools of the Argentine Patagonia, as well as its relations and contradictions with the school practices of moral education It inquires the process of definition of the area in the context of the Educational Reform in the 90s. Also, it pursuits to remake the way it was incorporated in the provincial curriculum design. Throughout focus groups and interviews to teachers from different public and private schools of three towns from de north of Santa Cruz, we analyze the descriptions and expectative of the teachers about their teaching practice in the moral area, as well as the possible causes of the differences and the contradictions between the policies of the curricular statement and educational proposals offered at school.

  3. Estado del conocimiento taxonómico de la fauna de Chironomidae (Diptera: Nematocera de la Patagonia Current state of the taxonomic knowledge of the Chironomidae fauna (Diptera: Nematocera from Patagonia

    Directory of Open Access Journals (Sweden)

    Mariano Donato

    2009-06-01

    Full Text Available La familia Chironomidae (Diptera: Nematocera es uno de los grupos de insectos más ampliamente distribuidos y abundantes en cuerpos de agua dulce. Los representantes de esta familia pueden explotar áreas con amplios gradientes ambientales. La información que se presenta está basada en la recopilación de datos distribucionales bibliográficos, del estudio del material tipo de las especies de Chironomidae depositadas en el Natural History Museum (UK y del material de colección del Museo de La Plata (Argentina. En la Patagonia, se registran 9 subfamilias, la subfamilia monotípica Chilenomyiinae es endémica de esta área. Dentro de estas subfamilias, 53 de los 111 géneros conocidos para América del Sur están presentes en la Patagonia. Del total de géneros de la Patagonia, el 20 % es endémico y 7 de ellos muestran relaciones transantárticas. En la Patagonia, se registran 177 especies de Chironomidae, el 98% de éstas son endémicas, el 3 % son consideradas nomina dubia y el 17% requiere revisión ya que su ubicación sistemática es dudosa. Las descripciones originales de las especies patagónicas de Chironomidae están basadas principalmente sobre machos (n=58 y machos y hembras (n=43, ambas representan el 57% del total; el resto de las especies han sido descriptas con diferentes combinaciones de estadios del ciclo de desarrollo.The Chironomidae (Diptera: Nematocera family is one of the most widely distributed group of insects and often the most abundant in freshwater environments. Representatives of this family can exploit a wide range of environmental gradients. The information here presented is based on the compilation of distributional data obtained from bibliography, the study of the type material deposited in the Natural History Museum (UK and the collection material from Museo de La Plata (Argentina. Nine subfamilies are recorded from Patagonia, being the monotypic subfamily Chilenomyiinae endemic for the area. From the 111 known

  4. Assessing Argentina's response to H1N1 in austral winter 2009: from presidential lethargy to local ingenuity.

    Science.gov (United States)

    Stern, Alexandra Minna; Koreck, Maria Teresa; Markel, Howard

    2011-01-01

    Argentina experienced a heavy burden of novel H1N1 influenza in austral winter 2009. In early July 2009, Argentina reported more than 1,500 cases and was confronting the highest per capita H1N1 mortality rate in the world. By September 2009, more than 500 people had died of H1N1 in Argentina. Unlike sister countries Chile and Mexico, Argentina's national authorities did not respond by implementing mitigation measures such as public gathering bans and school closures or by issuing broad-based messages about personal hygiene and disease prevention. Around the globe, many observers expressed dismay at this inaction. For example, The Economist scolded the country's leadership for its halting response and seeming apathy to an escalating health crisis. Why did Argentina, a middle-income country with a developed and, in many respects, sophisticated system of health and education, fall short in enacting a national pandemic plan during the 2009 H1N1 outbreak? What can we learn from Argentina's experiences about obstacles and opportunities during a pandemic crisis? This article, based on extensive qualitative research, including document capture, media analysis, and oral history interviews, assesses Argentina's mixed response to H1N1 during austral winter 2009, and adds to a growing body of studies focused on how governments and health systems in the Americas performed during the 2009-2010 H1N1 pandemic. When the first cases of novel H1N1 influenza were identified by the U.S. Centers for Disease Control and Prevention (CDC) in mid-April 2009, Argentina's national health ministry appeared to be prepared. Starting in 2002, primarily in response to the prospect of avian influenza, the health ministry had formulated a preparedness plan and, beginning in 2005, had conducted at least five pandemic simulation exercises. In April 2009, Argentina's health ministry activated its pandemic response plan, triggering the establishment of an executive-level situation room equipped with

  5. [Outbreak of histoplasmosis in province of Neuquén, Patagonia Argentina].

    Science.gov (United States)

    Calanni, Liliana María; Pérez, Rufina Ana; Brasili, Susana; Schmidt, Norma Graciela; Iovannitti, Cristina Adela; Zuiani, María Fernanda; Negroni, Ricardo; Finquelievich, Jorge; Canteros, Cristina Elena

    2013-01-01

    In Argentina, there are no reports of autochthonous cases of histoplasmosis in the southern regions of the country. To report a histoplasmosis outbreak in Zapala town, Province of Neuquén, Patagonia Argentina. We evaluated the clinical and epidemiological characteristics of 5 patients involved in the outbreak. Environmental studies were conducted to determine the source of infection. The genetic profile of Histoplasma capsulatum strains isolated from the index case (IC) were compared with clinical isolates from Argentinean patients not related to the outbreak, using RAPD-PCR with primers 1281-1283. The patients were residents of Zapala, and had not visited other geographical areas before. All patients had an influenza-like syndrome, and X-ray revealed disseminated micronodular images throughout the lung parenchyma. The IC needed specific antifungal therapy; the remaining 4 patients had mild symptoms, and did not require therapy. All of them had a good clinical outcome. Strains of H. capsulatum isolated from blood culture and lung biopsy of the IC showed a genetic profile different from other strains analyzed. The presence of the fungus in the environment was demonstrated by the detection of anti-Histoplasma antibodies in BALB/c mice inoculated with soil obtained in a culvert where workers had dug up earth after a landslide. This outbreak suggests the histoplasmosis endemic area is under the 38° S parallel. Patients from Neuquén, Patagonia Argentina, with compatible symptoms of histoplasmosis should be tested, regardless of their travel or exposure history. Copyright © 2012 Revista Iberoamericana de Micología. Published by Elsevier Espana. All rights reserved.

  6. Capacity building for freshwater insect studies in northern Patagonia, Argentina: DARWIN Initiative programme

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    Stephen J. BROOKS

    2009-01-01

    Full Text Available Este proyecto fue financiado durante un período de tres años, desde septiembre de 2006 a través de la Iniciativa Darwin del gobierno Británico. El objetivo de este trabajo es el estudio de los insectos acuáticos del Parque Nacional Nahuel Huapi (PNNHP, Patagonia, Argentina. El parque incluye una gran variedad de hábitats que comprenden arroyos, ríos y lagos los cuales se distribuyen desde el bosque siempreverde frío, hasta la zona árida de estepa. Todo el material será identificado y depositado en las colecciones del Museo La Plata y el Museo de Historia Natural de Londres. Los fondos de la Iniciativa Darwin han sido utilizados para equipar un laboratorio de biodiversidad en las oficinas del PNNHP en Bariloche y la estación de investigación en Puerto Blest. Toda la información de los insectos acuáticos y las distintas formaciones vegetales donde éstos se han encontrado, se incluirá en una base de datos (la primera de su tipo en Patagonia que utilizará la metodología GIS para analizar patrones de distribución de las especies en el parque. En estos momentos se están produciendo varias guías de campo para identificar los insectos acuáticos del PNNHP. Es nuestro deseo que los resultados obtenidos en este proyecto, contribuyan a la conservación de los sistemas acuáticos en Argentina y América del Sur

  7. Respiratory function in voluntary participating Patagonia sea lions in sternal recumbency

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    Andreas Fahlman

    2016-11-01

    Full Text Available We measured esophageal pressures (n=4, respiratory flow rates (n=5, and expired O2 and CO2 (n=4 in five adult Patagonia sea lions (Otaria flavescens, body mass range 94.3-286.0 kg during voluntary breaths while laying down. The data were used to estimate the dynamic specific lung compliance (sCL, cmH2O-1, the O2 consumption rate (VO2 and CO2 production rates (VCO2 during rest. Our results indicate that the resting tidal volume in Patagonia sea lions is approximately 47-73% of the estimated total lung capacity. The esophageal pressures indicated that expiration is passive during voluntary breaths. The average sCL of dolphins was 0.41±0.11 cmH2O−1, which is similar to those measured in anesthetized sea lions and awake cetaceans, and significantly higher as compared with humans (0.08 cmH2O−1. The average estimated and using breath-by-breath respirometry were 1.023 ± 0.327 L O2 min-1 (range: 0.695-1.514 L O2 min−1 and 0.777 ± 0.318 L CO2 min-1, (range: 0.510-1.235 L CO2 min-1, respectively, which is similar to previously published metabolic measurements from California and Steller sea lions using conventional flow-through respirometry. Our data provide end-tidal gas composition and provide novel data for respiratory physiology in pinnpeds, which may be important for clinical medicine and conservation efforts.

  8. Cultural Transmission of Traditional Knowledge in two populations of North-western Patagonia

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    Lozada Mariana

    2008-12-01

    Full Text Available Abstract Background In the present study we have investigated the cultural transmission of two types of traditional plant knowledge in two communities of North-western Patagonia, Argentina. In the Pilcaniyeu community, we studied the transmission of traditional knowledge related to horticultural practices in home-gardens, greenhouses and gardens; while in the community of Cuyin Manzano, we studied wild plant gathering customs. Methods Ethnobotanical fieldwork was conducted by means of semi-structured interviews, in which we investigated which plants are used, at what life history phase was learned, modes of transmission and who the principal transmitters were in childhood and adulthood. In both communities, each of this three aspects related to cultural transmission were categorized and the frequencies of each category were obtained. The total number of species recorded in each community was also calculated. Frequencies were analyzed with the Chi-square test of independence. Results and discussion In both communities, transmission of traditional plant knowledge begins at an early age, as a family custom, in which women play a predominant role. Wild plant use and horticultural knowledge continue to be learned during adulthood. This was particularly registered associated with horticultural learning, which receives greater influence from extension agents who are introducing new practices and technology. This outside influence, which implies novelty, could imply syncretism but also traditional knowledge loss. Conclusion Given the remarkable acculturation processes occurring at present in rural communities of Northwestern Patagonia, it might be of vital importance to document traditional knowledge of ancient practices. Moreover, it could be interesting to share our results with both populations in order to encourage participatory activities within the communities which could enhance traditional knowledge horizontal transmission, particularly among

  9. El proceso de escolarización en la provincia de Almería (1850-1900

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    Pilar BALLARÍN DOMINGO

    2010-03-01

    Full Text Available RESUMEN: Queremos, en este trabajo, presentar un aspecto histórico que aporte nuevos elementos de análisis a las causas del persistente subdesarrollo de la provincia de Almería.

  10. Temperature profile data collected using XBTs from the AUSTRAL RAINBOW from the Pacific Ocean during the Thermal Structure Monitoring Program in the Pacific (TRANSPAC) project, 1976-10-20 to 1976-10-23 (NODC Accession 8100228)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Temperature profile data were collected using bathythermograph (BT/XBT) casts from AUSTRAL RAINBOW in the Pacific Ocean from October 20, 1976 to October 23, 1976....

  11. Aplicación web sobre los diversos perfiles de mercado en las provincias de Canadá

    OpenAIRE

    Caicedo Castro, Paula Andrea; Argumedo, Juliana

    2014-01-01

    El proyecto de creación de una Aplicación web sobre los diferentes perfiles de mercado de las provincias canadienses, consiste en la recopilación de información de diversas fuentes académicas, con el fin de crear una guía electrónica que permita a los exportadores colombianos tener información precisa y actualizada sobre cada una de las provincias canadienses.

  12. Nuevas citas en Elaeocarpaceae, Escalloniaceae, Orchidaceae, Polypodiaceae y Pteridaceae para la flora de la provincia de Jujuy (Argentina

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    Claudia M. Martín

    2015-07-01

    Full Text Available En el marco de un estudio de flora y vegetación realizado en la Provincia Fitogeográfica de las Yungas, se citan e ilustran siete especies que no habían sido registradas para la provincia de Jujuy (Argentina: Vallea stipularis (Elaeocarpaceae, Escallonia schreiteri (Escalloniaceae, Cyclopogon congestus, Rhinocidium fuchsii, Sacoila secundiflora (Orchidaceae, Campyloneurum angustipaleatum (Polypodiaceae y Adiantum camptorachis (Pteridaceae.

  13. From mammals back to birds: Host-switch of the acanthocephalan Corynosoma australe from pinnipeds to the Magellanic penguin Spheniscus magellanicus.

    Science.gov (United States)

    Hernández-Orts, Jesús Servando; Brandão, Martha; Georgieva, Simona; Raga, Juan Antonio; Crespo, Enrique Alberto; Luque, José Luis; Aznar, Francisco Javier

    2017-01-01

    Trophically-transmitted parasites are regularly exposed to potential new hosts through food web interactions. Successful colonization, or switching, to novel hosts, occur readily when 'donor' and 'target' hosts are phylogenetically related, whereas switching between distantly related hosts is rare and may result from stochastic factors (i.e. rare favourable mutations). This study investigates a host-switching event between a marine acanthocephalan specific to pinnipeds that is apparently able to reproduce in Magellanic penguins Spheniscus magellanicus from Brazil. Detailed analysis of morphological and morphometrical data from acanthocephalans from penguins indicates that they belong to Corynosoma australe Johnston, 1937. Partial fragments of the 28S rRNA and mitochondrial cox1 genes were amplified from isolates from penguins and two pinniped species (i.e. South American sea lion Otaria flavescens and South American fur seal Arctocephalus australis) to confirm this identification. Infection parameters clearly differ between penguins and the two pinniped species, which were significantly lower in S. magellanicus. The sex ratio of C. australe also differed between penguins and pinnipeds; in S. magellanicus was strongly biased against males, while in pinnipeds it was close to 1:1. Females of C. australe from O. flavescens were smaller than those from S. magellanicus and A. australis. However, fecundity (i.e. the proportion of fully developed eggs) was lower and more variable in females collected from S. magellanicus. At first glance, the occurrence of reproductive individuals of C. australe in Magellanic penguins could be interpreted as an adaptive colonization of a novel avian host through favourable mutations. However, it could also be considered, perhaps more likely, as an example of ecological fitting through the use of a plesimorphic (host) resource, since the ancestors of Corynosoma infected aquatic birds.

  14. From mammals back to birds: Host-switch of the acanthocephalan Corynosoma australe from pinnipeds to the Magellanic penguin Spheniscus magellanicus.

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    Jesús Servando Hernández-Orts

    Full Text Available Trophically-transmitted parasites are regularly exposed to potential new hosts through food web interactions. Successful colonization, or switching, to novel hosts, occur readily when 'donor' and 'target' hosts are phylogenetically related, whereas switching between distantly related hosts is rare and may result from stochastic factors (i.e. rare favourable mutations. This study investigates a host-switching event between a marine acanthocephalan specific to pinnipeds that is apparently able to reproduce in Magellanic penguins Spheniscus magellanicus from Brazil. Detailed analysis of morphological and morphometrical data from acanthocephalans from penguins indicates that they belong to Corynosoma australe Johnston, 1937. Partial fragments of the 28S rRNA and mitochondrial cox1 genes were amplified from isolates from penguins and two pinniped species (i.e. South American sea lion Otaria flavescens and South American fur seal Arctocephalus australis to confirm this identification. Infection parameters clearly differ between penguins and the two pinniped species, which were significantly lower in S. magellanicus. The sex ratio of C. australe also differed between penguins and pinnipeds; in S. magellanicus was strongly biased against males, while in pinnipeds it was close to 1:1. Females of C. australe from O. flavescens were smaller than those from S. magellanicus and A. australis. However, fecundity (i.e. the proportion of fully developed eggs was lower and more variable in females collected from S. magellanicus. At first glance, the occurrence of reproductive individuals of C. australe in Magellanic penguins could be interpreted as an adaptive colonization of a novel avian host through favourable mutations. However, it could also be considered, perhaps more likely, as an example of ecological fitting through the use of a plesimorphic (host resource, since the ancestors of Corynosoma infected aquatic birds.

  15. Genomic insights into the origin and diversification of late maritime hunter-gatherers from the Chilean Patagonia.

    Science.gov (United States)

    de la Fuente, Constanza; Ávila-Arcos, María C; Galimany, Jacqueline; Carpenter, Meredith L; Homburger, Julian R; Blanco, Alejandro; Contreras, Paloma; Cruz Dávalos, Diana; Reyes, Omar; San Roman, Manuel; Moreno-Estrada, Andrés; Campos, Paula F; Eng, Celeste; Huntsman, Scott; Burchard, Esteban G; Malaspinas, Anna-Sapfo; Bustamante, Carlos D; Willerslev, Eske; Llop, Elena; Verdugo, Ricardo A; Moraga, Mauricio

    2018-04-24

    Patagonia was the last region of the Americas reached by humans who entered the continent from Siberia ∼15,000-20,000 y ago. Despite recent genomic approaches to reconstruct the continental evolutionary history, regional characterization of ancient and modern genomes remains understudied. Exploring the genomic diversity within Patagonia is not just a valuable strategy to gain a better understanding of the history and diversification of human populations in the southernmost tip of the Americas, but it would also improve the representation of Native American diversity in global databases of human variation. Here, we present genome data from four modern populations from Central Southern Chile and Patagonia ( n = 61) and four ancient maritime individuals from Patagonia (∼1,000 y old). Both the modern and ancient individuals studied in this work have a greater genetic affinity with other modern Native Americans than to any non-American population, showing within South America a clear structure between major geographical regions. Native Patagonian Kawéskar and Yámana showed the highest genetic affinity with the ancient individuals, indicating genetic continuity in the region during the past 1,000 y before present, together with an important agreement between the ethnic affiliation and historical distribution of both groups. Lastly, the ancient maritime individuals were genetically equidistant to a ∼200-y-old terrestrial hunter-gatherer from Tierra del Fuego, which supports a model with an initial separation of a common ancestral group to both maritime populations from a terrestrial population, with a later diversification of the maritime groups.

  16. Estado del conocimiento taxonómico de la fauna de Chironomidae (Diptera: Nematocera de la Patagonia

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    Mariano DONATO

    2009-01-01

    Full Text Available La familia Chironomidae (Diptera: Nematocera es uno de los grupos de insectos más ampliamente distribuidos y abundantes en cuerpos de agua dulce. Los representantes de esta familia pueden explotar áreas con amplios gradientes ambientales. La información que se presenta está basada en la recopilación de datos distribucionales bibliográficos, del estudio del material tipo de las especies de Chironomidae depositadas en el Natural History Museum (UK y del material de colección del Museo de La Plata (Argentina. En la Patagonia, se registran 9 subfamilias, la subfamilia monotípica Chilenomyiinae es endémica de esta área. Dentro de estas subfamilias, 53 de los 111 géneros conocidos para América del Sur están presentes en la Patagonia. Del total de géneros de la Patagonia, el 20 % es endémico y 7 de ellos muestran relaciones transantárticas. En la Patagonia, se registran 177 especies de Chironomidae, el 98% de éstas son endémicas, el 3 % son consideradas nomina dubia y el 17% requiere revisión ya que su ubicación sistemática es dudosa. Las descripciones originales de las especies patagónicas de Chironomidae están basadas principalmente sobre machos (n=58 y machos y hembras (n=43, ambas representan el 57% del total; el resto de las especies han sido descriptas con diferentes combinaciones de estadios del ciclo de desarrollo.

  17. Sexual dimorphism in the mandible of the armadillo Chaetophractus villosus (Desmarest, 1804) (Dasypodidae) from northern Patagonia, Argentina

    OpenAIRE

    Squarcia, SM.; Sidorkewicj, NS.; Camina, R.; Casanave, EB.

    2009-01-01

    The aim of this study was to study the sexual dimorphism in adult Chaetophractus villosus (Desmarest, 1804), from northern Patagonia, Argentina. Eight mandibular traits were measured in 37 males and 34 females. Univariate and multivariate morphometric analysis were applied to the data set. Results showed that C. villosus was sexually dimorphic, with higher absolute values corresponding to females. The total length of the mandible was the most important variable to discriminate sexes, followed...

  18. Causes and Model Skill of the Persistent Intense Rainfall and Flooding in Paraguay during the Austral Summer 2015-2016

    Science.gov (United States)

    Doss-Gollin, J.; Munoz, A. G.; Pastén, M.

    2017-12-01

    During the austral summer 2015-16 severe flooding displaced over 150,000 people on the Paraguay River system in Paraguay, Argentina, and Southern Brazil. This flooding was out of phase with the typical seasonal cycle of the Paraguay River, and was driven by repeated intense rainfall events in the Lower Paraguay River basin. Using a weather typing approach within a diagnostic framework, we show that enhanced moisture inflow from the low-level jet and local convergence associated with baroclinic systems favored the development of mesoscale convective activity and enhanced precipitation. The observed circulation patterns were made more likely by the cross-timescale interactions of multiple climate mechanisms including the strong, mature El Niño event and an active Madden-Julien Oscillation in phases four and five. We also perform a comparison of the rainfall predictability using seasonal forecasts from the Latin American Observatory of Climate Events (OLE2) and sub-seasonal forecasts produced by the ECMWF. We find that the model output precipitation field exhibited limited skill at lead times beyond the synoptic timescale, but that a Model Output Statistics (MOS) approach, in which the leading principal components of the observed rainfall field are regressed on the leading principal components of model-simulated rainfall fields, substantially improves spatial representation of rainfall forecasts. Possible implications for flood preparedness are briefly discussed.

  19. La pesca artesanal en el sur austral de Chile. Controversias territoriales en el espacio marino – costero

    Directory of Open Access Journals (Sweden)

    Gonzalo Saavedra

    2016-06-01

    Full Text Available El artículo analiza desde una perspectiva etnográfica tres casos en donde se evidencia que la dimensión territorial de la pesca artesanal, en el sur-austral de Chile, es problemática y compleja. Problemática porque revela que el uso/apropiación del espacio en cuestión es diverso y desigual según los actores que en él se sitúan. En tal escenario son las comunidades de pesca artesanal las que mayoritariamente padecen las consecuencias perversas de esta desigualdad, encontrando un lugar cada vez más incierto y vulnerable como forma de vida cultural. En contrapartida es un escenario atractivo para empresas e inversionistas privados, quienes se ven notoriamente favorecidos por los marcos regulatorios y legislativos impulsados desde la administración estatal. Es un escenario de complejidad porque se trata de territorios y sistemas económico-sociales abiertos, dinámicos y cambiantes, condición multidimensional que nos impele a pensar y problematizar el espacio pesquero artesanal más allá de sus emplazamientos convencionales (la caleta, la comuna o la región. El análisis que aquí se plantea explora las tensiones aparentemente internas que derivan del entramado relacional referido, las que sin embargo desbordan los límites de cada localización.

  20. Spatial distribution of Salpa thompsoni in the high Antarctic area off Adélie Land, East Antarctica during the austral summer 2008

    Science.gov (United States)

    Ono, Atsushi; Moteki, Masato

    2017-06-01

    The salp Salpa thompsoni has the potential to alter the Southern Ocean ecosystem through competition with krill Euphausia superba. Information on the reproductive status of S. thompsoni in the high Southern Ocean is thus essential to understanding salp population growth and predicting changes in the Southern Ocean ecosystem. We carried out stratified and quantitative sampling from the surface to a depth of 2000 m during the austral summer of 2008 to determine the spatial distribution and population structure of S. thompsoni in the Southern Ocean off Adélie Land. We found two salp species, S. thompsoni and Ihlea racovitzai, with the former being dominant. S. thompsoni was distributed north of the continental slope area, while I. racovitzai was observed in the neritic zone. Mature aggregates and solitary specimens of S. thompsoni were found south of the Southern Boundary of the Antarctic Circumpolar Current, suggesting that S. thompsoni is able to complete its life cycle in high Antarctic waters during the austral summer. However, S. thompsoni was sparsely distributed in the continental slope area, and absent south of the Antarctic Slope Front, suggesting that it is less competitive with krill for food in the slope area off Adélie Land, where krill is densely distributed during the austral summer.

  1. The Usefulness of Edible and Medicinal Fabaceae in Argentine and Chilean Patagonia: Environmental Availability and Other Sources of Supply

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    Soledad Molares

    2012-01-01

    Full Text Available Fabaceae is of great ethnobotanical importance in indigenous and urban communities throughout the world. This work presents a revision of the use of Fabaceae as a food and/or medicinal resource in Argentine-Chilean Patagonia. It is based on a bibliographical analysis of 27 ethnobotanical sources and catalogues of regional flora. Approximately 234 wild species grow in Patagonia, mainly (60% in arid environments, whilst the remainder belong to Sub-Antarctic forest. It was found that 12.8% (30 species, mainly woody, conspicuous plants, are collected for food or medicines. Most of the species used grow in arid environments. Cultivation and purchase/barter enrich the Fabaceae offer, bringing it up to a total of 63 species. The richness of native and exotic species, and the existence of multiple strategies for obtaining these plants, indicates hybridization of knowledge and practices. Only 22% of the total species used are mentioned in bothcontexts of food and medicine, reflecting low-use complementation. This study suggests a significant ecological appearance and a high level of availability in shops and exchange networks in Patagonia, highlighting the need to consider the full set of environmental and socioeconomic factors in research related to the use and cultural importance of plants in regional contexts.

  2. The Usefulness of Edible and Medicinal Fabaceae in Argentine and Chilean Patagonia: Environmental Availability and Other Sources of Supply

    Science.gov (United States)

    Molares, Soledad; Ladio, Ana

    2012-01-01

    Fabaceae is of great ethnobotanical importance in indigenous and urban communities throughout the world. This work presents a revision of the use of Fabaceae as a food and/or medicinal resource in Argentine-Chilean Patagonia. It is based on a bibliographical analysis of 27 ethnobotanical sources and catalogues of regional flora. Approximately 234 wild species grow in Patagonia, mainly (60%) in arid environments, whilst the remainder belong to Sub-Antarctic forest. It was found that 12.8% (30 species), mainly woody, conspicuous plants, are collected for food or medicines. Most of the species used grow in arid environments. Cultivation and purchase/barter enrich the Fabaceae offer, bringing it up to a total of 63 species. The richness of native and exotic species, and the existence of multiple strategies for obtaining these plants, indicates hybridization of knowledge and practices. Only 22% of the total species used are mentioned in bothcontexts of food and medicine, reflecting low-use complementation. This study suggests a significant ecological appearance and a high level of availability in shops and exchange networks in Patagonia, highlighting the need to consider the full set of environmental and socioeconomic factors in research related to the use and cultural importance of plants in regional contexts. PMID:22194774

  3. First paleoparasitological study of micromammal coprolites from the holocene of the Somuncurá Plateau Protected Natural Area (Patagonia Argentina).

    Science.gov (United States)

    Beltrame, María Ornela; Bellusci, Agustín; Andrade, Analía

    2018-02-27

    The Somuncurá Plateau is a Protected Natural Area located in the middle of the northern extra-Andean arid Patagonia. Inhabited by at least 20 small mammal species, is the place with the uppermost species richness in Patagonia. The aim of this study was to examine the parasite remains from micromammal coprolites collected in association with a bone sequence recovered at the east of the Somuncurá Plateau (site "Alero Las Lechuzas"). Coprolites came from the four temporal units previously defined: unit I (4790 ± 100 yrs. 14 C B.P.), unit II, unit III (7840 ± 120 yrs. 14 C B.P.) and unit IV. Each coprolite was processed, rehydrated, homogenized, processed by spontaneous sedimentation and examined using a light microscope. Coprolites and eggs were described, measured and photographed. Samples were positive for two nematode species: Helminthoxys caudatus Freitas, Lent & Almeida, 1937 (Oxyurida, Oxyuridae) and Trichuris spp. (Trichinellida: Trichuridae). This is the first paleoparasitological study developed for the Somuncurá Plateau Protected Area. Moreover, this is the first time that the genus Helminthoxys is reported from ancient times worldwide. Coprolites were attributed to the mountain cavy Microcavia australis (Rodentia, Caviidae).The presence of H. caudatus for the Middle Holocene of northern Patagonia contributes to the study of the history of the histricomorphs and pinworms relationships. Copyright © 2018 Elsevier B.V. All rights reserved.

  4. Do native grazers from Patagonia, Argentina, consume the invasive kelp Undaria pinnatifida? ¿Pueden los pastoreadores nativos de Patagonia, Argentina, consumir al alga invasora Undaria pinnatifida?

    Directory of Open Access Journals (Sweden)

    S. Valeria Teso

    2009-06-01

    Full Text Available The invasive kelp Undaria pinnatifida (Phaeophyceae, Laminariales was first reported in Golfo Nuevo in 1992 and since then it has spread widely over more than 170 km, all along the northern Patagonian coast, Argentina. Field observations in the region have indicated the potential role of invertebrate grazers, like the sea urchins Arbacia dufresnii and Pseudechinus magellanicus and the gastropod Tegula patagonica, in controlling algal density. Laboratory experiments were conducted to ascertain whether, and if so, to what extent these grazers actually feed on the algae. The studied sea urchins fed on the alga, whereas the snail scraped off biofouling adhered to its surface. Higher densities of grazers were observed on the kelp during summer and might be attributed to increasing in metabolism with increasing temperature, and degradation of blades and sporophylls, which possibly increase their palatability.El alga invasora Undaria pinnatifida (Phaeophyceae, Laminariales fue reportada por primera vez en Golfo Nuevo en 1992, dispersándose ampliamente a lo largo de 170 km de costa en el norte de la Patagonia, Argentina. Observaciones de campo hechas en los erizos de mar Arbacia dufresnii y Pseudechinus magellanicus y en el gasterópodo Tegula patagonica evidenciaron que son posibles consumidores de Undaria pinnatifida en la población local. Se realizaron experimentos de laboratorio con el objetivo de probar si estos pastoreadores eran capaces de consumir el alga. Los erizos de mar estudiados consumen el alga, mientras que el gasterópodo ramonea los epibiontes presentes sobre su superficie. Altas densidades de ramoneadores fueron encontradas sobre el alga durante el verano y podrían ser atribuidas a un aumento del su metabolismo con el aumento de la temperatura y a la degradación de las láminas y esporofilos, lo cual posiblemente aumente la palatabilidad del alga.

  5. EL NUEVO MODELO INDUSTRIAL EN EL SECTOR TEXTIL DE LA PROVINCIA DE ALICANTE (1970-1991

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    Rafael Sebastiá Alcaraz

    1999-01-01

    Full Text Available Los espacios industriales vertebrados alrededor de la industria textil en la provincia de Alicante, han atravesado una profunda crisis desde 1970 hasta 1991. Las dificultades mostradas para adaptarse a las innovaciones, a la apertura de los mercados y al incremen- to de la competencia de países que disponen de abundante materia prima o de mano de obra más barata han modificado sus características geográficas.

  6. Stenocercus doellojuradoi (Iguanidae, Tropidurinae): una nueva especie para la provincia de San Juan, Argentina

    OpenAIRE

    Laspiur, Alejandro; Acosta, Juan Carlos

    2006-01-01

    República Argentina, Provincia de San Juan, Depto. Valle Fértil, 3 km al norte de la localidad de Las Tumanas sobre la Ruta Provincial 510 (30°52’ S, 67°20’ W). COLECTOR: Alejandro Laspiur. FECHA: 25 /02/ 2006. MATERIAL DE REFERENCIA: Instituto y Museo de Ciencias Naturales, Universidad Nacional de San Juan: IMCNUNSJ 3000. Un ejemplar macho (LHC: 54 mm.).

  7. Stenocercus doellojuradoi (Iguanidae, Tropidurinae: una nueva especie para la provincia de San Juan, Argentina

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    Laspiur, Alejandro

    2006-05-01

    Full Text Available República Argentina, Provincia de San Juan, Depto. Valle Fértil, 3 km al norte de la localidad de Las Tumanas sobre la Ruta Provincial 510 (30°52’ S, 67°20’ W. COLECTOR: Alejandro Laspiur. FECHA: 25 /02/ 2006. MATERIAL DE REFERENCIA: Instituto y Museo de Ciencias Naturales, Universidad Nacional de San Juan: IMCNUNSJ 3000. Un ejemplar macho (LHC: 54 mm..

  8. Tratta internazionale e sfruttamento lavorativo della comunità punjabi in provincia di Latina

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    Marco Omizzolo

    2016-03-01

    Full Text Available L'articolo analizza, a partire dai sistemi di tratta internazionale a scopo di sfruttamento lavorativo e caporalato, il caso, originale quanto complesso, della comunità punjabi della provincia di Latina. Uomini e sempre più spesso anche donne costrette a vivere condizioni prossime alla riduzione in schiavitù per via di una consorteria criminale punjabi-pontina composta da trafficanti indiani, caporali, alcuni proprietari di aziende agricole pontine e liberi professionisti.

  9. PROVINCIA DEL TEQUENDAMA - CUNDINAMARCA: PROSPECTIVA DE LA CADENA PRODUCTIVA DE MANGO

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    Juan Pablo Tribín Rivera

    2014-01-01

    Full Text Available El propósito del artículo de investigación es exponer el análisis prospectivo de la cadena productiva de mango en la Provincia del Tequendama - Cundinamarca por medio de la metodología de dinámica de sistemas, analizando los antecedentes, el presente y un futuro probable de esta cadena, con el fin de dar a conocer los resultados de la investigación “Mercado Prospectivo del Mango: Comparativo entre el mercado interno y el mercado externo para la Provincia del Tequendama - Cundinamarca”. Las experiencias adquiridas por medio de las visitas de campo, información primaria y secundaria, así como el proceso de modelación y simulación mediante la técnica dinámica de sistemas, permitió desarrollar el escenario prospectivo con mayor potencial para los productores de la Provincia y en consecuencia exponer las opiniones del autor con respecto a lo que deben hacer los participantes para mejorar sus condiciones de ingreso.

  10. Expansión geográfica del síndrome pulmonar por hantavirus en la Argentina: Informe del caso más austral Geographic expansion of hantavirus pulmonary syndrome in Argentina: The southernest case report

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    Carla Bellomo

    2009-12-01

    Full Text Available Desde 1995 se han informado más de 1000 casos de síndrome pulmonar por hantavirus (SPH en la Argentina, enfermedad grave y muchas veces fatal para los humanos. La mayoría de los casos fueron asociados al virus Andes (AND único hantavirus que ha sido informado como causante de transmisión persona a persona. Se han descrito varios linajes patogénicos del virus AND, de los cuales AND Sur, cuyo reservorio es el roedor Oligoryzomys longicaudatus, afecta a la región patagónica de Argentina y Chile. En el presente estudio se informan las manifestaciones clínicas y las características epidemiológicas de un caso de SPH. El objetivo fue describir la presentación clínica del caso, su entorno epidemiológico, el sitio probable de contagio, la variante viral implicada y su relación con los casos más cercanos notificados. Se realizó el seguimiento clínico, el diagnóstico serológico y molecular y la investigación epidemiológica, incluyendo un estudio de la población de roedores reservorios en las áreas involucradas. Se trató de una presentación clásica de SPH moderada, causada por el linaje viral AND sur y su secuencia nucleotídica se comparó con casos del sur argentino y chileno. El caso de hantavirus investigado resultó ser el más austral (48° 46´ 1.2´´ S; 70° 15´ 0´´ O notificado hasta el momento e involucró a una nueva provincia argentina.Since 1995 more than 1000 cases of hantavirus pulmonary syndrome (HPS were reported in Argentina, a severe disease and often fatal to humans. Most cases were associated with Andes virus (AND that caused few events of person-to-person transmission. Several lineages of pathogenic AND viruses have been described, including AND South, hosted by the rodent Oligoryzomys longicaudatus which affects the Patagonian region of Argentina and Chile. We studied the clinical and epidemiological characteristics of a HPS case. The objective was to describe the clinical presentation of the case, its

  11. Noble gas composition of subcontinental lithospheric mantle: An extensively degassed reservoir beneath Southern Patagonia

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    Jalowitzki, Tiago; Sumino, Hirochika; Conceição, Rommulo V.; Orihashi, Yuji; Nagao, Keisuke; Bertotto, Gustavo W.; Balbinot, Eduardo; Schilling, Manuel E.; Gervasoni, Fernanda

    2016-09-01

    Patagonia, in the Southern Andes, is one of the few locations where interactions between the oceanic and continental lithosphere can be studied due to subduction of an active spreading ridge beneath the continent. In order to characterize the noble gas composition of Patagonian subcontinental lithospheric mantle (SCLM), we present the first noble gas data alongside new lithophile (Sr-Nd-Pb) isotopic data for mantle xenoliths from Pali-Aike Volcanic Field and Gobernador Gregores, Southern Patagonia. Based on noble gas isotopic compositions, Pali-Aike mantle xenoliths represent intrinsic SCLM with higher (U + Th + K)/(3He, 22Ne, 36Ar) ratios than the mid-ocean ridge basalt (MORB) source. This reservoir shows slightly radiogenic helium (3He/4He = 6.84-6.90 RA), coupled with a strongly nucleogenic neon signature (mantle source 21Ne/22Ne = 0.085-0.094). The 40Ar/36Ar ratios vary from a near-atmospheric ratio of 510 up to 17700, with mantle source 40Ar/36Ar between 31100-6800+9400 and 54000-9600+14200. In addition, the 3He/22Ne ratios for the local SCLM endmember, at 12.03 ± 0.15 to 13.66 ± 0.37, are higher than depleted MORBs, at 3He/22Ne = 8.31-9.75. Although asthenospheric mantle upwelling through the Patagonian slab window would result in a MORB-like metasomatism after collision of the South Chile Ridge with the Chile trench ca. 14 Ma, this mantle reservoir could have remained unhomogenized after rapid passage and northward migration of the Chile Triple Junction. The mantle endmember xenon isotopic ratios of Pali-Aike mantle xenoliths, which is first defined for any SCLM-derived samples, show values indistinguishable from the MORB source (129Xe/132Xe =1.0833-0.0053+0.0216 and 136Xe/132Xe =0.3761-0.0034+0.0246). The noble gas component observed in Gobernador Gregores mantle xenoliths is characterized by isotopic compositions in the MORB range in terms of helium (3He/4He = 7.17-7.37 RA), but with slightly nucleogenic neon (mantle source 21Ne/22Ne = 0.065-0.079). We

  12. Across the Indian Ocean: A remarkable example of trans-oceanic dispersal in an austral mygalomorph spider.

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    Sophie E Harrison

    Full Text Available The Migidae are a family of austral trapdoor spiders known to show a highly restricted and disjunct distribution pattern. Here, we aim to investigate the phylogeny and historical biogeography of the group, which was previously thought to be vicariant in origin, and examine the biogeographic origins of the genus Moggridgea using a dated multi-gene phylogeny. Moggridgea specimens were sampled from southern Australia and Africa, and Bertmainus was sampled from Western Australia. Sanger sequencing methods were used to generate a robust six marker molecular dataset consisting of the nuclear genes 18S rRNA, 28S rRNA, ITS rRNA, XPNPEP3 and H3 and the mitochondrial gene COI. Bayesian and Maximum Likelihood methods were used to analyse the dataset, and the key dispersal nodes were dated using BEAST. Based on our data, we demonstrate that Moggridgea rainbowi from Kangaroo Island, Australia is a valid member of the otherwise African genus Moggridgea. Molecular clock dating analyses show that the inter-specific divergence of M. rainbowi from African congeners is between 2.27-16.02 million years ago (Mya. This divergence date significantly post-dates the separation of Africa from Gondwana (95 Mya and therefore does not support a vicariant origin for Australian Moggridgea. It also pre-dates human colonisation of Kangaroo Island, a result which is further supported by the intra-specific divergence date of 1.10-6.39 Mya between separate populations on Kangaroo Island. These analyses provide strong support for the hypothesis that Moggridgea colonised Australia via long-distance trans-Indian Ocean dispersal, representing the first such documented case in a mygalomorph spider.

  13. Extreme hydrometeorological events in the Peruvian Central Andes during austral summer and their relationship with the large-scale circulation

    Science.gov (United States)

    Sulca, Juan C.

    In this Master's dissertation, atmospheric circulation patterns associated with extreme hydrometeorological events in the Mantaro Basin, Peruvian Central Andes, and their teleconnections during the austral summer (December-January-February-March) are addressed. Extreme rainfall events in the Mantaro basin are related to variations of the large-scale circulation as indicated by the changing strength of the Bolivian High-Nordeste Low (BH-NL) system. Dry (wet) spells are associated with a weakening (strengthening) of the BH-NL system and reduced (enhanced) influx of moist air from the lowlands to the east due to strengthened westerly (easterly) wind anomalies at mid- and upper-tropospheric levels. At the same time extreme rainfall events of the opposite sign occur over northeastern Brazil (NEB) due to enhanced (inhibited) convective activity in conjunction with a strengthened (weakened) Nordeste Low. Cold episodes in the Mantaro Basin are grouped in three types: weak, strong and extraordinary cold episodes. Weak and strong cold episodes in the MB are mainly associated with a weakening of the BH-NL system due to tropical-extratropical interactions. Both types of cold episodes are associated with westerly wind anomalies at mid- and upper-tropospheric levels aloft the Peruvian Central Andes, which inhibit the influx of humid air masses from the lowlands to the east and hence limit the potential for development of convective cloud cover. The resulting clear sky conditions cause nighttime temperatures to drop, leading to cold extremes below the 10-percentile. Extraordinary cold episodes in the MB are associated with cold and dry polar air advection at all tropospheric levels toward the central Peruvian Andes. Therefore, weak and strong cold episodes in the MB appear to be caused by radiative cooling associated with reduced cloudiness, rather than cold air advection, while the latter plays an important role for extraordinary cold episodes only.

  14. Identification of virus and nematode resistance genes in the Chilota Potato Genebank of the Universidad Austral de Chile

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    Marlon López

    2015-09-01

    Full Text Available Potato Genebank of the Universidad Austral de Chile (UACh is an important gene bank in Chile. The accessions collected all over the country possess high genetic diversity, present interesting agronomic and cooking traits, and show resistance to biotic and abiotic stress. A particularly interesting subgroup of the gene bank includes the accessions collected in the South of Chile, the Chilota Potato Genebank. The focus of this study is the identification of virus and nematode resistant genes in potatoes (Solatium tuberosum L., using the RYSC3 and YES3-3B molecular markers. The Potato virus Y(PVY resistance genes Ry adg and Ry sto were identified. Furthermore, the CP60 marker was used to assess the Rx resistance gene that confers resistance to Potato virus X (PVX. In addition, the HC and GRO1-4 markers were utilized to identify the GpaVvrn_QTL and Gro1-4, resistance genes of Globodera pallida and Globodera rostochiensis, respectively. Both G. pallida and G. rostochiensis are Potato Cyst Nematodes (PCN. The plant material used in this study included leaves from 271 accessions of the gene bank. These samples were collected in the field where natural pathogen pressure of potential viruses and diseases exists. ELISA assays were run for field detection of PVY and PVX. However, there have been no previous reports of nematode presence in the plant material. The results herein presented indicate presence of virus and nematode resistance genes in accessions of the Chilota Potato Genebank. In terms of virus resistance, 99 accessions out of the 271 tested possess the Ry adg resistance gene and 17 accessions of these 271 tested have the Ry sto resistance gene. Also, 10 accessions showed positive amplification of the Rxl resistant gene marker. As to nematode resistance, 99 accessions have possible resistance to G. pallida and 54 accessions show potential resistance to G. rostochiensis as detected using the available molecular markers.

  15. Nitrogen uptake by phytoplankton in surface waters of the Indian sector of Southern Ocean during austral summer

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    Tripathy, S. C.; Patra, Sivaji; Vishnu Vardhan, K.; Sarkar, A.; Mishra, R. K.; Anilkumar, N.

    2018-03-01

    This study reports the nitrogen uptake rate (using 15N tracer) of phytoplankton in surface waters of different frontal zones in the Indian sector of the Southern Ocean (SO) during austral summer of 2013. The investigated area encompasses four major frontal systems, i.e., the subtropical front (STF), subantarctic front (SAF), polar front-1 (PF1) and polar front-2 (PF2). Southward decrease of surface water temperature was observed, whereas surface salinity did not show any significant trend. Nutrient (NO3 - and SiO4 4-) concentrations increased southward from STF to PF; while ammonium (NH4 +), nitrite (NO2 -) and phosphate (PO4 3-) remained comparatively stable. Analysis of nutrient ratios indicated potential N-limited conditions at the STF and SAF but no such scenario was observed for PF. In terms of phytoplankton biomass, PF1 was found to be the most productive followed by SAF, whereas PF2 was the least productive region. Nitrate uptake rate increased with increasing latitude, as no systematic spatial variation was discerned for NH4 + and urea (CO(NH2)2). Linear relationship between nitrate and total N-uptake reveals that the studied area is capable of exporting up to 60% of the total production to the deep ocean if the environmental settings are favorable. Like N-uptake rates the f-ratio also increased towards PF region indicating comparatively higher new production in the PF than in the subtropics. The moderately high average f-ratio (0.53) indicates potentially near equal contributions by new production and regenerated production to the total productivity in the study area. Elevation in N-uptake rates with declining temperature suggests that the SO with its vast quantity of cool water could play an important role in drawing down the atmospheric CO2 through the "solubility pump".

  16. Gaseous elemental mercury in the marine boundary layer and air-sea flux in the Southern Ocean in austral summer.

    Science.gov (United States)

    Wang, Jiancheng; Xie, Zhouqing; Wang, Feiyue; Kang, Hui

    2017-12-15

    Gaseous elemental mercury (GEM) in the marine boundary layer (MBL), and dissolved gaseous mercury (DGM) in surface seawater of the Southern Ocean were measured in the austral summer from December 13, 2014 to February 1, 2015. GEM concentrations in the MBL ranged from 0.4 to 1.9ngm -3 (mean±standard deviation: 0.9±0.2ngm -3 ), whereas DGM concentrations in surface seawater ranged from 7.0 to 75.9pgL -1 (mean±standard deviation: 23.7±13.2pgL -1 ). The occasionally observed low GEM in the MBL suggested either the occurrence of atmospheric mercury depletion in summer, or the transport of GEM-depleted air from the Antarctic Plateau. Elevated GEM concentrations in the MBL and DGM concentrations in surface seawater were consistently observed in the ice-covered region of the Ross Sea implying the influence of the sea ice environment. Diminishing sea ice could cause more mercury evasion from the ocean to the air. Using the thin film gas exchange model, the air-sea fluxes of gaseous mercury in non-ice-covered area during the study period were estimated to range from 0.0 to 6.5ngm -2 h -1 with a mean value of 1.5±1.8ngm -2 h -1 , revealing GEM (re-)emission from the East Southern Ocean in summer. Copyright © 2017 Elsevier B.V. All rights reserved.

  17. High Resolution Land Surface Modeling over the NEF Basin in the Chilean Patagonia

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    Somos-Valenzuela, M. A.

    2017-12-01

    Stakeholders and policy makers perceive that water and climate change adaptation are among the most vulnerable issues that need to be addressed. Therefore, there is a need not only from the scientific community but also from the society to use integrated methodologies that link advances in climatology with hydrology to provide data that helps us to provide adaptation strategies. The Andes and the Chilean-Argentinean Patagonia have been steadily warming up to 0.5 Celsius degrees per decades at the same time that precipitation is decreasing by 10 to 12 % per decade. In the future is expected that these trends will continue which will have impacts in the annual water budget. The Chilean Patagonia has brought a lot of attention during last decade because two hydroelectric project seek to build dams in one of the most pristine environments in the world. Also, in the Baker River basin a series of Glacier Lakes Outburst Flood have occurred which is perceived as an undeniable consequence of the effects of climate change in the glacier system. Major attention is mainly situated in the impact of climate change in glaciers contribution to sea level rise, GLOF studies given the numerous supra glacier lakes that are forming, and the study of stream flow point observation. The objectives of this research are: 1) Study the historical trends of precipitation, temperature, land cover changes and streamflow available in the Baker Basin; 2) Use a couple glacier model with a land surface model to predict the evolution of glaciers and their effects in the water availability. To address these objectives, I will analyze trends in hydro meteorology observations and correlation with trends in Land Cover Changes. Use the WRF-hydro framework to generate data in a small watershed that will allow to calibrate a high resolution hydro glaciology model to understand the partition between glaciered and non-glaciered runoff. The parameters estimated in the small domain could have the potential to

  18. Latest Pleistocene and Holocene glacial events in the Colonia valley, Northern Patagonia Icefield, southern Chile

    Science.gov (United States)

    Nimick, David A.; Mcgrath, Daniel; Mahan, Shannon; Friesen, Beverly A.; Leidich, Jonathan

    2016-01-01

    The Northern Patagonia Icefield (NPI) is the primary glaciated terrain worldwide at its latitude (46.5–47.5°S), and constraining its glacial history provides unique information for reconstructing Southern Hemisphere paleoclimate. The Colonia Glacier is the largest outlet glacier draining the eastern NPI. Ages were determined using dendrochronology, lichenometry, radiocarbon, cosmogenic 10Be and optically stimulated luminescence. Dated moraines in the Colonia valley defined advances at 13.2 ± 0.95, 11.0 ± 0.47 and 4.96 ± 0.21 ka, with the last being the first constraint on the onset of Neoglaciation for the eastern NPI from a directly dated landform. Dating in the tributary Cachet valley, which contains an ice-dammed lake during periods of Colonia Glacier expansion, defined an advance at ca. 2.95 ± 0.21 ka, periods of advancement at 810 ± 49 cal a BP and 245 ± 13 cal a BP, and retreat during the intervening periods. Recent Colonia Glacier thinning, which began in the late 1800s, opened a lower-elevation outlet channel for Lago Cachet Dos in ca. 1960. Our data provide the most comprehensive set of Latest Pleistocene and Holocene ages for a single NPI outlet glacier and expand previously developed NPI glacial chronologies.

  19. Volcanic nutrient inputs and trophic state of Lake Caviahue, Patagonia, Argentina

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    Pedrozo, Fernando L.; Temporetti, Pedro F.; Beamud, Guadalupe; Diaz, Mónica M.

    2008-12-01

    The strategies for eutrophication control, remediation, and policy management are often defined for neutral to alkaline freshwater systems, as they are most suitable for human use. The influence of nutrients on eutrophication in a naturally-acidic lake is poorly known. The main purpose of the present work is to evaluate the significance of volcanic nutrients in the control of the trophic state of the acidic Lake Caviahue, located at North Patagonia, Argentina. Acidic water systems were most studied on artificial acidified lakes, such as mining lakes in Germany or pit lakes in the United States. Lake Caviahue received a very high P load (42-192 ton P/yr) and low N load (14 ton N/yr), mainly as ammonium with quite low N:P ratios (Copahue volcano represents the main natural contribution of nutrients and acidity to the Lake Caviahue. The lake is oligotrophic in terms of CHLa. Neither the transparency nor the nutrient, dissolved or particulate, contents are to date representative of the trophic state of the lake. High P loads do not imply the eutrophication of the lake. We suggest that nitrogen and not phosphorus represents the key control nutrient in volcanically acidified lakes as TON was better related to CHLa observed (0.13-0.36 mg/m 3) in the lake. The pH increased around one unit (pH 2.0-3.0) during the last five years suggesting that the lake has not yet returned to a stable state.

  20. Spatial dynamics of Fabiana imbricata shrublands in northwestern Patagonia in relation to natural fires

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    L. Ghermandi

    2010-05-01

    Full Text Available Fire is a critical disturbance in the structuring and functioning of most Mediterranean ecosystems. In northwestern Patagonia, vegetation patterns are strongly influenced by fire and environmental heterogeneity. Dendroecology, together with satellite imagery and GIS, have been demonstrated to be useful tools in studies that relate to fire effects with patches, patterns and species dynamics at landscape scale. Such studies can be approached from landscape ecology, which has evolved in the last years supported by the development of remote sensing and GIS technologies. This study evaluates the spatial dynamic of F. imbricata in response to fire using remote sensing, GIS and dendrochronology techniques, at landscape scale. Two sites were evaluated and one of them was affected by fire in the year 1999. The digital processing images (using the NBR spectral index and the dendroecological analysis verified this. A fire, occurring in 1978, was also detected by the analysis of F. imbricata growth rings. The relation between F. imbricata shrubland dynamics and spatial configuration with fire, land topography and hydrography was established in the study area.

  1. The sea anemone Bunodactis octoradiata (Anthozoa: Actiniaria from southern Patagonia: morphological study and new records

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    Agustín Garese

    2014-10-01

    Full Text Available Bunodactis Verril, 1899 comprises at present 19 nominal species of sea anemones. The validity of the genus is under discussion. The description of the species, Bunodactis octoradiata Carlgren, 1899, is insufficient for reliable identification, and although subsequent works have provided additional information on the species, its description still needs to be complemented. Herein we describe B. octoradiata based on histological sections of the internal anatomy, and give a complete and detailed description of the external anatomy. The cnidom is composed of spirocysts, basitrichs and microbasic p-mastigophores; their distribution in the organism, sizes and relative abundances are provided. The presence of zooxanthellae is reported for the first time. Bunodactis octoradiata is distributed in groups that vary from 5.6 to 45 ind./m² in the field. Additionally, our data extends the distribution of the species along the coast of southern Patagonia (47°44'36"-49°15'13"S and 65°50'26"-67°39'45"W.

  2. Late Pleistocene ecological, environmental and climatic reconstruction based on megafauna stable isotopes from northwestern Chilean Patagonia

    Science.gov (United States)

    González-Guarda, Erwin; Domingo, Laura; Tornero, Carlos; Pino, Mario; Hernández Fernández, Manuel; Sevilla, Paloma; Villavicencio, Natalia; Agustí, Jordi

    2017-08-01

    Stable isotope analyses have been performed on the bioapatite (δ13C; δ18O) and collagen (δ13C; δ15N) of four late Pleistocene South American megafaunal taxa (Notiomastodon platensis, Equus andium, cf. Hemiauchenia paradoxa and Xenarthra indet.) to evaluate paleoclimatic and paleoenvironmental conditions as well as paleoecological features of this time period. The analyzed megafauna was found at several locations in the northwestern Chilean Patagonia (38°-42°S, 74°-71°W). The bioapatite δ13C values indicated the presence of C3 vegetation ranging from forestal to woodland areas. The collagen δ15N values pointed to temperate and humid ecosystems, and to the consumption of shrubs, trees, grasses and sedges. Mean annual temperatures estimated from bioapatite δ18OPO4 values show a similarity to modern temperatures and suggested that the megafauna under study may have lived during warm stages (interstadials) of the late Pleistocene. When comparing our results with those obtained from other South American regions, we find that the diet of this particular Chilean megafauna appears to have been more influenced by resource availability than by the potential dietary range of the taxa.

  3. A Middle Jurassic heterodontosaurid dinosaur from Patagonia and the evolution of heterodontosaurids

    Science.gov (United States)

    Pol, Diego; Rauhut, Oliver W. M.; Becerra, Marcos

    2011-05-01

    Heterodontosauridae is a morphologically divergent group of dinosaurs that has recently been interpreted as one of the most basal clades of Ornithischia. Heterodontosaurid remains were previously known from the Early Jurassic of southern Africa, but recent discoveries and studies have significantly increased the geographical and temporal range for this clade. Here, we report a new ornithischian dinosaur from the Middle Jurassic Cañadón Asfalto Formation in central Patagonia, Argentina. This new taxon, Manidens condorensis gen. et sp. nov., includes well-preserved craniomandibular and postcranial remains and represents the only diagnostic ornithischian specimen yet discovered in the Jurassic of South America so far. Derived features of its anatomy indicate that Manidens belongs to Heterodontosauridae, as the sister taxon of Heterodontosaurus and other South African heterodontosaurids. The presence of posterior dentary teeth with high crowns but lacking extensive wear facets in Manidens suggests that this form represents an intermediate stage in the development of the remarkable adaptations to herbivory described for Heterodontosaurus. The dentition of Manidens condorensis also has autapomorphies, such as asymmetrically arranged denticles in posterior teeth and a mesially projected denticle in the posteriormost teeth. At an estimated total length of 60-75 cm, Manidens furthermore confirms the small size of basal heterodontosaurids.

  4. A large Cretaceous theropod from Patagonia, Argentina, and the evolution of carcharodontosaurids

    Science.gov (United States)

    Novas, Fernando E.; Valais, Silvina; Vickers-Rich, Pat; Rich, Tom

    2005-05-01

    The Cretaceous Carcharodontosauridae is the latest clade of carnosaurs, including the largest predatory dinosaurs yet recorded. Albeit spectacular for their size, the skeletal anatomy of these theropods remains poorly-known, and their diversity was until recently restricted to two Cenomanian species: the highly derived Giganotosaurus carolinii, from southern South America, and the incompletely known Carcharodontosaurus saharicus, from northern Africa. Here we describe an older and basal member of the group, Tyrannotitan chubutensis gen. et sp. nov., from Aptian strata of Patagonia, Argentina. The new taxon gives new insights into the systematics and evolution of carcharodontosaurids and offers a better understanding of the evolution of Southern theropod faunas. We suggest that carcharodontosaurids radiated in Gondwana sharing with spinosaurids the role of top-predators until their extinction in Cenomanian Turonian times. During this interval, the diplodocoid sauropods and giant titanosaurians went extinct (probably as part of a global-scale crisis), and the smaller abelisaurid theropods took dominance, reigning until the end of the Cretaceous. Electronic Supplementary Material is available.

  5. An Assessment of Oil Pollution in the Coastal Zone of Patagonia, Argentina

    Science.gov (United States)

    Commendatore, Marta Graciela; Esteves, José Luis

    2007-11-01

    The Patagonian coast is considered a relatively pristine environment. However, studies conducted along coastal Patagonia have showed hydrocarbon pollution mostly concentrated at ports that have fishing, oil loading, general merchant, and/or tourist activities. A high value of total aliphatic hydrocarbons (TAH) was found at the Rawson fishing port (741 μg/g dw). In other ports with and without petroleum-related activities, hydrocarbon values were approximately 100 μg/g dw. The highest values for TAH and total aromatic hydrocarbons (TArH) were found in Faro Aristizábal, north of San Jorge gulf (1304 and 737 μg/g dw, respectively). This is very likely the result of petroleum-related activities at the Comodoro Rivadavia, Caleta Cordova, and Caleta Olivia ports located within this gulf. In other coastal areas away from potential anthropogenic sources, hydrocarbon values were less than 2 and 3 μg/g dw for TAH and TArH, respectively. This review of published and unpublished information suggests that ports are important oil pollution sources in the Patagonian coast. More detailed studies are needed to evaluate the area affected by port activities, to understand the mechanisms of hydrocarbon distribution in surrounding environments, and to assess bioaccumulation in marine organisms. Despite that some regulations exist to control oil pollution derived from port and docked vessel activities, new and stricter management guidelines should be implemented.

  6. Helminth communities of two populations of Myotis chiloensis (Chiroptera: Vespertilionidae from Argentinean Patagonia

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    Antonella C. Falconaro

    2018-04-01

    Full Text Available Most of the studies on chiropteran endoparasites in Argentina come from the Central and Northeast regions of the country, and there is only one parasitological study of bats from the Argentinean Patagonia. The aim of this study is to describe the helminth fauna of 42 Myotis chiloensis, comparing the composition and the structure of the endoparasite communities between two populations, inhabiting different environments in Andean humid forest and the ecotone between forest and Patagonian steppe. A total of 697 helminths were recovered from 33 bats: five species of trematodes, Ochoterenatrema sp., Paralecithodendrium sp., Parabascus limatulus, Parabascus sp., and Postorchigenes cf. joannae, two species of cestodes, Vampirolepis sp. 1 and Vampirolepis sp. 2, and three species of nematodes, Allintoshius baudi, Physaloptera sp., and Physocephalus sp. All the helminths, but Physocephalus sp., were recovered from the small and large intestine. This is the first survey of M. chiloensis’ helminth fauna. All the species, but A. baudi, represent new records of helminths in Patagonian bats. There were differences of parasite species richness between localities and both bat populations share almost half of the endoparasite species. Different preferences for intestinal regions were found for three species of trematodes in the bats from the site in the humid forest. Myotis chiloensis serves as both a definitive and intermediate host for endoparasites in the Patagonian ecosystem. Keywords: Bats, Parasites, South America

  7. Nuisance ecology: do scavenging condors exact foraging costs on pumas in Patagonia?

    Science.gov (United States)

    Elbroch, L Mark; Wittmer, Heiko U

    2013-01-01

    Predation risk describes the energetic cost an animal suffers when making a trade off between maximizing energy intake and minimizing threats to its survival. We tested whether Andean condors (Vultur gryphus) influenced the foraging behaviors of a top predator in Patagonia, the puma (Puma concolor), in ways comparable to direct risks of predation for prey to address three questions: 1) Do condors exact a foraging cost on pumas?; 2) If so, do pumas exhibit behaviors indicative of these risks?; and 3) Do pumas display predictable behaviors associated with prey species foraging in risky environments? Using GPS location data, we located 433 kill sites of 9 pumas and quantified their kill rates. Based upon time pumas spent at a carcass, we quantified handling time. Pumas abandoned >10% of edible meat at 133 of 266 large carcasses after a single night, and did so most often in open grasslands where their carcasses were easily detected by condors. Our data suggested that condors exacted foraging costs on pumas by significantly decreasing puma handling times at carcasses, and that pumas increased their kill rates by 50% relative to those reported for North America to compensate for these losses. Finally, we determined that the relative risks of detection and associated harassment by condors, rather than prey densities, explained puma "giving up times" (GUTs) across structurally variable risk classes in the study area, and that, like many prey species, pumas disproportionately hunted in high-risk, high-resource reward areas.

  8. Condiciones productivas y exigencias de calidad en la fruticultura de la Patagonia argentina

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    Belén Alvaro

    2013-01-01

    Full Text Available La producción alimentaria está regida, a partir de los años noventa, por requerimientos de calidad e inocuidad que modifican sustancialmente las condiciones productivas del eslabón primario, en el marco de una reestructuración del sistema agroalimentario mundial. El caso en estudio aborda la conformación social de la cadena frutícola localizada en el norte de la Patagonia argentina, donde estos requerimientos se formalizan, entre otros, en las buenas prácticas agrícolas, abordadas como dispositivos de control que interpelan y vuelven complejas las condiciones de reproducción social de los chacareros, como productores independientes en la cadena, con impactos en sus trayectorias vitales y productivas. Se consultaron fuentes secundarias, y se realizó el relevamiento primario de casos. Las conclusiones se inscriben en las tensiones entre configuraciones productivas locales y avances de los controles del capital concentrado.

  9. A Middle Jurassic abelisaurid from Patagonia and the early diversification of theropod dinosaurs.

    Science.gov (United States)

    Pol, Diego; Rauhut, Oliver W M

    2012-08-22

    Abelisaurids are a clade of large, bizarre predatory dinosaurs, most notable for their high, short skulls and extremely reduced forelimbs. They were common in Gondwana during the Cretaceous, but exceedingly rare in the Northern Hemisphere. The oldest definitive abelisaurids so far come from the late Early Cretaceous of South America and Africa, and the early evolutionary history of the clade is still poorly known. Here, we report a new abelisaurid from the Middle Jurassic of Patagonia, Eoabelisaurus mefi gen. et sp. nov., which predates the so far oldest known secure member of this lineage by more than 40 Myr. The almost complete skeleton reveals the earliest evolutionary stages of the distinctive features of abelisaurids, such as the modification of the forelimb, which started with a reduction of the distal elements. The find underlines the explosive radiation of theropod dinosaurs in the Middle Jurassic and indicates an unexpected diversity of ceratosaurs at that time. The apparent endemism of abelisauroids to southern Gondwana during Pangean times might be due to the presence of a large, central Gondwanan desert. This indicates that, apart from continent-scale geography, aspects such as regional geography and climate are important to reconstruct the biogeographical history of Mesozoic vertebrates.

  10. Gamma irradiation as a phytosanitary treatment for fresh pome fruits produced in Patagonia

    Science.gov (United States)

    Pérez, J.; Lires, C.; Horak, C.; Pawlak, E.; Docters, A.; Kairiyama, E.

    2009-07-01

    Argentina produces 1.8 million tons/year of apples ( Malus domestica L.) and pears ( Pyrus communis L.) in the Patagonia region. Cydia pomonella, codling moth, and Grapholita molesta, Oriental fruit moth, ( Lepidoptera: Tortricidae) are quarantine pests in pome fruits. Irradiation is a promising phytosanitary treatment because a dose of 200 Gy completely prevents pest adult emergence. A pilot irradiation process of commercially packaged 'Red Delicious' apples and 'Packham's Triumph' pears was performed in an irradiation facility with a Cobalt 60 source. Quality analyses were carried out at 0, 2, 4, 6 and 8 months of storage (1 °C, RH 99%) to evaluate fruit tolerance at 200, 400 and 800 Gy. Irradiation at 200 and 400 Gy had no undesirable effects on fruit quality (pulp firmness, external colour, soluble solids content (SSC), titratable acidity (TA) and sensory evaluations). Irradiation of 'Red Delicious' apples and 'Packham's Triumph' pears can be applied as a commercial quarantine treatment with a minimum absorbed dose of 200 Gy (to control codling moth and Oriental fruit moth) and <800 Gy (according to quality results).

  11. Analysis of admixture and genetic structure of two Native American groups of Southern Argentinean Patagonia.

    Science.gov (United States)

    Sala, Andrea; Corach, Daniel

    2014-03-01

    Argentinean Patagonia is inhabited by people that live principally in urban areas and by small isolated groups of individuals that belong to indigenous aboriginal groups; this territory exhibits the lowest population density of the country. Mapuche and Tehuelche (Mapudungun linguistic branch), are the only extant Native American groups that inhabit the Argentinean Patagonian provinces of Río Negro and Chubut. Fifteen autosomal STRs, 17 Y-STRs, mtDNA full length control region sequence and two sets of Y and mtDNA-coding region SNPs were analyzed in a set of 434 unrelated individuals. The sample set included two aboriginal groups, a group of individuals whose family name included Native American linguistic root and urban samples from Chubut, Río Negro and Buenos Aires provinces of Argentina. Specific Y Amerindian haplogroup Q1 was found in 87.5% in Mapuche and 58.82% in Tehuelche, while the Amerindian mtDNA haplogroups were present in all the aboriginal sample contributors investigated. Admixture analysis performed by means of autosomal and Y-STRs showed the highest degree of admixture in individuals carrying Mapuche surnames, followed by urban populations, and finally by isolated Native American populations as less degree of admixture. The study provided novel genetic information about the Mapuche and Tehuelche people and allowed us to establish a genetic correlation among individuals with Mapudungun surnames that demonstrates not only a linguistic but also a genetic relationship to the isolated aboriginal communities, representing a suitable proxy indicator for assessing genealogical background.

  12. Saccharomyces uvarum is responsible for the traditional fermentation of apple chicha in Patagonia.

    Science.gov (United States)

    Rodríguez, Maria E; Pérez-Través, Laura; Sangorrín, Marcela P; Barrio, Eladio; Querol, Amparo; Lopes, Christian A

    2017-01-01

    Apple chicha is a fresh low alcoholic beverage elaborated by aboriginal communities of Andean Patagonia (Argentina and Chile). In the present work, we identified the yeast microbiota associated with this fermentation, and characterized genetically those belonging to the genus Saccharomyces. Both Saccharomyces cerevisiae and S. uvarum were found in the analyzed fermentations. Phylogenetic and population structure analyses based on genes sequence analysis were carried out for both S. cerevisiae and S. uvarum strains obtained in this study and a set of additional strains from diverse origins. The results demonstrate that S. cerevisiae strains from apple chicha belong to the big group of wine/European strains of this species, while S. uvarum strains were included in the Holartic population of this species. Additionally, some S. uvarum strains from chichas evidenced as an admixture of both pure Holartic and pure South American populations. Our results suggest that Holartic strains could have been introduced in South America together with the domestication of apple trees by Mapuche communities. This Holartic population suffered admixis with the naturally present South American population of this species, originating strains bearing genetic features from the two populations, detectable in both chichas and natural habitats. © FEMS 2016. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.

  13. Chemosensory perception and medicinal plants for digestive ailments in a Mapuche community in NW Patagonia, Argentina.

    Science.gov (United States)

    Molares, Soledad; Ladio, Ana

    2009-06-25

    To document the richness of plant species used in gastrointestinal disorders and to investigate about the criteria of aroma and flavor associated with its recognition, classification, selection and use. Ethnobotanical fieldwork consisted of interviews to 30 inhabitants living in a Mapuche community of Northwestern Patagonia; data collected was analyzed by means of non-parametric statistics. This work records 75 ethnospecies, pertaining to 40 botanic families. Lamiaceae, Asteraceae and Chenopodiaceae were the most frequently mentioned and described in terms of smell and taste. Most of species (69%) have notable aroma and/or flavor characteristics. The species presenting highest consensus in the population are positively associated with a higher frequency of organoleptic descriptions. In addition, local people consider these perceptions to be potentially useful in the search for substitutes when species are scarce or disappear from a locality. It is possible to establish a preliminary system of classification of medicinal plants based on their organoleptic characteristics and relate this to their effects on health. Moreover the cultural interpretation of smell and taste is of great heuristic importance to ethnopharmacology, in that it indicates which plants are most likely to contain the main active ingredients sought.

  14. Dietary analysis of Homonota darwini (Squamata: Gekkoni-dae in Northern Patagonia

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    Marcelo E. KUN, Carla PIANTONI, John D. KRENZ, Nora R. IBARGÜENGOYTÍA

    2010-08-01

    Full Text Available Our study investigated the diet of the southernmost gecko in the world, Homonota darwini. Fifty-three specimens were captured during spring and summer in four locations in Patagonia, Argentina. The stomach contents of the specimens were identified, and we found that prey consisted of six main groups: Coleoptera, Hymenoptera, Homoptera and Araneae, and the adults and larvae of moth Lepidoptera. Lepidoptera was the major dietary component. The presence of ants and moths as common prey suggests an ambush feeding strategy. In spring, females consumed more ants than males although no other dietary differences between males and females were evident. We found nine geckos with empty stomachs and six parasitized by nematodes. Presence of empty stomachs corroborates previous observations of other nocturnal geckos and non-gecko lizards. Reduced foraging success of nocturnal lizards could be due to difficulty in prey detection due to dim light, reduced or erratic activity of insect prey at night, or shorter activity times of geckos relative to diurnal success. Sex and season were not associated with the incidence of empty stomachs. Principal component analysis showed that four food alternatives correlated with season. The constraint of nocturnality, coupled with low night-time temperatures restricting feeding to only a few hours after sunset, appear to have caused a generality of diet which may limit energy acquisition. We conclude that H. darwini is an arthropod generalist and likely an ambush forager, as are many other nocturnal gekkonids [Current Zoology 56 (4: 406–410, 2010].

  15. Trace elements deposition in the Tierra del Fuego region (south Patagonia) by using lichen transplants after the Puyehue-Cordón Caulle (north Patagonia) volcanic eruption in 2011.

    Science.gov (United States)

    Conti, Marcelo Enrique; Jasan, Raquel; Finoia, Maria Grazia; Iavicoli, Ivo; Plá, Rita

    2016-04-01

    Lichen Usnea barbata transplants were tested as a biomonitor of atmospheric deposition in an apparently pristine environment that is Tierra del Fuego region (Patagonia, Argentina). The present survey is connected with the volcanic eruption that started in north Patagonia on June 4, 2011 from the Puyehue-Cordón Caulle volcano, Chile (north Patagonia, at 1700 km of distance of our sampling sites). Lichens were collected in September 2011 (one month of exposure) and September 2012 (1 year of exposure) in 27 sites covering the northern region of the province where trees are not present. The atmospheric deposition of 27 elements by using Neutron Activation Analysis (NAA) was determined in the collected samples. The first aim of the study was to evaluate the influence of the volcanic eruption on the regional atmospheric deposition comparing our results with baseline data we determined in U. barbata in 2006 in the same sites. The second aim was to test possible patterns of bioaccumulation between the two sampling campaigns after the volcanic eruption. With respect to 2006 baseline levels, we found significant higher levels for As, Ba, Co, Cr, Cs, Na, Sb and U in lichens collected after 1 month of exposure (first sampling campaign--2011). Between the two sampling campaigns (2011-2012) after the eruption, lichens reflected the natural contamination by volcanic ashes with significantly higher median levels of Br, Cr, Fe, K, Na, Sc, and Se. Results confirmed the very good aptitude of U. barbata to reflect the levels of elements in the environment at global scale and to reflect the volcanic emissions at distant places. Volcanic eruptions cause the emission in the atmosphere of elevated levels of particulate matter. In this regard, our findings demonstrate the importance to evaluate the metal composition of the particles to avoid possible health effects.

  16. Caracterización de un proceso de biorremediación de hidrocarburos en deficiencia de nitrógeno en un suelo de la Patagonia Argentina

    OpenAIRE

    Acuña, Adrián Javier; Pucci Ceima, Oscar Héctor; Pucci Bissetta, Graciela Natalia

    2008-01-01

    La zona central de la Patagonia, Argentina, se encuentra sometida a explotación petrolera y sus suelos se caracterizan por ser deficientes en nitrógeno. Esto causaría un efecto negativo en los procesos de atenuación natural que se desarrollan en los suelos contaminados con hidrocarburos. El objeto de este estudio fue determinar cual es el efecto de la deficiencia de nitrógeno sobre la biodegradación de los hidrocarburos en un suelo de la Patagonia, Argentina. Se trabajó con tres micr...

  17. Redescripción de la obrera de Myrmelachista gallicola (Hymenoptera: Formicidae y primera cita para la provincia de La Pampa (Argentina

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    Estela M. QUIRÁN

    2006-01-01

    Full Text Available Se redescribe la obrera de Myrmelachista gallicola Mayr y se cita por primera vez para la provincia de La Pampa (Argentina. El material estudiado está compuesto por obreras y fue recolectado sobre Prosopis caldenia Burkart (Fabaceae, dentro de las agallas de Tetradiplosis sp. (Diptera: Cecidomyiidae, en la periferia de la ciudad de Santa Rosa, provincia de La Pampa.

  18. The diet of the South American sea lion (Otaria flavescens at Río Negro, Patagonia, Argentina, during the winter-spring period Dieta del lobo marino de un pelo sudamericano (Otaria flavescens en Río Negro, Patagonia, Argentina, durante el invierno y primavera

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    Raimundo L. Bustos

    2012-12-01

    Full Text Available The South American sea lion, Otaria flavescens (Shaw, 1800 population is steadily expanding along the Patagonian coast of Argentina in the last decades. However, little is known about the feeding ecology of the species in the area. The aim of this study was to analyze the food habits of O. flavescens from 91 scats collected at Río Negro province, during the winter and spring of 2005. Fish occurred in 96% of scats containing prey remains, followed by cephalopods (26%. Raneya brasiliensis (Kaup, 1856 was the most frequent and abundant species occurring in 58.6% of samples and constituting almost 50% of fish predated. Second in importance were Porichthys porosissimus (Cuvier, 1829 and Cynoscion guatucupa (Cuvier, 1830 in terms of occurrence (%FO 20.7 and numbers (29.6% respectively. The squid Loligo gahi (d'Orbigny, 1835 was the most frequent cephalopod prey (42.1%, whereas Octopus tehuelchus (d'Orbigny, 1834 was the most abundant (77%. The higher amount and diversity of prey found in the spring in comparison with the winter season might be related to a higher feeding activity of seals or to a seasonal increase in food availability in the area.La población del lobo marino de un pelo sudamericano Otaria flavescens (Shaw, 1800 ha experimentado un crecimiento continuo en las ultimas décadas en las costas de la Patagonia Argentina. Sin embargo, poco se conoce sobre la ecología trófica de la especie en el área. El objetivo de este estudio fue analizar los hábitos alimentarios de O. flavescens a partir de 91 fecas colectadas en la provincia de Río Negro, durante el invierno y la primavera del 2005. Los peces estuvieron presentes en el 96% de las fecas que contenían remanentes presas, seguidos por los cefalópodos (26%. Raneya brasiliensis (Kaup, 1856 fue la especie mas frecuente y abundante ocurriendo en el 58.6% de las muestras y constituyendo casi el 50% de los peces predados. Le siguieron en importancia Porichthys porosissimus (Cuvier, 1829 y

  19. Transcriptome Sequencing and Differential Gene Expression Analysis of Delayed Gland Morphogenesis in Gossypium australe during Seed Germination

    Science.gov (United States)

    Tao, Tao; Zhao, Liang; Lv, Yuanda; Chen, Jiedan; Hu, Yan; Zhang, Tianzhen; Zhou, Baoliang

    2013-01-01

    The genus Gossypium is a globally important crop that is used to produce textiles, oil and protein. However, gossypol, which is found in cultivated cottonseed, is toxic to humans and non-ruminant animals. Efforts have been made to breed improved cultivated cotton with lower gossypol content. The delayed gland morphogenesis trait possessed by some Australian wild cotton species may enable the widespread, direct usage of cottonseed. However, the mechanisms about the delayed gland morphogenesis are still unknown. Here, we sequenced the first Australian wild cotton species ( Gossypium australe ) and a diploid cotton species ( Gossypium arboreum ) using the Illumina Hiseq 2000 RNA-seq platform to help elucidate the mechanisms underlying gossypol synthesis and gland development. Paired-end Illumina short reads were de novo assembled into 226,184, 213,257 and 275,434 transcripts, clustering into 61,048, 47,908 and 72,985 individual clusters with N50 lengths of 1,710 bp, 1544 BP and 1,743 bp, respectively. The clustered Unigenes were searched against three public protein databases (TrEMBL, SwissProt and RefSeq) and the nucleotide and protein sequences of Gossypium raimondii using BLASTx and BLASTn. A total of 21,987, 17,209 and 25,325 Unigenes were annotated. Of these, 18,766 (85.4%), 14,552 (84.6%) and 21,374 (84.4%) Unigenes could be assigned to GO-term classifications. We identified and analyzed 13,884 differentially expressed Unigenes by clustering and functional enrichment. Terpenoid-related biosynthesis pathways showed differentially regulated expression patterns between the two cotton species. Phylogenetic analysis of the terpene synthases family was also carried out to clarify the classifications of TPSs. RNA-seq data from two distinct cotton species provide comprehensive transcriptome annotation resources and global gene expression profiles during seed germination and gland and gossypol formation. These data may be used to further elucidate various mechanisms and

  20. Maintenance of Austral Summertime Upper-Tropospheric Circulation over Tropical South America: The Bolivian High-Nordeste Low System.

    Science.gov (United States)

    Chen, Tsing-Chang; Weng, Shu-Ping; Schubert, Siegfried

    1999-07-01

    Using the NASA/GEOS reanalysis data for 1980-95, the austral-summer stationary eddies in the tropical-subtropical Southern Hemisphere are examined in two wave regimes: long and short wave (wave 1 and waves 2-6, respectively). The basic structure of the Bolivian high-Nordeste low (BH-NL) system is formed by a short-wave train across South America but modulated by the long-wave regime. The short-wave train exhibits a monsoonlike vertical phase reversal in the midtroposphere and a quarter-wave phase shift relative to the divergent circulation. As inferred from (a) the spatial relationship between the streamfunction and velocity potential and (b) the structure of the divergent circulation, the short-wave train forming the BH-NL system is maintained by South American local heating and remote African heating, while the long-wave regime is maintained by western tropical Pacific heating.The maintenance of the stationary waves in the two wave regimes is further illustrated by a simple diagnostic scheme that includes the velocity-potential maintenance equation (which links velocity potential and diabatic heating) and the streamfunction budget (which is the inverse Laplacian transform of the vorticity equation). Some simple relationships between streamfunction and velocity potential for both wave regimes are established to substantiate the links between diabatic heating and streamfunction; of particular interest is a Sverdrup balance in the short-wave regime. This simplified vorticity equation explains the vertical structure of the short-wave train associated with the BH-NL system and its spatial relationship with the divergent circulation.Based upon the diagnostic analysis of its maintenance a simple forced barotropic model is adopted to simulate the BH-NL system with idealized forcings, which imitates the real 200-mb divergence centers over South America, Africa, and the tropical Pacific. Numerical simulations demonstrate that the formation of the BH-NL system is affected

  1. Rainforest conifers of Eocene Patagonia: attached cones and foliage of the extant Southeast Asian and Australasian genus Dacrycarpus (Podocarpaceae).

    Science.gov (United States)

    Wilf, Peter

    2012-03-01

    Eocene caldera-lake beds at Laguna del Hunco (LH, ca. 52.2 Ma) and Río Pichileufú (RP, ca. 47.7 Ma) in Argentine Patagonia provide copious information about the biological history of Gondwana. Several plant genera from these sites are known as fossils from southern Australia and New Zealand and survive only in Australasian rainforests. The potential presence of Dacrycarpus (Podocarpaceae) holds considerable interest due to its extensive foliage-fossil record in Gondwana, its remarkably broad modern distribution in Southeast Asian and Australasian rainforests, its high physiological moisture requirements, and its bird-dispersed seeds. However, the unique seed cones that firmly diagnose Dacrycarpus were not previously known from the fossil record. I describe and interpret fertile (LH) and vegetative (LH and RP) material of Dacrycarpus and present a nomenclatural revision for fossil Dacrycarpus from South America. Dacrycarpus puertae sp. nov. is the first fossil occurrence of the unusual seed cones that typify living Dacrycarpus, attached to characteristic foliage, and of attached Dacrycarpus pollen cones and foliage. Dacrycarpus puertae is indistinguishable from living D. imbricatus (montane, Burma to Fiji). Dacrycarpus chilensis (Engelhardt) comb. nov. is proposed for Eocene vegetative material from Chile. Modern-aspect Dacrycarpus was present in Eocene Patagonia, demonstrating an astonishingly wide-ranging paleogeographic history and implying a long evolutionary association with bird dispersers. Dacrycarpus puertae provides the first significant Asian link for Eocene Patagonian floras, strengthens the biogeographic connections from Patagonia to Australasia across Antarctica during the warm Eocene, and indicates high-rainfall paleoenvironments.

  2. Tillandsia myosura Griseb. ex Baker (Bromeliaceae, una nueva cita para la flora de la Provincia de Buenos Aires, (Argentina

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    Juan Manuel Cellini

    2012-07-01

    Full Text Available Se cita por primera vez para la Provincia de Buenos Aires Tillandsia myosura, coleccionada en las inmediaciones del arroyo Pereyra, Parque Provincial y Reserva de la Biosfera Parque Pereyra Iraola (Partido de Berazategui, Buenos Aires, Argentina. Esta especie, conocida hasta el presente sólo para el sur de Uruguay y las provincias de Catamarca, Córdoba, Jujuy, La Rioja, La Pampa, Mendoza, Salta, San Juan, San Luis, Santiago del Estero y Tucumán en Argentina es citada por primera vez para la Provincia de Buenos Aires, ampliándose su límite sur de distribución. En el presente trabajo se describe e ilustra la especie, y se presenta una clave para diferenciarla de especies afines de distribución congruente.

  3. INVITACIÓN AL GEOTURISMO. REFLEXIONES SOBRE GEODIVERSIDAD Y POTENCIAL GEOTURÍSTICO EN LA PATAGONIA ARGENTINA

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    María de la Paloma Martínez Fernandez

    2013-12-01

    Full Text Available Geotourism as a type of nature tourism comes to fill an empty field on the use of geological resources of the landscape in Argentina. With an approach sustained by the ideas and progresses achieved along the last decades about sustainable tourism, geosites and geoparks are getting a boost worldwide. However, in Argentina this concept has not being incorporated yet within public or private touristic policies, despite owning a valuable geodiversity both scientific or aesthetically. Based on a review of concepts and foreign experiences on the subject, this article analyses the possibilities and parameters for geotourism developing in Argentinean Patagonia.

  4. La evolución del espacio social y urbano en la capital de la Patagonia chilena. Punta Arenas

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    Luis Inostroza Pino

    2008-05-01

    Razones del contexto mundial apoyadas por adecuadas decisiones a nivel local, son las que permitieron el desarrollo de la Patagonia y de la ciudad de Punta Arenas fundamentalmente hasta fines del siglo XIX. La iniciación del tráfico regular entre Europa y el Pacífico, con recalada obligada en la colonia, y las medidas de Puerto libre y de incentivo a la inmigración de colonos nacionales y extranjeros, influirán decisivamente en ese desarrollo. El modesto pueblo se transforma en un importante centro urbano.

  5. Madera de Pinus ponderosa en Patagonia Argentina : Jornada Forestal Tecnológica

    OpenAIRE

    Refort, María Mercedes; Keil, Gabriel Darío; Spavento, Elena

    2013-01-01

    El día 15 de noviembre de 2012 se realizó en el Edificio de Bosques de la Facultad de Ciencias Agrarias y Forestales de la UNLP, la Primera Jornada Tecnológica sobre Madera de Pinus ponderosa en Patagonia Argentina, destinadas a profesionales de diferentes áreas, estudiantes, investigadores y docentes. Las Jornadas fueron organizadas por el Laboratorio de Investigaciones en Madera (LIMAD) y la Secretaría de Investigaciones de la Facultad de Ciencias Agrarias y Forestales, UNLP y auspiciadas p...

  6. Diacronía y sincronía del contacto lingüístico en Patagonia sur

    OpenAIRE

    Virkel, Ana Ester

    2012-01-01

    Desde su integración al Estado argentino, la región patagónica fue receptora de inmigrantes de muy diversas procedencias, quienes, integrándose con las etnias aborígenes preexistentes, configuraron un contexto multiétnico y multicultural, con la consiguiente diversidad lingüística. El propósito de este trabajo es trazar un esquemático itinerario a través de la historia lingüística de Chubut, Patagonia sur, focalizando el interés en una serie de procesos migratorios que impactan de modo sus...

  7. El patrimonio cultural en la oferta turística de la provincia de Buenos Aires

    OpenAIRE

    Conti, Alfredo Luis

    2011-01-01

    La provincia de Buenos Aires ocupa un lugar destacado entre los destinos turísticos nacionales a partir, principalmente, de un recurso, la costa marítima. En las últimas décadas, se incorporaron a la oferta otros productos, basados en recursos tales como el espacio rural o la gastronomía. El territorio provincial posee un rico patrimonio cultural, integrado por componentes materiales e inmateriales, que puede contribuir a la diversificación de la oferta turística y, de este modo, al desarroll...

  8. Posicionamiento en buscadores de las webs oficiales de capitales de provincia españolas

    OpenAIRE

    Rovira, Cristòfol; Fernández Cavia, Josep; Pedraza Jiménez, Rafael; Huertas Roig, Asunción

    2013-01-01

    Se estudia el posicionamiento en Google y Yahoo de las sedes web de las grandes corporaciones municipales/nespañolas en búsquedas con la marca turística de la ciudad. Se analiza si se están promocionando de forma adecuada/nestas marcas en internet. Se presentan resultados del seguimiento diario del posicionamiento en Google y Yahoo durante/n2009 de las búsquedas por las marcas turísticas de las capitales de provincia españolas. Los resultados indican que un/n66% de las sedes web oficiales est...

  9. El acoso escolar en Educación Primaria en la provincia de Huelva

    OpenAIRE

    Ávila Fernández, José Antonio

    2013-01-01

    El resumen que a continuación se presenta, es el reflejo del trabajo de tesis doctoral realizado bajo el título «El Acoso Escolar en Educación Primaria en la Provincia de Huelva». En los últimos años ha existido una preocupación social en relación al tema de la violencia escolar, reconociéndose como un problema común. Los medios de comunicación se han ocupado de difundir situaciones límites relacionadas con e! comportamiento de escolares; a nivel internacional se ha afrontado la investigac...

  10. Conocimiento y cobertura vacunal autodeclarada en inmigrantes adultos residentes en la provincia de Alicante

    OpenAIRE

    Tuells Hernández, José; Caballero Pérez, Pablo; Montagud Penadés, Emilia; Nolasco Bonmatí, Andreu

    2014-01-01

    Introducción: Existe una estimable probabilidad de cobertura vacunal insuficiente entre la población inmigrante. Los estudios realizados se centran en población infantil. Este trabajo explora la opinión y conocimientos sobre vacunas, así como la cobertura vacunal autodeclarada en población adulta inmigrante en edad laboral. Métodos: Estudio transversal basado en un cuestionario específico dirigido a inmigrantes entre 18-65 años residentes en la provincia de Alicante. Se realizó mediante entre...

  11. Vulnerabilidades frente amenazas naturales en establecimientos de salud de la Provincia de Santa Elena

    OpenAIRE

    Bertha De Monserrate

    2015-01-01

    Un equipo de análisis de riesgos de la Universidad Estatal Península de Santa Elena y Cooperazione Internationale durante el año 2010, llevó a cabo un estudio de vulnerabilidad de los establecimientos de salud de la provincia de Santa Elena frente a amenazas naturales de tsunami, inundación, erosión y movimiento en masa. El objetivo: evaluar los establecimientos de salud por tipos y nivel de atención, mediante la aplicación de los estándares establecidos en el Manual de Licenciamiento de Mini...

  12. El marco legal del patrimonio cultural en la provincia de Salta

    OpenAIRE

    Mulvany, Eleonora

    2002-01-01

    En esta comunicación se presentan los resultados obtenidos en el estudio de la Ley 6649 de la Provincia de Salta. Esta ley se relaciona con la protección del patrimonio arqueológico e incluye artículos sobre los bienes arqueológicos. In this paper are presented the results obtained in the study of the Salta´s Province Law 6649. At present, this law is the business of cultural patrimony protection and inclose articles about archaeological goods.

  13. Fertilidad de los suelos de secano en la provincia de Zaragoza

    OpenAIRE

    Montañés García, Luis; Sanz Encinas, Manuel; Heras Cobo, Luis

    1991-01-01

    El presente trabajo tiene como objetivo prioritario la evaluación de las características que influyen en la fertilidad de los suelos dedicados al cultivo de secano en la provincia de Zaragoza. El conocimiento de estas condiciones de fertilidad permitirá un diagnóstico del potencial productivo de nuestro secano y nos proporcionará una valiosa información de base para emprender aquellas acciones que puedan contribuir a mejorarlo, de manera especial las orientadas a una racionalización del a...

  14. Contrato de maquinaria agrícola en el noroeste de la provincia de Buenos Aires

    OpenAIRE

    Ullua, Adrián

    2017-01-01

    En el presente trabajo se aborda el contrato de maquinaria agrícola, citando a diversos autores y su encuadre jurídico. Los cambios introducidos en el nuevo Código Civil y Comercial. La tipicidad de este tipo de contratos y las modalidades de cómo se desarrolla en el noroeste de la provincia de Aires. Para este último punto se ha utilizado el método de entrevistas, tanto a contratistas como productores agropecuarios, para tratar de vislumbrar, si se trata de contratos atípicos o subtipos cont...

  15. Caracterización de manantiales del departamento Ancasti en la provincia de Catamarca (Argentina)

    OpenAIRE

    Denim, Pablo; l Instituto Nacional de Tecnología, Estación Experimental Agropecuaria Catamarca, Ruta 33- Km 4,5. Valle Viejo, Catamarca, Argentina.; Cano, Laura; Instituto Nacional de Tecnología, Estación Experimental Agropecuaria Catamarca, Ruta 33- Km 4,5. Valle Viejo, Catamarca, Argentina.; Castro, Ornella; l Instituto Nacional de Tecnología, Estación Experimental Agropecuaria Catamarca, Ruta 33- Km 4,5. Valle Viejo, Catamarca, Argentina.

    2015-01-01

    Las poblaciones de la provincia de Catamarca, Argentina no tienen acceso al agua o el acceso es muy precario. Entre estas poblaciones se encuentran las de El Huayco, El Arbolito y El Puesto Nuevo, en el departamento Ancasti, donde cada familia y una escuela de la zona poseen su propia vertiente. En estos lugares se realizaron obras de captación de agua, a fin de que cada familia y la escuela tengan disponibilidad de este recurso. Con el objetivo de conocer la calidad del agua de abastecimient...

  16. Fibrosis pulmonar idiopática en un ecuatoriano adulto de la provincia de Riobamba

    OpenAIRE

    Remón Ramírez, Leticia; Uvidia Cepeda, Galo; Castro Hayes, Orlando Jesús

    2016-01-01

    Se presenta el caso clínico de un paciente de 52 años, expuesto a las cenizas del volcán Tungurahua en erupción, quien acudió a la Consulta de Medicina Familiar Comunitaria del Cantón Guano, provincia ecuatoriana de Riobamba, por presentar cuadro de tos productiva en horario matutino, mucoide de coloración blanco amarillenta, toma del estado general, fiebre vespertina, pérdida de apetito y peso. Según los resultados radiográficos y tomográficos presentó signos sugestivos de tuberculosis pulmo...

  17. Historia del Boxeo en la provincia de las Tunas hasta 1990

    OpenAIRE

    Etián Jiménez Espinosa; Guillermo Montero Quesada; Luís Fidel Velásquez Ortega

    2009-01-01

    La presente investigación hace un estudio sobre los antecedentes, génesis, evolución y desarrollo del boxeo en la provincia en Las Tunas, el cual se realiza a partir de una periodización hasta nuestros días. El estudio responde a una de las problemáticas más complejas y necesarias del territorio, que responde a la carencia de información bibliográfica para impartir con la calidad pertinente la asignatura Historia del Deporte, en todos sus ámbitos – internacional, nacional y local- y con un en...

  18. Nuevas variedades de rocas ornamentales de la provincia de Buenos Aires : II parte

    OpenAIRE

    Ronconi, Néstor; Marchioni, Daniela; Echeveste, Horacio José

    1994-01-01

    En la presente contribución se exponen los resultados de la segunda etapa de un trabajo de prospección geológico-minera que se está realizando en.el ambiente serrano de la provincia de Buenos Aires en relación con la presencia de rocas con aptitudes ornamentales y cuyo primer adelanto fue plasmado en un trabajo publicado por la Comisión de Investigaciones Científicas en 1991. Dado que el territorio provincial ha sido escasamente explorado en cu...

  19. Catálogo de los puentes proyectados por Jules Sagebien en la provincia de Matanzas.

    OpenAIRE

    Luis R. González Arestuche; C. J. Rolo Pico; Rubén A. Delgado Rodríguez

    2014-01-01

    Esta investigación recopila en documento único, el mejor quehacer de uno de los principales forjadores de Matanzas como ciudad y del desarrollo industrial inicial, alcanzado en el siglo XIX, para la demarcación. El respeto hacia la conservación y el rescate del patrimonio construido en la actual provincia homónima, por sus altísimos valores: histórico, cultural y tecnológico, considera la necesidad del conocimiento ciudadano sobre la actividad del francés Jules Sagebien Tavernier. Desde el añ...

  20. Planeamiento estratégico de la Región Lima Provincias

    OpenAIRE

    Centeno Díaz, Teobaldo Josué; Enríquez Pocomo, Wilder Ever; Rios Marín, Francisco Julio; Villalva Quispe, Carlos Cazeli

    2016-01-01

    xvi, 213 p. : il. ; 30 cm. La presente tesis desarrolla el Plan Estratégico de la Región Lima Provincias, región con un gran potencial por explotar que podría convertirse en eje de desarrollo de la zona centro occidental peruana, los grandes recursos naturales con los que cuenta, su cercanía a la Ciudad de Lima y los Tratados de Libre Comercio (TLC) suscritos por el Perú con otras naciones son grandes oportunidades para insertarla en la economía nacional y mundial. La metodo...

  1. AMBIENTE EMPRESARIAL TRANSFRONTERIZO ENTRE LA PROVINCIA DE HUELVA Y LA REGIÓN DEL ALENTEJO

    OpenAIRE

    Plaza-Mejía, María de los Ángeles; Vargas-Sánchez, Alfonso; Casas Novas, Jorge; Sousa, António

    2010-01-01

    En este estudio se ha analizado la evolución del comercio exterior y se han determinado los sectores en los que se mantienen relaciones comerciales transfronterizas regulares entre la provincia de Huelva y la región del Alentejo, así como las empresas que las llevan a cabo, siendo estas actividades económicas, por tanto, las que ofrecen más posibilidades de una cooperación empresarial efectiva. En este sentido, se identifican toda una serie de elementos ligados a la cooperación, siendo analiz...

  2. Salud y enfermedad en Tunja y su Provincia durante el período colonial

    Directory of Open Access Journals (Sweden)

    Ernesto Porras Collantes

    2000-01-01

    Full Text Available La salud pública es provincia del bienestar social, de la asistencia pública, que las modernas sociedades han integrado a la planificación urbana. Las condiciones físicas del sitio en que Tunja fue fundada, empero, entrabaron la planificación urbana colonial de la urbe y fueron óbice insalvable que conspiró contra su sanidad pública. En efecto, las necesidades tácticas de la guerra de conquista fueron causa determinante para que se fundara a Tunja en un sitio por demás inconveniente para una ciudad, como apropiado para un castro militar.

  3. Salud y enfermedad en tunja y su provincia durante el período colonial

    OpenAIRE

    Porras Collantes, Ernesto

    2010-01-01

    La salud pública es provincia del bienestar social, de la asistencia pública, que las modernas sociedades han integrado a la planificación urbana. Las condiciones físicas del sitio en que Tunja fue fundada, empero, entrabaron la planificación urbana colonial de la urbe y fueron óbice insalvable que conspiró contra su sanidad pública. En efecto, las necesidades tácticas de la guerra de conquista fueron causa determinante para que se fundara a Tunja en un sitio por demás inconveniente para una ...

  4. Diversidad de anfibios anuros del Parque Nacional El Palmar (Provincia de Entre Ríos, Argentina)

    OpenAIRE

    Gangenova, Elena; Guzmán, Atilio; Marangoni, Federico

    2012-01-01

    El Parque Nacional El Palmar (PNEP) es una importante área protegida de la zona este de la provincia de Entre Ríos, Argentina, creado para conservar uno de los últimos fragmentos de palmera yatay (Butia yatay). En este estudio se examina la biodiversidad de la comunidad de anfibios anuros que habitan tres tipos de ambientes del Parque; el pajonal, el pastizal y la selva en galería. Los muestreos se llevaron a cabo entre los meses de primavera-verano de 2008 y 2009. En total se registraron 16 ...

  5. Calidad de vida y problemas bucales en preescolares de la provincia de Huaura, Lima.

    OpenAIRE

    López-Ramos, Roxana Patricia; García-Rupaya, Carmen Rosa

    2014-01-01

    Objetivos: Evaluar el impacto de los problemas bucales en la calidad de vida en niños de 3 a 5 años de la Institución Educativa Inicial del distrito Hualmay de la provincia de Huaura, departamento de Lima en el 2011. Material y Métodos: Este estudio fue de tipo descriptiva, transversal. Evaluó a 153 niños, a quienes se les examinó la cavidad bucal y al responsable del cuidado del niño se aplicó el Early Childhood Oral Health Impact Scale (ECOHIS); previamente se realizó la validación peruana....

  6. Intervención administrativa de los entes descentralizados en la provincia de Corrientes, Argentina

    Directory of Open Access Journals (Sweden)

    Mauricio Goldfarb

    2016-09-01

    Full Text Available La intervención administrativa de los entes descentralizados es una forma de control excepcional sobre las entidades separadas de la administración central. Es una institución regulada constitucional y legalmente como un modo de restablecer el normal funcionamiento de estos entes. En el presente artículo se expone el marco normativo de la intervención y se lo contrasta con la práctica y desarrollo de esta institución en la provincia de Corrientes en los últimos 25 años.

  7. Plan estratégico de la Provincia de Caylloma de la Región de Arequipa

    OpenAIRE

    Calcina Cateriano, Marjorie Agueda; Chávez Rodríguez, Yhordan Jorge; Herrera Escobedo, Fernando Mauricio; Valdivia Abril, Ornela Gricelda

    2016-01-01

    El presente trabajo se ha centrado en la elaboración del plan estratégico de la provincia de Caylloma hacia el año 2026. El objetivo es convertirla en una provincia modelo del país fortaleciendo tres aspectos económicos principales: turismo, producción de quinua y camélidos sudamericanos; enfocado en el desarrollo social y económico de sus pobladores. Para ello, la metodología del estudio ha tomado el modelo estratégico del Dr. Fernando D’Alessio. En cuanto a las referencias, éstas incluyeron...

  8. Management Educativo y Desempeño Docente en la Ugel N° 12 – Provincia de Canta

    OpenAIRE

    Napan Yactayo, Ana Cecilia

    2016-01-01

    El objetivo general de la presente investigación fue: Determinar la relación del management educativo con el desempeño docente en la Ugel 12 de la provincia de Canta. Y la hipótesis: el Management educativo se relaciona significativamente con el desempeño docente de la Ugel N° 12 de la provincia de Canta. El tipo de investigación fue aplicada y nivel explicativo. Se trabajó con un diseño no probabilístico, con una población de 202 docentes, tomando una muestra no probabilíst...

  9. Variability of Soil Types in Wetland Meadows in the South of the Chilean Patagonia Variabilidad de Tipos de Suelos en Las Vegas del Sur de la Patagonia Chilena

    Directory of Open Access Journals (Sweden)

    Ladislava Filipová

    2010-06-01

    Full Text Available The wetland meadows and pastures (vegas of the agricultural zone of the Magallanes Region and the Chilean Patagonia are productive and intensively exploited ecosystems. However, there is scarce data about the typology and the physical and chemical properties of the soils that determine the agricultural potential of vegas sites. Sampling of the main horizons of 47 soil profiles was conducted throughout the area. The profiles were described in the field and consequently classified according to the soil typology system of the WRB (IUSS Working Group WRB, 2006. Analyses of bulk and particle densities, capillary water capacity, pH (H2O, pH (CaCl2, texture, organic material, C:N ratio, electrical conductivity, effective cation exchange capacity, N, P, Ca-Mg-K-Na, exchangeable Al,  extractable Al, sulfur SO4(2-, B, and micronutrients (Cu-Zn-Mn-Fe were carried out.  The most frequently recorded groups of soil types in the studied vegas were Histosols - peat soils (20 profiles, and Fluvisols (19. Gleysols (3, Vertisols (1, Regosols (3, Solonchaks (1 and Solonetzs (1 were detected with much less frequency. There is also considerable variability in soil properties among and within the groups of soil types. The principal differences between the Histosols and the Fluvisols are the content of organic matter (often peat, pH level (related to the absence/presence of carbonates and associated soil properties. Fluvisols are more susceptible to salinization under conditions of aridity, whereas the main threat to Histosols is artificial drainage.Las praderas húmedas (vegas de la zona de uso agropecuario de la Región de Magallanes y la Antártica Chilena son ecosistemas productivos e intensamente explotados. No obstante, los conocimientos de los factores edáficos que determinan el potencial de las vegas son escasos. En este trabajo se realizó el muestreo de los horizontes principales de 47 perfiles del suelo de distintos tipos de vegas de la zona. Los perfiles

  10. Variaciones glaciales durante el Holoceno en Patagonia Central, Aisén, Chile: evidencias geomorfológicas Holocene glacial variations in Central Patagonia, Aisén, Chile: geomorphological evidences

    Directory of Open Access Journals (Sweden)

    María Mardones

    2011-07-01

    Full Text Available Durante el Holoceno, avances y retrocesos glaciares geomorfológicamente registrados caracterizan la Patagonia. Este artículo presenta la evolución geomorfológica y las evidencias de fluctuaciones glaciales holocénicas de una región patagónica, que servirán de referencia para el estudio de la evolución paleoclimática Postglacial del extremo sur de Sudamérica. El área de trabajo es la cuenca del río Blanco (45°30'S, en la Patagonia Central (Región de Aisén, Chile. Dataciones radiométricas de sedimentos orgánicos de morrenas terminales aportan antecedentes preliminares de dos avances glaciares: el primero, representado por la morrena frontal del lago Elizalde, arroja una edad inferior a 9.370±50 años 14C AP (10.700 a 10.480 cal. años AP, lo que cronológicamente ubica este evento glaciar en el Holoceno Temprano. Esta progresión del hielo es 100 a 200 años más antigua que aquella observada inmediatamente al sur del área de estudio, en el margen oriental del lago General Carrera (o lago Buenos Aires en Argentina y aproximadamente 100 años más joven, que la registrada en la morrena de Puerto Banderas I (lago Argentino, 50°S. Este resultado sugiere un patrón de comportamiento de los glaciares de Patagonia Central diferente a aquel observado por otros investigadores en la Región de Los Lagos (41°S y en la Región de Magallanes (54°S, donde no se registran huellas de reavances glaciares durante el Holoceno Temprano. Luego de un importante retroceso hacia el oeste, un reavance glaciar más reciente se habría producido en el valle del río Quetro (afluente del río Blanco, a una edad inferior a 2.250±40 AP (2.340 a 2.150 cal. años AP, comparable con el estadio frío del Neoglacial Medio, verificado en distintos puntos de la Patagonia. Confrontando estos resultados con registros palinológicos previamente publicados por otros autores, interpretamos que las causas de ambas fluctuaciones glaciales son variaciones regionales

  11. Polen y vegetación en la Patagonia extraandina argentina a 45º S

    Directory of Open Access Journals (Sweden)

    Burry, Lidia S.

    2005-12-01

    Full Text Available Modern pollen dispersal and deposition in relation to vegetation and environmental variables at 45° S was studied in Argentinian Patagonia east of the Andes to build a modern pollen model. This model will serve to identify modern pollen assemblages that are analog of past pollen assemblages. A west-to-east gradient of decreasing precipitation and increasing temperature determines four vegetation units: (1 grass steppe, (2 grass-bush steppe, (3 bush steppe and (4 bush-brush steppe. Pollen samples were analyzed by classification and ordination methods, and correlated to environmental variables. The steppes (a dominated by the functional type grass, (1 grass steppe, and (2 grass-bush steppe located in the more humid and cooler west end of the region were separated from the (b bush-dominated steppes (3 bush steppe and (4 bush-brush steppe occurring in the central and eastern parts of the region, where conditions are drier and warmer. Azonal communities were identified as halophytic bush steppes within different vegetation units along the west-east gradient. Environmental variables related to vegetation distribution are temperature and interannual precipitation variability associated with the precipitation gradient from the cordillera to the coast, and soil salinity in the case of azonal communities.Se investigó la relación de la dispersión-deposición del polen actual con la vegetación y con variables ambientales en la Patagonia extraandina argentina a 45° S con el fin de construir un modelo polínico actual. Este modelo servirá para identificar los conjuntos polínicos actuales que sean análogos de conjuntos polínicos fósiles. En la región hay un gradiente decreciente de precipitación y creciente de temperatura de oeste a este, que determina la existencia de diferentes unidades de vegetación: (1 estepa graminosa; (2 estepa graminosa-arbustiva; (3 estepa arbustiva y (4 estepa arbustiva-matorral. Los datos de polen de muestras de suelo

  12. Validating numerical simulations of snow avalanches using dendrochronology: the Cerro Ventana event in Northern Patagonia, Argentina

    Directory of Open Access Journals (Sweden)

    A. Casteller

    2008-05-01

    Full Text Available The damage caused by snow avalanches to property and human lives is underestimated in many regions around the world, especially where this natural hazard remains poorly documented. One such region is the Argentinean Andes, where numerous settlements are threatened almost every winter by large snow avalanches. On 1 September 2002, the largest tragedy in the history of Argentinean mountaineering took place at Cerro Ventana, Northern Patagonia: nine persons were killed and seven others injured by a snow avalanche. In this paper, we combine both numerical modeling and dendrochronological investigations to reconstruct this event. Using information released by local governmental authorities and compiled in the field, the avalanche event was numerically simulated using the avalanche dynamics programs AVAL-1D and RAMMS. Avalanche characteristics, such as extent and date were determined using dendrochronological techniques. Model simulation results were compared with documentary and tree-ring evidences for the 2002 event. Our results show a good agreement between the simulated projection of the avalanche and its reconstructed extent using tree-ring records. Differences between the observed and the simulated avalanche, principally related to the snow height deposition in the run-out zone, are mostly attributed to the low resolution of the digital elevation model used to represent the valley topography. The main contributions of this study are (1 to provide the first calibration of numerical avalanche models for the Patagonian Andes and (2 to highlight the potential of Nothofagus pumilio tree-ring records to reconstruct past snow-avalanche events in time and space. Future research should focus on testing this combined approach in other forested regions of the Andes.

  13. Fluid typing and tortuosity analysis with NMR-DE techniques in volcaniclastic reservoirs, Patagonia/Argentina

    Energy Technology Data Exchange (ETDEWEB)

    Bustos, Ulises Daniel [Schlumberger Argentina S.A., Buenos Aires (Argentina); Breda, Eduardo Walter [Repsol YPF Comodoro Rivadavia, Chubut (Argentina)

    2004-07-01

    Alternative hydrocarbon-detection techniques are used to differentiate water from hydrocarbon where resistivity-based methods are difficult to apply, such as freshwater reservoirs and complex lithologies. One of these areas is represented by the complex volcaniclastic freshwater reservoirs in the Golfo San Jorge basin, Patagonia Argentina, where water and oil have often identical response on conventional logs. Some advances in hydrocarbon identification based on nuclear magnetic resonance (NMR) techniques were achieved in long T1 environments (very light oils, gas) in the Golfo San Jorge basin by previous NMR fluid typing methods. However, since medium to heavy oils are commonly present in these intervals, hydrocarbon detection by such techniques cannot be properly achieved. In addition, restricted diffusion phenomena recognized in these intervals, constitute further complications in fluid typing since its presence have similar response than native oil. To address this problem, a fluid characterization method using NMR Diffusion-Editing techniques and processing/interpretation with D-T2 maps in a suite of NMR measurements was applied. The technique allowed the detection and evaluation of restricted diffusion in these reservoirs, enabling better hydrocarbon characterization in a broad viscosity range (from light to heavy). The method also improved the petrophysical evaluation because restricted diffusion is related to tortuosity in the reservoir. Since the application of this innovative reservoir evaluation method, fluid prognosis vs well completion results was increased from around 68% to around 88% in Golfo San Jorge basin. Moreover, in some of these areas rates above 95% were recently achieved in 2004. (author)

  14. Southern westerly winds: a pacemaker of Holocene glacial fluctuations in Patagonia?

    Science.gov (United States)

    Sagredo, E. A.; Reynhout, S.; Kaplan, M. R.; Patricio, M. I.; Aravena, J. C.; Martini, M. A.; Schaefer, J. M.

    2017-12-01

    A well-resolved glacial chronology is crucial to compare sequences of glacial/climate events within and between regions, and thus, to unravel mechanisms underlying past climate changes. Important efforts have been made towards understanding the Holocene climate evolution of the Southern Andes; however, the timing, patterns and causes of glacial fluctuations during this period still remain elusive. Recent advances in terrestrial cosmogenic nuclide surface exposure dating, together with the establishment of a Patagonian 10Be production rate, have opened new possibilities for establishing high-resolution glacial chronologies at centennial/decadal scale. Here we present a 10Be surface exposure chronology of fluctuations of a small, climate-sensitive mountain glacier at Mt. Fitz Roy area (49.3°S), spanning from the last glacial termination to the present. Thirty new 10Be ages show glacial advances and moraine building events at 17.1±0.9 ka, 13.5±0.5 ka, 10.2±0.7 ka or 9.9±0.5 ka, 6.9±0.2 ka, 6.1±0.3 ka, 4.5±0.2 ka and 0.5±0.1 ka. Similar to the pattern observed in New Zealand, this sequence features progressively less extensive glacial advances during the late-glacial and early Holocene, followed by advances of roughly similar extent during the mid- to late-Holocene. We suggest that while the magnitude of Holocene glacial fluctuations in Patagonia is modulated by SH summer insolation ("modulator"), the specific timing of these glacial events is influenced by centennial-scale shifts of the Southern Westerly Winds ("pacemaker").

  15. Turismo en la Patagonia: Una amenaza para la integridad ecológica del medio natural

    Directory of Open Access Journals (Sweden)

    Luis Inostroza Pino

    2008-01-01

    The tourism in Patagonia is one of the industries of greater growth during the last decade and on which the development of the region of Magallanes is formed. This fever of the nature tourism is articulating to the social group in a deep functional reconversion, the arrival of the tourists grows and the sector is seen with pride by the authorities. Nevertheless one is tourism base on distributed territorial attributes on one of the natural but fragile surroundings of the country , contradiction that originates the present investigation. A comparative analysis between this tourist development sets out and the natural means , a dialectic approach from the landscape ecology by means of the indirect characterization of the ecosystems through their emergent ecological qualities associated to the properties of their fragments ,establishing the space ecological configuration of natural means and comparing it with the intensity of tourist use to that this being put under . The analysis development completely in GIS (Geographic Information System with mathematical fractal witch allows to complement it with other ecological studies of base being generated a powerful tool to orient the protection of our natural patrimony and to articulate it of a sustainable way but with possibly injurious activities. The model allows to establish a pattern of insensible tourist development with the natural means that take control of the last bastions of the ecosystem of Patagonic Andean Forest, excellent ecological areas outside the legal protection of state which shows the urgent necessity of one better territorial management of the preservation and conservation of our special ecological reality.

  16. Detrital zircon geochronology and provenance of the Chubut Group in the northeast of Patagonia, Argentina

    Science.gov (United States)

    Navarro, Edgardo L.; Astini, Ricardo A.; Belousova, Elena; Guler, M. Verónica; Gehrels, George

    2015-11-01

    The Chubut Group constitutes the most widespread sedimentary unit in NE Patagonia, characterized by variable-energy fluvial deposits. U-Pb analysis of detrital zircons from two sections of the Chubut Group constraint the age of the oldest sedimentary rocks in the northeast of the Somuncurá - Cañadón Asfalto Basin. In the Cañadón Williams area, at San Jorge section, 20 km NW of Telsen locality, dating of 56 detrital zircons from a medium to coarse sandstone indicated a maximum depositional age of 109 ± 1 Ma (n = 4). These sandstones were interpreted to represent shallow channels, associated with a lacustrine system. In the Telsen locality, a laser ablation analysis of 115 detrital zircons from a medium to coarse-grained sandstone, from fluvial channel facies, yielded a maximum depositional age of ca. 106 ± 1 Ma (n = 8). Both ages are consistent with volcanic events of the Barremian to Albian age in the central Patagonian Andes Region. Cathodoluminescence images of zircons from the San Jorge sample suggest an igneous origin, which is further supported by Th/U values above 0.5 in most of the grains. The distribution of the statistical modes of the main age populations of detrital zircons for the two samples [182, 185 and 189 Ma for Telsen sample (T2S) and 181 ± 1 Ma for San Jorge sample (SJS)] matches the age of the volcanic Marifil Formation. The rocks of the Marifil Formation of these ages are exposed NE to SE of the study area. The abundance of zircons of similar Jurassic ages (n = 52 for SJS and n = 105 for T2S) and the external morphology of the zircons in the sample SJS, implies a close proximity of the source area. Suggestion that the Marifil Formation was the main provenance source is also supported by northeast-southeasterly paleocurrents measured at the San Jorge and Telsen sections.

  17. A Water Resources Management Model to Evaluate Climate Change Impacts in North-Patagonia, Argentina

    Science.gov (United States)

    Bucciarelli, L. F.; Losano, F. T.; Marizza, M.; Cello, P.; Forni, L.; Young, C. A.; Girardin, L. O.; Nadal, G.; Lallana, F.; Godoy, S.; Vallejos, R.

    2014-12-01

    Most recently developed climate scenarios indicate a potential future increase in water stress in the region of Comahue, located in the North-Patagonia, Argentina. This region covers about 140,000 km2 where the Limay River and the Neuquén River converge into the Negro River, constituting the largest integrated basins in Argentina providing various uses of water resources: a) hydropower generation, contributing 15% of the national electricity market; b) fruit-horticultural products for local markets and export; c) human and industrial water supply; d) mining and oil exploitation, including Vaca Muerta, second world largest reserves of shale gas and fourth world largest reserves of shale-oil. The span of multiple jurisdictions and the convergence of various uses of water resources are a challenge for integrated understanding of economically and politically driven resource use activities on the natural system. The impacts of climate change on the system could lead to water resource conflicts between the different political actors and stakeholders. This paper presents the results of a hydrological simulation of the Limay river and Neuquén river basins using WEAP (Water Evaluation and Planning) considering the operation of artificial reservoirs located downstream at a monthly time step. This study aims to support policy makers via integrated tools for water-energy planning under climate uncertainties, and to facilitate the formulation of water policy-related actions for future water stress adaptation. The value of the integrated resource use model is that it can support local policy makers understand the implications of resource use trade-offs under a changing climate: 1) water availability to meet future growing demand for irrigated areas; 2) water supply for hydropower production; 3) increasing demand of water for mining and extraction of unconventional oil; 4) potential resource use conflicts and impacts on vulnerable populations.

  18. Lake-level variations and tides in Lago Argentino, Patagonia: insights from pressure tide gauge records

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    Andreas Richter

    2015-08-01

    Full Text Available Based on precise pressure tide gauge observations lake-level records are derived for two sites in Lago Argentino, southern Patagonia, of 2.5 and 1 years of duration. Applying the tools of time series analysis, the principal processes affecting the lake level are identified and quantified. Lake-level changes reflecting variations in lake volume are dominated by a seasonal cycle of 1.2 m in amplitude. Lake-volume changes occur in addition with a daily period in response to melt water influx from surrounding glaciers. Sporadic lake-volume jumps are caused by bursting of the ice dam of Perito Moreno glacier. Water movements in Lago Argentino are dominated by surface seiches reaching 20 cm in amplitude. Lake tides reach a maximum amplitude of 3 mm. The comparison of the tidal signal extracted from the lake-level observations with a model composed of the contributions of body tide and ocean tidal loading indicates a phase shift of 23° which is most likely explained by an 1 hour phase lag of global ocean tide models in the region of the highly fragmented Pacific coast. The comparison of the obtained results with those of a previous study of Lago Fagnano, Tierra del Fuego, allows to relate differences in the hydrological and hydrodynamic processes between both lakes to morphological properties. This leads to a tentative prediction of the lake-level variability to be expected from other great Patagonian lakes. The presented geodetic results shall serve as a starting point for a detailed limnological investigation of these aquatic ecosystems.

  19. The early Miocene balaenid Morenocetus parvus from Patagonia (Argentina and the evolution of right whales

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    Mónica R. Buono

    2017-12-01

    Full Text Available Balaenidae (right and bowhead whales are a key group in understanding baleen whale evolution, because they are the oldest surviving lineage of crown Mysticeti, with a fossil record that dates back ∼20 million years. However, this record is mostly Pliocene and younger, with most of the Miocene history of the clade remaining practically unknown. The earliest recognized balaenid is the early Miocene Morenocetus parvus Cabrera, 1926 from Argentina. M. parvus was originally briefly described from two incomplete crania, a mandible and some cervical vertebrae collected from the lower Miocene Gaiman Formation of Patagonia. Since then it has not been revised, thus remaining a frequently cited yet enigmatic fossil cetacean with great potential for shedding light on the early history of crown Mysticeti. Here we provide a detailed morphological description of this taxon and revisit its phylogenetic position. The phylogenetic analysis recovered the middle Miocene Peripolocetus as the earliest diverging balaenid, and Morenocetus as the sister taxon of all other balaenids. The analysis of cranial and periotic morphology of Morenocetus suggest that some of the specialized morphological traits of modern balaenids were acquired by the early Miocene and have remained essentially unchanged up to the present. Throughout balaenid evolution, morphological changes in skull arching and ventral displacement of the orbits appear to be coupled and functionally linked to mitigating a reduction of the field of vision. The body length of Morenocetus and other extinct balaenids was estimated and the evolution of body size in Balaenidae was reconstructed. Optimization of body length on our phylogeny of Balaenidae suggests that the primitive condition was a relatively small body length represented by Morenocetus, and that gigantism has been acquired independently at least twice (in Balaena mysticetus and Eubalaena spp., with the earliest occurrence of this trait in the late

  20. An Unusual New Theropod with a Didactyl Manus from the Upper Cretaceous of Patagonia, Argentina

    Science.gov (United States)

    Apesteguía, Sebastián; Smith, Nathan D.; Juárez Valieri, Rubén; Makovicky, Peter J.

    2016-01-01

    Background Late Cretaceous terrestrial strata of the Neuquén Basin, northern Patagonia, Argentina have yielded a rich fauna of dinosaurs and other vertebrates. The diversity of saurischian dinosaurs is particularly high, especially in the late Cenomanian-early Turonian Huincul Formation, which has yielded specimens of rebacchisaurid and titanosaurian sauropods, and abelisaurid and carcharodontosaurid theropods. Continued sampling is adding to the known vertebrate diversity of this unit. Methodology/ Principal Findings A new, partially articulated mid-sized theropod was found in rocks from the Huincul Formation. It exhibits a unique combination of traits that distinguish it from other known theropods justifying erection of a new taxon, Gualicho shinyae gen. et sp. nov. Gualicho possesses a didactyl manus with the third digit reduced to a metacarpal splint reminiscent of tyrannosaurids, but both phylogenetic and multivariate analyses indicate that didactyly is convergent in these groups. Derived characters of the scapula, femur, and fibula supports the new theropod as the sister taxon of the nearly coeval African theropod Deltadromeus and as a neovenatorid carcharodontosaurian. A number of these features are independently present in ceratosaurs, and Gualicho exhibits an unusual mosaic of ceratosaurian and tetanuran synapomorphies distributed throughout the skeleton. Conclusions/ Significance Gualicho shinyae gen. et sp. nov. increases the known theropod diversity of the Huincul Formation and also represents the first likely neovenatorid from this unit. It is the most basal tetatanuran to exhibit common patterns of digit III reduction that evolved independently in a number of other tetanuran lineages. A close relationship with Deltadromaeus from the Kem Kem beds of Niger adds to the already considerable biogeographic similarity between the Huincul Formation and coeval rock units in North Africa. PMID:27410683

  1. The early Miocene balaenid Morenocetus parvus from Patagonia (Argentina) and the evolution of right whales

    Science.gov (United States)

    Cozzuol, Mario A.; Fitzgerald, Erich M.G.

    2017-01-01

    Balaenidae (right and bowhead whales) are a key group in understanding baleen whale evolution, because they are the oldest surviving lineage of crown Mysticeti, with a fossil record that dates back ∼20 million years. However, this record is mostly Pliocene and younger, with most of the Miocene history of the clade remaining practically unknown. The earliest recognized balaenid is the early Miocene Morenocetus parvus Cabrera, 1926 from Argentina. M. parvus was originally briefly described from two incomplete crania, a mandible and some cervical vertebrae collected from the lower Miocene Gaiman Formation of Patagonia. Since then it has not been revised, thus remaining a frequently cited yet enigmatic fossil cetacean with great potential for shedding light on the early history of crown Mysticeti. Here we provide a detailed morphological description of this taxon and revisit its phylogenetic position. The phylogenetic analysis recovered the middle Miocene Peripolocetus as the earliest diverging balaenid, and Morenocetus as the sister taxon of all other balaenids. The analysis of cranial and periotic morphology of Morenocetus suggest that some of the specialized morphological traits of modern balaenids were acquired by the early Miocene and have remained essentially unchanged up to the present. Throughout balaenid evolution, morphological changes in skull arching and ventral displacement of the orbits appear to be coupled and functionally linked to mitigating a reduction of the field of vision. The body length of Morenocetus and other extinct balaenids was estimated and the evolution of body size in Balaenidae was reconstructed. Optimization of body length on our phylogeny of Balaenidae suggests that the primitive condition was a relatively small body length represented by Morenocetus, and that gigantism has been acquired independently at least twice (in Balaena mysticetus and Eubalaena spp.), with the earliest occurrence of this trait in the late Miocene

  2. Human effects in Holocene fire dynamics of Central Western Patagonia (~44° S, Chile

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    César Méndez

    2016-08-01

    Full Text Available The forest-steppe ecotone of the eastern slope of the Andes in Central Western Patagonia (43°40'-49°15' S, Chile, South America provides a unique area for assessing long and short term dynamics between humans and past environments. Central Western Patagonian was a demographically marginal zone inhabited intermittently and with low intensity by hunter-gatherers during the Holocene. This paper adopts a novel approach in order to assess the relationship between trends in the archaeological, pollen and charcoal records. The recognition of temporal and spatial scales in both archaeology and paleoecology is crucial for defining roles in paleofire records. The main goal of the paper is to assess the role of climate and human beings as potential ignitors of wildfires by acknowledging the scales in which they operate and the different roles either one played in paleofire trends. We investigated a case study in the Cisnes River Valley where the frequencies and magnitudes of fire episodes – reconstructed from macro-charcoal particles from the Lake Shaman intermoraine sequence – can be attributed to human action, while acknowledging the driving role of climate over broader time scales. The Lake Shaman charcoal record spanning the last 19000 cal years is compared to the archaeological record starting at 11500 cal years BP. After comparing paleofires, reconstructed from the charcoal record, with peaks and troughs in the radiocarbon record and archaeological evidence at local and site scales, we argue that this approach provides insights for assessing the timing and magnitude of human effects on the environment. We examine collation and correlation scenarios for comparative trends between the archaeological, pollen and charcoal records. The correlation of occupational events at the El Chueco 1 archaeological site and other sites along the Cisnes River Valley with the results obtained at Lake Shaman is suggestive of a combination of human agency and

  3. Ceratopetalum (Cunoniaceae) fruits of Australasian affinity from the early Eocene Laguna del Hunco flora, Patagonia, Argentina.

    Science.gov (United States)

    Gandolfo, María A; Hermsen, Elizabeth J

    2017-03-01

    Radially symmetrical, five-winged fossil fruits from the highly diverse early Eocene Laguna del Hunco flora of Chubut Province, Patagonia, Argentina, are named, described and illustrated. The main goals are to assess the affinities of the fossils and to place them in an evolutionary, palaeoecological and biogeographic context. Specimens of fossil fruits were collected from the Tufolitas Laguna del Hunco. They were prepared, photographed and compared with similar extant and fossil fruits using published literature. Their structure was also evaluated by comparing them with that of modern Ceratopetalum (Cunoniaceae) fruits through examination of herbarium specimens. The Laguna del Hunco fossil fruits share the diagnostic features that characterize modern and fossil Ceratopetalum (symmetry, number of fruit wings, presence of a conspicuous floral nectary and overall venation pattern). The pattern of the minor wing (sepal) veins observed in the Patagonian fossil fruits is different from that of modern and previously described fossil Ceratopetalum fruits; therefore, a new fossil species is recognized. An apomorphy (absence of petals) suggests that the fossils belong within crown-group Ceratopetalum . The Patagonian fossil fruits are the oldest known record for Ceratopetalum . Because the affinities, provenance and age of the fossils are so well established, this new Ceratopetalum fossil species is an excellent candidate for use as a calibration point in divergence dating studies of the family Cunoniaceae. It represents the only record of Ceratopetalum outside Australasia, and further corroborates the biogeographic connection between the Laguna del Hunco flora and ancient and modern floras of the Australasian region. © The Author 2017. Published by Oxford University Press on behalf of the Annals of Botany Company.

  4. The cephalic lateral line system of temperate perches (Perciformes: Percichthyidae from Argentinean Patagonia

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    Rocío M. Vega

    Full Text Available ABSTRACT The species of Percichthys (Percichthyidae are endemic to southern South America. Some authors have pointed out that the genus includes four valid species, based on the morphology of the head, jaws, and fins. A phylogenetic analysis published by other authors suggests that three of them are morphotypes belonging to the same species, Percichthys trucha (Valenciennes, 1833. The aim of this study is to describe for the first time the morphology of the cephalic seismosensory system of Patagonian perches, and how these characters vary in the three morphotypes, in order to provide morphological elements to analyze the taxonomy of these fish species. Comparisons of the cephalic seismosensory system between juveniles and adults were also conducted. Juvenile and adult specimens were collected in the northwestern Argentinean Patagonia. Specimens were bleached in 5% H2O2 and the canal systems of their cephalic lateral line were filled with hematoxylin. Specimens were deposited in the Museo Argentino de Ciencias Naturales Bernardino Rivadavia, Argentina. The cephalic lateral line of the studied specimens is a widened type of canal systems, is not connected to the trunk lateral line, and consists of preopercular-mandibular canal, infraorbital canal, supraorbital canal, temporal canal, supratemporal canal, and a supraorbital commisure. The number of pores increases during the ontogeny, while their diameters decrease. The number, position and size of infraorbital canal pores showed significant differences among morphotypes and juveniles. The interpopulation variation regarding the number, position, and size of pores seems to signal an ongoing process of speciation, which is the result adaptations to different environmental conditions. Our study contributes to the knowledge of the morphology of percichthids and describes for the first time the seismosensory system of temperate perches.

  5. Modelling Soil Carbon Content in South Patagonia and Evaluating Changes According to Climate, Vegetation, Desertification and Grazing

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    Pablo Luis Peri

    2018-02-01

    Full Text Available In Southern Patagonia, a long-term monitoring network has been established to assess bio-indicators as an early warning of environmental changes due to climate change and human activities. Soil organic carbon (SOC content in rangelands provides a range of important ecosystem services and supports the capacity of the land to sustain plant and animal productivity. The objectives in this study were to model SOC (30 cm stocks at a regional scale using climatic, topographic and vegetation variables, and to establish a baseline that can be used as an indicator of rangeland condition. For modelling, we used a stepwise multiple regression to identify variables that explain SOC variation at the landscape scale. With the SOC model, we obtained a SOC map for the entire Santa Cruz province, where the variables derived from the multiple linear regression models were integrated into a geographic information system (GIS. SOC stock to 30 cm ranged from 1.38 to 32.63 kg C m−2. The fitted model explained 76.4% of SOC variation using as independent variables isothermality, precipitation seasonality and vegetation cover expressed as a normalized difference vegetation index. The SOC map discriminated in three categories (low, medium, high determined patterns among environmental and land use variables. For example, SOC decreased with desertification due to erosion processes. The understanding and mapping of SOC in Patagonia contributes as a bridge across main issues such as climate change, desertification and biodiversity conservation.

  6. Cerro Bombero: registro de Hippidion saldiasi Roth, 1899 (Equidae, Perissodactyla en el Holoceno temprano de Patagonia (Santa Cruz, Argentina

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    Alberdi, M. T.

    2008-06-01

    Full Text Available A new record of Hippidion saldiasi with new radiocarbon data referred to early Holocene (8,850 ± 80 year C-14 B.P of Patagonia is reported. Both its peculiar geographic location in a scarcely prospected zone and its radiocarbon age, provide new elements to discuss the previous hypotheses about the extinction of the horses and its relations with the human beings that inhabited the different environments of South America.Presentamos un nuevo registro de Hippidion saldiasi con datación radiocarbónica directa correspondiente al Holoceno temprano de Patagonia (8.850 ± 80 años C-14 AP. Su particular ubicación temporal y geográfica en una zona poco estudiada hasta ahora y su registro reciente, aportan nuevos elementos para discutir las hipótesis previas sobre la extinción de los caballos y su relación con los grupos humanos que colonizaron los diferentes ambientes de América del Sur.

  7. Decrecimiento y renovadas estrategias para un territorio agotado. El caso de la provincia de Alicante

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    Xavier Amat Montesinos

    2015-01-01

    Full Text Available Las consecuencias del último boom inmobiliario han abierto el debate alrededor del crecimientourbano en España, especialmente en áreas con una fuerte presión turística y residencial. En estetrabajo se analizan algunas de las implicaciones de la crisis financiera mundial sobre la planificaciónurbanística municipal, centrando el estudio en la provincia de Alicante, uno de los ámbitosque mejor ilustran el éxito y la caída del modelo inmobiliario hispano. La unidad básica de análisisla componen las figuras de planeamiento municipal y estrategias territoriales vigentes, y sutraducción en suelos urbanos inconclusos. Considerando que se trata de actuaciones durmientesa la espera de un contexto económico favorable, la situación hace pensar que la burbuja inmobiliariano estaría estallada sino tan sólo desinflada.El objetivo es reflexionar, con carácter propositivo, sobre las estrategias de gestión del territorioque emergen durante los últimos años a raíz de la crisis financiera e inmobiliaria, tratando derelanzar algunas cuestiones que deberían preocupar en la planificación urbanística y territorialde la provincia de Alicante, y por extensión, de otros espacios afectados por el crash inmobiliario.

  8. De beatas y beaterios jesuitas de la provincia del Paraguay, siglos XVII–XVIII

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    Carlos A. Page

    2018-09-01

    Full Text Available En las Constituciones de la Compañía de Jesús se estableció que no se podrían incorporar mujeres a su comunidad. Sin embargo, en todo el mundo se crearon congregaciones femeninas independientes que siguieron las reglas jesuitas. Aquí se dan algunos ejemplos para alcanzar el objetivo del artículo, que es indagar sobre las beatas que fueron destacadas en la documentación de los jesuitas de la provincia del Paraguay; se admiten las dificultades que implica no contar con otras fuentes. De esta manera se dan a conocer algunas mujeres prácticamente desconocidas en la historiografía religiosa y, a su vez, el interés en sus ámbitos, los beaterios, que permiten contribuir al conocimiento del modo de vida espiritual que llevaban. Solo se mencionó uno de éstos en los inventarios de las temporalidades de toda la provincia, por lo que se pretende indagar sobre el origen, la descripción y el destino del edificio.

  9. LA ACTIVIDAD HIDROCARBURÍFERA EN LA PROVINCIA DE NEUQUÉN.

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    Beatriz Saint-Lary

    2000-12-01

    Full Text Available Si se tiene en cuenta que la actividad energética constituye el eje del desarrollo económico de la provincia del Neuquén, que de los tres circuitos que la conforman- hidroeléctrico, del petréleo y del gas- son estos dos últimos los que tiene mayores implicancias en los preceso socioeconómicos regionales y en la configuración territorial neuquina y que, además, a partir de 1990 se han producido transformaciones estructurales que han modificado radicalmente las relaciones de produción, de reproduccion social y de acumulación de capital en los referidos circuitos, es indispensable caracterizar estas actividades para comprender la dinámica socioeconómica y territorial de la provincia y, en especial, de los centros urbanos que nacieron y se desarrollaron como consecuencia de la explotación del petroleo y del gas.

  10. Distribución y Hospederos de pulgas (Siphonaptera en la Provincia de Ayabaca, Piura - 1999

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    Edwar J Pozo

    2005-10-01

    Full Text Available Estudio descriptivo transversal realizado en la provincia de Ayabaca (zona endémica de peste bubónica, departamento de Piura, Perú; con el objetivo de ampliar los conocimientos sobre las especies de pulgas presentes. Fueron colectados 10 152 especimenes de pulgas en 46 localidades pertenecientes a seis distritos de la provincia de Ayabaca (Suyo, Sapillica, Montero, Paimas, Lagunas y Ayabaca, entre los meses de enero a julio de 1999. El muestreo se realizó seleccionando para cada vivienda un mínimo de cinco ropas de cama y cinco cuyes (Cavia porcellus además de la totalidad de los roedores capturados en las viviendas y en el área silvestre. Ocho especies de pulgas fueron identificadas (Pulex irritans, Tiamastus cavicola, Polygenis litargus, Xenopsylla cheopis, Ctenocephalides felis, Craneopsylla minerva, Leptopsylla segnis y Cediopsylla spillmanni de éstas, P. irritans se reportó en todos los distritos muestreados, seguida de X. cheopis y P. litargus, encontradas en cinco de los seis distritos.

  11. Extensive lake sediment coring survey on Sub-Antarctic Indian Ocean Kerguelen Archipelago (French Austral and Antarctic Lands)

    Science.gov (United States)

    Arnaud, Fabien; Fanget, Bernard; Malet, Emmanuel; Poulenard, Jérôme; Støren, Eivind; Leloup, Anouk; Bakke, Jostein; Sabatier, Pierre

    2016-04-01

    Recent paleo-studies revealed climatic southern high latitude climate evolution patterns that are crucial to understand the global climate evolution(1,2). Among others the strength and north-south shifts of westerlies wind appeared to be a key parameter(3). However, virtually no lands are located south of the 45th South parallel between Southern Georgia (60°W) and New Zealand (170°E) precluding the establishment of paleoclimate records of past westerlies dynamics. Located around 50°S and 70°E, lost in the middle of the sub-Antarctic Indian Ocean, Kerguelen archipelago is a major, geomorphologically complex, land-mass that is covered by hundreds lakes of various sizes. It hence offers a unique opportunity to reconstruct past climate and environment dynamics in a region where virtually nothing is known about it, except the remarkable recent reconstructions based on a Lateglacial peatbog sequence(4). During the 2014-2015 austral summer, a French-Norwegian team led the very first extensive lake sediment coring survey on Kerguelen Archipelago under the umbrella of the PALAS program supported by the French Polar Institute (IPEV). Two main areas were investigated: i) the southwest of the mainland, so-called Golfe du Morbihan, where glaciers are currently absent and ii) the northernmost Kerguelen mainland peninsula so-called Loranchet, where cirque glaciers are still present. This double-target strategy aims at reconstructing various independent indirect records of precipitation (glacier advance, flood dynamics) and wind speed (marine spray chemical species, wind-borne terrigenous input) to tackle the Holocene climate variability. Despite particularly harsh climate conditions and difficult logistics matters, we were able to core 6 lake sediment sites: 5 in Golfe du Morbihan and one in Loranchet peninsula. Among them two sequences taken in the 4km-long Lake Armor using a UWITEC re-entry piston coring system by 20 and 100m water-depth (6 and 7m-long, respectively). One

  12. Interannual variations in the zonal asymmetry of the subpolar latitudes total ozone column during the austral spring

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    Eduardo A. Agosta

    2010-06-01

    patrones estadísticamente significativos en geopotencial y vientos zonales asociados a una onda cuasi-estacionaria 1 que abarca la estratósfera inferior. Los cambios en la onda cuasi-estacionaria 1 asociados a las posiciones extremas de mínimo de ozono muestran tener fuentes y sumideros que determinan interacciones transientes entre la troposfera y la estratosfera. Así, estados climáticos distinguibles de la troposfera parecen estar dinámicamente vinculados con el estado de la estratosfera y la capa de ozono. La migración de la vaguada de CTO desde el sur de Sudamérica hacia el este durante la década de 1990 puede estar vinculada a cambios en la variabilidad del Modo Anular del Sur durante la primavera austral.

  13. Nuevos registros de squamata (reptilia para el pleistoceno superior del norte de la provincia de Buenos Aires, Argentina

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    Federico Agnolin

    2011-01-01

    Full Text Available En el presente artículo son reportados ejemplares de diversos taxones de reptiles escamados fósiles procedentes de la base de la Formación Luján (Pleistoceno Superior, en la localidad fosilífera de Merlo, provincia de Buenos Aires, Argentina. Entre los ejemplares registrados se reconoce el primer registro fósil para el género y especie Anops kingii (Amphisbaenidae; asimismo se reporta la presencia de especies indeterminadas de los géneros Homonota (Gekkonidae y Liolaemus (Liolaemidae. La asociación conjunta de estos tres taxones hoy en día no se encuentra representada en el norte de la provincia de Buenos Aires, siendo la región geográficamente más cercana en donde encuentran una superposición en su distribución el Partido de Balcarce, ubicado en el extremo Sureste de la provincia y alejado unos 600 kilómetros al sur de la localidad fosilífera de Merlo. La presencia conjunta de estos tres reptiles se encuentra de acuerdo con la posible existencia de un pulso árido y frío, tal como ha sido propuesto con anterioridad para porción más inferior del Pleistoceno Superior en la provincia de Buenos Aires.

  14. Confirmación de Amphisbaena angustifrons plumbea (Squamata: Amphisbaenidae) en la provincia de San Juan, Argentina

    OpenAIRE

    Acosta, Juan Carlos; Murúa, Fernando; Ortiz, Graciela

    1996-01-01

    Amphisbaena angustifrons plumbea (Gray). República Argentina, provincia de San Juan, Valle del Tulum, departamento Chimbas, Villa Sarmiento (31º 29' S, 69º 30' W) 12 de noviembre de 1995. Un ejemplar adulto, IMCN - UNSJ 102 (Instituto y Museo de Ciencias Naturales, Universidad Nacional de San Juan).

  15. Investigaciones bioarqueológicas en ambientes ecotonales del borde occidental de la provincia de Buenos Aires y sur de la provincia de Santa Fé

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    Ayuso, María P.

    2003-01-01

    Full Text Available A fines de la década del '80, se ha producido en nuestro país un sostenido desarrollo de los estudios bioarqueológicos orientados a obtener información relevante para discutir diversos aspectos del proceso evolutivo y adaptativo de las poblaciones prehistóricas. Los proyectos realizados y aquellos en desarrollo, presentan un marcado énfasis regional y consideran una amplia gama de indicadores biológicos referidos a aspectos tales como las pautas de salud, nutrición, dieta y actividad de poblaciones correspondientes a distintos períodos del Holoceno. En la Región Pampeana, los trabajos bioarqueológicos llevados a cabo hasta el presente, son escasas las consideraciones sobre el sector comprendido por el Borde Occidental de la Provincia de Buenos, e inexistentes en el Sur de la Provincia de Santa Fe. El presente trabajo está orientado a analizar desde una perspectiva Bioarqueológica, la interrelación entre los procesos bioculturales y paleoambientales en distintos ambientes ecotonales de la Pampa Húmeda. Específicamente se halla abocado al análisis comparativo de sectores con características ecológicas diferentes, ya que se trata de áreas de transición, factor que probablemente influyó en la toma de decisiones por parte de los grupos humanos que habitaron la región a través del tiempo. El objetivo general es estudiar la variabilidad en los modos de uso del espacio y adaptación biocultural por parte de los pobladores de ambientes ecotonales pampeanos. La particularidad ambiental del área de estudio y la variedad del registro bioarqueológico, permiten suponer que la información generada de este modo contribuirá a aumentar y complejizar el conocimiento acerca de los procesos que estructuran el registro arqueológico a distintas escalas espaciales y temporales como un paso necesario para la comprensión de la evolución y adaptación de las poblaciones humanas.

  16. Rutas de circulación e intercambio de sal en la provincia de Tunja, segunda mitad del siglo XVI

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    Blanca Ofelia Acuña Rodriguez

    2018-02-01

    Full Text Available A través de este texto se pretende dar a conocer cómo las rutas de circulación de sal en la Provincia de Tunja contribuyeron a configurar un gran espacio económico, que integró a las provincias de Santa Fe, Pamplona y Tunja en el Nuevo Reino de Granada, durante el siglo XVI. Se partió de una reflexión historiográfica relacionada con la circulación y el comercio de la sal, los medios de transporte y las rutas usadas por los indígenas y los españoles; a partir de las cuales se consolidó un espacio económico mediado por la producción y distribución de la sal, que convirtió a la provincia de Tunja en un eje articulador de relaciones entre los sitios productores de sal en la provincia de Santa Fe y los consumidores de las provincias de Tunja y Pamplona. Esta articulación regional facilitó tanto la circulación de productos de distintos pisos térmicos, como la integración de un amplio territorio colonial. Esto debido a que la localización de Tunja como lugar de paso y conexión entre las Provincias de Santafé, Pamplona y los Llanos de San Juan, hizo de esta ciudad y sus términos un atractivo para el asentamiento hispano, a la vez que generó, durante la segunda mitad del siglo XVI, la posibilidad para que se organizaran en toda la Provincia de Tunja, sitios de aposento, venta y reventa de productos importados de España y productos de la tierra, para el sustento y abastecimiento de las necesidades básicas, y de esta forma sacar provecho de las producciones locales como la sal, el hayo, el algodón, las mantas y otros productos.

  17. Peat decomposition records in three pristine ombrotrophic bogs in southern Patagonia

    Directory of Open Access Journals (Sweden)

    T. Broder

    2012-04-01

    Full Text Available Ombrotrophic bogs in southern Patagonia have been examined with regard to paleoclimatic and geochemical research questions but knowledge about organic matter decomposition in these bogs is limited. Therefore, we examined peat humification with depth by Fourier Transformed Infrared (FTIR measurements of solid peat, C/N ratio, and δ13C and δ15N isotope measurements in three bog sites. Peat decomposition generally increased with depth but distinct small scale variation occurred, reflecting fluctuations in factors controlling decomposition. C/N ratios varied mostly between 40 and 120 and were significantly correlated (R2 > 0.55, p < 0.01 with FTIR-derived humification indices. The degree of decomposition was lowest at a site presently dominated by Sphagnum mosses. The peat was most strongly decomposed at the driest site, where currently peat-forming vegetation produced less refractory organic material, possibly due to fertilizing effects of high sea spray deposition. Decomposition of peat was also advanced near ash layers, suggesting a stimulation of decomposition by ash deposition. Values of δ13C were 26.5 ± 2‰ in the peat and partly related to decomposition indices, while δ15N in the peat varied around zero and did not consistently relate to any decomposition index. Concentrations of DOM partly related to C/N ratios, partly to FTIR derived indices. They were not conclusively linked to the decomposition degree of the peat. DOM was enriched in 13C and in 15N relative to the solid phase probably due to multiple microbial modifications and recycling of N in these N-poor environments. In summary, the depth profiles of C/N ratios, δ13C values, and FTIR spectra seemed to reflect changes in environmental conditions affecting decomposition, such as bog wetness, but were dominated by site specific factors, and are further influenced by ash

  18. Silver contamination on abiotic and biotic compartments of Nahuel Huapi National Park lakes, Patagonia, Argentina

    Energy Technology Data Exchange (ETDEWEB)

    Ribeiro Guevara, Sergio; Arribere, Maria; Bubach, Debora; Vigliano, Pablo; Rizzo, Andrea; Alonso, Marcelo; Sanchez, Ricardo

    2005-01-05

    The Ag contents of abiotic and biotic compartments of different lakes of Nahuel Huapi National Park, Patagonia, Argentina were analyzed. The water bodies studied were lakes Nahuel Huapi, Moreno, Escondido, Espejo Chico and Traful, the latter chosen as a reference lake. The Ag concentration profiles of short sediment cores, dated by {sup 210}Pb and {sup 137}Cs techniques, were analyzed, as well as suspended load collected from three sites of lake Nahuel Huapi. The biota studied were the native mussel Diplodon chilensis (digestive gland and total soft tissues pooled samples) and five species of fish, two native and three introduced (liver and muscle pooled samples). Ag contents were determined by Instrumental Neutron Activation Analysis (INAA). The upper layers of the sediment cores sampled in lake Nahuel Huapi were enriched in Ag contents compared to deep layers in accumulation periods corresponding to the second half of the 20th century, but this enrichment was neither observed in the reference lake Traful, nor in lakes Espejo Chico and Escondido. Ag was enriched over background level (0.1 {mu}g g{sup -1}) also in suspended load collected in lake Nahuel Huapi. Ag fluxes to sediments were computed for suspended load and enriched sediment core layers. Highest Ag fluxes, from 350 to 470 {mu}g m{sup -2} year{sup -1}, were measured in Nahuel Huapi near the site where the liquid effluents of the Bariloche city sewage treatment plant are released to the lake. The spatial distribution of the other Ag fluxes suggests that this is the main source of Ag to lake Nahuel Huapi and lateral transport occurs within the water body. Ag concentrations on biota samples were consistent with these conclusions. Mussels collected in lake Nahuel Huapi showed higher Ag concentrations than in the other lakes, especially when compared to lake Traful. Ag contents in mussels were strongly associated with sediment intake, but enriched probably due to sediment grain size sorting during the intake

  19. Silver contamination on abiotic and biotic compartments of Nahuel Huapi National Park lakes, Patagonia, Argentina

    International Nuclear Information System (INIS)

    Ribeiro Guevara, Sergio; Arribere, Maria; Bubach, Debora; Vigliano, Pablo; Rizzo, Andrea; Alonso, Marcelo; Sanchez, Ricardo

    2005-01-01

    The Ag contents of abiotic and biotic compartments of different lakes of Nahuel Huapi National Park, Patagonia, Argentina were analyzed. The water bodies studied were lakes Nahuel Huapi, Moreno, Escondido, Espejo Chico and Traful, the latter chosen as a reference lake. The Ag concentration profiles of short sediment cores, dated by 210 Pb and 137 Cs techniques, were analyzed, as well as suspended load collected from three sites of lake Nahuel Huapi. The biota studied were the native mussel Diplodon chilensis (digestive gland and total soft tissues pooled samples) and five species of fish, two native and three introduced (liver and muscle pooled samples). Ag contents were determined by Instrumental Neutron Activation Analysis (INAA). The upper layers of the sediment cores sampled in lake Nahuel Huapi were enriched in Ag contents compared to deep layers in accumulation periods corresponding to the second half of the 20th century, but this enrichment was neither observed in the reference lake Traful, nor in lakes Espejo Chico and Escondido. Ag was enriched over background level (0.1 μg g -1 ) also in suspended load collected in lake Nahuel Huapi. Ag fluxes to sediments were computed for suspended load and enriched sediment core layers. Highest Ag fluxes, from 350 to 470 μg m -2 year -1 , were measured in Nahuel Huapi near the site where the liquid effluents of the Bariloche city sewage treatment plant are released to the lake. The spatial distribution of the other Ag fluxes suggests that this is the main source of Ag to lake Nahuel Huapi and lateral transport occurs within the water body. Ag concentrations on biota samples were consistent with these conclusions. Mussels collected in lake Nahuel Huapi showed higher Ag concentrations than in the other lakes, especially when compared to lake Traful. Ag contents in mussels were strongly associated with sediment intake, but enriched probably due to sediment grain size sorting during the intake processes. Evidence of food

  20. Ignition probability of fine dead surface fuels in native Patagonia forests of Argentina

    Energy Technology Data Exchange (ETDEWEB)

    Bianchi, L.; Defosse, G. E.

    2014-06-01

    Aim of study: The Canadian Forest Fire Weather Index (FWI) is being implemented all over the world. This index is being adapted to the Argentinean ecosystems since the year 2000. With the objective of calibrating the Fine Fuel Moisture Code (FFMC) of the FWI system to Patagonian forests, we studied the relationship between ignition probability and fine dead surface fuel moisture content (MC) as an indicator of potential fire ignition. Area of study: The study area is located in northwestern Patagonia, Argentina, and comprised two main forest types (cypress and nire) grown under a Mediterranean climate, with a dry summer and precipitations during winter and autumn ({approx}500-800 mm per year). Material and methods: We conducted lab ignition tests fires to determine the threshold of fine dead fuel ignition at different MC levels. Moisture content of dead fine surface fuels in the field was measured every 10-15 days from November to March for three seasons. We calculated the FFMC during these seasons and correlated it with the measured MC by applying a logistic regression model. We combined the results of the ignition tests and of the regressions to suggest FFMC categories for estimating fire danger in Patagonian forests. Main results: The ignition threshold occurred at MC values of 21.5 and 25.0% for cypress and nire sites, respectively. The MC measured varied from 7.3 to 129.6%, and the calculated FFMC varied between 13.4 and 92.6. Highly significant regressions resulted when FFMC was related to MC. The ignition threshold corresponded to a FFMC = 85. We proposed to divide the FFMC scale in three fire danger categories: Low (FFMC {<=} 85), High (85 < FFMC{<=}89) and Extreme (FFMC > 89). Research highlights: Our results provide a useful tool for predicting fire danger in these ecosystems, and are a contribution to the development of the Argentinean Fire Danger Rating and a reference for similar studies in other countries where the FWI is being implemented. (Author)

  1. Geology and Conceptual Model of the Domuyo Geothermal Area, Patagonia, Argentina

    Science.gov (United States)

    Fragoso, A. S.; Ferrari, L.; Norini, G.

    2017-12-01

    Cerro Domuyo is the highest mountain in Patagonia and its western slope is characterized by thermal springs with boiling fluids as well as silicic domes and pyroclastic deposits that suggest the existence of a geothermal reservoir. Early studies proposed that the thermal springs were fault-controlled and the reservoir was located in a graben bounded by E-W normal faults. A recent geochemical study estimated a temperature of 220ºC for the fluid reservoir and a thermal energy release of 1.1 GW, one of the world largest advective heat flux from a continental volcanic center. We carried out a geologic survey and U-Pb and U-Th geochronologic study to elaborate an updated conceptual model for the Domuyo geothermal area. Our study indicates that the Domuyo Volcanic Complex (DVC) is a dome complex overlying an older, Middle Miocene to Pliocene volcanic sequence widely exposed to the southwest and to the north, which in turn covers: 1) the Jurassice-Early Creteacoeus Neuquen marine sedimentary succession, 2) silicic ignimbrites dated at 186.7 Ma and, 3) the Paleozoic metamorphic basement intruded by 288 Ma granite bodies. These pre-Cenozoic successions are involved in dominantly N-S trending folds and thrust faults later displaced by E-W striking normal faults with a right lateral component of motion that underlie the DVC. The volcanic cycle forming the DVC is distinctly bimodal with the emplacement of massive silicic domes but also less voluminous olivine basalts on its southern slope. The central dome underwent a major collapse that produced 0.35 km3 of ash and block flow and associated pyroclastic flows that filled the valley to the southwest up to 30 km from the source. This was followed by a voluminous effusive activity that formed silicic domes dated between 254-322 Ky, which is inferred to overlain a partially molten silicic magma chamber. Integrating the geologic model with magnetotelluric and gravity surveys we developed a conceptual model of the geothermal system

  2. A Combined Observational and Modeling Approach to Study Modern Dust Transport from the Patagonia Desert to East Antarctica

    Science.gov (United States)

    Gasso, S.; Stein, A.; Marino, F.; Castellano, E.; Udisti, R.; Ceratto, J.

    2010-01-01

    The understanding of present atmospheric transport processes from Southern Hemisphere (SH) landmasses to Antarctica can improve the interpretation of stratigraphic data in Antarctic ice cores. In addition, long range transport can deliver key nutrients normally not available to marine ecosystems in the Southern Ocean and may trigger or enhance primary productivity. However, there is a dearth of observational based studies of dust transport in the SH. This work aims to improve current understanding of dust transport in the SH by showing a characterization of two dust events originating in the Patagonia desert (south end of South America). The approach is based on a combined and complementary use of satellite retrievals (detectors MISR, MODIS, GLAS ,POLDER, OMI,), transport model simulation (HYSPLIT) and surface observations near the sources and aerosol measurements in Antarctica (Neumayer and Concordia sites). Satellite imagery and visibility observations confirm dust emission in a stretch of dry lakes along the coast of the Tierra del Fuego (TdF) island (approx.54deg S) and from the shores of the Colihue Huapi lake in Central Patagonia (approx.46deg S) in February 2005. Model simulations initialized by these observations reproduce the timing of an observed increase in dust concentration at the Concordia Station and some of the observed increases in atmospheric aerosol absorption (here used as a dust proxy) in the Neumayer station. The TdF sources were the largest contributors of dust at both sites. The transit times from TdF to the Neumayer and Concordia sites are 6-7 and 9-10 days respectively. Lidar observations and model outputs coincide in placing most of the dust cloud in the boundary layer and suggest significant de- position over the ocean immediately downwind. Boundary layer dust was detected as far as 1800 km from the source and approx.800 km north of the South Georgia Island over the central sub-Antarctic Atlantic Ocean. Although the analysis suggests the

  3. Nacionalismo territorialista en textos escolares: representaciones de la Patagonia en la dictadura militar argentina (1966-1983 Territorialist nationalism in school textbooks: representations of Patagonia in Argentinian military dictatorship (1966-1983

    Directory of Open Access Journals (Sweden)

    Jesús Jaramillo

    2012-03-01

    Full Text Available Los textos escolares desde hace tiempo se han constituido en una de las fuentes primarias para el campo de la Historia de la Educación en tanto son instrumentos de socialización formal básica. Sea considerado registro escrito editorial, herramienta didáctica o registro de memoria escolar, los textos escolares instituyen - y, en ocasiones, eternizan - concepciones e intereses reflejados en sus contenidos "oficiales". Investigaciones recientes en la búsqueda de la realidad escolar han enfatizado la importancia de los mismos en la construcción de las identidades nacionales, pero también de las identidades de grupos socio-culturales, socio-étnicos y regionales. Este artículo, a partir de una indagación historiográfica sobre libros de lectura, intenta reconstruir las diferentes tramas discursivas textuales e iconográficas en que ha sido representada la Patagonia durante los periodos dictatoriales argentinos 1966-1973 y 1976-1983, en escuelas primarias de Río Negro y Neuquén. En principio, puede advertirse un conjunto de relatos de la Patagonia y sus habitantes sobre la base de tres núcleos de sentido: el de territorio indígena, desierto e inculto; el de promisión para el progreso y el turismo; y el de soberanía nacional. A través de sus argumentos daremos cuenta que los libros escolares de edición nacional con rasgos eminentemente políticos pero también étnicos y raciales fueron medios de formación y, sobre todo, dispositivos que coadyuvaron a la conformación de una línea ideológica, política y pedagógica propia del nacionalismo católico militar.School textbooks have long been taken as one of the primary sources for the field of the History of Education, since they are instruments of basic formal socializing. Either as editorial written records, as didactic tools, or as records of school memory, school textbooks institute - and sometimes crystallize - conceptions and interests reflected in their "official" contents

  4. Refugiados y evacuados de la provincia de Toledo al comienzo de la guerra civil (1936

    Directory of Open Access Journals (Sweden)

    Juan Carlos Collado

    2009-01-01

    Full Text Available Desde el comienzo de la guerra civil tuvieron lugar movimientos forzosos de población al compás del avance de los frentes. Como ya sucedió en Andalucía y Extremadura, las sucesivas derrotas del ejército republicano en las comarcas septentrionales de la provincia de Toledo provocaron de nuevo desplazamientos masivos de población con Madrid como destino principal. Empezaba el drama de los refugiados.From the begining of the civil war, forced movements of populations took place witnessing the avance of the army detachments. As it already happened in Andalucia and Extremadura, the successive defeats suffered by the recuplican army in the northern regions of the province of Toledo caused other mass movements of civilians towards Madrid as the main destination. It was just the beggining of the refugees tragedy.

  5. La ineficiencia tributaria en las provincias argentinas: el impuesto sobre los ingresos brutos

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    Dario Alejandro Rossignolo

    2017-01-01

    Full Text Available La organización tributaria federal de la Argentina prevé concurrencia en las fuentes de imposición para la imposición indirecta. En este trabajo se hará referencia al impuesto sobre los Ingresos Brutos, principal fuente de recaudación provincial. En consonancia con el IVA nacional, ambos son tributos generales sobre los consumos, adicionándole al tributo provincial la característica de afectar la producción por ser un tributo en cascada. El propósito es el de intentar identificar si una provincia se encuentra limitada en la recaudación impositiva por una baja capacidad de generar recursos o por un bajo esfuerzo en la explotación de la capacidad tributaria existente para financiar el gasto público.

  6. Mapa de Potencial Eólico de la provincia Holguín

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    Jorge Proenza Velázquez

    2007-01-01

    Full Text Available En este trabajo, se aplican el modelo de microescala WasP 8.2 y el sistema de información geográfica ArcView 3.0 para obtener el mapa de d ensidad de potencia media anual del flujo de energía a 50 m de altura de la provincia Holguín, donde se representan las principales zonas geográficas del territorio con potenciales eólicos óptimos para la utilización del viento en la producción de energía eléctrica mediante la instalación de turbinas eólicas o aerogeneradores.

  7. Trayectoria urbana y sistemas productivos territoriales en la provincia de Córdoba (Argentina

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    Jorge Hernandez

    2015-01-01

    Full Text Available Partiendo de concebir el territorio como un espacio social construido, dinámico y conflictivo, donde coexisten pulsiones modernizantes y herencias del pasado, el artículo intenta comprender la ocupación poblacional del territorio de la provincia de Córdoba (Argentina, las condiciones en que viven y trabajan sus habitantes y las relaciones que se establecen con sus entornos productivos, denominados aquí Sistemas Productivos Territoriales. Se recoge una notable dinámica en el uso poblacional del territorio adaptándose a las diferentes estrategias de desarrollo -conforme a los cambios en la división internacional del trabajo - y a las potencialidades y los límites que imponen las dotaciones de recursos materiales e inmateriales de cada territorio.

  8. LA TRADICIÓN EXPORTADORA DE LAS EMPRESAS HORTOFRUTÍCOLAS DE LA PROVINCIA DE ALICANTE

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    José Daniel Gómez López

    1993-01-01

    Full Text Available La tradición exportadora de la provincia de Alicante en el sector hortofrutícola se remonta al siglo XIX, sin embargo será a partir de la segunda mitad de la presente centuria cuando comenzará a tejerse una verdadera red empresarial especializada en la comercialización de variedades hortícolas. En este sentido, las actividades comerciales, especialmente externas, pasaron a representar uno de los principales ejes sobre el cual tanto empresas asociativas como privadas se apoyarían para integrarse en el mercado hortofrutícola mundial. Se trata de empresas que por regla general tienen una alta capaci- dad de gestión y elevada operatividad, atributos indispensables para poder competir frente a las grandes transnacionales fruteras en el Mercado Único Europeo.

  9. MARCADORES POLÍNICOS EN MIELES DEL NOROESTE DE LA PROVINCIA DE CÓRDOBA, ARGENTINA

    Directory of Open Access Journals (Sweden)

    María C. Costa

    2016-01-01

    Full Text Available Se realizó el estudio melisopalinológico de 49 muestras de miel provenientes del noroeste de la provincia de Córdoba. Prosopis spp., Larrea divaricata , Schinopsis spp., Condalia microphylla , Sarcomphalus mistol , Cercidium praecox , Geoffroea decorticans , Capparis atamisquea , Aloysia gratissima , Mimosa spp. y Schinus spp. fueron los tipos polínicos de mayor importancia y frecuencia de aparición, todos representantes de la flora nativa. Cuatro grupos de mieles se diferenciaron por análisis discriminante: Traslasierra, Perisalina, Chaco Árido y Chaco Serrano; algunas especies permitieron diferenciarlos entre sí: Schinus areira , Maytenus vitis-idaea , Cantinoa mutabilis y Schinopsis spp., respectivamente. Los tipos polínicos con mayor índice de importancia de especie y frecuencia se proponen como marcadores útiles para la Denominación de Origen.

  10. Los puentes de madera de la segunda mitad de s. XIX en la provincia de Guadalajara

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    Asenjo Rodríguez, José E.

    2003-02-01

    Full Text Available To realise this work we have collected information and make different analysis concerning the wood bridges constructed or repaired in the county of Guadalajara in the second part of the XIX century. Our purpose is to recuperate some of the knowledge required to realised that kind of works, today not in use.Este trabajo es el resultado de la recogida y análisis de datos referentes a los puentes de madera que existieron, se repararon o construyeron en la provincia de Guadalajara en la segunda mitad del s. XIX, donde se pretende recuperar algunos de los conocimientos que este tipo de obras, hoy en desuso, requerian para su construcción

  11. ORDENACIÓN SANITARIA EN EL MEDIO RURAL DE LA PROVINCIA DE ALICANTE

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    J. Fermín Bonmatí Antón

    1994-01-01

    Full Text Available En el plano sanitario, la población alicantina residente en los espacios más ruraliza- dos se encuentra en desventaja respecto a los demás habitantes de la provincia. Por un lado, suele coincidir este censo con el de los pacientes con menor accesibilidad a los respectivos centros hospitalarios, hecho que se subsana con la presencia de Consultorios de Asistencia Primaria y Centros de Salud más próximos a las áreas rurales. Por otra parte, se trata de un contingente muy envejecido, con porcentajes muy elevados de población con 60 o más años de edad, circunstancia a tener en cuenta en la planificación y ordenación territorial de los recursos sanitarios.

  12. Origin and evolution of the Laguna Potrok Aike maar (Patagonia, Argentina)

    Science.gov (United States)

    Gebhardt, A. C.; de Batist, M.; Niessen, F.; Anselmetti, F. S.; Ariztegui, D.; Ohlendorf, C.; Zolitschka, B.

    2009-04-01

    Laguna Potrok Aike, a maar lake in southern-most Patagonia, is located at about 110 m a.s.l. in the Pliocene to late Quaternary Pali Aike Volcanic Field (Santa Cruz, southern Patagonia, Argentina) at about 52°S and 70°W, some 20 km north of the Strait of Magellan and approximately 90 km west of the city of Rio Gallegos. The lake is almost circular and bowl-shaped with a 100 m deep, flat plain in its central part and an approximate diameter of 3.5 km. Steep slopes separate the central plain from the lake shoulder at about 35 m water depth. At present, strong winds permanently mix the entire water column. The closed lake basin contains a sub saline water body and has only episodic inflows with the most important episodic tributary situated on the western shore. Discharge is restricted to major snowmelt events. Laguna Potrok Aike is presently located at the boundary between the Southern Hemispheric Westerlies and the Antarctic Polar Front. The sedimentary regime is thus influenced by climatic and hydrologic conditions related to the Antarctic Circumpolar Current, the Southern Hemispheric Westerlies and sporadic outbreaks of Antarctic polar air masses. Previous studies demonstrated that closed lakes in southern South America are sensitive to variations in the evaporation/precipitation ratio and have experienced drastic lake level changes in the past causing for example the desiccation of the 75 m deep Lago Cardiel during the Late Glacial. Multiproxy environmental reconstruction of the last 16 ka documents that Laguna Potrok Aike is highly sensitive to climate change. Based on an Ar/Ar age determination, the phreatomagmatic tephra that is assumed to relate to the Potrok Aike maar eruption was formed around 770 ka. Thus Laguna Potrok Aike sediments contain almost 0.8 million years of climate history spanning several past glacial-interglacial cycles making it a unique archive for non-tropical and non-polar regions of the Southern Hemisphere. In particular, variations of

  13. Mortalidad en la población galesa de Gaiman, provincia de Chubut, Argentina

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    Caratini, Alicia Liliana

    2005-01-01

    Full Text Available El objetivo de este trabajo es analizar la evolución en el tiempo de las defunciones y de las causas de muerte por edad y sexo de la población galesa de Gaiman, provincia de Chubut, Argentina. Los datos fueron obtenidos de las Actas de Defunción del Archivo del Registro Civil de la ciudad de Rawson, Chubut. El período de estudio se extendió de 1892 a 1961 y para su descripción y análisis se lo dividió en decenios. Se registraron 2103 defunciones de las cuales 1039 (49% correspondieron a galeses y sus descendientes, lo cual representa un promedio de 14.6 muertes por año. Se detectó una sobremortalidad masculina (59%, esperable en una población colonizadora con predominio de varones. Se observó un incremento, en el tiempo, de la edad media de defunción, lo que indica mejoras en las condiciones socioeconómicas y de salud de la población. La mortalidad infantil y los natimortos representaron el 20% y el 11%, respectivamente, de las defunciones y se constató una transición desde una mortalidad provocada por enfermedades de naturaleza exógena a otra de causalidad endógena. Al compararse nuestros datos con los de la provincia de Chubut y el país, se comprobó, en todos los casos, un descenso de la mortalidad en el tiempo, aunque en Gaiman esa disminución fue más significativa, probablemente por la atención que la comunidad le dedicaba a la educación y a la salud.

  14. El municipio y la provincia en la Constitución de 1812

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    Javier García Fernández

    2012-01-01

    Full Text Available El modelo local establecido por la Constitución de Cádiz de 1812 comportó un cambio revolucionario que resquebrajó la organización administrativa del Antiguo Régimen, insertando los órganos de gobierno del municipio y de la provincia en la estructura del Estado. La Constitución gaditana alteró la base social y política de España que gravitaba sobre unas entidades locales que estaban liberándose del feudalismo, y reguló profusamente el régimen local. Después de su aprobación, las Cortes Generales y Extraordinarias mostraron gran activismo local desembocado en la Instrucción para el gobierno económico- político de las provincias de 23 de junio de 1813, que se puede considerar la primera Ley de Régimen Local de la España contemporánea. The local model established by the Constitution of Cadiz of 1812 tolerated a revolutionary change that cracked the administrative organization of the Old Regime, inserting the control systems of the municipality and the province in the structure of the State. The Cadiz Constitution altered the social and political base of Spain that weighed on local organizations that were being freed of the feudalism, and regulated the local regime profusely. After their approval, General and Extraordinary Cortes showed great local activism ended at the Instruction for the economic-political government of the provinces of 23 of June of 1813, that can be considered the first Law of Local Regime of contemporary Spain.

  15. Vulnerabilidades frente amenazas naturales en establecimientos de salud de la Provincia de Santa Elena

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    Bertha De Monserrate

    2015-10-01

    Full Text Available Un equipo de análisis de riesgos de la Universidad Estatal Península de Santa Elena y Cooperazione Internationale durante el año 2010, llevó a cabo un estudio de vulnerabilidad de los establecimientos de salud de la provincia de Santa Elena frente a amenazas naturales de tsunami, inundación, erosión y movimiento en masa. El objetivo: evaluar los establecimientos de salud por tipos y nivel de atención, mediante la aplicación de los estándares establecidos en el Manual de Licenciamiento de Ministerio de Salud Pública y diagnosticar el grado de vulnerabilidad de la ubicación geográfica de los establecimientos de salud frente a las amenazas naturales, mediante la superposición de mapas de distribución geográfica y los mapas preliminares de amenazas a desastres naturales de la Secretaria General de Riesgos definida desde las amenazas en base a la guía para implementar el análisis de vulnerabilidades a nivel cantonal de esta secretaría. Resultados: la provincia de Santa Elena cuenta con 75 unidades de salud, 29 pertenecen al Ministerio de Salud Pública y 46 a Organizaciones no gubernamentales, el 75% brindan atención de primer nivel y el 25% segundo nivel básico. El estudio de vulnerabilidad mostró que el hospital de Manglaralto, los subcentros de San Francisco de las Núñez, San Pablo, Monteverde y el dispensario de la Superintendencia de la Libertad califican muy alto, mientras que el resto se considera de alto a medio. El Ministerio de Salud Pública debe reubicar aquellos establecimientos calificados como muy alto y alto.

  16. CONSIDERACIONES PARA LA PLANIFICACIÓN DE RECURSOS HUMANOS EN HOTELES DE LA PROVINCIA DE MANABÍ

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    Rodney Alfonso Alfonso

    2015-10-01

    Full Text Available El objetivo de esta investigación fue realizar consideraciones relacionadas con la actividad de planificación de recursos humanos para las entidades hoteleras de la provincia de Manabí. Se presentó la propuesta de una herramienta para el diagnóstico de la planificación de recursos humanos en entidades hoteleras, que tomó en cuenta la conformación de un equipo de trabajo especializado, una caracterización general del objeto de estudio y de manera específica o detallada del área de recursos humanos. Seguido a esto, se analiza la planificación de recursos humanos, tomando en cuenta factores internos y externos, basándose específicamente en un análisis DAFO ponderado con el criterio de expertos previamente seleccionados y la determinación del estado actual o nivel de desarrollo de la planificación de Recursos Humanos en los hoteles. Los resultados del presente trabajo han sido importantes para la planificación de recursos humanos de forma eficaz y operativa en los hoteles que integran el sistema turístico de Manabí. Además, las entidades hoteleras de la provincia demandan de una gestión de sus recursos humanos con enfoque integral y sistémico, donde es decisivo el papel que desempeña la Planificación de los recursos humanos, con una transformación tanto de métodos como de pensamiento, para emprender acciones en el logro de mejores resultados y no solo el empleo de la experiencia o intuición de los directivos.

  17. Mortalidad por suicidio en la provincia de Pinar del Río

    Directory of Open Access Journals (Sweden)

    Ana Carmen Valdés Vento

    2003-02-01

    Full Text Available Se trata de una investigación descriptiva y retrospectiva sobre el comportamiento de la mortalidad por suicidio en la provincia Pinar del Río durante el año 2001, de acuerdo con una serie de variables seleccionadas. Se estudiaron todos los fallecidos por esa causa en el período señalado, que fueron un total de 110 para una tasa de 14,9 por 100 000 habitantes, por lo que es la séptima causa de muerte en la provincia. Llama la atención el amplio predominio del sexo masculino, de la incidencia en la tercera edad, y el hecho de no haber tenido este año el municipio Sandino fallecido alguno por esta causa, así como que el municipio de mayor número de fallecidos por este motivo fue Viñales con una tasa de 26,0 por 100 000 habitantes.A retrospective descriptive research work on the situation of mortality from suicide in Pinar del Río province during 2001 was carried out based on a group of selected variables. All the deaths form this cause, which amounted to 110 persons for a rate of 14.9 per 100 000 pop, were studied. Suicide was the seventh cause of death in the province. It should be underlined that males prevailed, the incidence of the elderly was high and that Sandino municipality had no death from suicide in this year whereas Viñales municipality showed the highest number of deceased, with a mortality rate of 26 per 100 000 pop.

  18. Inter-subjectivity and Domestication in the Making of a Global Region: Territorialization of Salmon in the Chilean Patagonia

    Directory of Open Access Journals (Sweden)

    Gustavo Blanco Wells

    2016-01-01

    Full Text Available This article examines transformations in the Chilean Patagonia, a region that has become a world leader in Salmon production for global markets. Employing ethnographic methods, this study examines the possibilities of considering inter-subjectivities in the processes of conforming important regions in the global production of foods in contrast to some perspectives that emphasize inter-objectivity in analyzing human and non-human relations. In a complex and globalized world, assembly theory permits us to understand how forms of bio-power stimulate regional transformations that then generate new relationships between life, agency and nature. The analysis focuses on experiments, encounters and affects, decentering conventional perspectives about the domestication of species, regional development and food production. It opens a debate about the potentialities and limits of non-lineal interpretations of reality.

  19. A new species of Ascocotyle (Trematoda: Heterophyidae) from the South American sea lion, Otaria flavescens, off Patagonia, Argentina.

    Science.gov (United States)

    Hernández-Orts, Jesús Servando; Montero, Francisco Esteban; Crespo, Enrique Alberto; García, Néstor Aníbal; Raga, Juan Antonio; Aznar, Francisco Javier

    2012-08-01

    We describe a new heterophyid species, Ascocotyle (Ascocotyle) patagoniensis n. sp., based on specimens collected from the intestines of the South American sea lion Otaria flavescens from Patagonia (Argentina). Ascocotyle (A.) patagoniensis n. sp. is distinguished from the other species of the subgenus by the number of circumoral spines, which are arranged in 2 rows of 18 to 23. The new species also differs from the other species in having a gonotyl without papillae. The specimens exhibited the widest seminal receptacle described for a species of this subgenus. Species of the subgenus Ascocotyle usually infect fish-eating birds or mammals in freshwater or brackish habitats. Ascocotyle (A.) patagoniensis n. sp. is the first species of the subgenus described from a marine mammal. However, no metacercariae of Ascocotyle spp. were found in 542 marine teleosts from 20 species collected in the same locality. The life cycle of the marine species from the Ascocotyle -complex infecting pinnipeds remains elusive.

  20. Compromiso organizacional y satisfacción laboral de los docentes del nivel secundario de las instituciones educativas de la provincia de Canta, Lima, 2014

    OpenAIRE

    Venturo Vara, Rosa Luz; Páez Páez, Fortunata

    2015-01-01

    El presente estudio se centra en describir cómo se relaciona el Compromiso organizacional y satisfacción laboral de los docentes del nivel secundario de las Instituciones Educativas de La Provincia De Canta, Lima, 2014. El nivel de la presente investigación es cuantitativo de tipo descriptivo correlacional. La muestra es probabilística de 111 docentes del nivel secundario de las Instituciones Educativas de la Provincia de Canta Lima. Los instrumentos utilizados para observar...

  1. Is forage productivity of meadows influenced by the afforestation of upstream hillsides? A study in NW Patagonia

    Energy Technology Data Exchange (ETDEWEB)

    Weigandt, M.; Gyenge, J.; Fernandez, M. E.; Varela, S.; Schlichter, T.

    2011-07-01

    Meadows are important reserves of water, with a key role in the maintenance of the biodiversity and productivity of ecosystems. In Patagonia, Argentina, afforestation with fast-growing exotic conifers has slowly but continuously increased over recent decades; though unfortunately, knowledge of the effects of afforestation on water resources remains scarce, with no information at all related to its impact on water dynamics and productivity of meadows located down slope to it. The effects of Pinus ponderosa afforestation on water dynamics (soil moisture contents and groundwater level) and productivity (aboveground forage productivity) of Northwest Patagonia meadows under xeric and humid conditions were analyzed. In the humid meadow, gravimetric soil water content, groundwater level and forage productivity were similar down slope of forested and non-forested slopes, with a trend towards higher forage productivity on the forested slope. In the xeric meadow, gravimetric soil water content was always higher down slope of the non-forested slope, with no difference in groundwater level between treatments. Forage productivity was statistically similar between situations (down slope of forested and non-forested slopes), with a trend towards higher productivity in the zone with higher soil water content. The main difference in the latter was related to differences in soil texture between zones. These results suggest that coniferous plantations located upstream of this type of meadow do not produce a direct effect on its aboveground forage productivity. These systems have high complexity linked to precipitation, geomorphology and previous history of land use, which determine primarily soil water dynamics and consequently, forage productivity. (Author) 42 refs.

  2. A single haplotype hyposensitive to light and requiring strong vernalization dominates Arabidopsis thaliana populations in Patagonia, Argentina.

    Science.gov (United States)

    Kasulin, Luciana; Rowan, Beth A; León, Rolando J C; Schuenemann, Verena J; Weigel, Detlef; Botto, Javier F

    2017-07-01

    The growing collection of sequenced or genotyped Arabidopsis thaliana accessions includes mostly individuals from the native Eurasian and N. African range and introduced North American populations. Here, we describe the genetic and phenotypic diversity, along with habitats and life history, of A. thaliana plants collected at the southernmost end of its worldwide distribution. Seed samples were harvested from plants growing in four sites within a ~3500-km 2 -area in Patagonia, Argentina, and represent the first germplasm to be collected in South America for this species. Whole-genome resequencing revealed that plants from the four sites and a Patagonia herbarium specimen collected in 1967 formed a single haplogroup (Pat), indicating that the phenotypic variation observed in the field reflected plastic responses to the environment. admixture and principal components analyses suggest that the ancestor of the Pat haplogroup either came from Italy or the Balkan/Caucasus regions of Eurasia. In the laboratory, plants from the Pat haplogroup were hyposensitive to continuous red (Rc) and shade light, with corresponding changes in the expression of phytochrome signalling genes. Pat had higher PIF3 and PIF5 and lower HY5 expression under Rc light; and lower expression of PIL1, ATHB2 and HFR1 under shade compared to Col-0. In addition, Pat plants had a strong vernalization requirement associated with high levels of FLC expression. We conclude that including Pat in studies of natural variation and in comparison with other introduced populations will provide additional information for association studies and allow for a more detailed assessment of the demographic events following colonization. © 2017 John Wiley & Sons Ltd.

  3. Spatial distribution, feeding and length–mass relationships of Diamphipnopsis samali (Plecoptera, Diamphipnoidae in a North Patagonia Andean stream, Argentina

    Directory of Open Access Journals (Sweden)

    Guillermo H. OMAD

    2015-01-01

    Full Text Available RESUMEN. Fueron estudiados algunos aspectos de la biología y ecología (patrones de distribución espacial, hábitos alimenticios y relación largo-masa de una población de Diamphipnopsis samali en un arroyo de primer orden que atraviesa un bosque exótico de pino en el centro-norte de Patagonia (Chubut, Argentina. Dos series de muestreos fueron realizados durante períodos de aguas altas y aguas bajas. Toda la información fue tratada con ANOVAS de dos factores y efectos fijos para evaluar diferencias significativas. El análisis de las piezas bucales de D. samali indica que corresponden a un tipo intermedio entre el tipo carnívoro y herbívoro-detritívoro. El contenido estomacal muestra que esta especie se alimenta de hifas fúngicas y madera, aunque en los estadios tempranos se encuentran restos de insectos. No se hallaron diferencias significativas en la alimentación entre períodos de aguas altas y aguas bajas, sin embargo, existieron diferencias significativas entre la dieta de larvas grandes y pequeñas. Fue clara la preferencia por el sustrato tronco y cascada, y también significativamente diferente entre los tipos pozón y corredera. No hubo diferencias significativas en la elección de hábitat entre los períodos de aguas bajas y aguas altas. Esta especie endémica de Patagonia parece estar bien adaptada a la presencia de un bosque ripario exótico, utilizando los troncos caídos como alimento y refugio.

  4. Variation in the proximate composition and fatty acid profile recovered from Argentine hake (Merluccius hubbsi) waste from Patagonia

    Energy Technology Data Exchange (ETDEWEB)

    Cretton, M.; Rost, E.; Mazzuca-Sobczuk, T.; Mazzuca, M.

    2016-07-01

    The fish processing operations in Patagonia produce large amounts of waste. The main fishery resource in Argentina is the Argentine hake (Merluccius hubbsi). The ports of the province of Chubut (the most important of which are Puerto Madryn, Rawson and Comodoro Rivadavia), together with Caleta Paula Port (province of Santa Cruz), in the Argentine Patagonia, capture more than 82,000 tons of hake annualy, 80% of which are of M. hubbsi, which is mostly converted into fillets. From this capture, about 2,296 tons of liver would be available for the extraction of oil. To promote the recovery and industrial use of fish oil, in the present study, we determined the variation in the proximate composition and fatty acid profile of Argentine hake waste from the ports mentioned above at different catch times. Proximate composition was determined according of the Official Methods of Analysis (AOAC). Fatty acid profile was analyzed by gas chromatography of the fatty acid methyl esters (FAMEs). A standard mixture of FAMEs was run under identical conditions to identify the compounds on the basis of their retention times. Fatty acids were quantified using heptadecanoic acid (C17:0) as internal standard. The highest lipid recovery (27.0 to 41.8% of total lipids) was obtained from the liver fraction. Palmitic acid (C16:0), oleic acid (18:1 n9), docosahexaenoic acid (22:6 n3), eicosapentaenoic acid (20:5 n3) and palmitoleic acid (16:1) were the main constituents. Protein levels in viscera without livers (V-L) were higher than those in the liver. The extraction of marine fish oil and the production of fish offal meal from waste from fish factories would contribute to the sustainability of the regional industry, because it would also decrease the volume of waste, with benefits to the environment. (Author)

  5. Soñar con el futuro. Proyectos inmigratorios para la Patagonia argentina en Teodoro Alemann y Roberto J. Payró

    Directory of Open Access Journals (Sweden)

    Jennifer M. Valko

    2014-06-01

    Taking into account recent studies on journalistic travel and Argentine nation building, this article examines the profile of a type of reporter that has been studied to a lesser degree, the immigrant journalist. It analyzes two travel chronicles about Patagonia published in Buenos Aires in 1898: Ein Ausflug nach dem Chubut-Territorium [An Excursion to the Chubut Territory] by Swiss journalist Theodor Alemann, published in the German-language newspaper Argentinisches Tageblatt [Argentine Daily], and La australia argentina, by Roberto J. Payró which appeared in La Nación. In both chronicles the narration of the trip to Patagonia is interrupted at a key moment by the telling of a dream regarding the future of the region. This essay demonstrates that these oneiric digressions reveal political and economic interests contrary to the official Argentine plans for the development of the region, the role of immigrants and their relationship with European powers.

  6. Depositional Environments of Late Danian Plant Localities: Chubut Provice, Patagonia, Argentina

    Science.gov (United States)

    Comer, E.; Slingerland, R. L.; Wilf, P.

    2010-12-01

    Diverse, well-preserved macroflora are observed within Cretaceous and Paleocene sediments of Chubut Province, Patagonia, Argentina. These macroflora are the most well preserved early Paleocene flora from Gondwana and add new insight into the diversity and environments of that epoch. Two major sites of fossil preservation, Palacio de los Loros and Parque Provincial Ormachea, sit near the top of the Late Danian (65.5-61.7 Ma) Salamanca Formation. Understanding the depositional history of the Salamanca is important in characterizing paleoenvironments in which these flora lived and relating these Patagonian macroflora to concurrent Paleocene flora within the Gondwanan supercontinent. During a two week field season, twenty stratigraphic sections were measured along the outcrop belt at Palacio de los Loros and Ormachea Park as well as two minor sites; Las Flores, and Rancho Grande. Photo mosaics, laser ranger data, and stratigraphic columns were merged with elevated geologic maps and imported into Fledermaus to generate a 3-D visualization of facies relationships. Rock samples were also collected and will be thin sectioned and analyzed for petrography and grain size. The Salamanca Fm. consists of 7 facies, listed here in stratigraphically ascending order: 1)Transgressive sands, 2)Wispy-bedded claystone, 3)Banco Verde, 4)White Cross bedded sandstone, 5)Accretion set siltstone, 6)Transitional silty claystone and 7)Banco Negro. Based on these facies, the Salamanca Fm. is interpreted as a marine-shelf to brackish, tide-dominated, estuarine deposit. The base of the Salamanca Fm. rests on an unconformity representing a marine flooding surface and lower sections of the Salamanca, facies 1 and 2, contain abundant glauconite and fossils indicative of a marine shelf environment. These facies give way upwards to bi-directional trough cross bedded sandstones interspersed with flaser bedded sandy siltstones (facies 3 and 4) indicating a less marine estuary with strong flow regimes

  7. Plantas Medicinales en el Parque Nacional los alerces, Chubut, Patagonia Argentina

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    Carolina Toledo

    2012-12-01

    Full Text Available El objetivo de este estudio fue identificar las plantas con valor medicinal empleadas por los antiguos pobladores del Parque Nacional Los Alerces y relacionarlas con la riqueza específica de plantas medicinales presentes en el área. Se entrevistaron 16 pobladores asentados en la Reserva Nacional que tenían conocimiento de las plantas medicinales, más allá de que hicieran uso o no de las mismas. Las entrevistas fueron semiestructuradas, completadas de manera escrita e individual por el entrevistador. Las mismas incluían diez preguntas que recopilaban información respecto a las especies usadas como medicina, modo de preparación y aplicación, frecuencia de uso, localización de las plantas en el ámbito del área protegida, forma de obtención de las especies, y el modo de adquisición de los conocimientos respecto a las plantas. Los pobladores mencionaron el uso de 42 especies con valor medicinal, distribuidas en 24 familias, de las cuales las mejor representadas fueron Lamiaceae (21,4% y Asteraceae (14,2%. En cuanto al origen de las plantas medicinales citadas por los pobladores, el 58, 5% correspondió a especies exóticas. Los usos más frecuentes fueron para trastornos del sistema digestivo, seguido en orden decreciente y en menor proporción para tratar afecciones respiratorias, cardiovasculares y de la piel. Al comparar la riqueza total de especies medicinales presentes en el Parque y las registradas a partir de las entrevistas, se observa que se hace uso de un 28,6% de lo disponible en el área.Medicinal plants in The Alerces National Park, Chubut, Argentinean Patagonia. The aim of this study was to identify the medicinal plants used by the old residents in The Alerces National Park and to relate this information with medicinal species richness in the area. An interview was employed with 16 local people settled in the National Reserve who had knowledge of medicinal plants, past or not to make use of them. The interviews were semi

  8. Pasado y presente del uso de plantas silvestres con órganos subterráneos de almacenamiento comestibles en la Patagonia

    Directory of Open Access Journals (Sweden)

    Juan J. Ochoa

    2011-07-01

    Full Text Available El presente trabajo es la primara aproximación acerca del papel de las plantas con órganos de almacenamiento subterráneos comestibles (POAS en la Patagonia, desde una perspectiva temporal y espacial, al integrar datos etnohistóricos y etnográficos actuales ligados al uso de las POAS. El 75 % de las 54 fuentes analizadas mencionan el uso de POAS en la alimentación humana de la Patagonia. Las POAS silvestres comestibles registradas ascienden a 51 especies, siendo mayor el conjunto de POAS con raíces comestibles. La estepa y zonas ecotonales resultaron las de mayor riqueza de POAS, probablemente vinculado a adaptaciones ecológicas de éstas a la aridez en el primer caso, como a la alta diversidad relativa que presentan los ecotonos, en el segundo. El registro etnohistórico mostró discontinuidades marcadas, siendo pocas las especies presentes por más de un siglo, destacándose la continuidad documental de A. tuberosa desde el siglo XVIII al presente, así como la incorporación reciente de especies exóticas. Las fuentes etnohistóricas revisadas y su contraste con datos etnobotánicos recientes de campo sugieren dinamismo en los patrones de utilización, que a lo largo del tiempo han llevado al abandono del uso de las POAS en la práctica alimentaria de la Patagonia. Las singularidades encontradas respecto a lo temporal y espacial pueden vincularse tanto a los conocimientos locales y específicos desarrollados a lo largo del tiempo por los habitantes de la Patagonia, como también a las circunstancias sociopolíticas y académicas de cada una de las fuentes analizadas.

  9. APOROCOTYLE MARIACHRISTINAE N. SP., AND A. YMAKARA VILLALBA & FERNANDEZ, 1986 (DIGENEA: APOROCOTYLIDAE) OF THE PINK CUSK-EEL, GENYPTERUS BLACODES (OPHIDIIFORMES: OPHIDIIDAE) FROM PATAGONIA, ARGENTINA

    Czech Academy of Sciences Publication Activity Database

    Hernandez-Orts, J.S.; Alama-Bermejo, Gema; Carillo, J.M.; García, N.A.; Crespo, E.A.; Raga, J. A.; Montero, E. E.

    2012-01-01

    Roč. 19, č. 4 (2012), s. 319-330 ISSN 1252-607X R&D Projects: GA ČR GBP505/12/G112 Institutional support: RVO:60077344 Keywords : Aporocotylidae * Aporocotyle * A. mariachristinae n. sp. * A. ymakara * Genypterus blacodes * Ophidiidae * Patagonia * Argentina * rDNA sequences Subject RIV: EB - Genetics ; Molecular Biology Impact factor: 1.116, year: 2012

  10. Unravelling the collapse mechanisms at a Jurassic caldera of the Chon Aike silicic LIP in Southern Patagonia (47 deg. 15 'S, 71 deg. 40'W), Argentina

    International Nuclear Information System (INIS)

    Sruoga, P; Japas, S; Salani, F; Kleiman, L; Graffigna, M

    2008-01-01

    La Peligrosa Caldera is located at Sierra Colorada (47 0 15'S, 71 0 40' W) in the Chon-Aike silicic LIP. It represents an unique window to understand the eruptive mechanisms that prevailed throughout the ignimbritic flare-up in Southern Patagonia during middle to late Jurassic times. Key pieces of lithologic and structural evidences are taken into account to reconstruct the volcanic structure.

  11. Unravelling the collapse mechanisms at a Jurassic caldera of the Chon Aike silicic LIP in Southern Patagonia (47° 15 'S, 71° 40'W), Argentina

    Science.gov (United States)

    Sruoga, P.; Japas, S.; Salani, F.; Kleiman, L.; Graffigna, M.

    2008-10-01

    La Peligrosa Caldera is located at Sierra Colorada (47° 15'S, 71° 40' W) in the Chon-Aike silicic LIP. It represents an unique window to understand the eruptive mechanisms that prevailed throughout the ignimbritic flare-up in Southern Patagonia during middle to late Jurassic times. Key pieces of lithologic and structural evidences are taken into account to reconstruct the volcanic structure.

  12. LA DINÁMICA DE LA POBLACIÓN EN LA PROVINCIA DE ALICANTE DURANTE LA GUERRA CIVIL

    Directory of Open Access Journals (Sweden)

    Vicente Gozálvez Pérez

    1993-01-01

    Full Text Available Durante la guerra civil española de 1936-39, la provincia de Alicante, pese a su situación de retaguardia, tuvo un movimiento natural con graves dificultades, sobre todo en 1939, a resultas del clima de inseguridad y las dificultades económicas creadas por el conflicto; el fuerte aumento de la mortalidad infantil entre 1937 y 1941, así como la sobremortalidad acumulada durante 1936-41, subrayan la fortísima incidencia del con- flicto. La migración neta, negativa para la provincia entre 1888 y 1930, fue muy positiva en 1931-40, debido, entre otras causas, a los desplazamientos provocados por la guerra, especialmente significativos para la ciudad de Alicante.

  13. Coleópteros acuáticos de lagunas situadas en el noroeste de la provincia de Corrientes, Argentina

    Directory of Open Access Journals (Sweden)

    María C. GOMEZ LUTZ

    2012-01-01

    Full Text Available El objetivo de este estudio es contribuir al conocimiento de la biodiversidad de coleópteros acuáticos del NE argentino. Los sitios de muestreo corresponden a dos lagunas permanentes ubicadas en el departamento Capital de la provincia de Corrientes, Argentina. Los muestreos fueron realizados desde octubre de 2010 a marzo de 2011. En total, 107 especies de coleópteros, incluidas en 40 géneros y ocho familias fueron registradas: Haliplidae, Dytiscidae, Noteridae, Dryopidae, Hydrochidae, Hydrophilidae, Limnichidae y Scirtidae. La especie Berosus hamatus Knisch es un nuevo registro para la Argentina. Dos familias (Haliplidae y Dryopidae, cuatro géneros (Haliplus Latreille; Pelonomus Erichson, Onopelmus Spangler, Phaenonotum Sharp y 14 especies son citados por primera vez para la provincia de Corrientes.

  14. Red de la Ciencia: Análisis e Impacto en la Provincia de Sancti Spíritus.

    Directory of Open Access Journals (Sweden)

    María Ofelia Guardiola Fernández

    2009-12-01

    Full Text Available En el presente trabajo se abordan aspectos importantes como el Acceso Abierto a la Información así como la Propiedad Intelectual. Dos aspectos a consideración de las autoras que pueden repercutir positivamente en el desarrollo y divulgación del quehacer científico de la Provincia. Se pone a disposición de los lectores un ejemplo palpable de una de las vías para llegar al Acceso Abierto: Red de la Ciencia. Se hace un análisis desde que comienza en la Provincia el Proyecto llevado a cabo por el IDICT; período comprendido entre 2006 y junio del 2009. Se menciona el impacto que este proyecto ha tenido en el territorio.

  15. Stenocercus doellojuradoi (Iguanidae, Liolaeminae): una nueva especie para la provincia de San Juan, Argentina

    OpenAIRE

    Laspiur, Alejandro; Acosta, Juan Carlos

    2006-01-01

    República Argentina, Provincia de San Juan, Depto. Valle Fértil, 3 km al norte de la localidad de Las Tumanas sobre la Ruta Provincial 510 (30°52’ S, 67°20’ W). COLECTOR: Alejandro Laspiur. FECHA: 25 /02/ 2006. MATERIAL DE REFERENCIA: Instituto y Museo de Ciencias Naturales, Universidad Nacional de San Juan: IMCNUNSJ 3000. Un ejemplar macho (LHC: 54 mm.).

  16. Nueva localidad para Tupinambis rufescens (Günther, 1871 en la provincia de Córdoba (Argentina

    Directory of Open Access Journals (Sweden)

    Haro, J. G.

    2000-05-01

    Full Text Available REP. ARGENTINA. PROVINCIA DE CÓRDOBA. 29 Jun. 1997. 08:30 hs. Depto. Río Primero, Piquillín, 31° 22' S, 63° 35' W. 1 individuo adulto. Longitud total 1220 mm. Longitud hocico - cloaca 460 mm. Cátedra de Diversidad Animal II (CDA: 0319. Colectores: J. G. Haro, J. D. Sferco y U. Arcando.

  17. Reconstructing streamflow variation of the Baker River from tree-rings in Northern Patagonia since 1765

    Science.gov (United States)

    Lara, Antonio; Bahamondez, Alejandra; González-Reyes, Alvaro; Muñoz, Ariel A.; Cuq, Emilio; Ruiz-Gómez, Carolina

    2015-10-01

    The understanding of the long-term variation of large rivers streamflow with a high economic and social relevance is necessary in order to improve the planning and management of water resources in different regions of the world. The Baker River has the highest mean discharge of those draining both slopes of the Andes South of 20°S and it is among the six rivers with the highest mean streamflow in the Pacific domain of South America (1100 m3 s-1 at its outlet). It drains an international basin of 29,000 km2 shared by Chile and Argentina and has a high ecologic and economic value including conservation, tourism, recreational fishing, and projected hydropower. This study reconstructs the austral summer - early fall (January-April) streamflow for the Baker River from Nothofagus pumilio tree-rings for the period 1765-2004. Summer streamflow represents 45.2% of the annual discharge. The regression model for the period (1961-2004) explains 54% of the variance of the Baker River streamflow (R2adj = 0.54). The most significant temporal pattern in the record is the sustained decline since the 1980s (τ = -0.633, p = 1.0144 ∗ 10-5 for the 1985-2004 period), which is unprecedented since 1765. The Correlation of the Baker streamflow with the November-April observed Southern Annular Mode (SAM) is significant (1961-2004, r = -0.55, p < 0.001). The Baker record is also correlated with the available SAM tree-ring reconstruction based on other species when both series are filtered with a 25-year spline and detrended (1765-2004, r = -0.41, p < 0.01), emphasizing SAM as the main climatic forcing of the Baker streamflow. Three of the five summers with the highest streamflow in the entire reconstructed record occurred after the 1950s (1977, 1958 and 1959). The causes of this high streamflow events are not yet clear and cannot be associated with the reported recent increase in the frequency of glacial-lake outburst floods (GLOFs). The decreasing trend in the observed and reconstructed

  18. Il rifornimento della rete commerciale al dettaglio della Provincia di Napoli

    Directory of Open Access Journals (Sweden)

    Marino de Luca

    2010-07-01

    Full Text Available Nella nota vengono sintetizzate le principali conclusioni cui è pervenuta una ricerca finanziata dalla Camera di Commercio di Napoli e realizzata da Uniontrasporti e dal dipartimento di Ingegneria dei trasporti della Federico II. Il lavoro ha riguardato il settore prevalente della city logistics e cioè il rifornimento di quegli esercizi della rete commerciale al dettaglio che non dispongono di organizzazioni autonome già oggi sotto controllo come, ad esempio, hanno la Grande distribuzione, il trasporto dei giornali, dei prodotti farmaceutici, degli ortofrutticoli ecc. Il lavoro è stato caratterizzato da alcune specificità: • è basato su una conoscenza quantitativa diretta della domanda di rifornimento merci nell’area metropolitana di Napoli ottenuta da una rilevazione campionaria sul campo (2000 interviste • si riferisce ad un’area metropolitana e non ad una singola città, prevedendo che una diversa organizzazione del rifornimento deve riguardare tutti gli esercizi del territorio sul quale operano le aziende del settore, territorio che, per le grandi città, coincide con l’area metropolitana • prevede la realizzazione di due tipologie di “nodi” nei quali effettuare manipolazione delle merci: centri merci inseriti negli interporti dell’area per i flussi provenienti o destinati in zone molto distanti (Italia del centro, del nord e del sud e transit point “di quartiere” dai quali partire per raggiungere il destinatario finale con mezzi a mano o ad emissione zero o anche con ritiro a cura del destinatario stesso. Le principali dimensioni della domanda desunte dall’indagine eseguita possono essere sintetizzate nelle seguenti cifre: 27.000 consegne/giorno-medio (0,87 per esercizio per 260.000 colli (9,72 a consegna su tutto il territorio della provincia; il 44% destinate alla città di Napoli, il 45% destinato al resto dell’area metropolitana di Napoli e l’11% al resto della provincia; il 34% proviene invece da

  19. Paleoecología: el uso de los quironómidos fósiles (Diptera: Chironomidae en reconstrucciones paleoambientales durante el Cuaternario en la Patagonia Paleoecology: the use of fossil chironomids (Diptera: Chironomidae for paleoenvironmental reconstructions in Patagonia

    Directory of Open Access Journals (Sweden)

    Julieta Massaferro

    2009-06-01

    Full Text Available Entre los indicadores biológicos lacustres más utilizados en las reconstrucciones ambientales, se encuentran el polen, los ostrácodos y las diatomeas, y entre los insectos, los coleópteros y los quironómidos. Este grupo ha cobrado gran importancia en los últimos tiempos, debido a los resultados prometedores que se han obtenido en reconstrucciones climáticas realizadas en América del Norte y Europa. En América del Sur, el uso de los quironómidos fósiles en estudios cuaternarios es relativamente limitado, principalmente por su escaso conocimiento taxonómico regional. La mayor parte de estos estudios fueron realizados en lagos glaciares patagónicos de Argentina y Chile. Las larvas de quironómidos constituyen una valiosa herramienta paleolimnológica, por ser un grupo de organismos altamente sensible a cambios ambientales, tanto naturales como artificiales. Además, es un grupo de insectos ampliamente distribuido y con una abundancia y diversidad relativamente altas. Sus cápsulas cefálicas se preservan en los sedimentos lacustres y poseen caracteres importantes que permiten identificar géneros y muchas veces especies. El estudio de los ensambles de quironómidos en sedimentos lacustres puede ser utilizado con distintos objetivos, por ejemplo, para estudios de eutrofización, ya que responden rápidamente a cambios en la concentración de nutrientes, materia orgánica y otros elementos, como metales pesados. No obstante, uno de los potenciales más importantes de este grupo de insectos es su sensibilidad a los cambios de temperatura, por este motivo, la aplicación más importante de su estudio en sedimentos se centra en las reconstrucciones climáticas. Esta contribución es una síntesis de los resultados de los trabajos publicados en la Patagonia argentina y chilena, sobre la base del uso de los quironómidos fósiles en reconstrucciones paleoambientales.Pollen, ostracods, diatoms and insects such as beetles and chironomids are

  20. Role of the Angola Low in modulating southern African austral summer rainfall and relationships with synoptic and interannual modes of variability

    Science.gov (United States)

    Crétat, Julien; Pohl, Benjamin; Dieppois, Bastien

    2017-04-01

    The Angola Low has been suggested in many previous studies to be an important regional feature governing southern African rainfall variability during austral summer, which is, in particular, expressed through modulations of El Niño Southern Oscillation (ENSO) impacts on rainfall at the interannual timescale. Here, we analyse a variety of state-of-the-art reanalyses (NCEP2, ERA-Interim and MERRA2) and rainfall data (in situ rain-gauges and satellite-derived products) for: i) identifying the recurrent regimes of the Angola Low (position and intensity) at the daily timescale; ii) diagnosing how they modulate the spatio-temporal variability of austral summer rainfall; and iii) examining their relationships with synoptic convective regimes and ENSO, both at the interannual timescale. The recurrent regimes of the Angola Low are identified over the 1980-2015 period by applying a cluster analysis to daily 700-hPa wind vorticity anomalies over the Angola sector from November to March. The exact number and morphological properties of vorticity regimes vary significantly among the reanalyses, in particular when using the lowest spatial resolution reanalysis (i.e., NCEP2) that leads to detect less diversity, smoothest patterns and weakest intensity across the recurrent regimes. Despite such uncertainties, the regimes describing active Angola Low are quite robust among the reanalyses. Three preferential locations (locked over eastern Angola, shifted few degrees eastward or south-westward), which significantly impact on the rainfall spatial distribution over tropical and subtropical southern Africa, are identified. Independently from its location, Angola Low favours moisture advection from the southwest Indian Ocean and reduces moisture export towards the southeast Atlantic, hence contributing to increase moisture convergence over the subcontinent. Lead/lag correlations with synoptic convective regimes suggest that Angola Low may be a local precursor of tropical

  1. EVALUACIÓN PSICOSOCIAL DEL ADULTO MAYOR EN LA PROVINCIA DE SANTA ELENA. 2013

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    Jenny Sornoza

    2016-04-01

    Full Text Available Los adultos mayores constituyen un grupo poblacional significativo, que por tiempos ha estado desatendido, a pesar de que en el año 1990 se dicta la Ley del Anciano aún las personas mencionadas no gozan de todos los beneficios que contiene dicha ley ya que hasta la actualidad dicha ley no se aplica en su totalidad por falta de socialización, desconocimiento de sus beneficios e implementación de los espacios adecuados entre otras limitantes. El objetivo de la investigación fue el de Realizar una evaluación psicológica y social a los adultos mayores de la provincia en mención, tomando como muestras a las diferentes agrupaciones existentes en varias comunidades y cantones, para crear un modelo de evaluación integral para la optimización de la atención primaria de la salud geriátrica en la Provincia de Santa Elena, al igual que se pretende diseñar propuestas de trabajo que mejoren su condición de vida, puesto que es un sector generalmente abandonado y vulnerable con fácil tendencia a la depresión ; en este estudio participan docentes y estudiantes de la carrera de psicología, y el apoyo coordinado del Ministerio de Inclusión Económica y Social con sus organizaciones y agrupaciones quienes se constituyeron en población y muestra; se aplicó métodos cuantitativo y cualitativo para la evaluación el aspecto psicológico, funciones mentales, entorno familiar y social con la aplicación de los siguientes instrumentos: Mini Mental, Test de Funcionamiento Familiar, ficha social, test de autoestima, ansiedad y depresión, los mismos que nos permitieron comprender cada una de las áreas mencionadas para tener una mirada del contexto general de la población investigada. Entre los hallazgos más relevantes tenemos síntomas de depresión, sentimientos de inutilidad y expectativas de encontrar espacios en los que puedan sentirse productivos y a la vez ocupar su tiempo; así mismo soledad, percepción de abandono familiar entre otros.

  2. Problemas de trazado de las vías romanas en la provincia de La Rioja

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    Enrique ARIÑO GIL

    2009-11-01

    Full Text Available RESUMEN: La provincia de La Rioja fue atravesada en época romana por la gran vía que establecía el contacto entre Tarraco (Tarragona, capital de la provincia romana, y las regiones menos romanizadas del noroeste de la Península Ibérica. Esta vía nos es descrita por el Itinerario de Antonino en dirección Este-Oeste con el nombre De Italia in Hispanias, pero también en sentido inverso con la denominación de Ab Asturica Terracone. Hay que destacar que, en algunos de sus tramos, el Itinerario hace una enumeración diferente de mansiones, siendo éste precisamente el caso del tramo que atravesaba las tierras riojanas. Las fuentes arqueológicas y epigráficas permiten la identificación de un único camino principal sobre el que se asientan las mansiones, si bien pueden reconocerse igualmente otros caminos secundarios, especialmente en la zona de La Rioja Alta, donde la vía principal se aleja de la orilla del Ebro, lo cual hace que se desarrolle al menos una segunda vía paralela.RÉSUMÉ: La actuel province de La Rioja est traversée par le voie que assurait la relation entre Tarraco (Tarragona, capital de la province romaine, et les régions moins romanisées du nord-ouest de la Péninsule Ibérique. Cette voie est décrite par l'Itinéraire d'Antonin en direction Est-Ouest avec la dénomination De Italia in Hispanias, mais aussi en sens inverse, Ouest-Est, avec la dénomination Ab Asturica Terracone. Il faut remarquer que, dans certains tronçons, notre source, fait une différente enumeration de mansiones. Ce problème a été possé à propos de la province que nous étudions. Les sources archéologiques et epigraphiques permettent la restitution du tracé d'un seul chemin romain principal, mais on peut aussi reconnaître des autres chemins secondaires, spécialement dans la région de La Rioja Alta, où les mansiones sont éloignées de les rives de l'Ebre et le fleuve entraîne une autre voie parallèle.

  3. A 17-year Record of Meteorological Observations Across the Gran Campo Nevado Ice Cap in Southern Patagonia, Chile, Related to Synoptic Weather Types and Climate Modes

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    Stephanie S. Weidemann

    2018-05-01

    Full Text Available The network of long-term meteorological observations in Southernmost Patagonia is still sparse but crucial to improve our understanding of climatic variability, in particular in the more elevated and partially glaciated Southernmost Andes. Here we present a unique 17-year meteorological record (2000–2016 of four automatic weather stations (AWS across the Gran Campo Nevado Ice Cap (53°S in the Southernmost Andes (Chile and the conventional weather station Jorge Schythe of the Instituto de la Patagonia in Punta Arenas for comparison. We revisit the relationship between in situ observations and large-scale climate models as well as mesoscale weather patterns. For this purpose, a 37-year record of ERA Interim Reanalysis data has been used to compute a weather type classification based on a hierarchical correlation-based leader algorithm. The orographic perturbation on the predominantly westerly airflow determines the hydroclimatic response across the mountain range, leading to significant west-east gradients of precipitation, air temperature and humidity. Annual precipitation sums heavily drop within only tens of kilometers from ~7,500 mm a−1 to less than 800 mm a−1. The occurrence of high precipitation events of up to 620 mm in 5 days and wet spells of up to 61 consecutive days underscore the year-around wet conditions in the Southernmost Andes. Given the strong link between large-scale circulation and orographically controlled precipitation, the synoptic-scale weather conditions largely determine the precipitation and temperature variability on all time scales. Major synoptic weather types with distinct low-pressure cells in the Weddell Sea or Bellingshausen Sea, causing a prevailing southwesterly, northwesterly or westerly airflow, determine the weather conditions in Southernmost Patagonia during 68% of the year. At Gran Campo Nevado, more than 80% of extreme precipitation events occur during the persistence of these weather types. The

  4. Estudio de los niveles de plomo, cadmio, zinc y arsénico, en aguas de la provincia de Salamanca

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    Blanco Hernández Angel Luis

    1998-01-01

    Full Text Available FUNDAMENTOS: Conocer el grado de contaminación por plomo, cadmio, cinc y arsénico de las aguas de la provincia de Salamanca y su relación con la zona de procedencia de las muestras y el punto de recogida de las mismas. MÉTODO: Estudio epidemiológico transversal, observacional y descriptivo. Se han estudiado aguas procedentes de redes de abastecimiento, fuentes, manantiales, pozos, ríos, riveras y lagunas de la provincia de Salamanca, analizándose los contenidos de plomo, cadmio, zinc y arsénico de 180 muestras, mediante espectroscopía de absorción atómica. Se han comparado los niveles de contaminación por los cuatro elementos de las muestras de agua entre las cuatro unidades comarcales de la provincia. Se han comparado los niveles de contaminación por los cuatro elementos entre las aguas procedentes de redes de abastecimiento y aquellas muestras de pozos, fuentes, manantiales y aguas de superficie. RESULTADOS: Los resultados indican que un 56% de las muestras analizadas superan las concentraciones máximas admisibles de cadmio, y un 28% del total de muestras analizadas supera las concentraciones máximas admisibles de plomo, según la legislación vigente presentando niveles tolerables de zinc y arsénico. No se han observado diferencias importantes en el grado de contaminación de las aguas por los elementos estudiados entre las cuatro unidades comarcales de la provincia. No se han observado diferencias en los niveles de contaminación por los cuatro elementos entre las aguas procedentes de redes de abastecimientos y aquellas muestras de pozos, fuentes, manantiales y aguas de superficie. CONCLUSIONES: Los resultados sugieren que las aguas de la provincia de Salamanca presentan de forma "natural" altos contenidos de cadmio y plomo, probablemente debido a las características geológicas del terreno.

  5. Diversity, distribution and floral specificity of tangle-veined flies (Diptera: Nemestrinidae in north west Patagonia, Argentina Diversidad, distribución y especificidad floral de nemestrínidos (Diptera en el noroeste de la Patagonia, Argentina

    Directory of Open Access Journals (Sweden)

    MARIANO DEVOTO

    2006-03-01

    Full Text Available Tangle-veined flies (Nemestrinidae constitute a primitive and rather widespread family among Diptera. The genus Trichophthalma occurs in Australia and South America and is the only one in the family with a typically Gondwanian, disjoint distribution. The ecology and distribution of most southern South American species of this genus remains virtually unknown. We studied the diversity, distribution and flower specificity of flower-visiting species of the genus Trichophthalma in the temperate forests of southern South America in ten sites along an east-west rainfall gradient (37-40°S on the eastern slope of the Andes. We recorded nine species of Trichophthalma, which showed an overlapped distribution along the gradient and different degrees of floral specificity. Three species are reported for Argentina for the first time and three are first recorded as flower visitors to the local flora. Our results show that while in southern Africa tangle-veined flies are engaged in highly specialized pollination interactions with long-tubed species, the Trichophthalma spp. of Patagonia share their flowers with a diverse and rather unspecialized visitor fauna among which several species of flies, bees and birds are presentLos nemestrínidos constituyen una familia de Dípteros primitiva y de amplia distribución. El género Trichophthalma se encuentra en Australia y Sudamérica y es el único en la familia con una distribución disjunta típicamente gondwánica. La ecología y distribución de la mayoría de las especies sudamericanas permanecen virtualmente desconocidas. Estudiamos la diversidad, distribución y especificidad floral de las especies del género Trichophthalma de los bosques templados del sur de Sudamérica en diez sitios ubicados a lo largo de un gradiente de precipitación este-oeste (37-40°S sobre la vertiente occidental de los Andes. Registramos nueve especies de Trichophthalma, las cuales mostraron una distribución superpuesta a lo largo

  6. Dinámica y Evolución de las Barreras Medanosas, Provincia de Buenos Aires, Argentina

    OpenAIRE

    Frederico I. Isla; Luis C. Cortizo; Horacio A. Turno Orellano

    2001-01-01

    Las barreras medanosas Oriental y Austral de Buenos Aires se originaron como consecuencia de la fluctuación holocena del nivel del mar que dejó abundante sedimento litoral que migró hacia el interior. De acuerdo a dataciones radiocarbónicas de materiales obtenidos por debajo de los niveles medanosos se reconocen 3 ciclos de generación de médanos costeros. El primero se originó con posterioridad a la colmatación de ambientes estuarinos (...

  7. Distribution pattern of macrozooplankton along the 140°E meridian in the Southern Ocean during austral summer 2002 and 2003

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    Atsushi Tanimura

    2008-03-01

    Full Text Available Field surveys were conducted along 140°E in the Southern Ocean north of Terre Adelie during three cruises: the KH cruise by RV Hakuho Maru, and TC1 and TC2 cruises by RV Tangaroa during the austral summers of 2002 and 2003. Macrozooplankton were sampled using a Rectangular Midwater Trawl (RMT 8: mesh size: 4.5mm; effective mouth area: 8m2 along each transect. Macrozooplankton communities were separated by the Southern Boundary of the Antarctic Circumpolar Current (SB-ACC based on cluster analysis. North of the SB-ACC, macrozooplankton assemblages comprised species of the northern oceanic community characterized by Salpa thompsoni, Euphausia frigida and Themisto gaudichaudii, while south of the SB-ACC, macrozooplankton assemblages were numerically dominated by Euphausia superba and/or Euphausia crystallorophias. It is suggested that the SB-ACC functions as the major biogeographic barrier to separate the macrozooplankton communities, and the contributions of macro- and meso-zooplankton to total zooplankton abundance varies seasonally as well as regionally in the Indian sector of the Southern Ocean crossing the SB-ACC.

  8. Nuevas evidencias de la presencia del Oso Andino (Tremarctos ornatus en las Yungas de Puno, el registro más austral de Perú

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    Gisella Márquez

    2011-05-01

    Full Text Available El oso de anteojos Tremarctos ornatus es el único representante de la familia Ursidae en Suramérica. La población más grande y de distribución continua del oso andino en el Perú, se localiza en la ladera oriental de la cordillera oriental, incluyendo al departamento de Puno, donde casi todos los registros de esta especie provienen solamente de encuestas. Se describe aquí dos registros indirectos de la presencia del oso en el departamento de Puno, obtenidos en agosto del año 2009. El primer registro corresponde a una feca, con semillas perteneciente a la familia Lauraceae, encontrada en Yanacocha; y el segundo registro corresponde a unas marcas de garras del oso hallado en Challohuma. Este último representa el registro más austral con- firmado para la distribución del oso de anteojos en el Perú. Nuestros registros evidencian una continuidad en la distribución de esta especie en la vertiente oriental de la cordillera andina, desde el sur del Perú hasta el noroeste de Bolivia. Estos registros se hallan también muy próximos al Parque Nacional Bahuaja Sonene (PNBS, uno de los corredores de conservación más importantes en el mundo, y muestran la importancia de establecer estrategias de conservación tanto dentro como fuera de la zona de amortiguamiento del PNBS.

  9. Growth and biomass production with enhanced {beta}-glucan and dietary fibre contents of Ganoderma australe ATHUM 4345 in a batch-stirred tank bioreactor

    Energy Technology Data Exchange (ETDEWEB)

    Papaspyridi, Lefki-Maria; Christakopoulos, Paul [BIOtechMASS Unit, Biotechnology Laboratory, School of Chemical Engineering, National Technical University of Athens, Athens (Greece); Katapodis, Petros [BIOtechMASS Unit, Biotechnology Laboratory, School of Chemical Engineering, National Technical University of Athens, Athens (Greece); Biotechnology Laboratory, Department of Biological Applications and Technologies, University of Ioannina, Ioannina (Greece); Gonou-Zagou, Zacharoula; Kapsanaki-Gotsi, Evangelia [Department of Ecology and Systematics, Faculty of Biology, National and Kapodistrian University of Athens, Athens (Greece)

    2011-02-15

    In this study we maximized biomass production by the basidiomycete Ganoderma australe ATHUM 4345, a species of pharmaceutical interest as it is a valuable source of nutraceuticals, including dietary fibers and glucans. We used the Biolog FF MicroPlate to screen 95 different carbon sources for growth monitoring. The pattern of substrate catabolism forms a substrate assimilation fingerprint, which is useful in selecting components for media optimization of maximum biomass production. Response surface methodology, based on the central composite design was applied to explore the optimum concentrations of carbon and nitrogen sources of culture medium in shake flask cultures. When the improved culture medium was tested in a 20-L stirred tank bioreactor, using 13.7 g/L glucose and 30.0 g/L yeast extract, high biomass yields (10.1{+-}0.4 g/L) and productivity of 0.09 g L{sup -1} h{sup -1} were obtained. The yield coefficients for total glucan and dietary fibers on biomass formed were 94.82{+-}6 and 341.15{+-}12.3 mg/g mycelium dry weight, respectively. (Copyright copyright 2011 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim)

  10. Community structure of copepods in the oceanic and neritic waters off Adélie and George V Land, East Antarctica, during the austral summer of 2008

    Science.gov (United States)

    Tachibana, Aiko; Watanabe, Yuko; Moteki, Masato; Hosie, Graham W.; Ishimaru, Takashi

    2017-06-01

    Copepods are one of the most important components of the Southern Ocean food web, and are widely distributed from surface to deeper waters. We conducted discrete depth sampling to clarify the community structure of copepods from the epi- to bathypelagic layers of the oceanic and neritic waters off Adélie and George V Land, East Antarctica, in the austral summer of 2008. Notably high diversity and species numbers were observed in the meso- and bathypelagic layers. Cluster analysis based on the similarity of copepod communities identified seven cluster groups, which corresponded well with water masses. In the epi- and upper- mesopelagic layers of the oceanic zone, the SB (Southern Boundary of the Antarctic Circumpolar Current) divided copepod communities. Conversely, in the lower meso- and bathypelagic layers (500-2000 m depth), communities were consistent across the SB. In these layers, the distributions of copepod species were separated by habitat depth ranges and feeding behaviour. The different food webs occur in the epipelagic layer with habitat segregation by zooplankton in their horizontal distribution ranges.

  11. Cuatro propuestas educativas de consumo responsable del tiempo extraescolar en la provincia de Burgos.

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    Dolores Fernández Malanda

    2012-01-01

    Full Text Available Presentamos en este artículo cuatro propuestas formativas llevadas a cabo durante los tiempos curriculares y extracurriculares en algunos centros escolares de la provincia de Burgos. Entre sus fines destacan objetivos de los documentos marco de la Unión Europea para impulsar la tolerancia y la solidaridad en los espacios de educación formal. Estas propuestas son: a talleres de Educación en Derechos Humanos de la ONG Amnistía Internacional, sección Burgos; b Programa “Por los Buenos Tratos” de la asociación Acciónenred, de Burgos; c los programas de Cruz Roja Juventud Burgos, y d programas de Ecoauditorias (La Escuela Sesostiene del Ayuntamiento de Burgos, Concejalía de Medio Ambiente.--------------------------------------------------------------------In this article we present four learning proposals that have bee implemented during both curricular and extracurricular periods in different schools in the province of Burgos. The goals of these proposals were based on propositions put forward by the European Union aimed towards developing tolerance and solidarity within formal educational contexts.These learning proposals were the following: a Human Rights education workshops conducted by Amnesty International in Burgos; b The “Por los Buenos Tratos” Program implemented by the Association Acciónenred in Burgos; c programs developed by the Youth Section of the Red Cross in Burgos, and d Ecoaudits (Sustainable Schools programs developed by the Environment Department of the Burgos City Council.

  12. El cuidado infantil entre muros: estrategias de mujeres encarceladas en la provincia de Buenos Aires

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    Irma Colanzi

    2016-12-01

    Full Text Available El objetivo del artículo es problematizar la noción de cuidado, desde una dimensión política (Faur, 2014 en el contexto de encierro punitivo. Se presenta un análisis de entrevistas con diferentes actores abocados al desarrollado de intervenciones frente a las mujeres madres encarceladas con sus hijos/as en la Unidad N°33 de la localidad de Los Hornos, en la provincia de Buenos Aires. El ejercicio del cuidado en el caso de las mujeres encarceladas, cumple una función doble, por un lado el control informal (Gentile & Tabbush, 2013 del sistema patriarcal que asigna de manera obligatoria el ejercicio del mismo por parte de las mujeres, aún en el caso de las mujeres madres detenidas. Por otro lado, en función de las características del aumento de prisionización de las mujeres por delitos de tenencia de estupefacientes, se indaga de estas en la economía ilegal, y se intenta establecer algunas reflexiones sobre el mencionado delito y la posibilidad de conciliar estrategias de supervivencia económica y cuidado.

  13. El periodo de integración en el Sur de la provincia de Loja

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    1982-01-01

    Full Text Available La période dite d'Intégration (Vème-XVème siècle est bien représentée dans la province de Loja, par une seule tradition culturelle peu diversifiée. Le début de cette période est très vraisemblablement marqué par l'arrivée d'un nouveau groupe ethnique dont l'origine reste à déterminer. Il paraît être en partie assimilable à celui connu dans la littérature ethnohistorique sous le nom de 'Paltas'. El periodo de Integración (siglos V-XV está bien representado, en la provincia de Loja, por una única tradición cultural, poco diversificada. El principio de este período corresponde seguramente a la llegada de un nuevo grupo étnico cuyo origen queda por determinar. Parece que podría ser asimilado al grupo conocido en los textos etnohistóricos bajo el nombre de 'Paltas'.

  14. Pueblos indígenas, Estado y Territorio en tiempos interculturales en la provincia de Salta

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    Mariana Andrea Schmidt

    2011-12-01

    Full Text Available La configuración del Estado argentino hacia fines del siglo XIX y principios del XX tuvo como uno de sus móviles principales la eliminación, asimilación e invisibilización de los pueblos indígenas. En las últimas décadas del siglo XX, se ha pasado de una política de invisibilización y homogeneización a otra de visibilización y reconocimiento de la diversidad cultural, promoviéndose la diversidad territorial, cultural y lingüística acallada durante décadas. El objetivo del presente artículo es indagar en las características asumidas por estos procesos en la provincia de Salta. Partiendo de considerar al Chaco salteño como territorio históricamente imaginado como indígena, interesa pensar cómo juegan estos imaginarios territoriales a la hora de diseñar e implementar políticas públicas para este territorio y su población.

  15. BIOMASA EN PLANTACIONES DE Eucalyptus viminalis Labill. DE LA PROVINCIA DE BUENOS AIRES, ARGENTINA

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    Paula Ferrere

    2008-01-01

    Full Text Available El presente trabajo se desarrolló en el oeste de la provincia de Buenos Aires, Argentina con el objetivo de ajustar funciones de biomasa de árboles individuales y determinar la biomasa en diferentes compartimientos de la planta y el sotobosque. Se identificaron rodales de Eucalyptus viminalis Labill. cuyas edades oscilaron entre 4 y 14 años. Se apearon 21 árboles con diámetros entre 9,2 y 32,5 cm. Se desarrollaron regresiones simples y múltiples y se estimó el volumen, la biomasa en ramas, hojas y fuste. Las ecuaciones de volumen de mejor comportamiento son basadas en modelos lineales en su forma normal, y el modelo más adecuado fue el que incorporó al d2 (R2 = 0,92. Para la estimación de la biomasa en hojas, ramas, copa y fuste se recomienda los modelos ln-ln que consideran el d y h o solo el d. El componente de la biomasa en hojas presentó una estimación más débil. La distribución de la biomasa en los individuos sigue el patrón de desarrollo que se encuentra en la bibliografía. La proporción de la biomasa en la copa disminuye con la edad, contrariamente a lo sucedido con el fuste.

  16. Estudio evaluativo de la escuela rural en la provincia de Cabinda, Angola

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    Fernando Bumba

    2017-01-01

    Full Text Available Este artículo presenta un estudio evaluativo de la escuela rural, específicamente de enseñanza primaria, en la provincia de Cabinda, Angola. El objetivo principal es conocer la situación actual del profesorado de las zonas rurales en educación primaria de Cabinda: el contexto, la infraestructura, los recursos y las condiciones en las que se desarrolla su labor docente. Para ello, se diseñó un estudio no experimental basado en la aplicación de un cuestionario, de escala tipo Likert, a los docentes de estas escuelas rurales. El análisis y la interpretación de los resultados obtenidos han permitido extraer inferencias, posibilitando la concreción de una serie de contribuciones relevantes y de importancia. Las escuelas rurales deben ser mejoradas tanto en infraestructura como en recursos y medios para facilitar un adecuado desempeño docente. Con ello, mediante una educación de calidad a toda la población escolar, se conseguirá la potenciación y el desarrollo de las zonas rurales.

  17. Educando al buen ciudadano. Las guardias nacionales en la Provincia de Cartagena, Colombia, 1832-1857

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    Flórez Bolívar, Roicer

    2010-12-01

    Full Text Available This article analyzes the role played by the National Guard in the Province of Cartagena in training and education of citizens between 1832 and 1857. Also, determine the social sectors that made up this institution. It supports the idea that members of this Guard, military service became a form of more direct political intervention, because during that century citizenship is closely associated with participation in the militias and because active citizen status implies the right and duty to belong to it. Similarly, the National Guard became an instrument of sociability and political pedagogy.

    Este artículo analiza el papel desempeñado por la Guardia Nacional en la Provincia de Cartagena en la formación y educación de los ciudadanos entre 1832 y 1857. Asimismo, se determinan los sectores sociales que integraban esta institución. Se sostiene la idea de que para sus miembros, el servicio de las armas se convirtió en una forma de intervención política más directa, ya que durante ese siglo la ciudadanía se asociaba estrechamente con la participación en las milicias y debido a que la condición de ciudadano activo implicaba el derecho y el deber de pertenecer a ella. De igual forma, la Guardia Nacional se convirtió en un instrumento de sociabilidad y pedagogía política.

  18. Helechos epífitos de Alsophila setosa (Cyatheaceae, Pteridophyta en la provincia de Misiones, Argentina

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    Gonzalo Javier Marquez

    2012-12-01

    Full Text Available Los cáudices de los helechos arborescentes presentan condiciones particulares que favorecen el establecimiento de epífitas. En este trabajo se estudiaron los helechos que crecen sobre Alsophila setosa Kaulf. (Cyatheaceae, Pteridophyta en la provincia de Misiones. Se encontraron 21 especies, que se agruparon en 10 géneros y 5 familias. La familia más diversa fue Polypodiaceae, con 8 especies, y los géneros mejor representados fueron Asplenium (6 y Pecluma (4. Se presenta una clave para la identificación de los taxa involucrados. La cantidad de especies epífitas encontradas sugiere que Alsophila setosa juega un papel importante como reservorio de biodiversidad en el bosque atlántico.Epiphyte ferns on Alsophila setosa (Cyatheaceae, Pteridophyta from Misiones province, Argentina. Trunks of tree ferns offer especially distinctive substrates to support epiphytes. In this paper, ferns that grow on Alsophila setosa Kaulf. from Misiones were studied. A total of 21 species, from 10 genera and 5 families, were recorded. Polypodiaceae (8 had greater specific diversity. Richest genera were Asplenium (6 and Pecluma (4. A key is presented to identify the taxa involved. The high epiphytic diversity found suggests that Alsophila setosa plays an important role as a biodiversity reservoir in the Atlantic forest.

  19. Historia del Boxeo en la provincia de las Tunas hasta 1990

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    Etián Jiménez Espinosa

    2009-09-01

    Full Text Available La presente investigación hace un estudio sobre los antecedentes, génesis, evolución y desarrollo del boxeo en la provincia en Las Tunas, el cual se realiza a partir de una periodización hasta nuestros días. El estudio responde a una de las problemáticas más complejas y necesarias del territorio, que responde a la carencia de información bibliográfica para impartir con la calidad pertinente la asignatura Historia del Deporte, en todos sus ámbitos – internacional, nacional y local- y con un enfoque de análisis totalizador. Se rescata la memoria histórica en su expresión deportiva como parte de la identidad cultural de la región. Las fuentes de la información fueron obtenidas de una acuciosa búsqueda en todos los medios de prensa local, antes y después del Triunfo de la Revolución, de una veintena de especialistas y conocedores del hecho histórico deportivo objeto de estudio. Además, se consultaron numerosas fuentes bibliográficas sobre la historia de este deporte en su manifestación a nivel nacional e internacional.

  20. Mujeres, noviazgo y trabajo. Una experiencia en la provincia de Buenos Aires, 1906-1910

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    Yolanda de Paz Trueba

    2016-06-01

    Full Text Available Durante el siglo XIX y en los albores del XX, la escritura de cartas fue el medio más difundido para establecer comunicación con personas a la distancia, pese a lo cual, cuando hablamos de la escritura epistolar de entonces, tendemos a pensar en mujeres de la élite que tenían acceso a cierta educación. Sin embargo, existen indicios de que escribir cartas era también una práctica de la clase trabajadora, como lo demuestra el caso de Rosa, la protagonista de la historia que nos proponemos contar aquí. De este modo, el presente artículo se basa en un corpus documental que implica un desafío: partir de un conjunto de cartas de amor producidas por una mujer trabajadora, buscando por su intermedio adentrarnos en una relación entre dos personas y avanzar al mismo tiempo en otras direcciones. Pretendemos  ir más allá de esa dimensión y de la vida privada para estar atentas a las concepciones y experiencias en torno al noviazgo y el matrimonio. En síntesis, buscamos, a través de Rosa, una mujer de la clase trabajadora del interior de la provincia de Buenos Aires, pensar en el amor como experiencia.

  1. Revolución y liberalismo en la provincia de Veracruz, 1812-1821

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    Ortiz Escamilla, Juan

    2002-08-01

    Full Text Available This article studies the insurrection movement in the province of Veracruz, with especial emphasis on the diversity of actors in a region which was both ethnically heterogeneous and very uneven from a geographical point of view. The different phases of the war, and their relation with the creation of constitutional municipalities provided for in the Cadiz Constitution, as well as the breaking down of the political hierarchy of the different territories, are described.

    Se estudia aquí el desarrollo de la insurgencia en la provincia de Veracruz, poniendo especialmente el acento en la diversidad de los actores de una región geográficamente muy variada y étnicamente heterogénea. Se describen las diferentes fases de la guerra y su relación con la creación de ayuntamientos constitucionales previstos por la Constitución de Cádiz, así como la desintegración de la jerarquía política de los territorios que ésta provoca.

  2. Sostenibilidad sociocultural del turismo: propuestas para el cantón Playas. Provincia del Guayas, Ecuador

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    José Lázaro Quintero Santos

    2016-03-01

    Full Text Available Este artículo forma parte de la investigación “Propuesta de un Modelo de Desarrollo Turístico Sostenible para el cantón Playas, provincia del Guayas, Ecuador”. En este caso solo se hace referencia a la propuesta de un modelo de sostenibilidad sociocultural de los impactos del turismo. La investigación se realiza en el cantón Playas debido a la importancia estratégica que tiene el desarrollo del turismo para este territorio gracias a su efecto multiplicador en el resto de las actividades económicas. La metodología de la investigación ha incluido un estudio cuantitativo y cualitativo del territorio, así como, entrevistas y encuestas a los actores locales. Para lograr el objetivo de esta investigación se ha realizado un análisis social y cultural considerando los recursos patrimoniales y socioculturales de la zona. El estudio comprende programas y proyectos que permiten formular una propuesta de turismo sostenible que sea inclusiva y respetuosa con las comunidades y sus culturas.

  3. LA ORGANIZACION DE PRODUCTORES FAMILIARES EN LAS FERIAS FRANCAS DE LA PROVINCIA DE CÓRDOBA

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    G. FERRER

    2017-12-01

    Full Text Available El objetivo de este artículo es comprender los procesos organizativos de 12 ferias francas de la provincia de Córdoba. Para ello se realizaron entrevistas a actores clave durante los años 2014 y 2015. Si bien las ferias francas son valoradas inicialmente como una solución apropiada tanto para los consumidores conscientes, como para los roductores familiares que buscan una alternativa de comercialización más sustentable, el análisis revela que las mismas son un campo social tensionado por relaciones de colaboración/competencia entre diversos actores que interactúan en el territorio. Los resultados permiten identifi car dos tendencias en disputa en la mayoría de los feriantes: i la asamblearia, que sostiene una posición individualista y confía en la regulación del proceso que realizan los consumidores y; ii la formalizante, que propicia la organización en comisiones internas que acuerden normas para el comportamiento de los feriantes.

  4. Roman glass in the province of Alicante | El vidrio romano en la provincia de Alicante

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    María Dolores Sánchez de Prado

    1984-12-01

    Full Text Available The aim of this study is to spread a sort of material quite ignored by the archaeologycal research: that's the glass, often obtained in the Roman villages and necropolis of Alicante. With regard to its characteristics, we have found two different types: — A top-quality glass, decorated with primitive motives, brought from oriental countries while 1st and 2nd centuries a. C. — A medium-to-low quality glass, decorated with very complicated motives, brought European factories since 3rd century a. C. Quality in raw material was descending as production was getting higher. | Este trabajo pretende fundamentalmente dar a conocer un material muy postergado por la investigación arqueológica: el vidrio, que se ha encontrado con relativa frecuencia en las ciudades y necrópolis de la provincia de Alicante. En el vidrio recogido se pueden distinguir dos grupos: — En las dos primeras centurias de nuestra Era se trata de un vidrio lujoso, de muy buena calidad, liso o decorado con motivos sencillos cuyo carácter es marcadamente oriental. — A partir del siglo III d. C., la calidad de las piezas es menor, aunque las decoraciones más complicadas. Las fábricas occidentales se imponen progresivamente.

  5. El Paleoceno-Mioceno de Península Mitre: antefosa y depocentro de techo de cuña de la cuenca Austral, Tierra del Fuego, Argentina The Paleocene-Miocene of Peninsula Mitre: foredeep and wedge-top of the Austral Basin, Tierra del Fuego, Argentina

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    Pablo J Torres Carbonell

    2009-07-01

    Full Text Available El sistema de cuenca de antepaís Austral-Malvinas adyacente al orógeno Fueguino comprende sedimen-titas marinas expuestas en el norte de Península Mitre, incluyendo 550 m de la antefosa del Paleoceno tardío-Eoceno temprano, y más de 2.900 m de la subcuenca María Luisa, depocentro de techo de cuña ('wedge-top' del Eoceno medio tardío-?Mioceno. La columna se subdivide en las formaciones La Barca (100 m, Paleoceno superior, Punta Noguera (450 m, Eoceno inferior, Leticia (30 m, Eoceno medio superior, Cerro Colorado (935 m, Eoceno medio superior-Eoceno superior, Puesto José (nom. nov., 1.600 m, Oligoceno y Malengüena (nom. nov., 216 m, ?Mioceno. La microfauna de la Formación Malengüena se distingue por el dominio de Globocassidulina cf brocha, y por su peculiar preservación, ambas características no reconocidas previamente en la porción argentina de la cuenca Austral. Se verifican discordancias sintectónicas entre el límite Paleoceno-Eoceno y el Eoceno medio, asociadas a una etapa de orogénesis regional: en el Eoceno más alto-Oligoceno basal, relacionada localmente con el anticlinal Campo del Medio; en el Oligoceno 'medio', asociada al retrocorrimiento Malengüena; y en el Mioceno ?inferior, relacionada con estructuras profundas de la faja corrida y plegada.The orogenic margin of the Austral-Malvinas foreland basin system is formed by a marine succession exposed at northern Península Mitre, composed of 550 m of the late Paleocene-early Eocene foredeep, and more than 2,900 m of the late middle Eocene-?Miocene María Luisa wedge-top sub-basin. The succession is subdivided in the following formations: La Barca (100 m, upper Paleocene, Punta Noguera (450 m, lower Eocene, Leticia (30 m, upper middle Eocene, Cerro Colorado (935 m, upper middle Eocene-upper Eocene, Puesto José (nom. nov, 1,600 m, Oligocene and Malengüena (nom. nov, 216 m, ?Miocene. The foraminiferal content of the Malengüena Formation is distinguished by the dominance

  6. LA GEOPEDOLOGIA COMO BASE PARA ZONIFICAR LA APTITUD FORESTAL EN UNA CUENCA DEL NOROESTE DE LA PATAGONIA ARGENTINA

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    Maria Cristina Frugoni

    2016-12-01

    Full Text Available Geopedology at a semi-detailed scale (1:50.000 was carried out in Buta Mallín catchment which includes an area of 21.065ha, in the northwest of Neuquén province, Argentine Patagonia. Geopedology provides a spatial dimension of soil-landscape relations, which are displayed in a map and its legend, showing the geoforms (contours and their soils (content, based on the premise that soil is landscape as well as profile. According to this approach three landscapes were recognized: glacial modeled mountains, plateau and valley. The relief consists mainly of steep to very steep slopes, and valley bottoms with poorly drained soils. Lithology (parent material corresponds to holocene volcanic ash in the western sector of the study area, while the eastern sector is dominated by tuff. Twenty terrain forms and their soils were identified. With this basic information, attribute tables were constructed considering landscape and soil properties. Regarding soils, physical fertility properties were considered, since these are the most correlated ones with Pinus ponderosa (pino ponderosa growth, the main species used in afforestation in Patagonia. Those tables were included and analized with a GIS (Geographic Information System to obtain a forest suitability map. The study area shows four forest suitability classes. Suitable: 37ha; moderately suitable: 4.512ha; marginally suitable: 6.072ha; not suitable: 10.444ha. The main limitations of the area are the very steep slopes, height and the areas dominated by rock outcrops and detrital covers. Nothofagus antarctica (ñire shrubs cover part of the suitable areas; because of conservation criteria of these natural communities, these lands were considered not suitable. On the other side, there are more than 4.000 ha of moderately suitable lands, which can be considered for a more detailed study. Transhumant cattle raising is the main land use system in this catchment, which is an ancient culture of the Northern Neuquian

  7. The role of natural mineral particles collected at one site in Patagonia as immersion freezing ice nuclei

    Science.gov (United States)

    López, María Laura; Borgnino, Laura; Ávila, Eldo E.

    2018-05-01

    This work studies the role of mineral particles collected in the region of Patagonia (Neuquén, Argentina) as ice nuclei particles (INPs) by immersion freezing mode. The particle immersion-freezing ability was analyzed under laboratory conditions by using an established drop-freezing technique. Mineralogical composition was characterized by using X-ray diffraction and electron micro probe analysis. Dynamic light scattering was used to determine the grain size distribution of particles, while the N2 adsorption and methylene blue adsorption methods were applied to determine their specific surface area. Water droplets of different volumes containing different concentrations of particles were cooled until droplets were frozen. For all the analyzed drop volumes, an increase in the freezing temperature of the drops was observed with increasing dust concentration. In the same way, the freezing temperature increased when the drop volume was increased at constant dust concentration. Both behaviors were linked to the availability of active sites in the particles. A plateau in the freezing temperature was observed at high suspension concentration for all the drop volumes. This plateau was related to the aggregation of the particles when the suspension concentration was increased and to the consequent decrease in the number of active sites. The active sites per unit of surface area were calculated and reported. For the studied range of temperature, results are in agreement with those reported for different sites and particles. From the chemical and morphological analysis of the particle components and the results obtained from the literature, it was concluded that even though montmorillonite was the main mineral in the collected sample, the accessory minerals deserve to be analyzed in detail in order to know if they could be responsible for the ability of the collected soil particles to act as INPs. Considering that the region of Patagonia has been identified as an important

  8. Proyecto de Plaza-Embarcadero en Caleta Tortel, Región de Aysén, Patagonia de Chile / Embarcadero Plaza-Project in Tortel, Region of Aysen Patagonia, Chile.

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    Medel Santibáñez, Paulina Andrea

    2007-06-01

    Full Text Available El proyecto de Título de Arquitectura, 2007, que se presenta tiene como objetivo central dar respuesta a necesidades reales, preservando y cuidando del medio local, tanto natural como sociocultural, dentro de la dinámica actual de cambios y apertura. Se reconoce los atributos y potencialidades propios de Caleta Tortel para preservar su identidad cultural y patrimonial a través de la consideración de la relación con su entorno, específicamente, reconociendo el vínculo entre la localidad y el mar como medio elemental que le da origen y permite su desarrollo. La “Plaza-Embarcadero" en Caleta Tortel es un conjunto de carácter público, de escala comunal y con un programa comunitario integrador y abierto para la interacción diaria y directa de los habitantes y visitantes.This work leading to the professional degree in architecture is an answer to certain needs of Caleta Tortel in the Chilean Patagonia, adapting itself to the local environment –social and natural- and to the changes of globalization. The core idea of this project is to preserve the spatial and economic link between the town and the sea. The proposed wharf is a meeting point for the neighbours and tourists.

  9. Biological invasion of Pinus ponderosa and Pinus contorta: case study of a forest plantation in Northwestern Patagonia; Invasion biologica de Pinus ponderosa y Pinus contorta: estudio de caso de una plantacion en la Patagonia noroccidental

    Energy Technology Data Exchange (ETDEWEB)

    Dezzotti, A.; Sbrancia, R.; Mortoro, A.; Monte, C.

    2009-07-01

    In the Southern Hemisphere, Pinus species from plantations can bring about processes of biological invasion that cause significant and permanent changes on the structure and functioning of surrounding natural ecosystems. The invasive character of Pinus ponderosa (P) and Pinus contorta (C) was examined for a 20-year old plantation located in the Alicura Forest Station (40 degree centigrade 40' S and 71 degree centigrade 00' W), through the analysis of abundance, age and spatial structures, and dispersal of natural regeneration. Seedlings and saplings were located largely within the plantation boundaries, and exhibited a density of 6.9 ind / ha (41 % for P and 59 % for C), a clustered spatial pattern with clumps dispersed not randomly, and a mean dispersal rate of 9.5 m / yr for P. ponderosa and 5.4 m / yr for P. contorta. Both species were invading the adjacent area, according to technical criteria based on ecological responses. However, regeneration niche is strongly hindering tree establishment and dispersal, probably due to high plant cover, presence of vertic soils, and absence of ectomycorrhizal fungi. These results can contribute to predict the capability of P. contorta and P. ponderosa to become invasive, in order to maximize the positive balance of forestry based on these species in northwestern Patagonia. (Author) 50 refs.

  10. Autolysis at the disintegrin domain of patagonfibrase, a metalloproteinase from Philodryas patagoniensis (Patagonia Green Racer; Dipsadidae) venom.

    Science.gov (United States)

    Peichoto, María E; Paes Leme, Adriana F; Pauletti, Bianca A; Batista, Isabel Correia; Mackessy, Stephen P; Acosta, Ofelia; Santoro, Marcelo L

    2010-09-01

    Patagonfibrase is a 57.5-kDa hemorrhagic metalloproteinase isolated from the venom of Philodryas patagoniensis (Patagonia Green Racer), a South American rear-fanged snake. Herein we demonstrate that patagonfibrase undergoes autolysis at its pH optimum (7.5) and at 37 degrees C, primarily producing a approximately 32.6 kDa fragment composed of disintegrin-like and cysteine-rich domains, as identified by mass spectrometry and N-terminal sequencing. The autolysis site for production of this fragment is similar to that observed for metalloproteinases from front-fanged Viperidae snake venoms. In the presence of Ca(2+), patagonfibrase was only partially autolysed, giving rise mainly to one fragment of approximately 52.2 kDa. In addition, calcium markedly enhanced the azocaseinolytic activity of patagonfibrase. Our findings contribute to the understanding of the structural and mechanistic bases of this family of metalloenzymes that are widely distributed among snake venoms, demonstrating that important post-translational modifications such as proteolysis can also contribute to the diversity and complexity of proteins found in rear-fanged snake venoms. Copyright © 2010 Elsevier B.V. All rights reserved.

  11. Forest Typification to Characterize the Structure and Composition of Old-growth Evergreen Forests on Chiloe Island, North Patagonia (Chile

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    Jan R. Bannister

    2013-11-01

    Full Text Available The Evergreen forest type develops along the Valdivian and North-Patagonian phytogeographical regions of the south-central part of Chile (38° S–46° S. These evergreen forests have been scarcely studied south of 43° S, where there is still a large area made up of old-growth forests. Silvicultural proposals for the Evergreen forest type have been based on northern Evergreen forests, so that the characterization of the structure and composition of southern Evergreen forests, e.g., their typification, would aid in the development of appropriate silvicultural proposals for these forests. Based on the tree composition of 46 sampled plots in old-growth forests in an area of >1000 ha in southern Chiloé Island (43° S, we used multivariate analyses to define forest groups and to compare these forests with other evergreen forests throughout the Archipelago of North-Patagonia. We determined that evergreen forests of southern Chiloé correspond to the North-Patagonian temperate rainforests that are characterized by few tree species of different shade tolerance growing on fragile soils. We discuss the convenience of developing continuous cover forest management for these forests, rather than selective cuts or even-aged management that is proposed in the current legislation. This study is a contribution to forest classification for both ecologically- and forestry-oriented purposes.

  12. Differential use of the Argentine shelf by wintering adults and juveniles southern giant petrels, Macronectes giganteus, from Patagonia

    Science.gov (United States)

    Blanco, Gabriela S.; Quintana, Flavio

    2014-08-01

    To study habitat use and at-sea movements of southern giant petrels (SGP) during non-breeding period, we deployed 15 satellite transmitters (six adults, nine juveniles) at Isla Arce and Isla Gran Robredo colonies in Patagonia, Argentina. Birds were instrumented during 81.4 ± 37 days. Adult birds used 74% of the Argentine shelf concentrating mainly at the shelf break, middle shelf waters, and the surroundings of the colony. After fledging, juveniles spread to the Argentine, Uruguayan and Brazilian shelves within the South Atlantic. Adults alternated at-sea excursions (12 ± 5 days) with periods at the colony of 3 ± 0.3 days. Contrarily, juveniles moved first to the shelf break and then traveled northwards reaching the south of Brazil. There was some spatial overlap between age classes, but only during the first 30 days after juveniles had fledged; thereafter there was not overlap between the areas used by both age classes. The Argentine shelf is widely used by different species offering a suitable environment for foraging; this may be why adults SGP from Patagonian colonies spend all year-round within the Argentine shelf. The identification of used areas of non-breeding SGP fills a gap in the species knowledge contributing not only to the preservation the species, but also to the management of marine areas globally recognized as important for many other Procellariiformes.

  13. Late Cretaceous paleosols as paleoclimate proxies of high-latitude Southern Hemisphere: Mata Amarilla Formation, Patagonia, Argentina

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    Varela, Augusto N.; Raigemborn, M. Sol; Richiano, Sebastián; White, Tim; Poiré, Daniel G.; Lizzoli, Sabrina

    2018-01-01

    Although there is general consensus that a global greenhouse climate characterized the mid-Cretaceous, details of the climate state of the mid-Cretaceous Southern Hemisphere are less clearly understood. In particular, continental paleoclimate reconstructions are scarce and exclusively derived from paleontological records. Using paleosol-derived climofunction studies of the mid- to Upper Cretaceous Mata Amarilla Formation, southern Patagonia, Argentina, we present a reconstruction of the mid-Cretaceous climate of southern South America. Our results indicate that at 60° south paleolatitude during the Cenomanian-Santonian stages, the climate was subtropical temperate-warm (12 °C ± 2.1 °C) and humid (1404 ± 108 mm/yr) with marked rainfall seasonality. These results are consistent with both previous estimations from the fossil floras of the Mata Amarilla Formation and other units of the Southern Hemisphere, and with the previous observations of the displacement of tropical and subtropical floras towards the poles in both hemispheres. The data presented here show a more marked seasonality and slightly lower mean annual precipitation and mean annual temperature values than those recorded at the same paleolatitudes in the Northern Hemisphere.

  14. Kelp and dolphin gulls cause perineal wounds in South American fur seal pups (Arctocephalus australis) at Guafo Island, Chilean Patagonia.

    Science.gov (United States)

    Seguel, Mauricio; Muñoz, Francisco; Montalva, Felipe; Perez-Venegas, Diego; Pavés, Héctor; Gottdenker, Nicole

    2017-07-01

    During five reproductive seasons, we documented the presence, extent and origin of perineal wounds in South American fur seal pups ( Arctocephalus australis ) on Guafo Island, Northern Chilean Patagonia. The seasonal prevalence of perineal wounds ranged from 5 to 9%, and new cases were more common at the end of the breeding season (February), when pups were on average two months old and were actively expelling hookworms ( Uncinaria sp). Histologically, wounds corresponded to marked ulcerative lymphoplasmacytic and histiocytic dermatitis with granulation tissue and mixed bacterial colonies. In 2015 and 2017, kelp gulls ( Larus dominicanus ) and dolphin gulls ( Leucophaeus scoresbii ) were observed picking and wounding the perineal area of marked pups. This behaviour occurred more frequently after the pups' defecation, when sea gulls engaged in consumption of pups' faeces. The affected pups usually had moderate to marked hookworm infections along with bloody diarrhoea and anaemia. Pups with severe wounds (23% of affected animals) had swollen perineal areas and signs of secondary systemic bacterial infection. We propose that seagulls on Guafo Island have learned to consume remains of blood and parasites in the faeces of pups affected by hookworm infection, causing perineal wounds during this process. We conclude that this perineal wounding is an unintentional, occasional negative effect of an otherwise commensal gull-fur seal relationship.

  15. Levels of essential and toxic elements in Porphyra columbina and Ulva sp. from San Jorge Gulf, Patagonia Argentina

    International Nuclear Information System (INIS)

    Perez, Adriana Angela; Farias, Silvia Sara; Strobl, Analia Mabel; Perez, Laura Beatriz; Lopez, Clara Magdalena; Pineiro, Adriana; Roses, Otmaro; Fajardo, Maria Angelica

    2007-01-01

    Baseline concentration levels of As, B, Ca, Cd, Cr, Cu, Co, Fe, Mg, Mn, Mo, Ni, P, Pb, Se, V, and Zn were determined for Porphyra columbina and Ulva sp. collected from three locations along San Jorge Gulf, in Patagonia Argentina. Elements were quantified by inductively coupled plasma-optical emission spectrometry, with the exception of lead and cadmium in some samples which were determined by electrothermal atomic absorption spectrometry. Three stations with different exposure degree to human activities, Bahia Solano, the mouth of Arroyo La Mata stream and Punta Maqueda, were selected as sampling points. The results showed a wide range of metal retention capacity between the two studied species. Regarding the levels of pollutants found in the researched sites, Punta Maqueda seemed to be less influenced by anthropogenic activities than the other two sites except for Cd. Taking into account their toxicities seasonal variations in Pb and Cd levels were studied in both algae in Punta Maqueda. Maximum concentrations of Cd (9.8 μg g -1 dry wt.) were observed in P. columbina during winter, and maximum levels of Pb (0.82 μg g -1 dry wt.) were detected in Ulva sp. during summer. Legislative and health safety aspects were evaluated for Cd and Pb

  16. Utility of high-altitude infrared spectral data in mineral exploration: Application to Northern Patagonia Mountains, Arizona

    Science.gov (United States)

    Berger, B.R.; King, T.V.V.; Morath, L.C.; Phillips, J.D.

    2003-01-01

    Synoptic views of hydrothermal alteration assemblages are of considerable utility in regional-scale minerals exploration. Recent advances in data acquisition and analysis technologies have greatly enhanced the usefulness of remotely sensed imaging spectroscopy for reliable alteration mineral assemblages mapping. Using NASA's Airborne Visible Infrared Imaging Spectrometer (AVIRIS) sensor, this study mapped large areas of advanced argillic and phyllic-argillic alteration assemblages in the southeastern Santa Rita and northern Patagonia mountains, Arizona. Two concealed porphyry copper deposits have been identified during past exploration, the Red Mountain and Sunnyside deposits, and related published hydrothermal alteration zoning studies allow the comparison of the results obtained from AVIRIS data to the more traditional field mapping approaches. The AVIRIS mapping compares favorably with field-based studies. An analysis of iron-bearing oxide minerals above a concealed supergene chalcocite deposit at Red Mountain also indicates that remotely sensed data can be of value in the interpretation of leached caps above porphyry copper deposits. In conjunction with other types of geophysical data, AVIRIS mineral maps can be used to discriminate different exploration targets within a region.

  17. Heavy metal and trace elements in riparian vegetation and macrophytes associated with lacustrine systems in Northern Patagonia Andean Range.

    Science.gov (United States)

    Juárez, Andrea; Arribére, María A; Arcagni, Marina; Williams, Natalia; Rizzo, Andrea; Ribeiro Guevara, Sergio

    2016-09-01

    Vegetation associated with lacustrine systems in Northern Patagonia was studied for heavy metal and trace element contents, regarding their elemental contribution to these aquatic ecosystems. The research focused on native species and exotic vascular plant Salix spp. potential for absorbing heavy metals and trace elements. The native species studied were riparian Amomyrtus luma, Austrocedrus chilensis, Chusquea culeou, Desfontainia fulgens, Escallonia rubra, Gaultheria mucronata, Lomatia hirsuta, Luma apiculata, Maytenus boaria, Myrceugenia exsucca, Nothofagus antarctica, Nothofagus dombeyi, Schinus patagonicus, and Weinmannia trichosperma, and macrophytes Hydrocotyle chamaemorus, Isöetes chubutiana, Galium sp., Myriophyllum quitense, Nitella sp. (algae), Potamogeton linguatus, Ranunculus sp., and Schoenoplectus californicus. Fresh leaves were analyzed as well as leaves decomposing within the aquatic bodies, collected from lakes Futalaufquen and Rivadavia (Los Alerces National Park), and lakes Moreno and Nahuel Huapi (Nahuel Huapi National Park). The elements studied were heavy metals Ag, As, Cd, Hg, and U, major elements Ca, K, and Fe, and trace elements Ba, Br, Co, Cr, Cs, Hf, Na, Rb, Se, Sr, and Zn. Geochemical tracers La and Sm were also determined to evaluate contamination of the biological tissues by geological particulate (sediment, soil, dust) and to implement concentration corrections.

  18. Reproductive biology of Sympterygia bonapartii (Chondrichthyes: Rajiformes: Arhynchobatidae in San Matías Gulf, Patagonia, Argentina

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    María L. Estalles

    2017-04-01

    Full Text Available ABSTRACT This study estimates and analyses the reproductive parameters and cycle of Sympterygia bonapartii in San Matías Gulf, northern Patagonia, Argentina. A total of 827 males and 1,299 females were analysed. Males ranged from 185 to 687 mm of total length (TL and females from 180 to 742 mm TL. Sexual dimorphism was detected; females were larger, heavier, exhibited heavier livers, wider discs and matured at lager sizes than males. Immature females ranged from 180 to 625 mm TL, maturing females from 408 to 720 mm TL, mature ones from 514 to 742 mm TL and females with egg capsules from 580 to 730 mm TL. Immature males ranged from 185 to 545 mm TL, maturing ones from 410 to 620 mm TL and mature males from 505 to 687 mm TL. Size at which 50% of the skates reached maturity was estimated to be 545 mm TL for males and 594 mm TL for females. According to the reproductive indexes analysed, S. bonapartii exhibited a seasonal reproductive pattern. Mating may occur during winter-early spring and the egg-laying season, during spring and summer.

  19. A multi-decadal remote sensing study on glacial change in the North Patagonia Ice Field Chile

    Science.gov (United States)

    Tetteh, Lucy Korlekwor

    Glaciers in the North Patagonian Ice Fields are temperate glaciers and can be studied to understand the dynamics of climate change. However, the ice field has been neglected in mass balance studies. In this study, multi decadal study of glacial mass balance, glacier retreat and glacial lake expansion in the North Patagonia were studied. Landsat (TM, ETM+ and 8) and ASTER images were used. San Quintin glacier experienced the highest retreat. Demarcation of glacier lakes boundaries indicated an increase in glacial lake area an addition of 4 new glacial lakes. Nef glacier recorded the highest mass gain of 9.91 plus or minus 1.96 m.w.e.a.-1 and HPN-4 glacier recorded the highest mass loss of -8.9 plus or minus 1.96 m.w.e.a. -1. However, there is a high uncertainty in the elevation values in the DEM due to the rugged nature of the terrain and presence of the heavy snow cover.

  20. Selected contributions from the 9th International Conference on Tidal Sedimentology, November 2015, Puerto Madryn, Patagonia, Argentina: an introduction

    Science.gov (United States)

    Scasso, Roberto A.; Cuitiño, José I.

    2017-08-01

    This special issue of Geo-Marine Letters presents selected contributions from the 9th International Conference on Tidal Sedimentology held on 17-19 November 2015 in Puerto Madryn, Chubut Province, Patagonia, Argentina. The guest editors are the conference organizers Roberto A. Scasso and José I. Cuitiño. Gerardo M. Perillo was the head of the Scientific Committee. The conferences on tidal sedimentology have been traditionally held every 4 years. However, only 3 years separated the last conference held in Caen (France, 2012) from this conference. Increasing numbers of contributions and the growing interest in tidal sedimentation have been the reasons for shortening the inter-conference period. The 2015 conference served as a discussion forum focusing on advances in modern and ancient tidal sedimentation at different locations worldwide. The papers presented in this Special Issue provide a selective view of the latest research results, the main topics dealing with tidal hydrodynamics and sediment transport, tidal coastal morphodynamics, modern and ancient tidal sedimentation, geotechnical processes in tidal environments, and tidal basins, facies and reservoirs.

  1. Levels of essential and toxic elements in Porphyra columbina and Ulva sp. from San Jorge Gulf, Patagonia Argentina

    Energy Technology Data Exchange (ETDEWEB)

    Perez, Adriana Angela [Catedras de Toxicologia y Quimica Legal, Biologia y Bromatologia y Nutricion, Universidad Nacional de la Patagonia San Juan Bosco, Chubut (Argentina); Farias, Silvia Sara [Comision Nacional de Energia Atomica, Gerencia de Tecnologia y Medio Ambiente, Buenos Aires (Argentina); Strobl, Analia Mabel [Catedras de Toxicologia y Quimica Legal, Biologia y Bromatologia y Nutricion, Universidad Nacional de la Patagonia San Juan Bosco, Chubut (Argentina); Perez, Laura Beatriz [Catedras de Toxicologia y Quimica Legal, Biologia y Bromatologia y Nutricion, Universidad Nacional de la Patagonia San Juan Bosco, Chubut (Argentina); Lopez, Clara Magdalena [Catedra de Toxicologia y Quimica Legal, Facultad de Farmacia y Bioquimica, Universidad de Buenos Aires (Argentina); Pineiro, Adriana [Catedra de Toxicologia y Quimica Legal, Facultad de Farmacia y Bioquimica, Universidad de Buenos Aires (Argentina); Roses, Otmaro [Catedra de Toxicologia y Quimica Legal, Facultad de Farmacia y Bioquimica, Universidad de Buenos Aires (Argentina); Fajardo, Maria Angelica [Catedras de Toxicologia y Quimica Legal, Biologia y Bromatologia y Nutricion, Universidad Nacional de la Patagonia San Juan Bosco, Chubut (Argentina)]. E-mail: copipat@sinectis.com.ar

    2007-04-15

    Baseline concentration levels of As, B, Ca, Cd, Cr, Cu, Co, Fe, Mg, Mn, Mo, Ni, P, Pb, Se, V, and Zn were determined for Porphyra columbina and Ulva sp. collected from three locations along San Jorge Gulf, in Patagonia Argentina. Elements were quantified by inductively coupled plasma-optical emission spectrometry, with the exception of lead and cadmium in some samples which were determined by electrothermal atomic absorption spectrometry. Three stations with different exposure degree to human activities, Bahia Solano, the mouth of Arroyo La Mata stream and Punta Maqueda, were selected as sampling points. The results showed a wide range of metal retention capacity between the two studied species. Regarding the levels of pollutants found in the researched sites, Punta Maqueda seemed to be less influenced by anthropogenic activities than the other two sites except for Cd. Taking into account their toxicities seasonal variations in Pb and Cd levels were studied in both algae in Punta Maqueda. Maximum concentrations of Cd (9.8 {mu}g g{sup -1} dry wt.) were observed in P. columbina during winter, and maximum levels of Pb (0.82 {mu}g g{sup -1} dry wt.) were detected in Ulva sp. during summer. Legislative and health safety aspects were evaluated for Cd and Pb.

  2. Pensar una Patagonia con dos océanos: el proyecto de desarrollo de Ezequiel Ramos Mexía

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    Susana Bandieri

    2009-01-01

    Full Text Available Las posibilidades productivas de la región, con escasas condi - ciones para las prácticas agrícolas pero adecuadas para la ganadería extensiva, predominantemente lanar, hicieron finalmente que la inser - ción patagónica se pensara dentro del mismo modelo de crecimiento “hacia afuera” delineado para el conjunto nacional sobre fines del siglo XIX y comienzos de XX. El único intento superador producido en ese período, aunque frustrado, lo constituyó el proyecto de desarro - llo patagónico elaborado por el Ministro de Obras Públicas del presi - dente Figueroa Alcorta, Ezequiel Ramos Mexía, concretado en la “Ley de Fomento de los Territorios Nacionales” nº 5.559 del año 1908. El ministro, hijo y nieto de estancieros bonaerenses, tenía una concep - ción amplia en materia de desarrollo económico y, en ese sentido, la Patagonia aparecía como el territorio adecuado para generar algunos cambios en un país que por entonces sólo se pensaba en términos agrícolas y pastoriles.

  3. Estructura productiva, pobreza y problemas de empleo en las provincias pampeanas y norteñas de Argentina en los primeros años del siglo XXI

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    Fernando Longhi

    2017-01-01

    Full Text Available Argentina, históricamente, ha presentado profundas desigualdades socioeconómicas regionales. Las provincias del Noroeste mostraron notorias diferencias respecto a las pampeanas en la producción de riqueza. Así, a fines del siglo xx, mientras en las provincias pampeanas la pobreza alcanzaba al 32,9% de su población, en el norte estas privaciones se duplicaban. Este artículo tiene por objeto analizar comparativamente las características de estas privaciones —considerando escalas provinciales y departamentales—, vinculándolas a su vez con las transformaciones económicas y productivas y con los problemas de empleo a lo largo del siglo xx e inicios del xxi. Los resultados advierten un notorio proceso de fragmentación socioterritorial como corolario de la persistencia de la desigualdad. Se destaca el recrudecimiento de dicha fragmentación en determinadas provincias y departamentos argentinos.

  4. Sistema de salud pública y comunidades indígenas de la Provincia de Formosa

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    Cristina S. Mirassou

    2013-10-01

    Full Text Available Relato de la experiencia de la autora en el ejercicio de la medicina y la salud pública entre los aborígenes de la provincia de Formosa, Argentina; la experiencia cubre 34 años, 11 de los cuales la realizó en una pequeña comunidad Wichí ubicada en el extremo noroeste, lindante con la provincia de Salta, Bolivia y Paraguay. De los 530 162 habitantes de la provincia 43 358 (6.5% son pueblos originarios de las etnias Wichí, Qom, y Pilagá. Los problemas particulares de estas comunidades se deben a las distancias entre las comunidades y los servicios médicos regulares, y a las diferencias culturales. La situación mejoró en los últimos 30 años al facilitar y acercar los servicios médicos a las poblaciones, incorporar y mejorar la preparación de las parteras aborígenes, formar agentes sanitarios, auxiliares médicos y la mejora de las condiciones sociales en general. Los resultados más destacados fueron la disminución de los índices de mortalidad infantil, de la incidencia de tuberculosis, ninguna muerte por meningitis tuberculosa desde 1999. Es de importancia haber incorporado a la enseñanza los idiomas propios de las etnias y el manifiesto respeto a sus diferentes costumbres. Los cambios originaron nuevos riesgos: accidentes viales, alcoholismo en los jóvenes, obesidad, diabetes (antes no diagnosticada, y crisis de liderazgo en las comunidades.

  5. TUMOR PHYLLODES DE LA MAMA.CARACTERIZACIÓN EN LA PROVINCIA CIENFUEGOS.ESTUDIO DE 20 AÑOS

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    Lidia Torres Aja

    2007-01-01

    Full Text Available El tumor Phyllodes de la mama es poco frecuente. Tiene un origen fibroepitelial con potencial agresivo y representa el 0.3% a 0.4% de todos los tumores mamarios y el 2.5% a 3% de los tumores epiteliales de dicho órgano.Objetivo: Nuestro objetivo fundamental es caracterizar desde el punto de vista clínico patológico los tumores Phyllodes operados en la provincia de Cienfuegos durante 20 años.Tipo de estudio: descriptivo prospectivo observacional. Periodo evaluado: 20 años desde 1 de enero de 1987 hasta el 31 de diciembre del 2006. Universo: 57 pacientes.Métodos: para realizar nuestra investigación hemos seguido anualmente durante estos 20 años los casos operados en nuestra provincia, examinando personalmente los casos en consulta de Mastología antes de operarlos y siguiéndolo por consulta de operados durante más de 5 añosResultados fundamentales: como resultados fundamentales de nuestra investigación obtuvimos que se operaron en esos 20 años un total de 57 tumores Phyllodes, los cuales representaron el 2.9% del total de tumores fibroepiteliales de mama operados.Aunque el mayor número de casos se detectó en pacientes de más de 40 años, queremos resaltar que en este periodo se operaron los únicos tumores Phyllodes en niña y en adolescente reportados en nuestra provincia

  6. Comportamiento del cáncer de mama en la provincia de Cienfuegos. Quinquenio 2007-2011

    Directory of Open Access Journals (Sweden)

    Lidia Torres Ajá

    2013-09-01

    Full Text Available Fundamento: el cáncer de mama representa la primera localización y segunda causa de muerte por tumores malignos en el sexo femenino en Cuba, lo cual ha hecho que sea considerado un problema de salud y una línea priorizada de investigación por parte del Ministerio de Salud Pública. Objetivo: caracterizar el comportamiento del cáncer de mama en la provincia de Cienfuegos en el quinquenio 2007-2011. Métodos: se realizó un estudio descriptivo, prospectivo, del total de pacientes operados de cáncer de mama en la provincia de Cienfuegos durante 5 años, comprendidos desde el 1 de enero de 2007 al 31 de diciembre del 2011. Se analizaron las variables: sexo, edad, mama afectada, localización topográfica, variante histológica, etapa clínica en el momento del diagnóstico, modalidad de biopsia utilizada y técnicas quirúrgicas aplicadas. Para la recolección de los datos se confeccionó un modelo que fue aplicado a cada paciente, además de revisarse las historias clínicas y protocolos biópsicos. Resultados: existen tasas de incidencia altas en este quinquenio. Existe predominio de afectación en pacientes mayores de 50 años y el carcinoma ductal infiltrante es la modalidad más diagnosticada. El 80,6 % de los tumores se diagnosticaron en etapas tempranas. Conclusiones: el cáncer de mama constituye un problema de salud en la provincia de Cienfuegos, con altas tasas de incidencia, y con un 80,6 % de los tumores diagnosticados en etapas curables.

  7. La caza mayor y le economía rural en la provincia de Toledo

    Directory of Open Access Journals (Sweden)

    Martín Fernández, Ángel Julián

    2004-06-01

    Full Text Available Leisure or business? Is it the hunt a really profitable activity? If it is like that, who are the biggest beneficiaries? How it has influenced in the most disadvantaged rural zones? Here there are some of the questions about economic and social reality of hunting, and its answers are tried to be approached in this work, for a confirmed hunting tradition zone as «Los Montes de Toledo», in the province of the same name, where are placed the most of the best major hunting areas in the Toledo province. The Mounts of Toledo, due to its excellent natural resources for the hunting and to the crisis of the agrarian traditional utilizations, constitute an area where the major hunt is the most adapted use to contribute to the biological balance with a rational management.

    [es] ¿Ocio o negocio?, ¿es la caza una actividad verdaderamente rentable? Si es así, ¿quiénes son los mayores beneficiarios?, ¿cómo repercute en las zonas rurales más desfavorecidas? Estas son algunas de las cuestiones que la caza, como realidad económica y social, plantea, y cuyas respuestas se pretende abordar en este trabajo desarrollado en una zona de contrastada tradición cinegética como es la comarca de los Montes de Toledo en la provincia del mismo nombre, como lo demuestra el hecho de que la mayor parte de los cotos de caza mayor de la provincia de Toledo, se hallen en esta comarca. Los Montes de Toledo debido a sus excelentes recursos naturales para la caza y a la crisis de los aprovechamientos agrarios tradicionales, constituyen un espacio en el que la práctica de la caza mayor, es el uso más adecuado para contribuir a la conservación del equilibrio biológico, siempre que este aprovechamiento se realice racionalmente. [fr] Loisir ou affaire? Est-ce que la chasse est une activité vraiment rentable? Le cas échéant, qui sont leur principaux bénéficiaires?, quelles sont leur conséquences dans les espaces ruraux les plus défavorisés? Ce sont

  8. ESTUDIO DE HÁBITOS DEPORTIVOS EN LA PROVINCIA DE GRANADA

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    M. Martí­nez

    2010-09-01

    Full Text Available

     

    RESUMEN

    Este artículo es, fundamentalmente, una propuesta de estrategia a seguir para el análisis de la situación actual del fenómeno deportivo en nuestra sociedad. Al mismo tiempo como iniciativa subvencionada por la Diputación Provincial de Granada en su área de Deporte este estudio tiene un doble objetivo, en primer lugar conocer la realidad de Granada y su provincia en materia deportiva y en segundo lugar el poder realizar tras el análisis de los datos, una política adecuada a las necesidades y demandas detectadas. El cuestionario se diseñó con 272 items, siendo aplicado a una muestra de 2.400 sujetos con un nivel de confianza de +95%. Se ha utilizado un muestreo por conglomerados polietápicos por edades, sexo y estratos de población. Las dimensiones del estudio versan sobre imagen del deporte, hábitos deportivos, ocupación del tiempo libre, deporte competición y asociacionismo, deporte escolar, oferta deportiva pública y privada e instalaciones y equipamientos deportivos. Como primeros resultados relevantes podemos destacar la imagen positiva que existe del deporte para todos en la provincia de Granada, el mayor porcentaje de práctica deportiva en el hombre respecto a la mujer granadina, la importancia que otorgan los padres a la educación física y deportiva de sus hijos, el aumento de práctica fisico-deportiva en espacios al aire libre y el interés de realización de actividad física entorno a la salud y la diversión.
    PALABRAS CLAVE: Hábitos deportivos, demanda deportiva, cuestionario.

     

    ABSTRACT

    This article is, a proposition of strategie to follow to analice de actual situation of sporting phenomenon in our society.
    At the same time this study, that it appears like a grant iniciative from Granada County Council in her Sport Area, has a

  9. Estado nutricional infanto juvenil en seis provincias de Argentina: variación regional

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    Oyhenart, Evelia Edith

    2008-01-01

    Full Text Available En Argentina si bien se dispone de información de prevalencias de malnutrición (desnutrición y exceso de peso, existe dificultad en la comparación debido a que en la mayor parte de los casos hay disparidad en las técnicas y/o metodologías empleadas. El objetivo del presente trabajo es analizar el estado nutricional de la población infanto-juvenil de seis provincias: Buenos Aires (Brandsen y La Plata, Catamarca (Catamarca, Chubut (Puerto Madryn, Jujuy (San Salvador de Jujuy, La Pampa (Santa Rosa y Toay y Mendoza (General Alvear, empleando la misma metodología de estudio a fin de disponer de elementos diagnósticos que permitan su contrastación. Se midieron, en el período 2003-2005, peso corporal (kg y talla (cm en una muestra de 15011 escolares asistentes a 102 establecimientos escolares comprendidos entre los 3 y 18 años de edad. Con los datos obtenidos se analizaron los indicadores Talla/Edad, Peso/Talla, Peso/Edad e Indice de Masa Corporal (IMC. Los indicadores de desnutrición fueron comparados con los valores de referencia provenientes del NCHS y las prevalencias de baja talla para la edad (BT/E, bajo peso para la talla (BP/T y bajo peso para la edad (BP/E se calcularon tomando como punto de corte el percentilo 5 de dicha referencia. Para sobrepeso (S y obesidad (O se tomaron puntos de corte proyectados sobre los valores adultos de 25 y 30 Kg/m2 según edad y sexo propuestos por la referencia Internacional Obesity Task Force. A fin de disponer de información socio-ambiental de las zonas de estudio se analizaron indicadores demográficos, económicos, sociales y ambientales. Cuando fue posible, se utilizaron los datos provenientes del Censo Nacional de Población y Vivienda (CNPyV 2001, de las Encuestas Permanentes de Hogares (EPH, INDEC, de la Dirección de Estadísticas de Salud del Ministerio de Salud de la Nación (DEIS, MSyA y de otros organismos oficiales. Las prevalencias generales de desnutrición (BT/E, BP/T y BP/E y

  10. Comportamiento de la lepra en la provincia de Las Tunas, 2003-2012

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    Martha O León Cabrales

    2014-08-01

    Full Text Available Se realizó un estudio descriptivo de corte transversal, para determinar algunas características epidemiológicas de la incidencia de la lepra, que es una enfermedad transmisible, tan antigua como el hombre mismo. El universo estuvo constituido por los 103 casos notificados con lepra en la provincia de Las Tunas, en el período de enero de 2003 a diciembre de 2012. La información se obtuvo por las encuestas epidemiológicas existentes en el Departamento de Estadística de la Dirección Provincial de Salud y en el Centro Provincial de Higiene, Epidemiología y Microbiología. Se creó una base de datos en Epinfo versión 3.3.3, donde se tabularon los datos de las encuestas. El análisis de los resultados se expresó en números absolutos, tasas y porcentajes para su mejor interpretación, obteniéndose como resultado que la tasa de detección de casos tiene un comportamiento irregular, el año de mayor incidencia fue el 2009, con 20 casos. Se notificaron tres casos de lepra infantil; las formas paucibacilares representaron el 51,5%; el modo de detección más frecuente fue el espontáneo. Existe transmisión activa y todo ello puede ser reflejo de la ausencia de un trabajo consolidado en el programa de control de la enfermedad

  11. Integrazione tra Database Topografico e mappa catastale: un progetto sperimentale in provincia di Brescia

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    Franco Guzzetti

    2011-04-01

    Full Text Available Il Geoportale della Provincia di Treviso, vincitore anch'esso del Premio Geoportali d'Italia 2009, nasce come uno strumento di consultazione, scambio e cessione dei dati che si muove all'interno di un unico riferimentonormativo: la direttiva INSPIRE. Tutto ciò in un contesto dove l'utilizzo di software Open Source ha permesso unsignificativo risparmio garantendo comunque il soddisfacimento delle esigenze di pubblicazione e di integrazione con le dotazioni del Sistema Informativo Territoriale.Integration of topographical and cadastral map database:an experimental project in Brescia, ItalyThe  new  requirements  of  the  Public  Administration  and  the Agenzia  del  Territorio  converge  in  search  of  an  increasingly high level of synergy in the data exchange and interoperabil-ity  in  updating  and  management  of  spatial  databases.  The Carta Unica (DB Topographic - Land Registry is a candidate as an ultimate goal of this techno-cultural path. The Servizio Cartografico and GIS in the Province of Brescia, in collabora-tion with the Politecnico di Milano, conducted an experiment aimed at establishing a procedure that could lead to interac-tion of the information of the DB Topographical-Catasto and laying the foundations for the birth of the Carta Unica. The ex-periment was conducted in the Municipality of Collebeato.

  12. Composición corporal en escolares de la provincia de Catamarca, Argentina

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    Lomaglio, Delia Beatriz

    2005-01-01

    Full Text Available Por primera vez se estimó la composición corporal de niños en edad escolar de la provincia de Catamarca, utilizando las ecuaciones propuestas por Gurney y Jellife (1973, Siri (1961 y Slaughter et al (1988 fundamentadas en la estima de la densidad corporal y los pliegues adiposos subcutáneos. También se calcularon otros parámetros nutricionales como el IMC y diversas relaciones que reflejan la distribución del perfil de grasa. La muestra fue de 5497 niños y niñas entre 5 y 15 años de edad, de siete departamentos provinciales. Las mediciones fueron realizadas entre 1980 y 2000, lo que facilitó, además, un análisis secular de la variabilidad de los parámetros estudiados. Los resultados obtenidos se han contrastado con los correspondientes a otros grupos humanos previamente estudiados con idéntica metodología. Por lo que respecta en concreto al sobrepeso y obesidad calculado a partir de los criterios de Cole et al (2000 cabe mencionar que la prevalencia de ambas condiciones malnutritivas es considerablemente inferior a la registrada hasta el momento para la mayoría de los países latinoamericanos utilizando protocolos basados en el IMC. Concretamente la proporción actual es en Catamarca de un 7% de sobrepeso y un 2% de obesidad, habiéndose observado que la tendencia secular al aumento de ambas condiciones, ha sido muy leve en los últimos veinte años.

  13. Almacenamiento del carbono en varios suelos cultivados con cacao en la provincia El Oro-Ecuador

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    Dr. C. Salomón Barrezueta-Unda

    2018-04-01

    Full Text Available Con el objetivo de estimar la variabilidad de carbono almacenado en suelos cultivados de cacao en la parte baja de la provincia El Oro, fueron seleccionadas al azar 30 parcelas cultivadas con cacao del tipo Nacional (n=12 tomado como modelo agrofestal y del clon de cacao CCN51 (n=18 como modelo en monocultivo, para lo cual se conformaron transeptos de 30 x 15 metros en el centro de cada parcela de donde se tomaron muestras de suelo a una profundidad de 0-30 cm a las que realizaron análisis de arena, limo y arcilla por Bouyucos, densidad aparente (Da por el método del cilindro, pH relación 1:25 con lectura en potenciómetro en laboratorio, Capacidad de intercambio catiónico (CIC con acetato de amonio pH 7, nitrógeno (N y carbono (C en un analizador elemental. Para cuantificar la cantidad de C almacenado se utilizó la profundidad del muestreo, la Da para determinar el volumen del suelo, el cual se multiplica por el C orgánico. Los resultados mostraron un predominio de la arena (>39% y el limo (>30%, con poca variabilidad en la Da con medias de 1,37 g-1 m3. La CIC fue superior en los cultivares de Nacional con 35,25 cmol (+ kg-1 al determinado en CCN51 (27,34 cmol (+ kg-1, al igual que el C orgánico (2,2% y N (0,20%. Los niveles de C almacenados fueron de 33,096 Mg de C ha-1 en CCN51 y 45,555 Mg de C ha-1 en Nacional, sin existir diferencias significativas (p=0,117. Palabras clave: Cacao Nacional, CCN51, carbono orgánico, densidad aparente.

  14. Leishmaniosis tegumentaria en Las Lomitas, Provincia de Formosa, Argentina, 1992-2001

    Directory of Open Access Journals (Sweden)

    O. D. Salomón

    2002-12-01

    Full Text Available Entre 1992 y el 2001 el hospital de Las Lomitas notificó 85 casos de leishmaniosis tegumentaria, 72.9% en hombres, 91.8% en mayores de 10 años, y el 10.5% con manifestación mucosa. La presentación clínica más frecuente fue la úlcera simple en miembros inferiores. Las características epidemiológicas y clínicas fueron compatibles con la infección debida a Leishmania (Viannia braziliensis. La distribución anual de aparición de lesiones fue bimodal, la abundancia mostró asociación con el caudal del río Bermejo y la precipitación pluvial del año anterior. La intradermorreacción y la anamnesis sugieren como principal actividad de riesgo la pesca en el río. Se colectaron 1018 Phlebotominae, Lutzomyia neivai (97.1%, L. migonei (2.3% y L. cortelezzii (0.6%, la proporción peridomicilio/bosque en galería del río Bermejo fue 1/9, en composición semejante a las poblaciones del mismo río en la provincia de Salta. El incremento de casos observado desde 1992, la ejecución de obras de desarrollo que implican cambios ambientales, y la potencialidad de instalación de un ciclo periurbano vuelven necesario implementar un programa de vigilancia activa entomológica y de casos en el área chaqueña.

  15. Comportamiento de la retinopatía de la prematuridad en la provincia La Habana

    Directory of Open Access Journals (Sweden)

    Olga Lidia Baños Carmona

    Full Text Available Objetivo: evaluar el comportamiento de la retinopatía de la prematuridad en los nacidos con menos de 1 750 g o menos de 35 semanas de gestación. Métodos: se realizó un estudio retrospectivo, observacional, descriptivo en el período comprendido de enero de 2005 a septiembre de 2010, en los servicios de neonatología de la provincia La Habana. Se estudió el total de recién nacidos vivos (207 con menos de 35 semanas de edad gestacional y un peso inferior a 1 750 g al nacer ingresados en las unidades de cuidados intensivos neonatales de este territorio. Resultados: el 42,8 % correspondió con los nacidos entre las semanas 33 y 34,6, y un 42,8 % con un peso entre 1 250 y 1 499 g. El 89,8 % de los recién nacidos presentaron una retina inmadura y un 10,1 % desarrolló retinopatía de la prematuridad. El 88,8 % de los tratados con láser evolucionaron favorablemente. Conclusiones: la retinopatía de la prematuridad ha disminuido en los últimos años a pesar de que existe un incremento en el bajo peso al nacer y prematurez. La edad gestacional menor de 34,6 semanas, el peso al nacer menor de 1 500 g y el síndrome de dificultad respiratoria fueron los factores más importante en la aparición de la retinopatía. Con el diagnóstico precoz de la enfermedad se trató oportunamente, logrando disminuir las secuelas y mejoría de la calidad de vida.

  16. Factores operacionales que incrementan los accidente fatales por caída de rocas en la provincia de Yauli - 2009

    OpenAIRE

    Huamán Fernández, Juan Antonio

    2011-01-01

    Dentro de la labor de consultor y gerenciamiento en el nivel intermedio respecto, a la estructura organizacional de una empresa minera, surgió como criterio la innovación de los procesos y un nuevo enfoque en la administración de la mina, relacionado al control de riesgo. La tesis “FACTORES OPERACIONALES QUE INCREMENTAN LOS ACCIDENTES FATALES POR CAÍDA DE ROCAS EN LA PROVINCIA DE YAULI - 2009”, surge a raíz del cuestionamiento por la toma de decisión realizada como responsable del área de...

  17. Lineamientos elementales de la acción originaria de inconstitucionalidad en la provincia de Buenos Aires

    OpenAIRE

    Flores, Álvaro

    2017-01-01

    La acción originaria de inconstitucionalidad se erige como una de las herramientas procesales que posee el Sistema Constitucional Bonaerense, para el ejercicio del control de constitucionalidad. Esta acción —contemplada en el artículo 161 inc. 1 de la Constitución Bonaerense— permite a la Suprema Corte de la Provincia de Buenos Aires —en forma directa y originaria— expedirse acerca de la constitucionalidad de leyes, decretos, ordenanzas y todo tipo de norma que constituya un mandato abstracto...

  18. Brote de enfermedad transmitida por alimentos en el distrito de Catache, provincia de Santa Cruz, departamento de Cajamarca. Abril 2007

    OpenAIRE

    Suarez, Victor

    2007-01-01

    De acuerdo con la información proporcionada por la Dirección de Epidemiología de la DIRESA Cajamarca, durante la primera semana de abril se ha producido un brote de una enfermedad transmitida por alimentos en el distrito de Catache, provincia de Santa Cruz, departamento de Cajamarca, con 49 casos. Los primeros casos se presentaron el 3 de abril y los últimos seis casos fueron atendidos en el C.S. Catache el día 9 de abril. El 100% de los casos presentaron nauseas, 85,7% vómitos y 75,5% cef...

  19. Análisis Estructural de Fallas Geológicas y Potenciales Deslizamientos en Anconcito, Provincia de Santa Elena

    OpenAIRE

    Kervin Chunga

    2015-01-01

    El sector costero de Anconcito, localizado al suroeste de la provincia de Santa Elena, es afectado por fenómenos geológicosinducidos por la dinámica costera de la zona de estudio: (1) socavamiento de los acantilados causado por la dinámica de la erosión marina y posterior derrumbe de estratos rocosos, y (2) deslizamientos de estratos rocosos a través de planos lístricosde fallas geológicas de tipo normal con componentes de desplazamientos laterales dextrales. El análisis estructural permitió ...

  20. Conflictos sociales y desarrollo local: distrito de Chamaca, provincia de Chumbivilcas, región de Cusco 2013-2014

    OpenAIRE

    Ormachea Cayllahua, Franklin Rene

    2015-01-01

    El conflicto social, es un síntoma de la visión prospectiva hacia el desarrollo de la población y con ello el equilibrio general y bienestar social, por ello la inquietud de investigar los conflictos sociales y el desarrollo Local en el Distrito de Chamaca, Provincia de Chumbivilcas, Región de Cusco en el periodo de 2013 – 2014, población que presenta necesidades básicas insatisfechas, deficiente conocimiento de la administración pública y sus procedimientos administrativos, restricción presu...

  1. Antecedentes históricos sobre el Complejo Forestal y Maderero Panguipulli, provincia de Valdivia, Centro-sur de Chile

    OpenAIRE

    Barrena Ruiz, José; Hernando Arrese, Maite; Rojas Marchini, Fernanda

    2016-01-01

    El Complejo Forestal y Maderero Panguipulli, empresa surgida en 1971 en la provincia de Valdivia, administró un área superior a 400.000 ha y empleó a más de 3.000 trabajadores bajo un esquema de comanejo entre obreros y Estado. El objetivo fue indagar en los procesos sociales que influyeron en la conformación de esta empresa. Se desarrolló una revisión bibliográfica que incluyó artículos científicos, trabajos de tesis, informes y libros. Adicionalmente, se realizaron dos entrevistas en profun...

  2. Experiencias con Bombas de Mecate en tres escuelas del Subdepartamento de Bengbis, Provincia del Sur, Camerún

    OpenAIRE

    Burbano, Helena; Rebollo, Loreto; Cacho, José Luis; Vadillo, Pedro Luis; Martínez de Guzmán, Miguel; Figuera, Guillermo de la; García García, Rubén

    2014-01-01

    ResumenLa ONGD Zerca y Lejos ha implementado e introducido la tecnología Bomba de Mecate en los pozos de tres escuelas del Subdepartamento de Bengbis, en la Provincia del Sur de Camerún, frente a tecnologías más inaccesibles y más extendidas en la zona, como es la bomba de embolo, India Mark, que dificultan que la población tenga acceso continuo al agua segura, por falta de recursos, principalmente económicos. La sencillez de su fabricación ha permitido al equipo construirla en terreno con la...

  3. Registro de un ejemplar de Trachemys scripta elegans (Wied 1839) en la provincia de Jujuy, Argentina

    OpenAIRE

    Quiroga, María Fernanda; González Baffa Trasci, Noelia; Akmentins, Mauricio

    2015-01-01

    La tortuga de orejas rojas (Trachemys scripta elegans) es originaria del centro este de los Estados Unidos y noreste de México (Ernst, 1990), pero debido al comercio internacional de animales silvestres se ha convertido en un invasor biológico a nivel global. En Argentina, Trachemys scripta elegans ha sido reportada para dos localidades en la provincia de Buenos Aires y en ambos casos se trató del registro de individuos aislados, por lo que se desconoce si la tortuga de orejas rojas ha lograd...

  4. Herpetofauna de la provincia de San Juan, Argentina: lista comentada y distribución geográfica

    OpenAIRE

    Ávila, Luciano Javier; Acosta, Juan Carlos; Murúa, Fernando

    1998-01-01

    El conocimiento de la fauna de anfibios y reptiles de la Provincia de San Juan es fragmentario e incompleto. En razón de ello, el objetivo de este trabajo es presentar una lista de las especies de anfibios y reptiles registrados para San Juan. La información se relevó a partir de la revisión de colecciones de referencia y a partir de revisiones bibliográficas. Se establece un registro de 59 especies y se presentan las localidades de colección de las mismas. The knowledge of amphibians and ...

  5. La propiedad rústica en la provincia de Jaén: el solar forestal público

    Directory of Open Access Journals (Sweden)

    José Domingo Sánchez Martínez

    2000-01-01

    Full Text Available Se explica el origen, la evolución y la tipología de los montes sujetos a propiedad y/o gestión pública en la provincia de Jaén, diferenciando tres grandes ámbitos forestales que se desarrollan en las periferias montañosas meridional, oriental y septentrional. Se relaciona la sucesión de diferentes fases de la política forestal española del último siglo y medio con el tratamiento concedido en cada momento a las cuestiones patrimoniales.

  6. El status actual de las ecoescuelas: el caso de la provincia de Granada (España)

    OpenAIRE

    Perales-Palacios, F. J.; Burgos-Peredo, O.; Gutiérrez-Pérez, J.

    2013-01-01

    La preocupación progresiva por la sostenibilidad de las organizaciones sociales representa hoy un factor de calidad de la madurez institucional de un país. Las ecoauditorías ambientales son un ejemplo de buenas prácticas ambientales en los centros educativos. En esta comunicación se analiza la aplicación de estas metodologías al campo de la planificación y gestión escolar. La implantación del Programa a 21 ecoescuelas de la Provincia de Granada se evalúa mediante un diseño de investigación cu...

  7. El status actual de las ecoescuelas : el caso de la provincia de Granada (España)

    OpenAIRE

    Perales Palacios, F. Javier

    2013-01-01

    La preocupación progresiva por la sostenibilidad de las organizaciones sociales representa hoy un factor de calidad de la madurez institucional de un país. Las ecoauditorías ambientales son un ejemplo de buenas prácticas ambientales en los centros educativos. En esta comunicación se analiza la aplicación de estas metodologías al campo de la planificación y gestión escolar. La implantación del Programa a 21 ecoescuelas de la Provincia de Granada se evalúa mediante un diseño de investigación cu...

  8. Caracterización del subsector calzado de la provincia de Tungurahua período 2010 - 2012

    OpenAIRE

    González Garcés, Liliana Elizabeth

    2015-01-01

    1.Aspectos introductorios.-- 2.Marco Teórico.-- 3.Metodología.-- 4.Caracterización del subsector calzado de la provincia de Tungurahua período 2010 -2012.-- 5.--Propuesta La actividad manufacturera del calzado se ha convertido en uno de los subsectores que más aporta a la economía del país, además es considerada por el Ministerio de Coordinación de la Producción, Empleo y Competitividad y el Gobierno Provincial de Tungurahua como actividad priorizada en la agenda de transformación de la ma...

  9. Caudal ecológico del río Chambas en la provincia Ciego de Ávila

    OpenAIRE

    Brown Manrique, Oscar; Gallardo Ballat, Yurisbel; Williams Harriote, Patricio W.; Torres Martínez, Yuneisi

    2016-01-01

    La investigación se desarrolló en el río Chambas de la provincia Ciego de Ávila con el objetivo de determinar el caudal ecológico mediante cinco metodologías: Curva de Permanencia de Caudales, Rafael Heras, Tennant, Franquet y Perímetro Mojado. Se analizó una serie de 21 años de gastos medios mensuales en el periodo comprendido de 1976 al 1986, obtenidos de la estación hidrométrica Puente Circuito Norte. Los principales resultados demostraron que los caudales promedios del río Chambas present...

  10. Estudio del ambiente empresarial transfronterizo entre las regiones del Alentejo (Portugal) y la Provincia de Huelva (España)

    OpenAIRE

    Plaza Mejía, María de los Ángeles; Vargas Sánchez, Alfonso; Sousa, António; Novas, Jorge

    2011-01-01

    En este estudio se ha analizado la evolución del comercio exterior y se han determinado los sectores en los que se mantienen relaciones comerciales transfronterizas regulares entre la provincia de Huelva y la región del Alentejo, así como las empresas que las llevan a cabo, siendo estas actividades económicas, por tanto, las que ofrecen más posibilidades de una cooperación empresarial efectiva. En este sentido, se identifican toda una serie de elementos ligados a la cooperación, siendo analiz...

  11. PLANTAS ALIMENTICIAS, MEDICINALES Y BIOCIDAS DE LAS COMUNIDADES DE MUÑANI Y SUATIA, PROVINCIA DE LAMPA (PUNO – PERÚ)

    OpenAIRE

    Pauro R., Juan J.; Universidad Nacional del Altiplano (Perú).; Gonzáles M., Florencio; Universidad Nacional del Altiplano (Perú).; Gamarra C., Brenda M.; Universidad Nacional de San Agustín (Perú).; Pauro R., Joissy R.; Universidad Nacional del Altiplano (Perú).; Mamani M., Fredy; Universidad Nacional del Altiplano (Perú).; B. Huerta, Ricardo; Universidad Nacional del Altiplano (Perú).

    2011-01-01

    Este trabajo de investigación fue desarrollado durante noviembre y diciembre de 2004 y entre enero y marzo de 2005, en las comunidades de Muñani (Región natural Suni) y Suatía (Región natural Puna) de la provincia de Lampa, Región Puno. El objetivo fue determinar las especies vegetales y el uso alimenticio, medicinal y biocida en ambas comunidades. Para determinar la riqueza se aplicaron cuadrantes de 1 m2 al azar y para determinar su uso, se realizó entrevistas a los pobladores de mayor de e...

  12. Pasión y honor. elementos culturales del homicidio en la provincia de Soto (Santander) de 1903 a 1930

    OpenAIRE

    Jairo Antonio Melo Flórez

    2010-01-01

    Este artículo relaciona algunos elementos culturales de los conflictos interpersonales como son aquellos enmarcados en los conceptos de honor y pasión, entendiéndolos como sentimientos que adquieren sentido en las relaciones sociales, y que se pueden evidenciar en los casos de homicidio en la Provincia de Soto entre 1903 y 1930. El honor por lo general ha sido tratado desde la perspectiva de los hombres honorables, pero también existe una forma de honor en las personas del común, en un sentid...

  13. La Biblioteca Virtual de Salud de la provincia Holguín: un diagnóstico preliminar

    OpenAIRE

    Cañedo Andalia, Rubén; Santiesteban Santiesteban, Mirtha; Sao Avilés, Augusto; Ríos Hidalgo, Nancy; Torres Acosta, Rafael; Díaz Ricardo, Oscar; Rojas García, Yaima; Montejo Castells, Marilis; La O Zaldívar, Juana; Peña Rodríguez, Karen

    2003-01-01

    Con el objetivo de iniciar el desarrollo de la Biblioteca Virtual de Salud de la provincia Holguín, se realizó un diagnóstico preliminar de las condiciones existentes en el territorio para su implementación. Se exponen los conceptos fundamentales relacionados con la biblioteca virtual, se identifican las instituciones con mayor potencial científico en el área, así como los productos y servicios de información con condiciones para trasladarse a un entorno de red. Se establece una estrategia pa...

  14. Escenario de la presencia italiana en La Plata : El edificio del Banco de la provincia de Buenos Aires como objeto de análisis

    OpenAIRE

    Carbonari, Fabiana Andrea; Grandis, María Belén de

    2015-01-01

    El presente artículo se inscribe en el plan de trabajo de la Beca Interna de Entrenamiento en Investigación de la FAU denominada Italianos en la ciudad de La Plata. El caso del Banco Provincia de la ciudad de La Plata que, durante el ciclo lectivo 2015 desarrolla la Arq. María Belén de Grandis con dirección de la Esp. Arq. Fabiana Carbonari. La misma tiene por objetivo realizar el estudio histórico sistemático del Banco de la Provincia de Buenos Aires. En ese sentido, propone analizar las tra...

  15. Impacto de la sequía sobre algunos indicadores bioproductivos de empresas ganaderas en la provincia de Sancti Spiritus (Impact of the

    OpenAIRE

    Dr. M.V. Sergio R. Vargas Blanco, MSc*. y Dr. C. Omelio Cepero Rodríguez.

    2006-01-01

    RESUMENLa ocurrencia de eventos de sequíassignificativas en la provincia de SanctiSpiritus en los últimos años ha motivado lanecesidad de abordar la evaluación de susimpactos sobre el sector ganadero basado encriterios cuantitativos a fin de contar conapreciaciones objetivas sobre el tema.Para la ejecución de este trabajo fueronrecopilados los acumulados mensuales de lasprecipitaciones ocurridas en los 8 municipiosde la provincia de Sancti Spiritus en unperiodo de 5 años para evaluar los efec...

  16. Aporte a la geología del Alto de Mogna, al norte de la depresión del Tulum, provincia de San Juan

    OpenAIRE

    J.J. Zambrano; G. Suvires

    2005-01-01

    El Alto de Mogna, elevación estructural situada en la parte central de la provincia de San Juan, entre las provincias geológicas de las Sierras Pampeanas y la Precordillera Oriental, tiene rumbo este-oeste, transversal a las estructuras de las mencionadas cadenas montañosas, y separa dos depresiones tectónicas regionales: el valle del Bermejo, al norte, y la depresión de Tulum, al sur. En esta elevación estructural afloran fallas y pliegues, cuyo rumbo es prácticamente este-oeste, salvo en la...

  17. Factores que influencian la práctica de la actividad física en la población adolescente de la provincia de Huesca

    OpenAIRE

    José Ramón Serra Puya

    2009-01-01

    El objeto de este estudio fue el de conocer y analizar los niveles de actividad física habitual de una muestra representativa de alumnos y alumnas de secundaria obligatoria de institutos de la provincia de Huesca, así como identificar los factores que pueden influenciar la realización de actividad física, las principales barreras percibidas y determinar el estado de cambio en el que se encuentran los sujetos. La muestra la formaron 831 sujetos de entre todos los institutos de la provincia de ...

  18. Factores que influencian la práctica de la actividad física en la población adolescente de la provincia de Huesca

    OpenAIRE

    Serra Puyal, José Ramón; Generelo Lanaspa, Eduardo; Zaragoza Casterad, Javier

    2008-01-01

    El objeto de este estudio fue el de conocer y analizar los niveles de actividad física habitual de una muestra representativa de alumnos y alumnas de secundaria obligatoria de institutos de la provincia de Huesca, así como identificar los factores que pueden influenciar la realización de actividad física, las principales barreras percibidas y determinar el estado de cambio en el que se encuentran los sujetos. La muestra la formaron 831 sujetos de entre todos los institutos de la provincia de ...

  19. Distribution of Cd, Pb and Cu between dissolved fraction, inorganic particulate and phytoplankton in seawater of Terra Nova Bay (Ross Sea, Antarctica) during austral summer 2011-12.

    Science.gov (United States)

    Illuminati, S; Annibaldi, A; Romagnoli, T; Libani, G; Antonucci, M; Scarponi, G; Totti, C; Truzzi, C

    2017-10-01

    During the austral summer 2011-2012, the metal quotas of Cd, Pb and Cu in the phytoplankton of Terra Nova Bay (TNB, Antarctica) were measured for the first time. Evolution of all the three metal distributions between dissolved and particulate fractions during the season was also evaluated. Metal concentrations were mainly affected by the dynamic of the pack ice melting and phytoplankton activity. In mid-December when TNB area was covered by a thick pack ice layer and phytoplankton activity was very low, all the three metals were present mainly in their dissolved species. When the pack ice started to melt and the water column characteristics became ideal (i.e. moderate stratification, ice free area), the phytoplankton bloom occurred. Cd showed a nutrient-type behaviour with dissolved and particulate fractions mainly influenced by phytoplankton activity. Cd quota showed a mean value of 0.12 ± 0.07 nmol L -1 (30-100% of the total particulate). Also Cu showed a nutrient-type behaviour, with its quota in phytoplankton varying between 0.08 and 2.1 nmol L -1 (20-100% of the total particulate). Pb features the typical distribution of a scavenged element with very low algal content (0.03 ± 0.02 nmol L -1 , representing 20-50% of the total particulate). The vertical distribution of this element was influenced by several factors (e.g. pack ice melting, atmospheric inputs), the phytoplankton activity affecting Pb behaviour only partially. Metal:C ratios provide valuable information on the biological requirements for Cd, Pb and Cu, leading us to better understand their biogeochemical cycles. Copyright © 2017 Elsevier Ltd. All rights reserved.

  20. POTENCIAL DE LA ORGANOGÉNESIS COMO ESTRATEGIA PARA LA MASIFICACIÓN in vitro DE Fitzroya cupressoides EN SUDAMÉRICA AUSTRAL

    Directory of Open Access Journals (Sweden)

    José Vidal Cob-Uicab

    2011-01-01

    Full Text Available Fitzroya cupressoides (alerce es una conífera endémica de Sudamérica austral cuya madera ostenta atributos de belleza y durabilidad. El presente estudio evaluó el efecto de componentes hormonales suplementado con medios de cultivo sobre la capacidad organogénica de Fitzroya cupressoides, y se analizó el proceso de regeneración in vitro mediante estudios histológicos. Se ensayó el medio de cultivo básico Quorin y Lepoivre (QL suplementado con diferentes concentraciones de ácido indol 3-butírico (AIB, 6-bencilaminopurina (BAP y ácido 2,4-diclorofenoxiacético (2,4-D utilizando segmentos nodales y hojas aciculares. Se utilizó un diseño completamente al azar con cinco repeticiones balanceado; la unidad experimental fue un frasco de vidrio conteniendo un explante, y la inducción de callogénesis correspondió a una placa petri con cuatro explantes foliares. Hubo efectos significativos (P = 0.001 del tratamiento sobre las variables respuesta número de brotes y elongación caulinar. La prueba de rangos múltiples de Duncan confirmó que los tratamientos que observaron diferencias significativas fueron 0.1 mg·L-1 de AIB y 1.5 mg·L-1 de BAP para número de brotes por explante y 0.1 mg·L-1 AIB y 1.0 mg·L-1 de BAP para la elongación caulinar. El análisis histológico demostró la proliferación de estructuras meristemáticas a partir de tejido subepidérmico.

  1. Aportes de los "intermediarios culturales" en la conformación de los paisajes fronterizos del norte de la patagonia a fines del siglo XVIII

    Directory of Open Access Journals (Sweden)

    Laura Aylén Enrique

    2012-12-01

    Full Text Available A fines del siglo XVIII la Corona española envió expedicionarios a reconocer el norte de la Patagonia, un territorio dominado por grupos indígenas pero de importancia estratégica para los hispanocriollos. Los funcionarios del Virreinato del Río de la Plata que llevaron a cabo dichas exploraciones registraron sus impresiones en diarios de viaje que analizamos con el objetivo de examinar los modos en que el paisaje norpatagónico fue construido simbólicamente. Consideramos que dicho paisaje se constituyó en base a las luchas desplegadas tanto por hispanocriollos como por indígenas buscando dar sentido al territorio. Sostenemos que, en este contexto, los personajes que se desempeñaban como intérpretes ejercían un rol fundamental en la configuración del territorio, dada la ambigüedad de su posición de intermediarios en las relaciones interétnicas.By late eighteen century the Spanish Crown sent expedition to recognize north Patagonia, a territory dominated by indigenous groups but also of strategic importance to the Hispanic-Creole population. River Plate Viceroyalty officials in charge of the above-mentioned explorations registered their impressions in travel diaries that are thoroughly analyzed in order to discover the ways this landscape of north Patagonia was symbolically constructed. We think this mestizo landscape was the result of struggles maintained between Hispanic-Creoles and natives searching to convey meaning to the territory. Moreover, we state that in this context, the actors who served as interpreters developed a key role in the territorial configuration, given the ambiguity of their position as intermediaries of interethnic relations.

  2. Crecimiento anual de cuatro especies arbóreas con yemas desnudas nativas de los bosques templados húmedos de Patagonia

    OpenAIRE

    Sosa, Claudia M; Puntieri, Javier G

    2016-01-01

    Las especies vegetales que habitan en regiones con bajo nivel de estacionalidad en el clima suelen presentar rasgos morfo-arquitecturales que ocurren con menor frecuencia en especies de regiones con clima estacional. El objetivo de este estudio fue evaluar el crecimiento primario en vivero de cuatro especies leñosas típicas de los bosques templados húmedos de Patagonia, conocidos como selva valdiviana, donde el grado de estacionalidad es menos marcado que en otros bosques patagónicos. Las esp...

  3. Estado actual de las investigaciones tafonómicas naturalistas en Punta Entrada y Monte León (patagonia meridional)

    OpenAIRE

    Muñoz, Sebastián Ramón; Cruz, Isabel

    2017-01-01

    Se presentan los resultados de las investigaciones tafonómicas naturalistas realizadas desde 2005 en la desembocadura del río Santa Cruz y el parque Nacional Monte león (Patagonia Meridional) dirigidas a conocer los modos en que tiene lugar el reciclado de restos de vertebrados en un mismo contexto ambiental, la estepa costera patagónica. Se resume el conocimiento generado sobre: el tiempo involucrado en la desarticulación de carcasas de vertebrados; los procesos y actores intervinientes y ...

  4. The Popular Front elections in the province of Alicante | Las elecciones del Frente Popular en la provincia de Alicante

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    Juan Martínez Leal

    2012-12-01

    Full Text Available The Popular Front elections were the last and most critical one made during the Second Spanish Republic. Confronted the Spanish in two major electoral blocks, these elections were experienced with particular intensity in the province of Alicante, where the Republic had taken deep roots, especially in the industrial towns and in the capital. For the first time, according to the official canvass of the Provincial Electoral Board, results on scrutiny of votes are sorted out by town in order to compose a comprehensive electoral map of the whole province. The Popular Front won the elections in a clear but tight manner, although, above all, it was a democratic and clean process. | Las elecciones del Frente Popular fueron las últimas y más decisivas realizadas durante la Segunda República Española. Confrontados los españoles en dos grandes bloques electorales, estas elecciones se vivieron con una especial intensidad en la provincia de Alicante, donde la República había echado hondas raíces, especialmente en los pueblos industriales y en la capital. Por primera vez, en base al Acta del Escrutinio Oficial de la Junta del Censo Electoral Provincial se recogen los resultados ordenados pueblo a pueblo para componer un completo mapa electoral de toda la provincia. El Frente Popular venció en los comicios de forma clara pero ajustada y, sobre todo, de forma limpia y democrática.

  5. Nuevas citas de Asteraceae para la provincia de Catamarca (Argentina New records of Asteraceae for the province of Catamarca (Argentina

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    Susana E. Freire

    2011-06-01

    Full Text Available Se mencionan los siguientes nuevos registros de Asteráceas para la provincia de Catamarca, Argentina: Baccharis acaulis, B. boliviensis var. latifolia, B. flexuosa, B. glutinosa var. angustissima, B. stenophylla (Tribu Astereae, Eupatorium patens var. tomentosum (Tribu Eupatorieae, Cosmos bipinnatus, C. peucedanifolius var. peucedanifolius, Helianthus annuus (Tribu Heliantheae, Gamochaeta erythractis, G. longipedicellata, Gnaphalium lacteum, Tessaria integrifolia var. integrifolia (Tribu Inuleae, Chuquiraga ruscifolia (Tribu Mutisieae, Senecio crepidifolius, S. subulatus var. subulatus, Xenophyllum incisum var. incisum (Tribu Senecioneae. Se citan además el hábitat de los taxones y las provincias fitogeográficas que integran. Se propone una nueva combinación, Baccharis glutinosa Pers. var. angustissima (DC. Giuliano.The following Asteraceae are mentioned for the province of Catamarca: Baccharis acaulis, B. boliviensis var. latifolia, B. flexuosa, B. glutinosa var. angustissima, B. stenophylla (Tribe Astereae, Eupatorium patens var. tomentosum (Tribe Eupatorieae, Cosmos bipinnatus, C. peucedanifolius var. peucedanifolius, Helianthus annuus (Tribe Heliantheae, Gamochaeta erythractis, G. longipedicellata, Gnaphalium lacteum, Tessaria integrifolia var. integrifolia (Tribe Inuleae, Chuquiraga ruscifolia (Tribe Mutisieae, Senecio crepidifolius, S. subulatus var. subulatus, Xenophyllum incisum var. incisum (Tribe Senecioneae. The habitat and phytogeographic provinces of the taxa are mentioned. The following new combination is proposed: Baccharis glutinosa Pers. var. angustissima (DC. Giuliano.

  6. Efectos de la migración sobre el crecimiento poblacional a largo plazo de las provincias cubanas

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    Daylin Cecilia Rodriguez Javique

    2013-12-01

    Full Text Available Cuba es un país que, además de presentar niveles de fecundidad inferiores al nivel de reemplazo, ha registrado un significativo saldo migratorio negativo. Se observa también un intenso flujo migratorio interno cuyo patrón es muy diferente entre las provincias. Debido a la magnitud de estos flujos migratorios, la migración se presenta como un componente demográfico importante en la dinámica poblacional cubana. De esta forma, el objetivo de este trabajo es estimar el efecto de la migración interna e internacional sobre el potencial de crecimiento a largo plazo de Cuba y de sus provincias. Para esto, calculamos medidas de reproducción y de crecimiento poblacional a partir de los métodos demográficos convencionales y de la metodología propuesta por Preston y Wang (2007, que se basa en los métodos de variable r. Considerando el patrón demográfico corriente, en la mayoría de los territorios de Cuba se observa una reducción substantiva en la capacidad de reposición de las generaciones y en tamaño futuro de la población cuando se consideran los efectos de la migración.

  7. Talento, tecnología y desarrollo económico en las provincias españolas

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    Pedro Casares

    2012-01-01

    Full Text Available En esta investigación se propone, a partir de la teoría económica de las clases creativas de Florida (2002a, un modelo de desarrollo económico regional para el caso de las provincias españolas. Este modelo caracteriza la producción regional como un proceso de tres etapas que envuelve: 1 factores exógenos, como por ejemplo, territorio, amenidades, diversidad y Universidad, que atraen y producen talento; 2 talento que genera producción de innovación y tecnología,y 3 la combinación de factores exógenos junto con el talento, la innovación y la tecnología que generan los diferentes niveles de producción económica regional. Asimismo, se examinan y estudian los factores que delimitan la distribución geográfica del capital humano y de la tecnología entre las provincias españolas. Los datos empleados han sido extraídos fundamentalmente del Censo de Población y Viviendas elaborado por el Instituto Nacional de Estadística (INE.

  8. Arsénico en aguas naturales del sudeste de la provincia de Córdoba, Argentina.

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    Alejo Leopoldo Perez Carrera

    2013-10-01

    Full Text Available En Argentina, existen grandes regiones que por sus características edafoclimáticas, poseen excelentes aptitudes agropecuarias, sin embargo, sufren limitaciones de desarrollo debido a la disponibilidad de agua y la calidad del recurso hídrico disponible. Uno de los elementos químicos presentes en el agua, con mayor impacto sobre la salud humana y animal, es el arsénico. La región afectada, abarca las provincias de Córdoba, La Pampa, Santiago del Estero, San Luis, Santa Fe, Buenos Aires, Chaco, Salta, Tucumán, San Juan y Mendoza. El objetivo de este trabajo es analizar la presencia y distribución del arsénico en agua superficial y subterránea en el sudeste de la provincia de Córdoba, una de las zonas más afectadas de Argentina por la presencia de arsénico en el agua.

  9. La enfermedad de Chagas congenita en la Provincia de Salta, Argentina, años 1980-1997

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    Zaidenberg Mario

    1999-01-01

    Full Text Available Se presenta la experiencia de 18 años en la provincia de Salta en el manejo de recién nacidos con enfermedad de Chagas congénita. Desde distintos ámbitos del sistema provincial de salud, el Hospital Materno-infantil de la ciudad de Salta, hospitales del interior y la atención ambulatoria se detectaron y diagnosticaron 102 recién nacidos (RN y lactantes con infección congénita. Los RN se dividieron en dos grupos mayores, el último subdivido, de acuerdo a la oportunidad diagnóstica. Se describe la metodología diagnóstica, presentación clínica, tratamiento y el seguimiento posterior de los niños tratados. Se analizan las características de la experiencia y se discuten las condiciones específicas del diagnóstico, tratamiento y seguimiento de los niños estudiados. Se describen las recomendaciones empleadas en la provincia en el programa de control de Chagas perinatal así como las conclusiones derivadas de esta experiencia.

  10. Exploring the diversity and antimicrobial potential of marine Actinobacteria from the Comau Fjord in Northern Patagonia, Chile

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    Agustina Undabarrena

    2016-07-01

    Full Text Available Bioprospecting natural products in marine bacteria from fjord environments are attractive due to their unique geographical features. Although Actinobacteria are well known for producing a myriad of bioactive compounds, investigations regarding fjord-derived marine Actinobacteria are scarce. In this study, the diversity and biotechnological potential of Actinobacteria isolated from marine sediments within the Comau fjord, in Northern Chilean Patagonia, were assessed by culture-based approaches. The 16S rRNA gene sequences revealed that members phylogenetically related to the Micrococcaceae, Dermabacteraceae, Brevibacteriaceae, Corynebacteriaceae, Microbacteriaceae, Dietziaceae, Nocardiaceae and Streptomycetaceae families were present at the Comau fjord. A high diversity of cultivable Actinobacteria (10 genera was retrieved by using only five different isolation media. Four isolates belonging to Arthrobacter, Brevibacterium, Corynebacterium and Kocuria genera showed 16S rRNA gene identity <98.7% suggesting that they are novel species. Physiological features such as salt tolerance, artificial sea water requirement, growth temperature, pigmentation and antimicrobial activity were evaluated. Arthrobacter, Brachybacterium, Curtobacterium, Rhodococcus and Streptomyces isolates showed strong inhibition against both Gram-negative Pseudomonas aeruginosa, Escherichia coli and Salmonella enterica and Gram-positive Staphylococcus aureus, Listeria monocytogenes. Antimicrobial activities in Brachybacterium, Curtobacterium and Rhodococcus have been scarcely reported, suggesting that non-mycelial strains are a suitable source of bioactive compounds. In addition, all strains bear at least one of the biosynthetic genes coding for NRPS (91%, PKS I (18% and PKS II (73%.Our results indicate that the Comau fjord is a promising source of novel Actinobacteria with biotechnological potential for producing biologically active compounds.

  11. U-Th and 10Be constraints on sediment recycling in proglacial settings, Lago Buenos Aires, Patagonia

    Science.gov (United States)

    Cogez, Antoine; Herman, Frédéric; Pelt, Éric; Reuschlé, Thierry; Morvan, Gilles; Darvill, Christopher M.; Norton, Kevin P.; Christl, Marcus; Märki, Lena; Chabaux, François

    2018-03-01

    The estimation of sediment transfer times remains a challenge to our understanding of sediment budgets and the relationships between erosion and climate. Uranium (U) and thorium (Th) isotope disequilibria offer a means of more robustly constraining sediment transfer times. Here, we present new uranium and thorium disequilibrium data for a series of nested moraines around Lago Buenos Aires in Argentine Patagonia. The glacial chronology for the area is constrained using in situ cosmogenic 10Be analysis of glacial outwash. Sediment transfer times within the periglacial domain were estimated by comparing the deposition ages of moraines to the theoretical age of sediment production, i.e., the comminution age inferred from U disequilibrium data and recoil loss factor estimates. Our data show first that the classical comminution age approach must include weathering processes accounted for by measuring Th disequilibrium. Second, our combined data suggest that the pre-deposition history of the moraine sediments is not negligible, as evidenced by the large disequilibrium of the youngest moraines despite the equilibrium of the corresponding glacial flour. Monte Carlo simulations suggest that weathering was more intense before the deposition of the moraines and that the transfer time of the fine sediments to the moraines was on the order of 100-200 kyr. Long transfer times could result from a combination of long sediment residence times in the proglacial lake (recurrence time of a glacial cycle) and the remobilization of sediments from moraines deposited during previous glacial cycles. 10Be data suggest that some glacial cycles are absent from the preserved moraine record (seemingly every second cycle), supporting a model of reworking moraines and/or fluctuations in the extent of glacial advances. The chronological pattern is consistent with the U-Th disequilibrium data and the 100-200 kyr transfer time. This long transfer time raises the question of the proportion of freshly

  12. OPTICAL FLOW APPLIED TO TIME-LAPSE IMAGE SERIES TO ESTIMATE GLACIER MOTION IN THE SOUTHERN PATAGONIA ICE FIELD

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    E. Lannutti

    2016-06-01

    Full Text Available In this work, we assessed the feasibility of using optical flow to obtain the motion estimation of a glacier. In general, former investigations used to detect glacier changes involve solutions that require repeated observations which are many times based on extensive field work. Taking into account glaciers are usually located in geographically complex and hard to access areas, deploying time-lapse imaging sensors, optical flow may provide an efficient solution at good spatial and temporal resolution to describe mass motion. Several studies in computer vision and image processing community have used this method to detect large displacements. Therefore, we carried out a test of the proposed Large Displacement Optical Flow method at the Viedma Glacier, located at South Patagonia Icefield, Argentina. We collected monoscopic terrestrial time-lapse imagery, acquired by a calibrated camera at every 24 hour from April 2014 until April 2015. A filter based on temporal correlation and RGB color discretization between the images was applied to minimize errors related to changes in lighting, shadows, clouds and snow. This selection allowed discarding images that do not follow a sequence of similarity. Our results show a flow field in the direction of the glacier movement with acceleration in the terminus. We analyzed the errors between image pairs, and the matching generally appears to be adequate, although some areas show random gross errors related to the presence of changes in lighting. The proposed technique allowed the determination of glacier motion during one year, providing accurate and reliable motion data for subsequent analysis.

  13. Current use of wild plants with edible underground storage organs in a rural population of Patagonia: between tradition and change.

    Science.gov (United States)

    Ochoa, Juan José; Ladio, Ana Haydee

    2015-09-25

    Edible plants with underground storage organs (USOs) are neglected resources. We studied the local ecological knowledge edible plants with (USOs) in rural populations of North-Patagonia in order to establish how people are utilizing these plants. Some aspect of corpus-praxis-cosmos complex associated to the local ecological knowledge was documented and discussed. In addition, variation in this ecological knowledge due to age, gender, family structure, ethnic self-determination was also evaluated. Semi-structured interviews were conducted with 51 inhabitants in order to study the relationship between the current use of plants with USOs and the age, sex, family group composition and ethnic self-identification of interviewees. In addition, the Cultural Importance Index for each species was calculated. The current richness of known species in these populations is a total of 9 plants. Plants with USOs tend to be used more frequently as the age of the interviewee increases. Women and men showed no differences in the average richness of species cited. The interviewees who share their homes with other generations use these plants more frequently than those who live alone. Our results indicate that the interviewees who identified themselves as belonging to the Mapuche people use these plants more frequently. For the Mapuche people, wild plants have constituted material and symbolic resources of great importance in their historical subsistence. In addition, they are currently being redefined as elements which present a connection with ancestral practices, produce a strong relationship with the 'land', and become markers which identify the 'natural' (historical) ways of their people; these are key elements in the current political processes of identity revaluation. This research is valuable to stimulate cultural revival and health promotion programs in the communities with their own local, cultural food.

  14. Origin and evolution of the Laguna Potrok Aike maar (Southern Patagonia, Argentina) as revealed by seismic data

    Science.gov (United States)

    Gebhardt, C.; de Batist, M. A.; Niessen, F.; Anselmetti, F.; Ariztegui, D.; Haberzettl, T.; Ohlendorf, C.; Zolitschka, B.

    2009-12-01

    Seismic reflection and refraction data provide insights into the sedimentary infill and the underlying volcanic structure of Laguna Potrok Aike, a maar lake situated in the Pali Aike Volcanic Field, Southern Patagonia. The lake has a diameter of ~3.5 km, a maximum water depth of ~100 m and a presumed age of ~770 ka. Its sedimentary regime is influenced by climatic and hydrologic conditions related to the Antarctic Circumpolar Current, the Southern Hemispheric Westerlies and sporadic outbreaks of Antarctic polar air masses. Multiproxy environmental reconstructions of the last 16 ka document that this terminal lake is highly sensitive to climate change. Laguna Potrok Aike has recently become a major focus of the International Continental Scientific Drilling Program and was drilled down to 100 m below lake floor in late 2008 within the PASADO project. The sediments are likely to contain a continental record spanning the last ca. 80 kyrs unique in the South American realm. Seismic reflection data show relatively undisturbed, stratified lacustrine sediments at least in the upper ~100 m of the sedimentary infill but are obscured possibly by gas and/or coarser material in larger areas. A model calculated from seismic refraction data reveals a funnel-shaped structure embedded in the sandstone rocks of the surrounding Santa Cruz Formation. This funnel structure is filled by lacustrine sediments of up to 370 m in thickness. These can be separated into two distinct subunits with low acoustic velocities of 1500-1800 m s-1 in the upper subunit pointing at unconsolidated lacustrine muds, and enhanced velocities of 2000-2350 m s-1 in the lower subunit. Below these lacustrine sediments, a unit of probably volcanoclastic origin is observed (>2400 m s-1). This sedimentary succession is well comparable to other well-studied sequences (e.g. Messel and Baruth maars, Germany), confirming phreatomagmatic maar explosions as the origin of Laguna Potrok Aike.

  15. Is the prominent ericoid mycorrhizal fungus Rhizoscyphus ericae absent in the Southern Hemisphere’s Ericaceae? A case study on the diversity of root mycobionts in Gaultheria spp. from northwest Patagonia, Argentina

    Czech Academy of Sciences Publication Activity Database

    Brusone, M. C.; Fontenla, S. B.; Vohník, Martin

    2015-01-01

    Roč. 25, č. 1 (2015), s. 25-40 ISSN 0940-6360 R&D Projects: GA MŠk 7AMB12AR014 Institutional support: RVO:67985939 Keywords : ericoid mycorrhiza * Gaultheria * Patagonia Subject RIV: EF - Botanics Impact factor: 3.252, year: 2015

  16. Calidad percibida por dos poblaciones adscritas a dos centros de salud de la provincia de Cuenca

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    Retamal González Antonio

    2000-01-01

    Full Text Available FUNDAMENTO: Para prestar un servicio de calidad es fundamental conocer la opinión que sobre la misma tienen los usuarios del mismo. El objetivo del presente trabajo es medir y comparar la calidad percibida por dos poblaciones asignadas a dos centros de salud de la provincia de Cuenca. MÉTODO: Se trata de un estudio descriptivo transversal. Las Zonas Básicas de Salud estudiadas han sido el Centro de Salud de Cardenete y Centro de Salud de Motilla del Palancar, ambos del Área de Salud de Cuenca. Se ha hecho un muestreo aleatorio estratificado por cuotas de edad y sexo a partir de la tarjeta sanitaria individual. Se ha medido la calidad percibida con un cuestionario validado y fiable, utilizado anteriormente con fines similares por el Ministerio de Sanidad y Consumo. RESULTADOS: Se analizan un total de 295 encuestas, 147 a varones y 148 a mujeres. La media de edad es de 48,83 años (DE: 18,77 para el Centro de Salud de Motilla, en Centro de Salud de Cardenete es de 61,93 años (DE: 15,17. La media de frecuencias mensuales de visitas para Centro de Salud de MP ha sido de 1,56 (DE: 1,91; esta media para el Centro de Salud de Cardenete ha sido:2,49 (DE: 4,27. La media de frecuencias semanales para el Centro de Salud de MP ha sido: 0,32 (DE: 0,66; para el Centro de Salud de Cardenete ha sido: 0,49 (DE: 1,03. El tiempo de espera en el Centro de Salud de MP ha sido: 10,86 minutos (DE: 8,27; en el Centro de Salud de Cardenete: 7,88 (DE: 4,55. 83,4 % de los usuarios de los dos Centros de Salud de conocen la posibilidad de libre elección de médico de cabecera. Se han encontrado diferencias estadísticamente significativas en 11 de los 21 ítems estudiados sobre calidad percibida de que consta el cuestionario CONCLUSIÓN. Los resultados de los componentes de la atención según el análisis factorial de los ítems de calidad percibida son coincidentes con los resultados de calidad percibida. De los dos grupos de usuarios estudiados, los que perciben

  17. en la provincia de Almería en el año 2005

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    Pilar Barroso García

    2007-01-01

    Full Text Available Fundamento:A pesar de que en España se registran coberturas elevadas de la vacuna de parotiditis siguen notificándose brotes epidémicos de parotiditis. El objetivo de este trabajo es describir un brote notificado en la provincia de Almería en el año 2005 y valorar la afectación en población vacunada. Métodos: Estudio descriptivo de los casos notificados. Variables estudiadas: Zona Básica de Salud, municipio, edad, sexo, tipo de población (autóctona y extranjera, fecha inicio de síntomas, sintomatología, complicaciones, situación vacunal, cepa vacunal y pruebas diagnósticas. Fuentes de información: fichas de declaración de enfermedad, encuestas epidemiológicas, información microbiológica, cartilla de vacunaciones, aplicación informática de vacunas del Distrito y datos demográficos del IEA. Se calcularon tasas por 100.000 habitantes por grupos de edad y tipo de población. Para comparar medias se utilizó la t de Student. Resultados: Se notificaron 145 casos procedentes de 17 municipios. El 63,4% fueron varones. El grupo con mayor incidencia fue el de 10 a 14 años con una tasa de 405 por 100.000. La tasa más alta se dio en población autóctona (128,7. En el 52,4% de los casos se comprobó que habían recibido alguna dosis de vacuna, de ellos 69,7% con dos dosis y el 71,1% alguna cepa de Jeryl Lynn. Se confirmó virus de parotiditis en 43 casos, en 6 se identificó genotipo G1. Conclusiones: Se confirma brote por virus de la parotiditis genotipo G1, con mayor afectación de población autóctona de diferentes grupos de edad. Más de la mitad de los casos fueron personas vacunadas.

  18. Diversidad de anfibios anuros del Parque Nacional El Palmar (Provincia de Entre Ríos, Argentina

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    Guzmán, Atilio

    2012-02-01

    Full Text Available El Parque Nacional El Palmar (PNEP es una importante área protegida de la zona este de la provincia de Entre Ríos, Argentina, creado para conservar uno de los últimos fragmentos de palmera yatay (Butia yatay. En este estudio se examina la biodiversidad de la comunidad de anfibios anuros que habitan tres tipos de ambientes del Parque; el pajonal, el pastizal y la selva en galería. Los muestreos se llevaron a cabo entre los meses de primavera-verano de 2008 y 2009. En total se registraron 16 especies de anfibios para el PNEP, distribuidas en 6 familias y 9 géneros. Entre los tipos de ambientes, el pajonal exhibió la mayor diversidad y riqueza de especies. Las abundancias relativas de las especies fueron equitativas dentro de los tres ambientes y existieron diferencias significativas en la composición de especies entre los mismos, siendo el pajonal y el pastizal los más similares. Este trabajo es un aporte significativo al conocimiento de la herpetofauna del PNEP y una base para estudios futuros sobre historia natural de los anfibios. Así también brinda una herramienta para el manejo y conservación del área protegida. El Palmar National Park (NPEP is an important protected area in the eastern of Entre Rios Province, Argentina. It was created for preserving one of the last fragments of yatay palm (Butia yatay. This study examines the biodiversity of the community of anurans that inhabit three types of environments of the Park, the grassland, the straw zone and the gallery forest. Sampling was conducted between the spring-summer 2008 and 2009. There were found 16 species of amphibians for NPEP, belonging to 6 families and 9 genera. Among the types of environments, the straw zone showed the highest diversity and species richness. The relative abundances of the species were equitative in all three environments and there were significant differences in species composition among them being the grassland and pasture the most similar. This work

  19. ¿Participar para transformar? La experiencia de los presupuestos participativos en la provincia de Barcelona

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    Ismael Blanco Fillola

    2011-05-01

    Full Text Available ¿Qué cabe esperar de los procesos de participación ciudadana en las políticas públicas locales?, ¿Es razonable esperar transformaciones políticas significativas? En este artículo se identifican aquellas condiciones que, a nivel teórico, podemos prever que determinen la capacidad transformadora de la participación ciudadana. Esta discusión teórica da lugar a un marco de evaluación de las prácticas de participación que se aplica al análisis de las 11 experiencias vigentes de presupuestos participativos en la provincia de Barcelona. El análisis pone en evidencia los límites de este tipo de prácticas de participación, los cuales están relacionados con tres factores principales: su posición institucional periférica; el escaso margen de decisión que se concede a la ciudadanía; y la escasa movilización social. Sin embargo, los casos analizados obtienen buenos resultados en dos aspectos importantes: el impacto de las propuestas ciudadanas en la toma de decisiones públicas y la transformación de las actitudes políticas, técnicas y ciudadanas hacia la participación. El marco de evaluación propuesto nos ayuda a identificar ámbitos críticos de mejora de los procesos participativos y de fortalecimiento de su capacidad transformadora. What can we expect from citizen participation processes in local policymaking? Is it reasonable to expect significant political transformations? In this article, we identify the conditions that theoretically determine the transformation capacity of citizen participation. Such theoretical discussion gives place to a framework for the assessment of participative practices, which we use to analyse 11 cases of participatory budgeting in the province of Barcelona. The analysis puts in evidence the limits of this kind of participative practices, which are linked to three main factors: their peripheral institutional position; the scarce decision margin that is given to the citizens; and the lack of

  20. Estado nutricional en dos comunidades Mbyá-Guaraní de la provincia de Misiones

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    Oyhenart, Evelia Edith

    2003-01-01

    Full Text Available La evaluación antropométrica constituye un valiosa herramienta que aporta un cuadro general del estado de salud y nutrición de una población. Como tal, sirve de base para monitorear el bienestar físico de poblaciones que están sufriendo una rápida transición socioeconómica, como es el caso de las poblaciones Amerindias. Se evaluó el estado nutricional en niños y adultos de dos comunidades Mbyá-Guaraní de la provincia de Misiones. Sobre una muestra de 120 individuos de 2 a 60 años de edad se relevaron el peso corporal, estatura total y sentado, circunferencia del brazo y pliegues tricipital y subescapular. Se calcularon además el índice córmico y las áreas muscular y adiposa del brazo. Los datos fueron transformados a puntaje z empleando NHANES I y II. Valores z menores a -2 fueron empleados como puntos de corte para determinar la prevalencia de bajo peso para la talla y baja talla. Los valores z medios en peso, estatura y circunferencia del brazo fueron negativos fluctuando entre 0 y -3. Una situación intermedia se observó en los pliegues subcutáneos cuyos valores z fueron similares a la referencia, mientras que en el índice córmico y el área muscular de mujeres tuvieron valores entre 0 y 2. Los resultados obtenidos confirman los hallados en otras poblaciones Amerindias Sudamericanas donde la prevalencia de baja talla es significativamente superior al bajo peso para la talla (36.7% y 1.8% respectivamente. Las infecciones parasitarias en conjunción con otros factores ambientales que inciden sobre la obtención de recursos nutricionales, pueden ser los factores de mayor incidencia en la baja talla de esta población.

  1. El endemismo por paludismo, lepra, leishmaniosis y leptospirosis en la provincia de Castellón, a mediados del siglo XX : vivencias personales

    OpenAIRE

    Martínez Urrea, José

    2009-01-01

    Discurso de inauguración del curso 2009 de la Reial Acadèmia de Medicina de la Comunitat Valenciana por el Ilmo. Sr. Dr. D. José Martínez Urrea: El endemismo por paludismo, lepra, leishmaniosis y leptospirosis en la provincia de Castellón, a mediados del siglo XX. Vivencias personales.

  2. Cinco proyectos del arquitecto Nicolás de Morales para los planes de repoblación de la provincia de Extremadura (1779

    Directory of Open Access Journals (Sweden)

    Justina Rodríguez García

    1990-01-01

    Full Text Available En la primavera de 1778, don Pedro Rodríguez Campomanes realizó un viaje por la provincia de Extremadura, cuyas impresiones y observaciones recogió en una amplia memoria que presentó al Consejo con el fin de informar a dicho organismo de la situación y estado de estas apartadas tierras.

  3. Transformaciones identitarias de los trabajadores en el marco de creación de un Organismo de Servicios Públicos (Autoridad del Agua de la provincia de Buenos Aires)

    OpenAIRE

    Cóceres, Edgardo Miguel

    2014-01-01

    El objetivo general del presente trabajo busca analizar cuales fueron las transformaciones identitarias de los trabajadores de la ex AGOSBA (Administración General de Obras Sanitarias de la Provincia de Buenos Aires) a partir de los cambios organizacionales sufridos en el proceso de creación de la Autoridad del Agua, en adelante ADA.

  4. Paleomagnetism of Jurassic and Cretaceous rocks in central Patagonia: a key to constrain the timing of rotations during the breakup of southwestern Gondwana?

    Science.gov (United States)

    Geuna, Silvana E.; Somoza, Rubén; Vizán, Haroldo; Figari, Eduardo G.; Rinaldi, Carlos A.

    2000-08-01

    A paleomagnetic study in Jurassic and Cretaceous rocks from the Cañadón Asfalto basin, central Patagonia, indicates the occurrence of about 25-30° clockwise rotation in Upper Jurassic-lowermost Cretaceous rocks, whereas the overlying mid-Cretaceous rocks do not show evidence of rotation. This constrains the tectonic rotation to be related to a major regional unconformity in Patagonia, which in turn seems to be close in time with the early opening of the South Atlantic Ocean. The sense and probably the timing of this rotation are similar to those of other paleomagnetically detected rotations in different areas of southwestern Gondwana, suggesting a possible relationship between these and major tectonic processes related with fragmentation of the supercontinent. On the other hand, the mid-Cretaceous rocks in the region yield a paleopole located at Lat. 87° South, Long. 159° East, A95=3.8°. This pole position is consistent with coeval high-quality paleopoles of other plates when transferred to South American coordinates, implying it is an accurate determination of the Aptian (circa 116 Ma) geomagnetic field in South America.

  5. Respuesta del microfitoplancton a la adición de nitrato y ácido silícico en fiordos de la Patagonia chilena

    Directory of Open Access Journals (Sweden)

    Pamela Labbé-Ibáñez

    2015-03-01

    Full Text Available La Patagonia chilena está experimentando un aumento del uso del suelo y océano costero y el acelerado derretimiento de algunos glaciares, por lo que uno de los escenarios a futuro es que los fiordos adyacentes reciban cantidades variables de agua dulce y nutrientes inorgánicos. Se estudió la respuesta de ensambles de fitoplancton de los fiordos Reloncaví en invierno y Comau en primavera, a la adición de nitrato y ácido silícico en experimentos de microcosmos. Los ensambles fitoplanctónicos estudiados respondieron a la adición de nutrientes con incrementos en la abundancia celular biomasa autotrófica (clorofila-a y cambios en la composición específica, destacando el cambio de dominancia de especies de diatomeas pennadas a céntricas formadoras de cadenas. Estos resultados dan indicios acerca de los factores que afectan a las comunidades microalgales en un escenario de cambio climático e intervención antrópica de los fiordos de la Patagonia Norte.

  6. Spatial distribution of volcanic ash deposits of 2011 Puyehue-Cordón Caulle eruption in Patagonia as measured by a perturbation in NDVI temporal dynamics

    Science.gov (United States)

    Easdale, M. H.; Bruzzone, O.

    2018-03-01

    Volcanic ash fallout is a recurrent environmental disturbance in forests, arid and semi-arid rangelands of Patagonia, South America. The ash deposits over large areas are responsible for several impacts on ecological processes, agricultural production and health of local communities. Public policy decision making needs monitoring information of the affected areas by ash fallout, in order to better orient social, economic and productive aids. The aim of this study was to analyze the spatial distribution of volcanic ash deposits from the eruption of Puyehue-Cordón Caulle in 2011, by identifying a sudden change in the Normalized Difference Vegetation Index (NDVI) temporal dynamics, defined as a perturbation located in the time series. We applied a sparse-wavelet transform using the Basis Pursuit algorithm to NDVI time series obtained from the Moderate Resolution Image Spectroradiometer (MODIS) sensor, to identify perturbations at a pixel level. The spatial distribution of the perturbation promoted by ash deposits in Patagonia was successfully identified and characterized by means of a perturbation in NDVI temporal dynamics. Results are encouraging for the future development of a new platform, in combination with data from forecasting models and tracking of ash cloud trajectories and dispersion, to inform stakeholders to mitigate impact of volcanic ash on agricultural production and to orient public intervention strategies after a volcanic eruption followed by ash fallout over a wide region.

  7. Reptile and rodent parasites in raptor pellets in an archaeological context: the case of Epullán Chica (northwestern Patagonia, Argentina)

    Science.gov (United States)

    Beltrame, María Ornela; Fernández, Fernando Julián; Sardella, Norma Haydeé

    2015-07-01

    Paleoparasitology is the study of parasite remains from archaeological and paleontological sites. Raptor pellets can be used as source for paleoparasitological information in archaeological sites. However, this zooarchaeological material has been scarcely studied. Epullán Chica (ECh) is an archaeological site in northwestern Patagonia. This cave yielded remains from more than 2000 years before present. The aim of this paper was to study the parasite remains found in owl pellets from the archaeological site ECh, and to discuss the paleoparasitological findings in an archaeological context. Twenty two raptor pellets were examined for parasites. The pellets were whole processed by rehydration in a 0.5% water solution of trisodium phosphate, followed by homogenization, filtered and processed by spontaneous sedimentation. Eight out of 22 bird pellets examined were positive for parasites from reptiles and rodents. Representatives of 12 parasite taxa were recorded; nine of this parasitic species were reported for the first time from ancient samples from Patagonia. This is the first time that pellets give evidences of ancient reptile parasites from archaeological contexts. It is noteworthy that Late Holocene hunter-gatherers of the upper Limay River basin, could have been exposed to some of these zoonotic parasites. Future paleoparasitological studies on owl pellets may reflect even more the parasitological diversity of all micromammal and reptile species presents in ancient times.

  8. Primer registro paleoparasitológico de Trichuris SP (nematoda, capilariidae en muestras asociadas a restos humanos del Holoceno tardío de Patagonia septentrional

    Directory of Open Access Journals (Sweden)

    Fugassa, Martín H.

    2009-01-01

    Full Text Available En el marco de los estudios paleoepidemiológicos que se realizan en restos arqueológicos asignados a poblaciones de cazadores-recolectores de Patagonia, este trabajo presenta información novedosa acerca de la presencia de parásitos en muestras de sedimento de las cavidades pélvicas correspondientes a individuos que habitaron la costa norte de Patagonia durante el Holoceno Tardío. Fueron analizados 3 casos de diferente cronología y en dos de ellos, los de menor antigüedad relativa, los resultados fueron positivos para la presencia de Trichuris trichiura. Es interesante mencionar al respecto que para el período que involucra a los dos casos positivos, la información arqueológica registra un proceso de intensificación en el que se explota una mayor diversidad de fauna y se incrementan los artefactos de molienda en los sitios. Entre las posibles causas propuestas para este proceso se encuentran el aumento demográfico y/o el nucleamiento poblacional en espacios favorables que comienzan a saturarse, hecho consistente con la evidencia cultural obtenida al momento y con la presencia de Trichuris sp.

  9. Presence of Arctotherium (Carnivora, Ursidae, Tremarctinae in a pre-cultural level of Baño Nuevo-1 cave (Central Patagonia, Chile

    Directory of Open Access Journals (Sweden)

    López Mendoza, P.

    2015-12-01

    Full Text Available The description of an I3 assigned to Arctotherium sp. obtained from the Baño Nuevo-1 site (Central Patagonia, Chile is presented. The finding was recovered from Layer 5 and it is associated to Macrauchenia sp., Lama guanicoe, Felidae, Camelidae, Equidae and Mylodontidae, within a sterile deposit of cultural material, dated between ca. 13.500 and 11.200 BP. Despite the fact that it is only a single specimen, such finding extends the known distribution for the genus in Chile.Se presenta la descripción de un I3 asignado a Arctotherium sp. proveniente del sitio Baño Nuevo-1 (Patagonia Central, Chile. El hallazgo fue realizado en la Capa 5 y está asociado a restos de Macrauchenia sp., Lama guanicoe, Felidae, Camelidae, Equidae y Mylodontidae dentro de un depósito estéril de material cultural, datado entre los ca. 13.500 y 11.200 años AP. Aunque se trata de un único espécimen, amplía el rango de distribución conocido para este género en Chile.

  10. Incertidumbre jurídica en la ley de la reforma magisterial N° 29944 en los docentes nombrados de la provincia de Huarochirí - Región Lima

    OpenAIRE

    Azañero Sandoval, Fernando

    2015-01-01

    El presente trabajo de investigación titulado "Incertidumbre jurídica en la ley de la reforma magisterial No 29944 en los docentes nombrados de la provincia de Huarochirí, región Lima, fue realizado en la provincia de Huarochirí, departamento de Lima, obteniendo en esta jurisdicción información acerca de los conocimientos básicos de legislación educativos en los docentes de dicha provincia. Los docentes nombrados que laboran en las instituciones educativas en los niveles de educación inicial,...

  11. El mito de pristinidad y los usos efectivos del territorio de la región de Magallanes, Patagonia Chilena: Forestal, minería y acuicultura

    OpenAIRE

    Inostroza, Luis

    2015-01-01

    Los métodos de clasificación de usos del suelo en regiones remotas presentan dos serias limitaciones. La primera es la mixtura conceptual de usos con coberturas que no refleja el uso efectivo del territorio. Una segunda limitación es la ausencia de usos importantes como turismo, acuicultura y minería, que imponen importantes presiones sobre territorios frágiles. Este trabajo presenta un método para determinar los usos territoriales en la región de Magallanes en el extremo austral de Chile. Se...

  12. Tungiosis adquirida en la provincia del Chaco, Argentina Tungiasis acquired in Chaco Province, Argentina

    Directory of Open Access Journals (Sweden)

    C. I. Menghi

    2009-09-01

    Full Text Available Una niña de 4 años y su madre concurrieron al Hospital de Clínicas por lesiones de 0,7 cm de diámetro con un centro negro y un halo hiperqueratósico blanquecino, de catorce días de evolución. La niña presentaba estas lesiones en los dedos segundo y cuarto del pie; y la madre en el talón. Como antecedentes figuraban un viaje a la provincia del Chaco y el hábito de caminar descalzas. Se realizó un corte de la lesión, un tratamiento antiséptico y se procedió a su limpieza. El contenido extraído se remitió al laboratorio de Parasitología para el diagnóstico. Al microscopio óptico (100 X se observaron porciones de un artrópodo con numerosos huevos característicos de Tunga penetrans. Las pacientes recibieron antibioticoterapia e inmunización antitetánica. La tungiosis es una parasitosis cutánea originaria de América causada por T. penetrans. En zonas endémicas de este parásito es recomendable la utilización de calzado cerrado para evitar la penetración de la pulga en la piel. Debe sospecharse la presencia de tungiosis ante la aparición de lesiones negruzcas, hiperqueratósicas, principalmente en las zonas sub y periungueales, las plantas, los tobillos o los talones de los pies.A four - year old girl and her mother were assisted at the Hospital de Clínicas for 0.7 cm wide papules with a black central core and a white hyperkeratotic halo of fourteen days of development. The girl presented these lesions on the second and fourth toe of one of her feet, and her mother on the ankle. Among the known antecedents were a trip to Chaco Province and their habit of walking barefooted. After the papule incision, both antiseptic treatment and cleaning of the lesion, were performed. The exudate extracted from the wound was sent to the Parasitology laboratory for diagnosis. With low-power amplification (100 X, portions of an arthropod with numerous characteristic Tunga penetrans eggs were identified. The patients received antibiotic

  13. Sobre la presencia de Teucrium pumilum y Teucrium libanitis (Lamiaceae en la provincia de Valencia

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    Guara, M.

    2010-12-01

    Full Text Available Teucrium pumilum and T. libanitis have been cited from Valencia province (Spain since the middle of the XXth Century from the gypsic soils in the Valle de Ayora-Cofrentes shire. The analysis of specimens and labels is not conclusive; no specimen would certify the presence of any of these taxa. The field identification and their inclusion in a phyotosociological table (relevé by Rivas Goday are the only basis of their presence in the territory in a particular moment of the recent Spanish botanical history. Additionally, the unique herbarium specimen from Valencia, impossible to assign a concrete geographic locality, which was traditionally assigned to T. pumilum by some authors, is actually its congeneric T. carolipaui.Teucrium pumilum y T. libanitis son dos especies que han sido citadas como presentes en la provincia de Valencia desde mediados del siglo XX, para los yesos que afloran en la comarca del Valle de Ayora-Cofrentes. El análisis de las etiquetas de los pliegos de los herbarios no es concluyente; ningún pliego testigo certificaría la presencia de estas especies. La determinación de visu por parte de Rivas Goday, y su inclusión en una tabla de inventarios fitosociológica, son el único fundamento de su existencia en la zona en algún momento determinado de la reciente historia botánica española. Además, para T. pumilum, el pliego de herbario que tradicionalmente se ha asignado a la cita valenciana se trata de una confusión en la determinación por parte de algunos autores con su congénere T. carolipaui, siendo imposible al mismo tiempo asignar una localidad geográfica concreta a este material. [ct] Teucrium pumilum i T. libanitis són dues espècies que han estat citades com a presents a la província de València des de mitjans del segle XX, sobre els guixos que afloren a la comarca de la Vall d’Aiora-Cofrents. L’anàlisi de les etiquetes dels plecs dels herbaris no és concloent; cap plec testimoni certificaria la pres

  14. U–Th and 10Be constraints on sediment recycling in proglacial settings, Lago Buenos Aires, Patagonia

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    A. Cogez

    2018-03-01

    Full Text Available The estimation of sediment transfer times remains a challenge to our understanding of sediment budgets and the relationships between erosion and climate. Uranium (U and thorium (Th isotope disequilibria offer a means of more robustly constraining sediment transfer times. Here, we present new uranium and thorium disequilibrium data for a series of nested moraines around Lago Buenos Aires in Argentine Patagonia. The glacial chronology for the area is constrained using in situ cosmogenic 10Be analysis of glacial outwash. Sediment transfer times within the periglacial domain were estimated by comparing the deposition ages of moraines to the theoretical age of sediment production, i.e., the comminution age inferred from U disequilibrium data and recoil loss factor estimates. Our data show first that the classical comminution age approach must include weathering processes accounted for by measuring Th disequilibrium. Second, our combined data suggest that the pre-deposition history of the moraine sediments is not negligible, as evidenced by the large disequilibrium of the youngest moraines despite the equilibrium of the corresponding glacial flour. Monte Carlo simulations suggest that weathering was more intense before the deposition of the moraines and that the transfer time of the fine sediments to the moraines was on the order of 100–200 kyr. Long transfer times could result from a combination of long sediment residence times in the proglacial lake (recurrence time of a glacial cycle and the remobilization of sediments from moraines deposited during previous glacial cycles. 10Be data suggest that some glacial cycles are absent from the preserved moraine record (seemingly every second cycle, supporting a model of reworking moraines and/or fluctuations in the extent of glacial advances. The chronological pattern is consistent with the U–Th disequilibrium data and the 100–200 kyr transfer time. This long transfer time raises the

  15. Sedimentology and paleoenvironments of the Las Chacritas carbonate paleolake, Cañadón Asfalto Formation (Jurassic), Patagonia, Argentina

    Science.gov (United States)

    Cabaleri, Nora G.; Benavente, Cecilia A.

    2013-02-01

    The Las Chacritas Member is the lower part of the Cañadón Asfalto Formation (Jurassic). The unit is a completely continental limestone succession with volcanic contributions that were deposited during the development of the Cañadón Asfalto Rift Basin (Chubut province, Patagonia, Argentina). A detailed sedimentological analysis was performed in the Fossati depocenter to determine the paleoenvironments that developed in the context of this rift. The Las Chacritas Member represents a carbonate paleolake system with ramp-shaped margins associated with wetlands that were eventually affected by subaerial exposure and pedogenesis. This process is represented by three main subenvironments: a) a lacustrine setting sensu stricto (lacustrine limestone facies association), represented by Mudstones/Wackestones containing porifera spicules (F1), Intraclastic packstones (F6) and Tabular stromatolites (F10) in which deposition and diagenesis were entirely subaqueous; b) a palustrine setting (palustrine limestone facies association) containing Microbial Mudstones (F2), Intraclastic sandy packstone with ostracode remains (F3), Oncolitic packstone (F5), Brecciated limestone (F7) and Nodular-Mottled limestone (F8) representing shallow marginal areas affected by groundwater fluctuations and minor subaerial exposure; and c) a pedogenic paleoenvironment (pedogenic limestone facies association) including Intraclastic limestone (F4) and Packstones containing Microcodium (F9) facies displaying the major features of subaerial exposure, pedogenic diagenesis and the development of paleosols. The fluvial-palustrine-lacustrine succession shows a general shallow upward trend in which contraction-expansion cycles are represented (delimited by exposure and surface erosion). The variations in the successive formations reflect the responses to fluctuations in a combination of two major controls, the tectonic and local climatic variables. The predominance of the palustrine facies associations was

  16. Relative Paleointensity of the Geomagnetic Field 12-20 kyr. From Sediment Cores, Lake Moreno (Patagonia, Argentina)

    Science.gov (United States)

    Gogorza, C. S.; Irurzun, M. A.; Chaparro, M. A.; Lirio, J. M.; Nunez, H.; Sinito, A. M.

    2007-05-01

    , M.A.E. Chaparro, J.M. Lirio, H. Nunez, P.G. Bercoff, A.M. Sinito. Relative paleointensity of the geomagnetic field over the last 21,000 years BP from sediment cores, Lake El Trébol (Patagonia, Argentina). Earth Planet Space. 58: 1323-1332, 2006.

  17. Sapling growth and crown expansion in canopy gaps of Nothofagus pumilio (lenga) forests in Chubut, Patagonia, Argentina

    Energy Technology Data Exchange (ETDEWEB)

    Lopez Bernal, P. M.; Defosse, G. E.; Quinteros, C. P.; Bava, J. O.

    2012-07-01

    In the province of Chubut in Patagonia, Argentina, Nothofagus pumilio forests (locally known as lenga), are managed through selective cuts, which imply the opening of canopy gaps. This management scheme is carried out without taking into consideration the changes of sapling requirements through either a cutting cycle or the precipitation gradient in which these forests thrive. To analyze these changes, we inferred the facilitation-competition balance between the canopy and regeneration, studying the effects of precipitation levels, gap size and gap age on saplings growth in height on 45 canopy gaps artificially created between 1960 and 1993. Results showed that during the first 20 years since gap opening, growth of regeneration is determined by light availability in mesic sites and by water availability in xeric sites. However, differences due to precipitation levels gradually decrease over time. Moreover, in the period between 20 and 35 years after gap opening, in both mesic and xeric sites, growth is limited by light availability. This indicates that in xeric sites, sapling growth requirements shift from a water-dependent situation to a light-dependent situation. The average closing rate of gaps due to lateral growth of bordering trees is high enough so that within the proposed gap size range, gap healing can occur before regeneration reaches the upper stratum. Consequently, in mesic sites gap opening can be done by a single operation that generates gaps with diameters of approximately twice the average height of the canopy (D/H). While in xeric environments, lenga seedling establishment and initial growth require the cover of small gaps, but advanced regeneration requires bigger gaps to reach the canopy. For this reason, gaps should be opened in two stages: the first gaps should be opened with a D/H between 0.8 and 1, and after a cutting cycle of 35 years, these openings should be enlarged to a D/H between 1.5 and 2. The close relationship maintained between the

  18. Influence of precipitation, landscape and hydrogeomorphic lake features on pelagic allochthonous indicators in two connected ultraoligotrophic lakes of North Patagonia

    International Nuclear Information System (INIS)

    Queimaliños, Claudia; Reissig, Mariana; Diéguez, María del Carmen; Arcagni, Marina; Ribeiro Guevara, Sergio; Campbell, Linda; Soto Cárdenas, Carolina; Rapacioli, Raúl

    2012-01-01

    We investigated the terrestrial influence on two chained deep ultraoligotrophic lakes of North Patagonia (Argentina) through the seasonal analysis of two pelagic allochthonous indicators: i) water color, as a proxy of allochthonous dissolved organic matter in lakes; and ii) the color to chlorophyll a ratio (Color:Chla), as an indicator of the relationship between allochthonous and autochthonous carbon pools. We also evaluated the potential transfer pathways of the allochthonous dissolved organic matter into the pelagic food webs of these deep lakes, including the natural zooplankton δ 13 C in the analysis. The dynamics of the allochthonous indicators were related to the precipitation regime, water level fluctuations, and hydrogeomorphic and catchment features of lakes Moreno East and Moreno West. The water color (absorbance at 440 nm) was extremely low ( −1 ) in both lakes regardless of the season. However, precipitation and snowmelt regimes drove the increase and decrease of water color, respectively. A significant positive relationship between the zooplankton bulk δ 13 C with the water color would suggest an input of allochthonous organic carbon into the pelagic consumers. The incorporation of the dissolved allochthonous material into higher trophic levels is likely favored by the bacterivorous behavior of planktonic organisms, mixotrophic flagellates and ciliates, which dominate the pelagic food webs of these Patagonian lakes. Morphometric aspects, mainly the higher water residence time, led to lower values of allochthony in Moreno East compared to Moreno West, probably accentuated by its upper position in the lake chain. Overall, our results suggest that these allochthonous signals can bring insight into the magnitude of the interaction between terrestrial environments and lake ecosystems, even in extremely clear and ultraoligotrophic systems, such as the Andean Patagonian lakes. - Highlights: ► Pelagic allochthonous indicators were detected in two

  19. Influence of precipitation, landscape and hydrogeomorphic lake features on pelagic allochthonous indicators in two connected ultraoligotrophic lakes of North Patagonia

    Energy Technology Data Exchange (ETDEWEB)

    Queimalinos, Claudia, E-mail: queimalinosc@comahue-conicet.gob.ar [Laboratorio de Fotobiologia, Instituto de Investigaciones en Biodiversidad y Medio Ambiente (INIBIOMA, UNComahue-CONICET), Quintral 1250, R8400FRF Bariloche, Rio Negro (Argentina); Reissig, Mariana; Dieguez, Maria del Carmen [Laboratorio de Fotobiologia, Instituto de Investigaciones en Biodiversidad y Medio Ambiente (INIBIOMA, UNComahue-CONICET), Quintral 1250, R8400FRF Bariloche, Rio Negro (Argentina); Arcagni, Marina; Ribeiro Guevara, Sergio [Laboratorio de Analisis por Activacion Neutronica (LAAN), Centro Atomico Bariloche, Comision Nacional de Energia Atomica, Av. Bustillo 9500, R8402AGP Bariloche, Rio Negro (Argentina); Campbell, Linda [School of Environmental Studies, Saint Mary' s University, 923 Robie Street, Halifax, Nova Scotia, Canada B3H-3C3 (Canada); Soto Cardenas, Carolina [Laboratorio de Fotobiologia, Instituto de Investigaciones en Biodiversidad y Medio Ambiente (INIBIOMA, UNComahue-CONICET), Quintral 1250, R8400FRF Bariloche, Rio Negro (Argentina); Rapacioli, Raul [Facultad de Ingenieria, Universidad Nacional del Comahue, Buenos Aires1400, Q8300IBX Neuquen (Argentina); and others

    2012-06-15

    We investigated the terrestrial influence on two chained deep ultraoligotrophic lakes of North Patagonia (Argentina) through the seasonal analysis of two pelagic allochthonous indicators: i) water color, as a proxy of allochthonous dissolved organic matter in lakes; and ii) the color to chlorophyll a ratio (Color:Chla), as an indicator of the relationship between allochthonous and autochthonous carbon pools. We also evaluated the potential transfer pathways of the allochthonous dissolved organic matter into the pelagic food webs of these deep lakes, including the natural zooplankton {delta}{sup 13}C in the analysis. The dynamics of the allochthonous indicators were related to the precipitation regime, water level fluctuations, and hydrogeomorphic and catchment features of lakes Moreno East and Moreno West. The water color (absorbance at 440 nm) was extremely low (< 0.28 m{sup -1}) in both lakes regardless of the season. However, precipitation and snowmelt regimes drove the increase and decrease of water color, respectively. A significant positive relationship between the zooplankton bulk {delta}{sup 13}C with the water color would suggest an input of allochthonous organic carbon into the pelagic consumers. The incorporation of the dissolved allochthonous material into higher trophic levels is likely favored by the bacterivorous behavior of planktonic organisms, mixotrophic flagellates and ciliates, which dominate the pelagic food webs of these Patagonian lakes. Morphometric aspects, mainly the higher water residence time, led to lower values of allochthony in Moreno East compared to Moreno West, probably accentuated by its upper position in the lake chain. Overall, our results suggest that these allochthonous signals can bring insight into the magnitude of the interaction between terrestrial environments and lake ecosystems, even in extremely clear and ultraoligotrophic systems, such as the Andean Patagonian lakes. - Highlights: Black-Right-Pointing-Pointer Pelagic

  20. Postfire encroachment of Fabiana imbricata is real? Assessing changes of shrubland occupation during 40 years in NW Patagonia steppe

    Science.gov (United States)

    Lasaponara, Rosa; Oddi, Facundo; Ghermandi, Luciana

    2014-05-01

    Landscapes are dynamic in space and time, being spatio-temporal processes of particular interest for landscape ecology. In particular, grasslands can change their structure through the expansion of shrubs in the landscape matrix. Shrub encroachment affect biodiversity as well as forage availability that is the key component of the productive use of rangelands. However, despite its recognition as a global problem, knowledge on the rates, dynamics and encroachment patterns is even scarce. For example, although it is generally accepted that fire control shrub encroachment, certain shrubby species could be favored by the occurrence of fire. In northwestern Patagonian steppe, Fabiana imbricata form large monospecific shrublands that are part of the landscape mosaic and its dynamics of regeneration is strongly related to fire. This long-lived shrub (≡ 150 years) is a typical seeder that is killed by fire and recruits seedlings almost exclusively in post-fire, establishing even-age patches. Our objective was to determine whether F. imbricata shrublands have expanded during the last 40 years in a landscape fire prone. The study area corresponds to San Ramon ranch (22,000 ha) located in northwestern Patagonia steppe, Argentina (latitude -41° 04'; longitude -70° 51'). Two distribution maps of the species were made that corresponds to the study area in 1968 and 2011. The 1968 map was elaborated from the digitalization of aerial photographs (1:45000) while the 2011 map was produced with very high resolution satellite images, current aerial photographs and GPS field data. Both maps were loaded into a GIS environment, in which landscape metrics at patch and class level were determined and then compared. From remote sensing and dendroecological techniques, we know that the study area was almost entirely affected by fires during the study period. Therefore, the comparison of both maps allows us to know post-fire changes in the shrublands spatial configuration at the landscape