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Sample records for caribe pinus caribaea

  1. Family Outcrossing Rates of Pinus caribaea Morelet var. caribaea in Seed Orchard and Natural Populations

    Institute of Scientific and Technical Information of China (English)

    2002-01-01

    Family outcrossing rates of Pinus caribaea var. caribaea populations that differed in origin and management were estimated by using isozyme markers. The family outcrossing rates were estimated by (1)fixing the probability of pollen gene frequency (p); (2) allowing pollen gene frequency to vary among families. The estimates of family outcrossing rates for all the populations varied widely among families (clones of the seed orchard), ranging from 0.39 to 2.0. The average family outcrossing rates of both m...

  2. Evaluación de tres métodos para el arrastre de madera en rodales naturales de Pinus caribaea var. caribaea Evaluation of three methods of the log Pinus caribaea skidding in natural set of wheels

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    Fidel Cándano Acosta

    2004-06-01

    Full Text Available El trabajo se realizó en rodales naturales de Pinus caribaea var. caribaea, ubicados en la unidad silvícola San Andrés, La Palma, provincia Pinar del Río. El objetivo de la investigación fue evaluar la eficiencia y los daños causados a la cubierta vegetal del suelo durante la operación de arrastre de madera. Se evaluaron tres métodos: 1 - el arrastre de fustes enteros con yuntas de bueyes hasta los patios de carga; 2 - el arrastre de fustes enteros con tractor hasta los patios de carga; 3 - el arrastre de fustes enteros con yuntas de bueyes hasta las pistas de arrastre y con tractor hasta los patios de carga. El método de arrastre de madera que consistió en la combinación del empleo de animales y de tractor resultó más eficiente y provocó menos alteraciones a la cubierta vegetal del suelo.The work was carried out in natural stand of Pinus caribaea var. caribaea located in San Andrés, Forestry enterprise of La Palma in the Pinar del Río province. The objective was determine which method of wood extraction results more efficient and reduce damages to the soil vegetable. Three method were evaluated: 1- the extraction of tree length with oxen to landing; 2 - the extraction of tree length with tractor to landing; 3 - the extraction of tree length with oxen to short distance and using tractor up to landing places. The method the extraction of tree length with oxen to short distance and using tractor up to landing places, resulted the most efficient and the one which fewer damages on the vegetable cover of the soil.

  3. Micronutrientes no sistema solo-Pinus caribaea Morelet em plantios apresentando amarelecimento das acículas e morte de plantas Micronutrients in the soil-Pinus caribaea Morelet System with yellowing of the needles followed by senescence and death

    OpenAIRE

    Roselene de Queiroz Chaves; Gilberto Fernandes Corrêa

    2003-01-01

    Com o objetivo de contribuir no diagnóstico de causas que têm levado à morte precoce de pinheiros, verificada após amarelecimento e necrose progressiva das acículas, foi desenvolvido este estudo em áreas de cerrado, no oeste de Minas Gerais. Foram comparadas árvores de Pinus caribaea Morelet das variedades caribaea e hondurensis, plantadas entre 1977-82. Em cada local de amostragem coletou-se material de 20 árvores, sendo 10 com acículas amarelecidas e 10 normais. Foram coletados acículas e t...

  4. Ultrastructural study of ectomycorrhizas on Pinus caribaea Morelet. var. hondurensis Barr. & Golf. seedlings Estudo ultraestrutural de ectomicorrizas em plântulas de Pinus caribaea Morelet. var. hondurensis Barr. & Golf.

    OpenAIRE

    Eduardo Gross; Lilian I. Thomazini Casagrande; Flávio Henrique Caetano

    2004-01-01

    The ultrastructure of ectomycorrhizas formed between Pinus caribaea var. hondurensis inoculated with Pisolithus tinctorius (Pers.) Coker & Couch and Telephora terrestris (Ehrenb.) Fr. was analyzed just before the transplant of these seedlings to the field to ascertain if fungi are established in the roots. Ectomycorrhizal fungi formed a well-developed compact mantle in lateral roots. Vacuoles, nuclei and dolipore septa were observed in mantle hyphae and numerous nuclei, endoplasmatic reticulu...

  5. Cost optimization of the system of use of wood in natural forests de Pinus caribaea

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    Fidel Cándano Acosta

    2012-03-01

    Full Text Available The work was carried out in natural forests of Pinus caribaea in areas of the forest company “La Palma” in the province of Pinar del Río in Cuba. The objective of the investigation was to minimize the cost of harvesting by combining the costs of haulage and road and load patio densities. In addition, the study also takes into consideration the interaction of costs of transportation and the thickness and quality of the layer of gravel on the road. The results of the investigation have shown a significant increase in the spacing between roads and load patios with the decrease of US$0.45/m³. It was possible to improve the quality of the layer of gravel on the road without changing the construction costs significantly, which led to a cost reduction of US$1.01/m³. The overall cost considering the new system decreases in US$1.46/m³. Another significant contribution is made by decreasing the impact to the ecosystem once the reduction on road density may reach around 44% in comparison to the current density.

  6. Avaliação de adesivos à base de taninos de Pinus caribaea var. bahamensis e de Acacia mearnsii na fabricação de painéis aglomerados

    OpenAIRE

    Amélia Guimarães Carvalho; Roberto Carlos Costa Lelis; Alexandre Miguel do Nascimento

    2014-01-01

    http://dx.doi.org/10.5902/1980509814588Este trabalho teve por objetivo avaliar os métodos para a extração dos taninos da casca do Pinus caribaea var. bahamensis, assim como verificar a viabilidade técnica de utilização dos taninos da casca de Pinus caribaea var. bahamensis, de Acacia mearnsii, de misturas de taninos de acácia negra e pinus e de misturas do adesivo ureia-formaldeído (UF) com taninos de acácia e pinus na produção de adesivos para aglomerados. As cascas de Pinus caribaea var. ba...

  7. Provenance and family variation of Pinus caribaea var. hondurensis from Guatemala and Honduras, grown in Brazil, Colombia and Venezuela

    OpenAIRE

    Moura Vicente Pongitory Gifoni; Dvorak William Stephen

    2001-01-01

    Pinus caribaea var. hondurensis (Sénécl) Barr. & Golf. is a tropical pine that naturally occurs in lowland areas of Belize, El Salvador, Guatemala, Honduras, Nicaragua, and eastern Mexico. It has been one of the most studied tropical pines and the one with the most commercial importance in Brazil. The objective of this work was to select the best provenances for plantations and best trees in families for the establishment of seed orchards. For that a trial with five provenances and 47 open-po...

  8. Regeneración natural de pino macho (Pinus caribaea Morelet var. caribaea Barret y Golfari para el incremento del índice de boscosidad en el macizo San Felipe-Los Joberos.

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    Pablo Antonio Cabrera Rodríguez

    2015-09-01

    Full Text Available Natural regeneration of pino macho (Pinus caribaea Morelet var. caribaea Barret and Golfari for increasing forest rate in the massive San Felipe-Los Joberos. In this paper the behavior of natural regeneration (RN of the male pine (Pinus caribaea Morelet var. caribaea Barret and Golfari is evaluated as an alternative reforestation of logged areas or affected by forest fires in the San Felipe-LosJoberos hills . For this, a study was conducted for four years (January 2009 to May 2013, in which the deposition of litter, number of seeds in the soil, number of trees / ha; height and mean diameter in the RN was determined, loading seed into the soil, and such as nearby trees isolated adult or adult plantations. Finally the costs incurred by way of planting and analyzed alternative management were evaluated. The results, therefore the number of plants as for its size, which makes it roughly equivalent to adjacent stands from plantations, indicate the effectiveness of this type of reforestation in the area. The economic advantages of natural regeneration on the plantation are shown, making it possible to develop strategies for management of the species in these conditions. Training decision-makers on environmental education is projected to mitigate the effect on forest cover or other environmental impacts while raising the culture for payment of services generated by forest vegetation.

  9. Ultrastructural study of ectomycorrhizas on Pinus caribaea Morelet. var. hondurensis Barr. & Golf. seedlings Estudo ultraestrutural de ectomicorrizas em plântulas de Pinus caribaea Morelet. var. hondurensis Barr. & Golf.

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    Eduardo Gross

    2004-03-01

    Full Text Available The ultrastructure of ectomycorrhizas formed between Pinus caribaea var. hondurensis inoculated with Pisolithus tinctorius (Pers. Coker & Couch and Telephora terrestris (Ehrenb. Fr. was analyzed just before the transplant of these seedlings to the field to ascertain if fungi are established in the roots. Ectomycorrhizal fungi formed a well-developed compact mantle in lateral roots. Vacuoles, nuclei and dolipore septa were observed in mantle hyphae and numerous nuclei, endoplasmatic reticulum and polymorphic mitochondria were frequently located in the cytoplasm of Hartig net hyphae adjacent to plant cortical cells. Highly vacuolated cortical cells contained droplets of electron-dense material, nucleus and some organelles were observed in a narrow region of peripheral cytoplasm. The ectomycorrhizas of P. caribaea var. hondurensis exhibited typical ultrastructural characteristics of a compatible and physiological active association.A ultraestrutura das ectomicorrizas formadas por Pinus caribaea var. hondurensis inoculado com Pisolithus tinctorius (Pers. Coker & Couch e Telephora terrestris (Ehrenb. Fr. foi analisada antes do transplantio dessas mudas para o campo, com o intuito de verificar se o fungo estava estabelecido nas raízes. Os fungos ectomicorrízicos inoculados formaram um manto compacto e bem desenvolvido nas raízes laterais. Nas hifas desse manto foram observados vacúolos, núcleos e septos dolipóricos, enquanto que no citoplasma das hifas da rede de Hartig, que ficam adjacentes às células corticais, foram freqüentemente observados vários núcleos, retículo endoplasmático e mitocôndrias polimórficas. Células corticais altamente vacuolizadas, contendo gotículas de material elétron-denso, apresentaram núcleo e algumas organelas na sua estreita região citoplasmática periférica. As ectomicorrizas de P. caribaea var. hondurensis apresentaram características ultraestruturais de uma associação compatível e

  10. Micronutrientes no sistema solo-Pinus caribaea Morelet em plantios apresentando amarelecimento das acículas e morte de plantas Micronutrients in the soil-Pinus caribaea Morelet System with yellowing of the needles followed by senescence and death

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    Roselene de Queiroz Chaves

    2003-12-01

    Full Text Available Com o objetivo de contribuir no diagnóstico de causas que têm levado à morte precoce de pinheiros, verificada após amarelecimento e necrose progressiva das acículas, foi desenvolvido este estudo em áreas de cerrado, no oeste de Minas Gerais. Foram comparadas árvores de Pinus caribaea Morelet das variedades caribaea e hondurensis, plantadas entre 1977-82. Em cada local de amostragem coletou-se material de 20 árvores, sendo 10 com acículas amarelecidas e 10 normais. Foram coletados acículas e tecidos do xilema e floema de raízes, nos quais foram analisados os teores de Fe, Mn, Zn, Cu e B. A classe de solo dos sítios de estudo é Latossolo Amarelo ácrico típico. As amostras foram coletadas nas profundidades: 0-5, 5-10, 10-20, 20-40, 40-60, 60-80, 80-100, 100-150, 150-200, 200-250 e 250-300 cm, nas quais foram analisados os teores trocáveis de Fe, Mn, Zn, Cu e B. Os teores de Fe, Zn, Cu e B não diferiram significativamente entre acículas verdes e amarelecidas, enquanto os teores de Mn foram significativamente inferiores nestas. Observou-se também que os teores de Mn foram maiores no xilema e menores nas acículas das plantas anormais, ocorrendo o inverso nas plantas normais. Os sintomas visuais, confirmados pelos resultados analíticos, revelam haver deficiência de manganês no sistema solo-planta estudado.This study was carried out to diagnose senescence and death of pine trees (Pinus caribaea Morelet, observed after yellowing and progressive necrosis of the needles in the Brazilian Savanna (Cerrado in Western Minas Gerais, Brazil. The varieties caribaea and hondurensis, planted between 1977 and 1982 were compared. Samples from twenty trees were collected from the three sites studied; ten with yellowing of the needles and ten without symptoms. From each tree, phloem tissue and xylem from root segments and needles were collected and the contents of Fe, Mn, Zn, Cu and B were analyzed. The soil is Yellow Latosol (Typic Acrustox

  11. Carbon stored in forest plantations of Pinus caribaea, Cupressus lusitanica and Eucalyptus deglupta in Cachí Hydroelectric Project

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    Marylin Rojas

    2014-06-01

    Full Text Available Forest plantations are considered the main carbon sinks thought to reduce the impact of climate change. Regarding many species, however, there is a lack of information in order to establish metrics on accumulation of biomass and carbon, principally due to the level of difficulty and the cost of quantification through direct measurement and destructive sampling. In this research, it was evaluated carbon stocks of forest plantations near the dam of hydroelectric project Cachí, which belongs to Instituto Costarricense de Electricidad. 25 unit samples were evaluated along some plantations that contain three different species. 30 Pinus caribacea trees, 14 Cupressus lusitanica and 15 Eucalyptus deglupta were extracted. The biomass was quantified by means of the destructive method. First of all, every component of the tree was weighed separately; then, sampling was obtained in order to determine the dry matter and the carbon fraction. 110 biomass samples from the three species were analyzed in laboratory, including all the components (leaves, branches, shaft, and root. The carbon fraction varied between 47,5 and 48,0 for Pinus caribacea; between 32,6 and 52,7 for Cupressus lusitanica, and beween 36,4 and 50,3% for Eucalyptus deglupta. The stored carbon was 230, 123, and 69 Mg ha-1 in plantations of P. caribaea, C. lusitanica and E. deglupta, respectively. Approximately, 75% of the stored carbon was detected in the shaft.

  12. Optimisation of the manufacturing variables of sawdust pellets from the bark of Pinus caribaea Morelet: Particle size, moisture and pressure

    Energy Technology Data Exchange (ETDEWEB)

    Relova, I.; Leon, M.A. [Universidad de Pinar del Rio, Marti 270 esq, a 27 de Noviembre, Pinar del Rio (Cuba); Vignote, S.; Ambrosio, Y. [Departamento de Economia y Gestion Forestal, Universidad Politecnica de Madrid, Ciudad Universitaria s/n, 28040 Madrid (Spain)

    2009-10-15

    Different variables affect the processes of compacting biomass, and these variables depend on the raw material, such as the type of wood or type of biomass being compacted, its moisture, size, as well as on other aspects relating to the manufacturing process, such as the pressure applied and the temperature reached during compaction. This work analyses the influence of the size of the sawdust particles from the bark of the species Pinus caribaea var. Morelet, which ranges from 0.63 to 2 mm; it had a moisture content in dry basis of 6; 9.5; 13 and 20%; and the force applied in the laboratory was 8000, 12,000, 16,000 and 20,000 N. These values are relatively high given that they do not take into account the heat caused by the matrixes chafing with the material to be compacted, as occurs in industrial processes. The different experimental treatments were processed and statistically analysed using SSPS version 12.0, and Statgraphics version 5.0. Once the data had been tested in the ANOVA and in various comparison tests, it was observed that the results did not show any significant differences between the pellets obtained with forces of 16,000 and 20,000 N, or between pellets obtained with 9.5 and 13% moisture, and that the pellets with higher qualities were obtained from particle sizes of between 1 and 2 mm. (author)

  13. Efecto tóxico de los extractos acuosos de pinus caribaea y halimeda monile en células humanas

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    Marioly Vernhes

    2010-01-01

    Full Text Available Relacionado con la perspectiva farmacológica y/o nutricional que presentan algunas plantas y algas, el uso de estudios preclínicos que evalúan sus efectos tóxicos mutagénico y/o carcinogénico aumenta. Especies pertenecientes al género Pinus y género Halimeda han atraído la atención de especialistas por sus propiedades antioxidantes. El presente trabajo tuvo como objetivo evaluar la toxicidad de los extractos acuosos de Pinus caribaea y Halimeda monile en células humanas. Dos líneas celulares transformadas con fragmento de SV40 fueron usadas como modelo experimental. Las células MRC5 y XP4PA fueron expuestas a diferentes concentraciones de ambos extractos durante 48 horas. El efecto citotóxico de los extractos fue evaluado mediante el ensayo de sobrevivencia clonogénica. Para ambas líneas celulares, el extracto acuoso de P.caribaea fue más tóxico que el extracto acuoso de H.monile. Para P.caribaea, dosis iguales y superiores a 10 ¿g/mL inhibieron la capacidad de formación de colonias en ambos tipos de células. Sin embargo, el efecto tóxico del extracto de H.monile se mostró a partir de las dosis 100 ¿g/mL y 2000 ¿g/mL para las células MRC5 y XP4PA respectivamente.

  14. Prediction of stem biomass of Pinus caribaea growing in the low country wet zone of Sri Lanka

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    SMCUP Subasinghe

    2014-06-01

    Full Text Available Forests are important ecosystems as they reduce the atmospheric CO2 amounts and thereby control the global warming. Estimation of biomass values are vital to determine the carbon contents stored in trees. However, biomass estimation is not an easy task as the trees should be felled or uprooted which are time consuming and expensive procedures. As a solution to this problem, construction of mathematical relationships to predict biomass from easily measurable variables can be used.   The present study attempted to construct a mathematical model to predict the stem biomass of Pinus caribaea using the data collected from a 26 year old plantation located in Yagirala Forest Reserve in the low country wet zone of Sri Lanka. Due to the geographical undulations of this forest, two 0.05 ha sample plots were randomly established in each of valley, slope and ridge-top areas. In order to construct the model, stem wood density values were calculated by using stem core samples extracted at the breast height point. Stem volume was estimated for each tree using Newton’s formula and the stem biomass was then estimated by converting the weight of the known volume of core samples to the weight of the stem volume. Prior to pool the data for model construction, the density variations along the stem and between geographical locations were also tested.   It was attempted to predict the biomass using both dbh and tree height. Apart from the untransformed variables, four biologically acceptable transformations were also used for model construction to obtain the best model. All possible combinations of model structures were fitted to the data. The preliminary model selection for further analysis was done based on higher R2 values and compatibility with the biological reality. Out of those preliminary selected models, the final selection was done using the average model bias and modeling efficiency quantitatively and using standard residual distribution qualitatively

  15. Provenance and family variation of Pinus caribaea var. hondurensis from Guatemala and Honduras, grown in Brazil, Colombia and Venezuela Variação em procedências e famílias de Pinus caribaea var. hondurensis da Guatemala e Honduras, testadas no Brasil, Colômbia e Venezuela

    OpenAIRE

    Vicente Pongitory Gifoni Moura; William Stephen Dvorak

    2001-01-01

    Pinus caribaea var. hondurensis (Sénécl) Barr. & Golf. is a tropical pine that naturally occurs in lowland areas of Belize, El Salvador, Guatemala, Honduras, Nicaragua, and eastern Mexico. It has been one of the most studied tropical pines and the one with the most commercial importance in Brazil. The objective of this work was to select the best provenances for plantations and best trees in families for the establishment of seed orchards. For that a trial with five provenances and 47 open-po...

  16. Tannins extracted starting from residual bark of pinus caribaea morelet like protective of the adn before the damage induced by gamma rays a cellular cultivation of escherichia coli

    International Nuclear Information System (INIS)

    This work was aimed to evaluate genotoxicity and anti genotoxicity activity against rays of the a tannins fraction obtained from barks of Pinus caribaea Morelet, as well as to elucidate the anti genotoxic mechanisms implicated in radioprotection using deferent's approaches as pre- co- and post-irradiation cell treatments with plant extract. The tannins fraction was not genotoxic to E. coli cells in experiments using different exposure times. This extract was anti genotoxic against rays when the cells were pre- or co-treated with this extracts, but not during post-irradiation treatments, suggesting a possibly anti genotoxic action through free radicals scavenging mechanisms. The results are discussed in relation to the chemo preventive and therapeutic potential of the studied plant species

  17. Provenance and family variation of Pinus caribaea var. hondurensis from Guatemala and Honduras, grown in Brazil, Colombia and Venezuela Variação em procedências e famílias de Pinus caribaea var. hondurensis da Guatemala e Honduras, testadas no Brasil, Colômbia e Venezuela

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    Vicente Pongitory Gifoni Moura

    2001-02-01

    Full Text Available Pinus caribaea var. hondurensis (Sénécl Barr. & Golf. is a tropical pine that naturally occurs in lowland areas of Belize, El Salvador, Guatemala, Honduras, Nicaragua, and eastern Mexico. It has been one of the most studied tropical pines and the one with the most commercial importance in Brazil. The objective of this work was to select the best provenances for plantations and best trees in families for the establishment of seed orchards. For that a trial with five provenances and 47 open-pollinated families was planted near Planaltina, Federal District, in the Cerrado Region of Brazil. The provenances tested were Poptun (Guatemala, Gualjoco, Los Limones, El Porvenir and Santa Cruz de Yojoa (Honduras and assessed at 12 years of age. Poptun and Gualjoco had larger volume, and Los Limones and El Porvenir the lowest incidence of forks and foxtails. Individual tree heritabilities for volume, stem form and branch diameter were 0.34, 0.06, and 0.26 respectively. More than 90% of the trees had defects, common in unimproved P. caribaea. Selection criteria for quality traits need to be relaxed in the first generation of breeding to allow for larger genetic gains in productivity. Results from this test compared with P. caribaea var. hondurensis trials in other Brazilian, Colombian and Venezuelan sites suggest that provenance x site and family x site interactions are not as strong as in other pine species.Pinus caribaea var. hondurensis (Sénécl Barr. & Golf. é uma espécie tropical que ocorre naturalmente nas terras baixas de Belize, El Salvador, Guatemala, Honduras, Nicarágua e no leste do México. Esta espécie tem sido uma das mais estudadas entre os pinos tropicais e uma das mais importantes comercialmente no centro e norte do Brasil. O objetivo deste trabalho foi selecionar as melhores procedências para plantios e também as melhores árvores dentro de famílias para o estabelecimento de pomares de semente. Para isso, um experimento com cinco

  18. Soil properties and variability of tracheid dimensions and wood density in Pinus caribaea var. hondurensis Solo, dimensão dos traqueídeos e densidade da madeira em Pinus caribaea var. hondurensis

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    Robson Schaff Corrêa

    2011-06-01

    Full Text Available

    The understanding of wood quality in relation to different forest sites is of fundamental relevance in current timber market. There are only few studies available concerning soil and wood quality of tropical pinots. So, the goal of this work was to characterize tracheid dimensions and wood density of Pinus caribaea var. hondurensis, correlating these variables with soil properties at different sites. Discs were taken at 1.3 m height and comprised two radial samples in each of the four dominant trees removed at four different sites. Measurements for wood density were made from the third to the eleventh year old rings, and the measurement of tracheid dimensions were made in the fourth, eighth and eleventh year sold rings. The soil, collected in the canopy projection area of each tree was analyzed chemically and physically in different layers. The tracheid dimensions and wood density showed stabilization between the eighth and the eleventh years old rings. Moreover, the tracheid dimensions varied between sites and did not present a pattern of variation in relation to soil properties at the different sites.

    doi: 10.4336/2011.pfb.31.66.93

  1. Variação genética, herdabilidades e ganhos na seleção para caracteres de crescimento em teste de progênies de Pinus caribaea var. bahamensis aos 20 anos de idade em Assis−SP. Genetic variation, herdabilities and gains in selection for growth traits in progeny test of Pinus caribaea var. bahamensis at 20 years of age in Assis−SP.

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    José Carlos Molina MAX

    2008-12-01

    Full Text Available O objetivo deste estudo foi estimarparâmetros genéticos para caracteres decrescimento em um teste de progênies de Pinuscaribaea var. bahamensis, aos 20 anos de idade.O teste de progênies foi instalado com sementes depolinização aberta provenientes de 89 árvoresmatrizes de Pinus caribaea var. bahamensis doCentro de Conservação Genética e Melhoramentode Pinheiros Tropicais - CCGMPT. Três progêniestestemunhas da mesma espécie e oito progênies deP. caribaea var. hondurensis, selecionadas emAssis para produção de resina, também foramincluídas no ensaio. O delineamento experimentalutilizado foi o látice triplo, com parcelas de dezplantas. O ensaio foi mensurado aos 20 anos deidade para diâmetro à altura do peito - DAP, alturatotal e volume real. Foram detectadas diferençassignificativas entre progênies para todos oscaracteres. A média dos caracteres para as 89progênies foi menor que a média calculada paraas testemunhas. As correlações genéticas foramaltas entre todos os caracteres (mínimog(DAPxaltura r = 0,71, P < 0,01. Foram detectados altoscoeficientes de variação genética e herdabilidadespara todos os caracteres estudados, o que mostra apossibilidade de se obter altos ganhos com a seleçãomassal e entre e dentro de progênies. Os ganhosesperados para plantios com 20 anos de idade,realizados em locais com as mesmas característicasambientais de Assis e com sementes coletadasapós a seleção no teste de progênies, foramestimados em 10,6% para DAP, 4,1% para altura,e 23,5% para volume.The aim of this study was to estimategenetic parameters for growth traits in a progenytest of Pinus caribaea var. bahamensis, at 20 yearsold. The trial was implanted using open-pollinatedseeds from 89 seed-trees of the Centro deConservação Genética e Melhoramento dePinheiros Tropicais - CCGMPT, three progenies ofthe same species selected in Assis and eightprogenies of P. caribaea var. hondurensis, alsoselected for gum yield in Assis

  2. Investigação de possíveis obstruções sílico-aluminosas em tecidos condutores em Pinus caribaea var. Hondurensis relacionadas à senescência e morte de plantas

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    Lucélia Parreira Vasconcelos

    2011-06-01

    Full Text Available Com base na hipótese de que polímeros associados a silício (Si estariam obstruindo traqueídeos, e assim contribuindo para um colapso nutricional de maciços florestais de Pinus caribaea, tropicais em áreas de cerrado, nos chapadões das regiões do Triângulo Mineiro e do Alto Paranaíba (MG, foi desenvolvido este trabalho. Estudos precedentes mostraram uma relação estreita deste quadro fisiológico com deficiências nutricionais. Sabe-se, no entanto, que as sementes usadas na implantação desses maciços apresentavam grande variabilidade genética bem expressa na diversidade de comportamento das plantas, uma vez que parte delas permanece sadia enquanto outras entram em processo de senescência de intensidade variável, culminando com a morte da planta. Neste estudo, foram amostrados segmentos de raízes e do ponteiro de plantas aparentemente normais (acículas verdes, em diferentes estágios de senescência (acículas amareladas e mortas. Essas amostras, após secagem até o ponto crítico, foram observadas em um microscópio eletrônico de varredura acoplado de uma microssonda de raios-X. Constatou-se a presença de Si e Al nos tecidos do xilema e do floema, tanto na parte aérea quanto nas raízes, e os maiores teores foram encontrados no xilema das raízes. Todavia, não foi constatada obstrução ou qualquer presença de corpos sílico-aluminosos nos tecidos condutores das partes analisadas. Verificou-se, no entanto, que a presença de Si em associação ao Al ocorreu segundo uma relação Al/Si da ordem de 2,6. Os dados revelaram ainda que a amplitude de variação do Si é de 1,5 vez maior que a do Al. Concluiu-se que a amplitude de variação do Si é maior que a do Al, estabelecendo uma relação de variação (Si-Al.

  3. Determination of volume production in Eucalyptus and Pinus plantations in the states of Minas Gerais, Goias and Mato Grosso. Determinacao de producao volumetrica dos plantios de Eucalyptus e Pinus nos estados de Minas Gerais, Goias e Mato Grosso

    Energy Technology Data Exchange (ETDEWEB)

    1978-01-01

    Average volume for trees up to 10 yr old, volume increment, and other mensurational characteristics are reported on the basis of studies in plantations of Eucalyptus citriodora, other Eucalyptus spp., Pinus caribaea, and other Pinus spp. established in the Cerrado region. 10 references.

  4. Observações sobre o efeito da ventilação na qualidade de sementes de Pinus Effects of ventilation on the quality of Pinus seed

    Directory of Open Access Journals (Sweden)

    Antônio Augusto do Lago

    1976-01-01

    Full Text Available Duas amostras de sementes de Pinus oocarpa e Pinus caribaea foram submetidas a ventilação mecânica em aparelho de laboratório, obtendo-se duas frações, uma leve e outra pesada. Diversos testes foram realizados com sementes dessas duas frações e em uma da amostra original. Os resultados revelaram a possibilidade de melhorar a qualidade de lotes de sementes de Pinus por meio desse processo simples de beneficiamento.Seeds of Pinus oocarpa and P. caribaea were subjected to ventilation in a "South Dakota" seed blower, and thus three samples were obtained, i.e., heavy light, plus the original. Several tests were conducted with these samples and the results indicate that a substantial improvement in the quality of Pinus seed can be experimented after this very simple processing operation.

  5. Ensayo de procedencias de Pinus caribaea var. caribaea en alturas de pizarras, viñales, Pinar del Río, Cuba

    OpenAIRE

    Y. García-Quintana; A. Álvarez-Brito; E. Guízar-Nolazco

    2007-01-01

    Este trabajo se realizó como estudio de caso en el ambiente de Viñales, Pinar del Río, Cuba con el objetivo de seleccionar material genético de especial valor para la conservación y mejoramiento de la especie; a partir de nueve procedencias, encontrando diferencias significativas entre procedencias para las variables altura, diámetro y ramificación. Se clasificaron las procedencias en grupos de calidad A, B, C y D, recomendando los grupos A y B para el desarrollo de la especie en estos sitios...

  6. Eficiência dos herbicidas oxadiazil, oxadiazon, oxyfluorfen e Imazapyr sobre a cultura de pinus Efficiency of the oxadiazil, oxadiazon, oxyfluorfen and imazapyr herbicides on Pinus cropping

    OpenAIRE

    Wilson da Silva; Francisco A. Ferreira; José F. da Silva; Luís E. Firmino

    1999-01-01

    Avaliou-se a seletividade de alguns herbicidas para mudas de Pinus caribaea var. Hondurensis e suas eficiências no controle de plantas daninhas. As mudas com 20 cm de altura, produzidas em tubetes, foram transplantadas num espaçamento de 2,0 m x 2,0 m, em parcelas de quatro fileiras com 10,0 m de comprimento. Os tratamentos utilizados foram oxadiazil (600; 800 e 1000 g ha-1), oxadiazon (1140; 1520 e 1900 g ha-1), oxyfluorfen (720 g ha-1), imazapyr (250 g ha-1) e testemunhas (capinada e sem ca...

  7. EL CARIBE EN SOMBRAS

    Directory of Open Access Journals (Sweden)

    Claudia Caisso

    2010-01-01

    Full Text Available El trabajo reflexiona sobre el estatuto geo-político del Caribe. Se considera la sospecha en torno del descubrimiento europeo en la perspectiva de la crítica cultural de-colonial y se analizan algunos de los argumentos desplegados por Édouard Glissant en El discurso caribeño (1981. En particular se describe la importancia del valor de la "opacidad" a partir del análisis de algunos tópicos, en particular la resistencia del rodeo (detour. Tal cuestión es concebida a la luz de las transmutaciones que la defensa de la creolidad emplaza a diferencia de la "negritud" y su proyección en producciones de las últimas décadas del siglo XX.This work focusses on Caribbean geo-politic status. At first time it considers the suspicion pointed out by de-colonial Cultural Studies on America's "discovery" and then analizes some arguments written by Edouard Glissant in Caribbean discourse (1981. The importance of opacity's value in Caribbean discourse is described analizing some topics, in particular "round-about resistance". This question attends some traces that "creolité" defense promoves changing "negroo" movement and constructing some projections in latest decades productions.

  8. Comparative mapping among subsection Australes (genus Pinus, family Pinaceae).

    Science.gov (United States)

    Shepherd, Mervyn; Williams, Claire G

    2008-05-01

    Comparative mapping in conifers has not yet been used to test for small-scale genomic disruptions such as inversions, duplications, and deletions occurring between closely related taxa. Using comparative mapping to probe this smaller scale of inquiry may provide clues about speciation in a phylogenetically problematic taxon, the diploxylon pine subsection Australes (genus Pinus, family Pinaceae). Genetic maps were constructed for two allopatric species of Australes, P. elliottii var. elliottii and P. caribaea var. hondurensis, using microsatellites and an F1 hybrid. A third map was generated directly from the meiotic products of an adult F1 hybrid, eliminating the need for an F2 generation. Numerous small-scale disruptions were detected in addition to synteny and collinearity, and these included (1) map shrinkage, (2) a paracentric inversion, (3) transmission ratio distortion, and (4) mild selection against a parental haplotype. Such cryptic signatures of genomic divergence between closely related interfertile species are useful in elucidating this problematic evolutionary history. PMID:18438435

  9. Evaluation of initial diametric increase in different species of Pinus in the region of Santa Maria do Oeste (PR Avaliação de incremento diamétrico inicial em diferentes espécies de Pinus na região de Santa Maria do Oeste (PR

    Directory of Open Access Journals (Sweden)

    Edson Luis Serpe

    2010-02-01

    Full Text Available

    The evaluation of initial diametric increment in different species of Pinus was performed in the Central region of the Paraná State at a farm called Renato Festugato that is owned by the Ibema Brazilian Paper Company. Several species of Pinus (Pinus caribaea var. hondurensis Barr. & Golf., Pinus oocarpa Schiede, Pinus elliottii Engelm. and Pinus taeda L. were studied. Each study subject was 4 years old and the initial intervals were 2.50 per 2.00 m. The research objective was to compare the growth rate of two species implanted in large scale in the region “P. elliottii Engelm. and P. taeda L.” and two tropical species, “P. caribaea var. hondurensis Barr. & Golf. and P. oocarpa Schiede”, as well to compare these results with results of similar studies in other regions. In order to achieve the objective, 12 sample units were installed. Each sample unit had an area of 360 m² and included 3 samples of each species. Statistical tools were used, including the Bartlett test, variance analysis (ANOVA, and the Tukey test. Study variables included survival rate, diameter, and base area. The results showed that P. taeda L. is the most productive variety of Pinus for the region, followed by P. oocarpa Schiede, P. caribaea var. hondurensis Barr. & Golf., and P. elliottii Engelm.. In hotter regions P. taeda L. variety had smaller diameter when compared to P. caribaea var. hondurensis Barr. & Golf. and P. oocarpa Schiede. P. taeda L. is the best variety of Pinus for plantation in the tree farms of the south region of Brazil. P. oocarpa Schiede and P. caribaea var. hondurensis Barr. & Golf. are the most productive varieties for hotter regions (Southeastern Region of Brazil.

    A avaliação de incremento diamétrico inicial em diferentes espécies de Pinus foi realizada em uma área pertencente à Ibema Cia Brasileira de Papel na Fazenda Festugato, na região Central do Estado do Paraná. Foram avaliadas espécies do gênero Pinus

  10. Dunking behaviour in Carib grackles

    NARCIS (Netherlands)

    Morand-Ferron, J.; Lefebvre, L.; Reader, S.M.; Sol, D.; Elvin, S.

    2004-01-01

    Dunking behaviour, the dipping of food in water, has been anecdotally observed in more than 25 species of birds in the wild, but its function and ecology have not been systematically studied. In experiments conducted in the field and in captivity on Carib grackles, Quiscalus lugubris, in Barbados, w

  11. Canopy Layers Stratified Volume Equations for Pinus caribaea Stands in South West Nigeria using Linear Mixed Models

    OpenAIRE

    Peter Oluremi Adesoye

    2014-01-01

    Background and Purpose: Efficient forest stand management requires reliable estimates of growing stock. The reliability of stem volume estimates depends on the range and extent of available sample data. The potentials of canopy layers stratification in pure plantations as a means of improving the accuracy of stem volume equations have not been fully explored. Linear Mixed Model (LMM) approach is a statistical technique capable of yielding a more efficient prediction under clustered data struc...

  12. Identification of microorganisms of Phytophthora genre associated to Quercus sp. and Pinus sp. species in the provinces of Guatemala and Sacatepéquez

    Directory of Open Access Journals (Sweden)

    José Humberto Calderón Díaz

    2015-07-01

    Full Text Available The mean purpose of this research was to identify microorganism belonging to Phytophthora genera which are affecting mixed natural forests and nurseries of Pinus sp. and Quercus sp. These species have economic and social impact in provinces such as Guatemala and Sacatepéquez. Soil and vegetal tissue were used to isolate Phytophthora from natural forest of Guatemala, 45 Pinus sp. and 10 Quercus sp. were sampled and from nurseries 88 Pinus sp. and 11 Quercus sp. From Sacatepéquez province, from natural forest system were sampled 48 Pinus sp. and 15 Quercus sp. From nurseries were sampled 58 Pinus sp. and 25 Quercus sp. After processing the samples from soil and roots 13 were found positive to Phytophthora sp. in Pinus maximinoi, 10 from Guatemala and three from Sacatepéquez provinces. The culture of Phytophthora sp. on PDA produced two colonies without define form and five stoloniferous, five semipetaloid, one stelade type colonies. VP16 isolate was inoculated in five species of pine for pathogenicity test, causing high percentages of incidence and severity on Pinus caribaea, P. oocarpa, P. pseudostrobus and P. maximinoi and low rates of incidence and severity on Pinus tecunumanii.

  13. Eficiência dos herbicidas oxadiazil, oxadiazon, oxyfluorfen e Imazapyr sobre a cultura de pinus Efficiency of the oxadiazil, oxadiazon, oxyfluorfen and imazapyr herbicides on Pinus cropping

    Directory of Open Access Journals (Sweden)

    Wilson da Silva

    1999-08-01

    Full Text Available Avaliou-se a seletividade de alguns herbicidas para mudas de Pinus caribaea var. Hondurensis e suas eficiências no controle de plantas daninhas. As mudas com 20 cm de altura, produzidas em tubetes, foram transplantadas num espaçamento de 2,0 m x 2,0 m, em parcelas de quatro fileiras com 10,0 m de comprimento. Os tratamentos utilizados foram oxadiazil (600; 800 e 1000 g ha-1, oxadiazon (1140; 1520 e 1900 g ha-1, oxyfluorfen (720 g ha-1, imazapyr (250 g ha-1 e testemunhas (capinada e sem capina, dispostos em blocos ao acaso, com quatro repetições. Os herbicidas foram aplicados sete dias após o transplante, usando-se pulverizador costal, pressurizado com CO2, calibrado para 200 L ha- 1 de calda. As principais plantas daninhas com maior infestação foram: Brachiaria plantaginea e Ipomoea grandifolia e com menor infestação: Galinsoga parviflora e Bidens pilosa. O oxadiazil apresentou excelente controle de B. plantaginea, I. grandifolia e G. parviflora, não sendo eficiente para controle de B. pilosa, embora proporcionasse controle superior ao observado pelo oxadiazon. O oxadiazon foi eficiente até 45 dias após o tratamento para B. plantaginea, G. parviflora e até 90 dias para I. grandifolia. Tanto o oxyfluorfen quanto o imazapyr apresentaram excelente controle das plantas daninhas. De todos os herbicidas avaliados, apenas o imazapyr não deve ser recomendado para aplicação sobre o dossel de Pinus caribaea var. Hondurensis, em face da toxicidade provocada.The selectivity of some herbicides were evaluated on Pinus caribaea var. Hondurensis seedlings as well as these herbicide efficiencies in the weed control. When the tubule-produced seedlings were 20 cm height they were transplanted at 2,0 m x 2,0 m spacings in fourrows plots with 10,0 m length. The treatments with oxadiazil (600; 800 and 1000 g ha-1, oxadiazon (1140; 1520 and 1900 g ha-1, oxyfluorfen (720 g ha-1, imazpyr (250 g ha-1 and controls (weeded and without weeding were disposed

  14. The conquest of the Caribs of the Orinoco basin

    OpenAIRE

    Neil L Whitehead

    1984-01-01

    This thesis is concerned with the Spanish conquest of those Carib groups who, at the time of the first contact, occupied the eastern llanos of Venezuela, the north and south banks of the lower Orinoco and the region between the Sierra Imataca and Essequibo River. An historical analysis of Carib resistance to the Conquistadors and missionaries, during the years 1498-1771 is presented. Alongside this general theme certain specific issues in Carib history and ethnography are a...

  15. El alma negra del caribe colombiano

    Directory of Open Access Journals (Sweden)

    Cristian Manuel Olivero

    2014-02-01

    Full Text Available Cuando se habla del caribe y de la America Latina, en general suele recurrirse a la formula que dice que somos una mezcla de blancos indios y negros.  otros lugares comunes aparecen enseguida para relacionar lo que se llama el legado europeo, con el idioma, la religion, la economia, la politica lo que en algun gran politico de oficio colombiano llamo lo fundamental al tiempo en la contribucion.

  16. The CARIBIC flying observatory and its applications

    International Nuclear Information System (INIS)

    The troposphere can be considered as a complex chemical reactor reaching from the boundary layer up to the tropopause region, in which a multitude of reactions takes place driven by sunlight and supplied with precursors emitted by vegetation, wildfires, and obviously human activities on earth, like burning oil products. Research aircraft (say modified business jets) are far too expensive for a global view of this extensive atmospheric system that changes from day to night, season to season, year to year, and will keep changing. CARIBIC (www.caribic.de) is a logical answer; it is a flying observatory, a 1.5 ton freight container packed with over 15 instruments, for exploring the atmosphere on a regular basis using cargo space in a Lufthansa Airbus A340-600 on intercontinental flights. By means of various results obtained by CARIBIC, about among others volcanic eruptions, the monsoon and accompanying emissions of methane, and long range transport of pollution, we will show how some of the questions atmospheric research grapples with are being addressed, without having a fleet of business jets. (author)

  17. Pinus tropical com potencial para uso em plantios comerciais no Brasil. Tropical pine for commercial planting in Brazil.

    Directory of Open Access Journals (Sweden)

    Marcos Silveira WREGE

    2014-06-01

    Full Text Available Entre os pinus tropicais, Pinus caribaea var. hondurensis é uma variedade natural, oriunda de região com clima tropical na América Central. A espécie se aclimatou bem em várias partes do mundo, em regiões com alta pluviosidade e temperaturas elevadas. Embora não tolere geadas severas, pode ser plantada em partes da região Sul do Brasil onde o clima é mais quente e a frequência de geadas é menor e é indicado para plantio em boa parte do Brasil, em mais de 3,5 milhões de km2 . Essa é uma variedade que apresenta alto rendimento em madeira de boa qualidade, além de possibilitar a exploração da resina. Neste trabalho, são apresentadas as regiões no Brasil que apresentam potencial para cultivo dessa variedade em regime de silvicultura intensiva, tomando como base sua região de origem no mundo. São indicadas para plantio comercial as zonas com os menores riscos de geada nos estados da região Sul, no Estado de São Paulo e nas demais regiões que oferecem condições climáticas favoráveis, principalmente de disponibilidade hídrica para o desenvolvimento dessa variedade de pinus. – Among tropical pines, Pinus caribaea var. hondurensis is a natural variation from the tropical regions of Central America. The species has adapted well in various parts of the world, in regions with high rainfall and high temperatures. Although intolerance to severe frosts, it can be grown in parts of southern Brazil, where the climate is hot, with infrequent frosts and even can be used for commercial planting in over 3.5 million square kilometers.This variety presents high yield in quality wood as well as resin. This work shows regions in Brazil where environmental conditions are favorable for commercial plantations with this variety, by making comparisons with the conditions in its origin. Climatic zones within the Southern Region, as well as in the state of São Paulo and elsewhere with the lowest risks of frost and plenty of water for the

  18. Biodiversidad del margen continental del Caribe colombiano.

    OpenAIRE

    2010-01-01

    Incluye valiosa información producto de varios años de investigación marina de las aguas profundas, la plataforma continental y el talud superior del Caribe colombiano, llevada a cabo por un grupo multidisciplinario de investigadores en áreas de taxonomía, geología, ecología, cartografía y conservación del Invemar. Dentro de los resultados más destacados se encuentra el haber colectado e identificado más de 1600 especies, de las cuales alrededor del 35% se constituyeron en primeros registr...

  19. Atributos ecológicos para el manejo de Pinus tropicalis Morelet en la localidad de Galalón, Pinar del Río

    OpenAIRE

    Valdés Sáenz, María Adela

    2013-01-01

    En esta investigación se evaluaron los atributos ecológicos de la población natural de Pinus tropicalis Morelet en Galalón. Se establecieron seis parcelas de 400 m2 para la caracterización del suelo, clima, vegetación, estado de conservación, estructura florística y los atributos morfofisiológicos de la especie. La riqueza florística resultó con 30 géneros, 22 familias botánicas y 31 especies, siendo un área pobre florísticamente donde predomina P. tropicalis asociado con P. caribaea var. car...

  20. Selectividad de presas de Coralliophila abbreviata y C. caribaea en arrecifes coralinos del Parque Nacional Morrocoy, Venezuela: una aproximación experimental Selectivity of preys of Coralliophila abbreviata and C. caribaea in coral reefs of the National Park Morrocoy, Venezuela: an experimental approximation

    Directory of Open Access Journals (Sweden)

    Carlos del Mónaco

    2010-01-01

    Full Text Available Se evaluó la selectividad de presas de Coralliophila abbreviata y C. caribaea en seis arrecifes coralinos del Parque Nacional Morrocoy (PNM, Venezuela, mediante métodos descriptivos y experimentales. Se estimó la abundancia y riqueza coralina, el número de Coralliophila spp. y su presa coralina mediante cuadratas aleatorias de 1 m² en tres sitios por cada arrecife . Se utilizaron ocho jaulas de exclusión de 1 m³ en cuyo interior se colocaron cinco colonias coralinas de diferentes especies, equidistantes a 10 individuos de C. abbreviata. Se observó una estrecha relación depredador-presa entre C. abbreviata y la hexacoralina Montastraea annularis, representando el 56,8% de todas las interacciones en todas las localidades, seguida por Diploria strigosa (19,3%, Agaricia agaricites (12,2%, Colpophyllia natans (4,6% y A. tenuifolia (3,1%. C. caribaea exhibió una mayor afinidad con el octocoral Erythropodium caribaeorum (42,6% y las hexacoralinas C. natans (24,1%, Montastraea faveolata (11,1%, Porites porites (7,4% y D. strigosa (11,1%. De igual forma, el experimento mostró mayor asociación de C. abbreviata con M. annularis 53,3%, seguida por C. natans (17,8%, A. tenuifolia y D. strigosa (11,1% cada una y A. agaricites (6,7%. Según estos resultados, C. abbreviata debería generar un mayor impacto que C. caribaea sobre el PNM debido a que sus presas más frecuentes están entre las principales formadoras de arrecife mientras que C. caribaea depredó mayormente a E. caribaeorum, la cual es competidora de hexacorales.Coralliophila abbreviata and C. caribaea are tropical gastropods of the Caribbean Sea. These gastropods have shown to be important corallivores. The objective of this work was to evaluate in situ the prey selectivity of C. abbreviata and C. caribaea in some coral reefs of Morrocoy National Park by means of experimental and descriptive methods. We used quadrats of 1 m² to estimate coral abundance and richness, number of

  1. Energy rating and productive of wood from reforestation of Eucalyptus and Pinus genetically improved in the state of Sao Paulo

    International Nuclear Information System (INIS)

    Full text: In recent years, wood consumption is increasing, and the need to increase the availability of commercial wood reforestation becomes essentially important. In the state of Sao Paulo a few species of Eucalyptus and Pinus have stood out for having high productivity and with updated technical genetic improvements to productivity can be increased to 60 %. The work has to evaluate the productivity and quality of wood provided with commercial reforestation species of Eucalyptus and Pinus genetically improved in the midwestern region of Sao Paulo. In this study we used six treatments: a seminal Eucalyptus grandis; two clones of Eucalyptus grandis, three hybrid clones of Eucalyptus urophylla x Eucalyptus grandis. Pinus were analyzed for five hybrid progenies of Pinus caribaea var. hondurensis and Pinus tecunumanii. We evaluated the productivity rates of each treatment and the quality of wood produced, by studying their average density and specific variations possible by the methods: TARG (Technique attenuation of gamma radiation from 241Am) and immersion. Productivity mass IMAM treatments for Eucalyptus S1, C1, C2, H1, H2 and H3 were 18.7, 17.0, 21.2, 28.1, 30.1 and 27.2 ton/ha.years respectively, and the density point to 12 % treatments S1, C1, C2, H1, H2 and H3 were 451.3, 439.0, 411.9, 518.8, 526.4 and 526.3 kg/m3. Productivity for Pinus mass IMAM treatments H1, H2, H3, H4, H5 and S1 were 14.7, 13.5, 13.7, 14.8, 12.4 and 13.0 ton/ha.years respectively, and the density point to 12 % treatments H1, H2, H3, H4, H5 and S1 were 475, 522, 459, 478, 430 and 514 kg/m3. These results are extremely important and come to contradict some literature results that correlate productivity gains with losses in density. It was concluded that the values of density and productivity of each treatment and sperm Pinus hybrids there was significant improvement in the indices assessed. While in the Eucalyptus the results were remarkable, reflecting the improvement in productivity for

  2. Análisis del concepto caribe: crítica epistemológica para entender el caribe colombiano

    OpenAIRE

    Ronald Alfaro García

    2014-01-01

    Este artículo presenta una revisión del concepto caribe a la luz de una perspectiva discursiva y epistemológica en consonancia con la coyuntura de las relaciones entre hegemonías del poder y espacio geográfico. Pretende entender teóricamente el concepto caribe y articularlo a las problemáticas que éste implica. La revisión atiende a las perspectivas socioculturales y discursivas que llevan a concluir que el concepto macro y la realidad del Caribe Colombiano deben ser pensados a la luz de las ...

  3. Biomass Burning observed during IAGOS - CARIBIC

    Science.gov (United States)

    Neumaier, Marco; Fischbeck, Garlich; Hermann, Markus; Scharffe, Dieter; Safadi, Layal; Zahn, Andreas

    2016-04-01

    Biomass Burning observed during IAGOS - CARIBIC Since May 2005 the CARIBIC passenger aircraft (Civil Aircraft for the Regular Investigation of the atmosphere Based on an Instrument Container - Lufthansa, Airbus 340-600) measures ˜100 trace gases and aerosol components in the UTLS (9-12 km altitude) on 4-6 consecutive long-distance flights per month. Volatile Organic Compounds (VOCs) are measured with a Proton-Transfer-Reaction Mass Spectrometer (PTR-MS). Worldwide ~1.3 Tg/y of acetonitrile (CH3CN) is emitted into the atmosphere almost exclusively from biomass burning (BB) together with other VOCs (e.g. ketones, aldehydes, aromatics), CO, CO2, NOx and aerosol particles. Therefore, and due to its rather long tropospheric lifetime of ~6 months, acetonitrile constitutes a reliable BB tracer. Based on the signal of acetonitrile and CO we checked several algorithms to detect BB plumes in the IAGOS-CARIBIC data set. It turned out that the most intense BB plumes were sampled during summer over North America and during autumn over South America. The results will also be discussed with respect to biases due to flight statistics (i.e. destination, flight season, sampling of tropospheric and stratospheric air, etc.). Two flights that took place during the strong ENSO (El Niño/Southern Oscillation) event in July 2015 between Munich (MUC) and Los Angeles (LAX) will be discussed in more detail by taking into account other VOCs and aerosol particles. Here acetonitrile mixing ratios of up to ~1100 pptv were sampled over Greenland ~0.5 km above the tropopause. It is shown that the sampled air originated from Northern America / Canada where strong wildfires took place. During the flight from LAX to MUC the boundary layer air entered the upper troposphere by isentropic quasi-horizontal mixing and not by fast convective transport. The correlation of some VOCs (i.e. acetone, methanol and acetonitrile) with CO will be discussed and contrasted to findings from the literature. It is

  4. PINUS OCCIDENTALIS SWARTZ

    Directory of Open Access Journals (Sweden)

    Virgilio Antonio Miniño Mejía

    2014-01-01

    Full Text Available La gran biodiversidad de especies de plantas en la islaLa Española, hace conveniente la elaboración de trabajos quepermitan identificar las familias, géneros y especies, a partir dediversos caracteres, como losanatómicos. En la RepúblicaDominicana se carece de investigaciones sobre las semillas delas especies endémicas. Es importante profundizar en estudiosmorfológicos y anatómicos de las semillas de nuestras especies yemplearlas con diferentes fines, como orientación taxonómica,conocer más sobre su ecología, entre otros. En nuestro trabajotratamos de utilizar un carácter relevante dePinus occidentalis,como es su semilla. El presente estudio nos permite conocer sobrela superficie de la semilla dePinus occidentalis, pues la morfología dela semilla juega un papel importante en la dispersión de la especie.

  5. Comparação entre modelos para determinação da porcentagem de madeira em árvores de Pinus caribaea Morelet var. hondurensis Barr. et Golf. em Itirapina. Comparison between models to estimate the percentage of wood in Pinus caribaea Morelet var . hondurensis Barr. et Golf . Trees in Itirapina.

    Directory of Open Access Journals (Sweden)

    Gilberto de Souza PINHEIRO

    2005-06-01

    Full Text Available Efetuou-se a comparação de doismodelos para determinação da porcentagem demadeira com a obtida pela razão entre o volumecom casca com o volume sem casca. As análises devariância efetuadas com aplicação do teste deTukey permitem concluir que a porcentagem demadeira obtida pela média aritmética dos valoresquadráticos do fator casca, encontrados ao longodo fuste aproxima-se mais do valor real que oestimado através do modelo simplificado obtidopelo quadrado da razão entre o DAP sem casca e oDAP com casca. A análise da somatória dosdesvios em valores relativos mostra que o modelosimplificado subestima o valor da porcentagem demadeira, enquanto o modelo da média aritmética osuperestima. Dessa forma se sugere a utilizaçãoapenas do valor obtido pelo cociente do volumesem casca pelo volume com casca.The aim of this study was to comparetwo different models with estimate the percentageof wood obtained by quotient between volume of atree without bark and volume of a tree with bark( 1 K with two different models: 22 K , obtainedby the square of mean of the values along thesteam and 23 K , the simplified model, obtained byonly two measures: the square of the quotientbetween DBH without bark and DBH with bark.Effectuated the statistical analysis by analysis ofvariance procedure, Tukey’s Test and sum ofrelatives values of deviation, it was concluded thatthe best model to calculate the percentage of woodis the one obtained by the quotient between thevolume without bark and the volume with bark.

  6. Project Caribe, 1986-1987. OEA Evaluation Report.

    Science.gov (United States)

    Villegas, Jose J.; Cabrera, Eulalia

    Project CARIBE (Career Awareness in Bilingual Education) was a Title VII-funded project in its third year at two New York high schools, one in Brooklyn and one in Queens. The project supplemented municipally funded bilingual programs for limited-English-speaking Hispanic students by establishing a resource/computer center and conducting academic…

  7. Project CARIBE, 1985-1986. OEA Evaluation Report.

    Science.gov (United States)

    New York City Board of Education, Brooklyn. Office of Educational Assessment.

    In 1985-86, the second year of funding, Project CARIBE proposed to increase career awareness among Spanish-speaking students of limited English proficiency (LEP) through a computer-literacy program. The project operated at two schools in Brooklyn, New York, Eastern District High School and Clara Barton High School, but after the number of…

  8. Gobioides broussoneti Lacepede (Pisces: Gobiidae) en el Caribe colombiano

    OpenAIRE

    Acero-P., A.; Arenas-Granados, P.

    1990-01-01

    Se registra la presencia del pe? Gobiidae Gobioides broussoneti en el área adyacente a la boca de la Ciénaga Grande de Santa Marta (Caribe colombiano). Se colectaron 29 especímenes, 28 de ellos Juveniles (48-51 mm) y el otro un macho maduro (553 mm); el contenido del tubo digestivo del adulto indica que la especie consume básicamente material detrítico vegetal, complementado con pequeños invertebrados.

  9. Atmospheric mercury measurements onboard the CARIBIC passenger aircraft

    Science.gov (United States)

    Slemr, Franz; Weigelt, Andreas; Ebinghaus, Ralf; Kock, Hans H.; Bödewadt, Jan; Brenninkmeijer, Carl A. M.; Rauthe-Schöch, Armin; Weber, Stefan; Hermann, Markus; Becker, Julia; Zahn, Andreas; Martinsson, Bengt

    2016-05-01

    Goal of the project CARIBIC (Civil Aircraft for the Regular Investigation of the atmosphere Based on an Instrumented Container) is to carry out regular and detailed observations of atmospheric composition (particles and gases) at cruising altitudes of passenger aircraft, i.e. at 9-12 km. Mercury has been measured since May 2005 by a modified Tekran instrument (Tekran Model 2537 A analyser, Tekran Inc., Toronto, Canada) during monthly intercontinental flights between Europe and South and North America, Africa, and Asia. Here we describe the instrument modifications, the post-flight processing of the raw instrument signal, and the fractionation experiments.

  10. Comercio de Colombia con el Caribe Insular, 1990-1999

    OpenAIRE

    María Modesta Aguilera Diaz

    2001-01-01

    El Caribe insular es un mercado regional que ofrece una gran oportunidad de exportación para los bienes y servicios colombianos, debido a que es importador de la mayoría de los bienes que consume. Esta investigación analiza la evolución y magnitud del comercio que Colombia mantuvo con esta región económica en la década de los noventa, encontrando un mercado aún muy reducido con una alta especialización hacia la venta de petróleo, pero con una tendencia a la diversificación hacia otros product...

  11. Nota sobre la densidad y tasa de depredación de Coralliophila abbreviata y Coralliophila caribaea sobre colonias jóvenes de Acropora palmata en un arrecife deteriorado de Cayo Sombrero, Parque Nacional Morrocoy, Venezuela Note on density and predation rate of Coralliophila abbreviata and Coralliophila caribaea on juvenile colonies of Acropora palmata in a deteriorated coral reef of Cayo Sombrero, Morrocoy National Park, Venezuela

    Directory of Open Access Journals (Sweden)

    Carlos del Mónaco

    2011-01-01

    Full Text Available Los arrecifes del Parque Nacional Morrocoy (PNM se encuentran actualmente impactados. Posterior a la mortandad masiva ocurrida en 1996, ha habido indicios de recuperación de Acropora palmata. Este proceso podría ser retrasado por Coralliophila. Se observaron solamente tres colonias de A. palmata en todo un arrecife de Cayo Sombrero. En julio 2005 estas presentaron densidades de Coralliophila abbreviata de 4, 0 y 2 ind/col y de Coralliophila caribaea de 22, 14 y 0 ind/col y, en enero 2006 las densidades fueron: 8, 0 y 4 ind/col de C abbreviata y 22, 14 y 0 ind/col de C caribaea. En las tres colonias se observaron cuatro lesiones (dos de cada depredador. Hubo pérdida de tejido de 66,14 cm a 162,85 cm en las lesiones ocasionadas por C abbreviata, con tasa de depredación de 0,52 cm día-1 en una de ellas, mientras que en otra fue de 37,41 a 72,50 cm con tasa de depredación de 0,19 cm día-1 . Las lesiones generadas por C caribaea no cambiaron. Es probable que el efecto de Coralliophila afecte la recuperación de A. palmata en el PNM, considerando la alta densidad de depredadores y la escasa abundancia de este coral en este parque.The coral reefs of Morrocoy National Park are currently deteriorated. After the massive mortality of 1996, Acropora palmata has shown some signs of recovery, a process that could be hampered by Coralliophila. We observed only three colonies of A. palmata in an entire reef in Cayo Sombrero. In July 2005, these colonies registered Coralliophila abbreviata densities of 4, 0, and 2 ind/col and Coralliophila caribaea densities of 22, 14, and 0 ind/col; in January 2006, said densities were 8, 0, and 4 ind/col (C. abbreviaté and 22, 14, and 0 ind/col (C. caribaea. Four sites of damage (two per predator were observed in the three colonies. In one colony, C abbreviata caused a loss of tissue of 66.14 to 162.85 cm , indicating a predation rate of 0.52 cm² day-1. In the other colony, the damage ranged from 37.41 to 72.50 cm2

  12. Wind pollination in Pinus roxburghii

    Institute of Scientific and Technical Information of China (English)

    Vinod Prasad KHANDURI; Chandra Mohan SHARMA

    2007-01-01

    Stigmatic pollen load and pollen concentration in the air were studied in the natural population of Pinus roxburghii at Ashtavakra (900 m asl), in the Pauri forest division of Garhwal Himalaya, India. The results reflect diurnal pollen occurrence in P. roxburghii, with the strong significant correlations between pollen concentrations in the air and wind speed, air temperature and relative air humidity. A significant correlation was also observed between microsporangium dehiscence and pollen occurrence in the air. The maximum concentration of pollen grains in the air and higher rates of pollen deposition onto the megasporophylls were between 12 pm and 16 pm of the day, which conforms the best time for pollination in a day in P. roxburghii. The receptivity of Ovulate strobili varied from 3 to 5days, however, the bagged strobili remained receptive up to 6 days.

  13. CARIBE WAVE/LANTEX Caribbean and Western Atlantic Tsunami Exercises

    Science.gov (United States)

    von Hillebrandt-Andrade, C.; Whitmore, P.; Aliaga, B.; Huerfano Moreno, V.

    2013-12-01

    Over 75 tsunamis have been documented in the Caribbean and Adjacent Regions over the past 500 years. While most have been generated by local earthquakes, distant generated tsunamis can also affect the region. For example, waves from the 1755 Lisbon earthquake and tsunami were observed in Cuba, Dominican Republic, British Virgin Islands, as well as Antigua, Martinique, Guadalupe and Barbados in the Lesser Antilles. Since 1500, at least 4484 people are reported to have perished in these killer waves. Although the tsunami generated by the 2010 Haiti earthquake claimed only a few lives, in the 1530 El Pilar, Venezuela; 1602 Port Royale, Jamaica; 1918 Puerto Rico; and 1946 Samaná, Dominican Republic tsunamis the death tolls ranged to over a thousand. Since then, there has been an explosive increase in residents, visitors, infrastructure, and economic activity along the coastlines, increasing the potential for human and economic loss. It has been estimated that on any day, upwards of more than 500,000 people could be in harm's way just along the beaches, with hundreds of thousands more working and living in the tsunamis hazard zones. Given the relative infrequency of tsunamis, exercises are a valuable tool to test communications, evaluate preparedness and raise awareness. Exercises in the Caribbean are conducted under the framework of the UNESCO IOC Intergovernmental Coordination Group for the Tsunami and other Coastal Hazards Warning System for the Caribbean and Adjacent Regions (CARIBE EWS) and the US National Tsunami Hazard Mitigation Program. On March 23, 2011, 34 countries and territories participated in the first CARIBE WAVE/LANTEX regional tsunami exercise, while in the second exercise on March 20, 2013 a total of 45 countries and territories participated. 481 organizations (almost 200 more than in 2011) also registered to receive the bulletins issued by the Pacific Tsunami Warning Center (PTWC), West Coast and Alaska Tsunami Warning Center and/or the Puerto Rico

  14. First results from the high resolution air sampler (HIRES) installed in the CARIBIC observatory

    Science.gov (United States)

    Brenninkmeijer, C. A.; Koeppel, C.; Baker, A. K.; Schuck, T. J.

    2011-12-01

    In May 2010 the CARIBIC instrument container (Civil Aircraft for the Regular Investigation of the atmosphere Based on an Instrument Container; www.caribic-atmospheric.com) was upgraded to include a new high resolution air sampler, HIRES. This new sampler consists of 88 1L stainless steel sampling flasks, supplementing the existing 2 units with 14 2.5L glass flasks each, increasing the CARIBIC sampling capacity to 116 whole air samples collected using a single pumping unit having two metal bellow pumps in series. The CARIBIC project involves the monthly deployment of a fully automated instrument container equipped to make atmospheric measurements from aboard a commercial airliner, and has operated since 2005 onboard a Lufthansa Airbus 340-600. Measurements from the container include in-situ trace gas and aerosol analyses and the collection of aerosol and whole air samples for post-flight laboratory analysis. Measurements made from the sampling flasks include greenhouse gas (GHG) and nonmethane hydrocarbon (NMHC) analysis. The first deployment of HIRES for a CARIBIC flight was in June 2010, and it has been in routine monthly operation since, making a total of 1188 HIRES air samples collected as of July 2011 (from a total of 1566 CARIBIC air samples). The ability of CARIBIC to observe the atmosphere at aircraft cruising altitudes (9-12 km) provides the opportunity to regularly measure the composition of the upper troposphere/lowermost stratosphere (UT/LS), and increased sampling resolution has provided invaluable long-term observations of GHG and NMHC gradients across the tropopause which are unique to CARIBIC. Here we provide a detailed description of the collection system itself, and give first results from the inaugural year of HIRES, which include detailed observations of pollution plumes over eastern Asia, tropical convection over continental Africa, and trace gas gradients in the tropopause at high northern latitudes.

  15. CARIBIC aircraft measurements of Eyjafjallajökull volcanic plumes in April/May 2010

    OpenAIRE

    A. Rauthe-Schöch; Weigelt, A; Hermann, M.; B. G. Martinsson; A. K. Baker; K.-P. Heue; C. A. M. Brenninkmeijer; Zahn, A.; D. Scharffe; S. Eckhardt; Stohl, A.; van Velthoven, P.F.J.

    2011-01-01

    The Civil Aircraft for the Regular Investigation of the Atmosphere Based on an Instrument Container (CARIBIC) project investigates physical and chemical processes in the Earth's atmosphere using a Lufthansa Airbus long-distance passenger aircraft. After the beginning of the explosive eruption of the Eyjafjallajökull volcano on Iceland on 14 April 2010, the first CARIBIC volcano-specific measurement flight was carried out over the Baltic Sea and Southern Sweden on 20 April. Two more flights fo...

  16. Morphological evaluation of the Pinus kesiya complex (Pinaceae)

    Czech Academy of Sciences Publication Activity Database

    Businský, R.; Frantík, Tomáš; Vít, Petr

    2014-01-01

    Roč. 300, č. 2 (2014), s. 273-285. ISSN 0378-2697 Institutional support: RVO:67985939 Keywords : morphological variation * Pinus densata ssp. tibetica * Pinus kesiya complex Subject RIV: EF - Botanics Impact factor: 1.422, year: 2014

  17. Pinus taeda AND Pinus oocarpa PLYWOOD MANUFACTURING WITH FENOL-FORMALDHEYDE RESIN

    Directory of Open Access Journals (Sweden)

    Setsuo Iwakiri

    2002-01-01

    Full Text Available The objective of this study was to evaluate the quality of the plywood, manufactured from Pinus taeda and Pinus oocarpa, with 20 and 24 years old respectively, using three differentformulations of the fenol-formaldheyde resin. The results of the glue line shearing tests not showed statistical differences between the species and three resin formulations. In the hot water test, all of the boards were classified as “BR” and, the boards of the Pinus oocarpa produced with formulations (1and (3, were classified as “WBP”. The different resin formulations not influenced on the modulus ofelasticity (MOE and modulus of rupture (MOR The boards of Pinus taeda with formulations (1 and(2 showed higher values of MOE in comparison of the Pinus oocarpa. The MOR of the Pinus oocarpa withformulation (2 was higher than Pinus taeda. The mechanical properties of the plywood wereprobably influenced by wood variability related to sapwood and hartwood, thickness of growth ringsand, springwood and summerwood.

  18. CARIBIC observations of short-lived halocarbons and carbonyl sulphide over Asia

    Science.gov (United States)

    Leedham, E.; Wisher, A.; Oram, D.; Baker, A. K.; Brenninkmeijer, C. A.

    2013-12-01

    The CARIBIC project (Civil Aircraft for the Regular Investigation of the atmosphere Based on an Instrument Container, www.caribic-atmospheric.com) aims to investigate the spatial and temporal distribution of a wide-range of compounds, including those of marine origin/influence, via ~monthly flights to collect in situ data and whole air samples aboard a commercial Lufthansa aircraft. CARIBIC measures up to an altitude of 12 km, allowing the influence of marine compounds on the upper troposphere/lower stratosphere (UTLS) to be explored. In particular, CARIBIC is a useful tool for exploring the impact of very short lived halocarbons (e.g. CH2Br2, CHBr3), whose impact on stratospheric ozone is dependent on convective uplift to the UTLS, a process which is not yet fully quantified. As part of the suite of CARIBIC measurements, whole air samples are analysed at the University of East Anglia (UEA) via gas chromatography mass spectrometry for carbonyl sulphide (OCS) and up to 40 halocarbons (accounting for virtually 100% of organic chlorine, bromine and iodine in the UTLS). Here we present an overview of short-lived halocarbons and OCS measured by CARIBIC. We focus on two regions of particular interest. (1) measurements made in 2012 over the tropical west Pacific to link with UEA measurements made during the SHIVA campaign. (2) measurements made during a collection of flights over India in 2008. Flights over India investigated the impact of monsoon circulation on the distribution of these compounds; for example, elevated concentrations of OCS were seen in CARIBIC samples taken over India during the summer monsoon (July - September). These flights, along with a wider range of flights over Asia (from Frankfurt to Guangzhou, Manila, Bangkok and Kuala Lumpur) can provide unique information on the influence of tropical convection and monsoon circulation on halocarbon and OCS transport within this region.

  19. Biological repair of Pichia Pinus yeasts

    International Nuclear Information System (INIS)

    The effectiveness of liquid-holding recovery of Pichia pinus yeast after γ- and α-irradiation was determined. Haploid cells are not capable of recovery involved. Nonreparable component of diploid yeast recovery is 0.7 after γ-irradiation and 0.8 after α-irradiation

  20. Needle morphological evidence of the homoploid hybrid origin of Pinus densata based on analysis of artificial hybrids and the putative parents, Pinus tabuliformis and Pinus yunnanensis

    OpenAIRE

    Xing, Fangqian; Mao, Jian-Feng; Meng, Jingxiang; Dai, Jianfeng; Zhao, Wei; Hao LIU; Xing, Zhen; Hua ZHANG; Wang, Xiao-Ru; Li, Yue

    2014-01-01

    Genetic analyses indicate that Pinus densata is a natural homoploid hybrid originating from Pinus tabuliformis and Pinus yunnanensis. Needle morphological and anatomical features show relative species stability and can be used to identify coniferous species. Comparative analyses of these needle characteristics and phenotypic differences between the artificial hybrids, P. densata, and parental species can be used to determine the genetic and phenotypic evolutionary consequences of natural hybr...

  1. A comparison of estimation methods for fitting Weibull, Johnson's SB and beta functions to Pinus pinaster, Pinus radiata and Pinus sylvestris stands in northwest Spain

    Energy Technology Data Exchange (ETDEWEB)

    Gorgoseo, J. J.; Rojo, A.; Camara-Obregon, A.; Dieguez-Aranda, U.

    2012-07-01

    The purpose of this study was to compare the accuracy of the Weibull, Johnson's SB and beta distributions, fitted with some of the most usual methods and with different fixed values for the location parameters, for describing diameter distributions in even-aged stands of Pinus pinaster, Pinus radiata and Pinus sylvestris in northwest Spain. A total of 155 permanent plots in Pinus sylvestris stands throughout Galicia, 183 plots in Pinus pinaster stands throughout Galicia and Asturias and 325 plots in Pinus radiata stands in both regions were measured to describe the diameter distributions. Parameters of the Weibull function were estimated by Moments and Maximum Likelihood approaches, those of Johnson's SB function by Conditional Maximum Likelihood and by Knoebel and Burkhart's method, and those of the beta function with the method based on the moments of the distribution. The beta and the Johnson's SB functions were slightly superior to Weibull function for Pinus pinaster stands; the Johnson's SB and beta functions were more accurate in the best fits for Pinus radiata stands, and the best results of the Weibull and the Johnson's SB functions were slightly superior to beta function for Pinus sylvestris stands. However, the three functions are suitable for this stands with an appropriate value of the location parameter and estimation of parameters method. (Author) 44 refs.

  2. An optical particle size spectrometer for aircraft-borne measurements in IAGOS-CARIBIC

    Science.gov (United States)

    Hermann, Markus; Weigelt, Andreas; Assmann, Denise; Pfeifer, Sascha; Muller, Thomas; Conrath, Thomas; Voigtlander, Jens; Heintzenberg, Jost; Wiedensohler, Alfred; Martinsson, Bengt G.; Deshler, Terry; Brenninkmeijer, Carl A. M.; Zahn, Andreas

    2016-05-01

    The particle number size distribution is an important parameter to characterize the atmospheric aerosol and its influence on the Earth's climate. Here we describe a new optical particle size spectrometer (OPSS) for measurements of the accumulation mode particle number size distribution in the tropopause region on board a passenger aircraft (IAGOS-CARIBIC observatory: In-service Aircraft for a Global Observing System - Civil Aircraft for Regular Investigation of the Atmosphere Based on an Instrument Container). A modified KS93 particle sensor from RION Co., Ltd., together with a new airflow system and a dedicated data acquisition system, is the key component of the CARIBIC OPSS. The instrument records individual particle pulse signal curves in the particle size range 130-1110 nm diameter (for a particle refractive index of 1.47-i0.006) together with a time stamp and thus allows the post-flight choice of the time resolution and the size distribution bin width. The CARIBIC OPSS has a 50 % particle detection diameter of 152 nm and a maximum asymptotic counting efficiency of 98 %. The instrument's measurement performance shows no pressure dependency and no particle coincidence for free tropospheric conditions. The size response function of the CARIBIC OPSS was obtained by a polystyrene latex calibration in combination with model calculations. Particle number size distributions measured with the new OPSS in the lowermost stratosphere agreed within a factor of 2 in concentration with balloon-borne measurements over western North America. Since June 2010 the CARIBIC OPSS is deployed once per month in the IAGOS-CARIBIC observatory.

  3. La culture musicale caribéenne de New York - 04

    OpenAIRE

    Audebert, Cédric

    2012-01-01

    Le bassin caribéen est un espace de production musicale foisonnante (reggae, salsa, konpa, meringue, zouk, calypso, etc.) au rayonnement international. Les musiques puisent leur énergie principalement dans l'héritage de la plantation et des quartiers populaires urbains des îles d'origine, mais aussi dans le cosmopolitisme des métropoles d'immigration. La mondialisation des musiques caribéennes s'appuie sur les puissants réseaux nord-américains de production et de diffusion, dont les communaut...

  4. La culture musicale caribéenne de New York - 11

    OpenAIRE

    Audebert, Cédric

    2012-01-01

    Le bassin caribéen est un espace de production musicale foisonnante (reggae, salsa, konpa, meringue, zouk, calypso, etc.) au rayonnement international. Les musiques puisent leur énergie principalement dans l'héritage de la plantation et des quartiers populaires urbains des îles d'origine, mais aussi dans le cosmopolitisme des métropoles d'immigration. La mondialisation des musiques caribéennes s'appuie sur les puissants réseaux nord-américains de production et de diffusion, dont les communaut...

  5. La culture musicale caribéenne de New York - 03

    OpenAIRE

    Audebert, Cédric

    2012-01-01

    Le bassin caribéen est un espace de production musicale foisonnante (reggae, salsa, konpa, meringue, zouk, calypso, etc.) au rayonnement international. Les musiques puisent leur énergie principalement dans l'héritage de la plantation et des quartiers populaires urbains des îles d'origine, mais aussi dans le cosmopolitisme des métropoles d'immigration. La mondialisation des musiques caribéennes s'appuie sur les puissants réseaux nord-américains de production et de diffusion, dont les communaut...

  6. La culture musicale caribéenne de New York - 01

    OpenAIRE

    Audebert, Cédric

    2012-01-01

    Le bassin caribéen est un espace de production musicale foisonnante (reggae, salsa, konpa, meringue, zouk, calypso, etc.) au rayonnement international. Les musiques puisent leur énergie principalement dans l'héritage de la plantation et des quartiers populaires urbains des îles d'origine, mais aussi dans le cosmopolitisme des métropoles d'immigration. La mondialisation des musiques caribéennes s'appuie sur les puissants réseaux nord-américains de production et de diffusion, dont les communaut...

  7. La culture musicale caribéenne de New York - 10

    OpenAIRE

    Audebert, Cédric

    2012-01-01

    Le bassin caribéen est un espace de production musicale foisonnante (reggae, salsa, konpa, meringue, zouk, calypso, etc.) au rayonnement international. Les musiques puisent leur énergie principalement dans l'héritage de la plantation et des quartiers populaires urbains des îles d'origine, mais aussi dans le cosmopolitisme des métropoles d'immigration. La mondialisation des musiques caribéennes s'appuie sur les puissants réseaux nord-américains de production et de diffusion, dont les communaut...

  8. La culture musicale caribéenne de New York - 05

    OpenAIRE

    Audebert, Cédric

    2012-01-01

    Le bassin caribéen est un espace de production musicale foisonnante (reggae, salsa, konpa, meringue, zouk, calypso, etc.) au rayonnement international. Les musiques puisent leur énergie principalement dans l'héritage de la plantation et des quartiers populaires urbains des îles d'origine, mais aussi dans le cosmopolitisme des métropoles d'immigration. La mondialisation des musiques caribéennes s'appuie sur les puissants réseaux nord-américains de production et de diffusion, dont les communaut...

  9. La culture musicale caribéenne de New York - 14

    OpenAIRE

    Audebert, Cédric

    2012-01-01

    Le bassin caribéen est un espace de production musicale foisonnante (reggae, salsa, konpa, meringue, zouk, calypso, etc.) au rayonnement international. Les musiques puisent leur énergie principalement dans l'héritage de la plantation et des quartiers populaires urbains des îles d'origine, mais aussi dans le cosmopolitisme des métropoles d'immigration. La mondialisation des musiques caribéennes s'appuie sur les puissants réseaux nord-américains de production et de diffusion, dont les communaut...

  10. La culture musicale caribéenne de New York - 12

    OpenAIRE

    Audebert, Cédric

    2012-01-01

    Le bassin caribéen est un espace de production musicale foisonnante (reggae, salsa, konpa, meringue, zouk, calypso, etc.) au rayonnement international. Les musiques puisent leur énergie principalement dans l'héritage de la plantation et des quartiers populaires urbains des îles d'origine, mais aussi dans le cosmopolitisme des métropoles d'immigration. La mondialisation des musiques caribéennes s'appuie sur les puissants réseaux nord-américains de production et de diffusion, dont les communaut...

  11. La culture musicale caribéenne de New York - 02

    OpenAIRE

    Audebert, Cédric

    2012-01-01

    Le bassin caribéen est un espace de production musicale foisonnante (reggae, salsa, konpa, meringue, zouk, calypso, etc.) au rayonnement international. Les musiques puisent leur énergie principalement dans l'héritage de la plantation et des quartiers populaires urbains des îles d'origine, mais aussi dans le cosmopolitisme des métropoles d'immigration. La mondialisation des musiques caribéennes s'appuie sur les puissants réseaux nord-américains de production et de diffusion, dont les communaut...

  12. La culture musicale caribéenne de New York - 07

    OpenAIRE

    Audebert, Cédric

    2012-01-01

    Le bassin caribéen est un espace de production musicale foisonnante (reggae, salsa, konpa, meringue, zouk, calypso, etc.) au rayonnement international. Les musiques puisent leur énergie principalement dans l'héritage de la plantation et des quartiers populaires urbains des îles d'origine, mais aussi dans le cosmopolitisme des métropoles d'immigration. La mondialisation des musiques caribéennes s'appuie sur les puissants réseaux nord-américains de production et de diffusion, dont les communaut...

  13. La culture musicale caribéenne de New York - 13

    OpenAIRE

    Audebert, Cédric

    2012-01-01

    Le bassin caribéen est un espace de production musicale foisonnante (reggae, salsa, konpa, meringue, zouk, calypso, etc.) au rayonnement international. Les musiques puisent leur énergie principalement dans l'héritage de la plantation et des quartiers populaires urbains des îles d'origine, mais aussi dans le cosmopolitisme des métropoles d'immigration. La mondialisation des musiques caribéennes s'appuie sur les puissants réseaux nord-américains de production et de diffusion, dont les communaut...

  14. La culture musicale caribéenne de New York - 09

    OpenAIRE

    Audebert, Cédric

    2012-01-01

    Le bassin caribéen est un espace de production musicale foisonnante (reggae, salsa, konpa, meringue, zouk, calypso, etc.) au rayonnement international. Les musiques puisent leur énergie principalement dans l'héritage de la plantation et des quartiers populaires urbains des îles d'origine, mais aussi dans le cosmopolitisme des métropoles d'immigration. La mondialisation des musiques caribéennes s'appuie sur les puissants réseaux nord-américains de production et de diffusion, dont les communaut...

  15. La culture musicale caribéenne de New York - 08

    OpenAIRE

    Audebert, Cédric

    2012-01-01

    Le bassin caribéen est un espace de production musicale foisonnante (reggae, salsa, konpa, meringue, zouk, calypso, etc.) au rayonnement international. Les musiques puisent leur énergie principalement dans l'héritage de la plantation et des quartiers populaires urbains des îles d'origine, mais aussi dans le cosmopolitisme des métropoles d'immigration. La mondialisation des musiques caribéennes s'appuie sur les puissants réseaux nord-américains de production et de diffusion, dont les communaut...

  16. La culture musicale caribéenne de New York - 06

    OpenAIRE

    Audebert, Cédric

    2012-01-01

    Le bassin caribéen est un espace de production musicale foisonnante (reggae, salsa, konpa, meringue, zouk, calypso, etc.) au rayonnement international. Les musiques puisent leur énergie principalement dans l'héritage de la plantation et des quartiers populaires urbains des îles d'origine, mais aussi dans le cosmopolitisme des métropoles d'immigration. La mondialisation des musiques caribéennes s'appuie sur les puissants réseaux nord-américains de production et de diffusion, dont les communaut...

  17. Políticas para transformar el capital humano en el Caribe colombiano

    OpenAIRE

    Joaquín Viloria de la Hoz

    2006-01-01

    El objetivo de la presente investigación es proponer políticas y acciones que contribuyan a mejorar el nivel del capital humano en la Costa Caribe colombiana. El diagnóstico de la educación en esta región se torna preocupante en aspectos relacionados con la cobertura, nivel de analfabetismo y calidad. Esta situación poco ayuda a acelerar el crecimiento económico de la región, ni tampoco a mejorar las condiciones de vida de su población. Si el Caribe colombiano logra estructurar una política e...

  18. CARIBE 71, UNA VARIEDAD DE CEBOLLA PARA CLIMA TROPICAL

    Directory of Open Access Journals (Sweden)

    Laura Muñoz

    2004-01-01

    Full Text Available En la Estación Experimental Agronómica de Santiago de las Vegas, actual Instituto de Investigaciones Fundamentales en Agricultura Tropical "Alejandro de Humbolt" (INIFAT del Ministerio de la Agricultura (MINAG, se desarrollaron una serie de investigaciones con el objetivo de mejorar la producción de cebolla en el país. Se determinó la problemática que presentaba el cultivo para la producción comercial y se consideró que era necesario desarrollar variedades para condiciones tropicales, de las cuales se pudiera producir la semilla en Cuba. Aplicando tratamiento de invernación a los bulbos se lograron floraciones y semillas, pudiéndose iniciar los trabajos de mejoramiento genético en esta especie, producto de los cuales se obtiene la variedad Caribe 71, de color rojo de los tipos secas picantes, con buen grado de tolerancia en condiciones de campo al hongo Alternaria porri (Ell Cif. y conservación en condiciones de almacenamiento por más de cinco meses. Su ciclo económico es de 140 días, muy estable en la producción y desarrolla bulbos de buena forma y tamaño en más del 90 % de las plantas. El potencial de rendimiento es superior a las 40 t.ha-1 y puede producirse la semilla en el país, con rendimientos entre 300 y 400 kg.ha-1, los cuales son rentables en las condiciones de Cuba.

  19. Regeneration of Pinus pinaster forests after wildfire

    OpenAIRE

    Castro, José; Bento, João Manuel; Rego, Francisco

    1990-01-01

    Wildfires are of extreme importance in Pinus pinaster forests of central and northern Portugal. Reforestation plans after wildfires are generally made without consideration for the possibility of natural regeneration. This paper addresses the question of the factors responsible for the occurrence of natural regeneration and concludes that litter accumulation, rock outcrops, slope, aspect, harvest, fire characteristics, and stand age are well related to the regeneration observed. Limitations o...

  20. Influence of xilanase treatment on Pinus pinaster kraft pulp

    OpenAIRE

    Spiridon, Iuliana; Duarte, Ana Paula; Curto, Joana

    2010-01-01

    In Portugal, pulp and paper industry uses especially two wood species, Eucalyptus globules and Pinus pinaster. The second species gives pulps with low bleachability (compared with other common softwood species, like Pinus silvester), utilised for packaging papers. It is known that treatments with different hydrolytic enzymes could improve the bleaching capacity of softwood pulp. That is why, xylanases were used to improve Pinus pinaster kraft pulp characteristics. The enzymatic hydrolysis imp...

  1. BID estima flujos de remesas a América Latina y el Caribe para 2008

    OpenAIRE

    Robert Meins; Gregory Watson; Natasha Bajuk

    2008-01-01

    Da a conocer la estimación del flujo de remesas a América y el Caribe por parte del Banco Interamericano de Desarrollo (BID). Asimismo, señala las perspectivas para las remesas desde los EEUU y España.

  2. HERPETOFAUNA DE NEGUANJE, PARQUE NACIONAL NATURAL TAYRONA, CARIBE COLOMBIANO

    Directory of Open Access Journals (Sweden)

    castellanos jeiner jesus

    2010-04-01

    Full Text Available

    La herpetofauna del Parque Nacional Tayrona (Sector Neguanje fue estudiada durante 30 días entre los meses de septiembre y octubre del 2004 por medio del método de registros de encuentros visuales, la búsqueda activa y la disposición de barreras de intercepción con trampas de caída. Se registraron 44 especies, 11 de Anfibios y 33 de Reptiles, distribuidos en 18 familias y 37 géneros. Las curvas de acumulación de especie mostraron que aproximadamente 20 días son suficientes para registrar todas las especies de lagartos, situación inversa fue observada para las especies de ranas y serpientes. El lagarto Lepidoblepharis sanctaemartae fue la especie con mayor abundancia relativa registrada en el sector, lo que implica un buen criterio potencial para su protección. Se amplia la distribución local de la especie Colosthetus ruthveni, la cual era reportada solo para la Sierra Nevada de Santa Marta desde su descripción en 1997. Finalmente, este estudio revela que el sector Neguanje presentó el 33 % de la riqueza de especies registrada para la Sierra Nevada de Santa Marta, lo que posiciona ha esta zona como una de las más representativas en cuanto a biodiversidad en el Caribe Colombiano.

  3. Comparative palynology and anatomy of pinus henryi, pinus massoniana and pinus tabulaeformis (pinaceae) and their taxonomic implications

    International Nuclear Information System (INIS)

    In the present study, micromorphological and anatomic characteristics of 3 Pinus L. taxa (Pinus henryi, P. massoniana and P. tabulaeformis) were compared. These taxa have both endemic and limited distribution in China. For the micromorphological studies, the pollens were examined using light microscopy (LM) and scanning electron microscope (SEM). For the anatomical studies, needle anatomy characteristics of the 3 taxa were studied. After the studies, new characteristics of corpus exine ornamentation had been found. Spiny on the regulate of corpus exine is presented in P. henryi while baculate on the rugulate of corpus exine is existed in P. tabuliformishave. However, there is not ornamentation on rugulate in P. massoniana. The features of pollen size, corpus exine ornamentation, number of microperforations, cappula ridges are significant to distinguish the 3 taxa. Number of resin canals, stomatal rows, epithelial cells and sheath cells, dimensions of cross section, dimensions of resin canals and width of needle are also important in separating these taxa. These studies give taxonomic support for recognizing P. henryi as an independent species closely related to P. massoniana. (author)

  4. Comparison between CARIBIC Aerosol Samples Analysed by Accelerator-Based Methods and Optical Particle Counter Measurements

    OpenAIRE

    B. G. Martinsson; J. Friberg; Andersson, S M; Weigelt, A; Hermann, M.; D. Assmann; J. Voigtländer; C. A. M. Brenninkmeijer; Velthoven, P. J. F.; Zahn, A.

    2014-01-01

    Inter-comparison of results from two kinds of aerosol systems in the CARIBIC (Civil Aircraft for the Regular Investigation of the atmosphere Based on a Instrument Container) passenger aircraft based observatory, operating during intercontinental flights at 9–12 km altitude, is presented. Aerosol from the lowermost stratosphere (LMS), the extra-tropical upper troposphere (UT) and the tropical mid troposphere (MT) were investigated. Aerosol particle volume concentration measur...

  5. Variables ambientales durante eventos de blanqueamiento coralino en el Caribe colombiano

    OpenAIRE

    Romero Rodríguez, Deisy Alejandra

    2013-01-01

    Resumen: Como consecuencia de un estrés natural o antropogénico, los corales expulsan de sus tejidos a las zooxantelas, dando lugar a un blanqueamiento que luego puede generar mortalidades masivas. Se han identificado algunas variables asociadas al blanqueamiento pero la temperatura superficial del mar (TSM) ha sido descrita como la causa principal. En el Caribe colombiano los eventos de blanqueamiento han mostrado diferencias espaciales y temporales que no han sido explicadas. Con el fin de ...

  6. Pollution plumes observed during CARIBIC flights in the upper troposphere between South China and the Philippines

    OpenAIRE

    Lai, S. C.; A. K. Baker; T. J. Schuck; P. van Velthoven; D. E. Oram; Zahn, A.; Hermann, M.; Weigelt, A; Slemr, F.; C. A. M. Brenninkmeijer

    2009-01-01

    A strong pollution episode in the upper troposphere between South China and the Philippines was observed during CARIBIC flights in April 2007. Five pollution plumes were intersected and enhancements in aerosol and trace gas concentrations including CO, CO2, CH4, non-methane hydrocarbons (NMHCs) and halocarbons were observed along the flight tracks during four sequential flights. The importance of the contribution of biomass burning was investigate...

  7. NO and NOy in the upper troposphere: Nine years of CARIBIC measurements onboard a passenger aircraft

    OpenAIRE

    Stratmann, Greta; Ziereis, Helmut; Stock, Paul; Brenninkmeijer, C.A.; Zahn, A.; Rauthe-Schöch, A.; van Velthoven, Peter; Schlager, Hans; A. Volz-Thomas

    2016-01-01

    Nitrogen oxide (NO and NOy) measurements were performed onboard an in-service aircraft within the framework of CARIBIC (Civil Aircraft for the Regular Investigation of the atmosphere Based on an Instrument Container). A total of 330 flights were completed from May 2005 through April 2013 between Frankfurt/Germany and destination airports in Canada, the USA, Brazil, Venezuela, Chile, Argentina, Colombia, South Africa, China, South Korea, Japan, India, Thailand, and the Philippines....

  8. CARIBIC observations of gaseous mercury in the upper troposphere and lower stratosphere

    Directory of Open Access Journals (Sweden)

    Slemr F.

    2013-04-01

    Full Text Available A unique set of gaseous mercury measurements in the upper troposphere and lower stratosphere (UT/LS has been obtained during the monthly CARIBIC (www.caribic-atmospheric.com flights since May 2005. The passenger Airbus 340-600 of Lufthansa covered routes to the Far East, North America, India, and the southern hemisphere. The accompanying measurements of CO, O3, NOy, H2O, aerosols, halocarbons, hydrocarbons, greenhouse gases, and several other parameters as well as backward trajectories enable a detailed analysis of these measurements. Speciation tests have shown that the CARIBIC measurements represent a good approximation of total gaseous mercury (TGM concentrations. Above the tropopause TGM always decrease with increasing potential vorticity (PV and O3 which implies its conversion to particle bound mercury. The observation of the lowest TGM concentrations at the highest particle concentrations in the stratosphere provides further evidence for such conversion. We will show how a seasonally dependent conversion rate could be derived using concomitantly measured SF6 mixing ratios as a timer. Tropospheric mercury data suggest the existence of a decreasing trend in the northern hemisphere whose size is comparable with the trend derived from long-term measurements by ship cruises, at Cape Point (South Africa and Mace Head (Ireland.

  9. Fire effects in Pinus uncinata Ram plantations

    Directory of Open Access Journals (Sweden)

    Adrián Cardil Forradellas

    2016-04-01

    Full Text Available Aim of study: Understanding fire ecology of main forest species is essential for a sound, scientifically based on managing of wildlands and also to assess likely implications due to changes in fire regime under a global change scenario. Few references can be found about fire ecology of Pinus uncinata Ram. (PU. PU species grows in the Central Pyrenees where large, severe wildland fires did not occur frequently in the past. However, several fires with extreme fire behavior have affected PU stands in last years and they might disturb other PU forest in the future.Area of study: Cabdella fire (February 2012, in Lleida province, is one of the several wildland fires occurred in 2012 (winter season in the Central Pyrenees. Fire affected a large PU plantation (102 ha located at 1.800-2,100 meters above the sea.Material and methods: We have analyzed first order fire effects in three fireline intensity thresholds along three years in terms of mortality ratio, scorched height, percentage of scorched crown volume and bark char height.Main results: PU seems to be a very tolerant species to low and medium fire line intensity but fire effects were very significant when fire line intensity was high. In medium fireline intensity sites, probability of mortality ranged from 15 to 30% and the dead trees had the highest values on scorched height and percentage of scorched crown volume.Research highlights: Results from this work supports that prescribed burning might be used to efficiently decrease fuel load and fuel vertical continuity while avoiding considerable PU mortality. It also displayed that when fuel management has been implemented, PU mortality might be limited even under extreme fire behavior.Abbreviations used: PU: Pinus uncinata Ram.

  10. Asociación de Estados del Caribe: ¿Hacia qué regionalización?

    OpenAIRE

    Bello, Lourdes María Regueiro

    2013-01-01

    Note portant sur l’auteur Introducción El decenio de los noventa se ha iniciado con la revitalización de los esquemas de integración en América Latina y el Caribe en los marcos de un nuevo entorno regional, hemisférico y mundial al que algunos teóricos llaman “nuevo orden mundial”. En el ámbito regional, un complejo entramado de viejos y nuevos esquemas emerge como expresión de los “nuevos aires” que asisten a la integración de América Latina y el Caribe. La Asociación de Estados del Caribe (...

  11. Informe final de la Consulta sobre gestión ambiental en América Latina y el Caribe

    OpenAIRE

    Banco Interamericano de Desarrollo (BID); Programa de las Naciones Unidas para el Desarrollo (PNUD); Programa de las Naciones Unidas para el Medio Ambiente (PNUMA)

    1998-01-01

    El presente documento representa el informe final de la Consulta sobre Gestión Ambiental en América Latina y el Caribe realizada en Washington, D.C., entre el 17 y el 18 de septiembre de 1998, que fue organizada por el Comité Técnico Interagencial del Foro de Ministros de Medio Ambiente de América Latina y el Caribe. La Consulta fue fruto de las decisiones de la XI Reunión del Foro de Ministros de Medio Ambiente de América Latina y el Caribe en 1998. Allí se definió la gestión ambiental como ...

  12. Sismicidad y Tectónica en el Límite de Placas del Caribe: Noreste de Venezuela e Hispaniola

    OpenAIRE

    Villaseñor Hidalgo, Antonio

    1995-01-01

    [spa] En este trabajo se analiza la sismotectónica de dos regiones situadas en el límite de placas del Caribe: el noreste de Venezuela en el límite Caribe-América del Sur y el noreste de Hispaniola en límite Caribe-América del Norte. Ambas zonas se caracterizan porque en ellas el límite de placas está constituido por una amplia zona de deformación (zona de límite de placas), y compuesto por varios elementos o terranos. Los datos utilizados en este estudio son de tres tipos: sismogramas histór...

  13. Some soil properties and microbial biomass of Pinus maritima, Pinus pinea and Eucalyptus camaldulensis from the Eastern Mediterranean coasts

    OpenAIRE

    Nacide Kizildag; Husniye Aka Sagliker; Ahu Kutlay; Sahin Cenkseven; Cengiz Darici

    2012-01-01

    Background: Salt-affected soils occupy wide areas that have ecological importance in semi-arid and arid regions. Excessive amounts of salt have adverse effects on soil physical and chemical properties and also on the microbiological processes. The soils of Pinus maritima, Pinus pinea, and Eucalyptus camaldulensis were found to be under salinity stress in the present study area. Thus, the carbon, nitrogen, phosphorus contents, microbial biomass, and carbon mineralization were determined in the...

  14. Islas de tierra firme: ¿un modelo para el Caribe continental? El caso de Yucatán

    OpenAIRE

    Margaret Shrimpton Masson

    2015-01-01

    La Península de Yucatán, al extremo oriente de Mexico, suele ser representada como “el país que no se parece a otro”, o incluso, como una isla. Este artículo aborda dos puntos clave en torno a Yucatán y su relación con el espacio nacional/regional: su insularidad y la existencia/pertenencia al Caribe continental. El primero, considera la idea de la isla y sus límites para entender a la región Caribe como espacio que demuestra una articulación entre isla-contine...

  15. La innovación en la industria manufacturera de la Región Caribe Colombiana

    OpenAIRE

    Barrios Aguirre, Fernando; Cárcamo Vergara, Carolina

    2013-01-01

    Este documento analiza los principales determinantes del desempeño innovador en las firmas manufactureras de la Región Caribe colombiana. Se construye un modelo de regresión a tres niveles que relaciona variables a nivel firma, sector y región. La hipótesis central es que algunos de los determinantes específicos de la innovación que propone la literatura internacional aplican y se comprueban para el caso de la Región Caribe colombiana. El análisis se basa principalmente en datos de la Cuarta ...

  16. ¿En busca de una Pax Americana? La Cuenca del Caribe como el Mare Nostrum estadounidense.

    OpenAIRE

    Coronado Holman

    2012-01-01

    La periodización de la política exterior norteamericana frente a los Estados que componen la Cuenca del Caribe, permite formar una imagen de las conductas e identidades que se han tenido y aún se tienen con respecto a la inserción, participación e inclusión de Estados Unidos en el policy-making interno de la Cuenca del Caribe. Esta forma de hacer política de Estados Unidos ha sido cambiante y altamente influenciada por la idea de la estabilidad y control hemisférico que siempre ha pretendido...

  17. Evolución Geológica del margen norte de la placa del caribe, República Dominicana

    OpenAIRE

    Tavares, I; Hernáiz Huerta, P. P.; Pérez-Estaún, Andrés; García Cortés, A.

    2002-01-01

    La Isla La Española se encuentra situada en la actualidad en la parte septentrional de la Placa del Caribe. Conjuntamente con Puerto Rico, constituye una unidad que puede interpretarse como una microplaca, limitada al Norte por una zona de subducción oblicua, con una fuerte componente de salto en dirección, y al Sur por otra zona de subducción incipiente a la que se asocia la Fosa de los Muertos. El margen Norte de la Placa del Caribe ha evolucionado desde constituir un límite contro...

  18. 90SR uptake by Pinus ponderosa and Pinus radiata seedlings inoculated with ectomycorrhizal fungi

    International Nuclear Information System (INIS)

    Strontium-90 (90Sr) is a radionuclide characteristic of fallout from nuclear reactor accidents and nuclear weapons testing. Prior studies have shown that Pinus ponderosa and P. radiata seedlings can remove appreciable quantities of 90Sr from soil and store it in plant tissue. In this study, we inoculated P. ponderosa and P. radiata seedlings with one of five isolates of ectomycorrhizal fungi. Inoculated and noninoculated (control) seedlings were compared for their ability to remove 90Sr from an organic growth medium. Ectomycorrhizal P. ponderosa and P. radiata seedlings are able to remove 3-5 times more 90Sr from contaminated soil than seedlings without ectomycorrhizae. (Author)

  19. CARIBIC aircraft measurements of Eyjafjallajökull volcanic plumes in April/May 2010

    Directory of Open Access Journals (Sweden)

    A. Rauthe-Schöch

    2011-06-01

    Full Text Available The Civil Aircraft for the Regular Investigation of the Atmosphere Based on an Instrument Container (CARIBIC project investigates physical and chemical processes in the Earth's atmosphere using a Lufthansa Airbus long-distance passenger aircraft. After the beginning of the explosive eruption of the Eyjafjallajökull volcano on Iceland on 14 April 2010, the first CARIBIC volcano-specific measurement flight was carried out over the Baltic Sea and Southern Sweden on 20 April. Two more flights followed: one over Ireland and the Irish Sea on 16 May and the other over the Norwegian Sea on 19 May 2010. During these three special mission flights the CARIBIC container proved its merits as a versatile and comprehensive flying laboratory. The elemental composition of particles collected over the Baltic Sea during the first flight (20 April indicated the presence of volcanic ash. Over Northern Ireland and the Irish Sea (16 May, the DOAS system detected SO2 and BrO co-located with volcanic ash particles that increased the aerosol optical depth. Over the Norwegian Sea (19 May, the optical particle counter detected a strong increase of particles larger than 400 nm diameter in a region where ash clouds were predicted by aerosol dispersion models. Aerosol particle samples collected over the Irish Sea and the Norwegian Sea showed large relative enhancements of the elements silicon, iron, titanium and calcium. Non-methane hydrocarbon concentrations in whole air samples collected on 16 May and 19 May 2010 showed a pattern of removal of several hydrocarbons that is typical for chlorine chemistry in the plumes. Comparisons of measured ash concentrations and simulations with the FLEXPART dispersion model demonstrate the difficulty of detailed volcanic ash dispersion modelling due to the large variability of the volcanic plume sources, extent and patchiness as well as the thin ash layers formed in the volcanic plumes.

  20. Los encuentros lésbicos feministas latinoamericanos y del Caribe en la era del postfeminismo

    OpenAIRE

    Mogrovejo Aquise Norma

    2011-01-01

    El próximo VIII Encuentro Lésbico Feminista Latinoamericano y del Caribe a realizarse en Guatemala, plantea tanto para el movimiento lésbico como para el movimiento feminista y homosexual importantes retos para la discusión teórica y la reformulación de agendas. En un contexto en que el postfeminismo ha cuestionado la centralidad del sujeto mujer en la política feminista, las lesbianas latinoamericanas discutirán los efectos del neocolonialismo en las políticas identitarias y el feminicidio e...

  1. Transport of NMHCs and halocarbons observed by CARIBIC: A case study

    Science.gov (United States)

    Baker, A. K.; Brenninkmeijer, C. A. M.; Oram, D. E.; O'Sullivan, D. A.; Schuck, T. J.; Slemr, F.

    2009-04-01

    The CARIBIC project (Civil Aircraft for the Regular Investigation of the Atmosphere Based on an Instrument Container) involves the monthly deployment of an instrument container equipped to make atmospheric measurements from onboard a long-range commercial airliner. Since December 2004, flights for the second phase of CARIBIC have been aboard a Lufthansa Airbus A340-600 traveling between Frankfurt, Germany and destinations in Asia, North America and South America. The instrument package housed in the container is fully automated and during each flight carries out a variety of real-time trace gas and aerosol measurements, and also collects 28 air samples, which are analyzed upon return to the laboratory. Routine measurements made from the sampling flasks include greenhouse gases, nonmethane hydrocarbons (NMHCs), and halocarbons; results of air sample analysis form the basis for the data discussed here. While the majority of CARIBIC samples represent background free tropospheric air and air representative of the upper troposphere/lower stratosphere, the aircraft also, less frequently, encounters air parcels influenced by more recent emissions. Here we present a case study of a round-trip flight between Frankfurt and Toronto, Canada during September 2007. During this flight, different air masses of unique origin were encountered; a number of samples were influenced by transport from the Gulf of Mexico, while others had source regions in Central and Southeast Asia. Samples from the Gulf of Mexico exhibited enhancements in C3-C6 alkanes, as well as a number of halogenated compounds with oceanic sources, such as methyl iodide and bromoform, while Asian samples had enhanced levels of combustion products (CO, acetylene, benzene) and anthropogenic halocarbons (methlyene chloride, chloroform, perchloroethylene). Additionally, a number of samples also showed stratospheric influence, and these samples were characterized by relatively depleted levels of many of the compounds

  2. Lista de especies de dinoflagelados (Dinophyta) registrados en el mar Caribe colombiano

    OpenAIRE

    Lozano Duque, Y.; Alfonso Vidal, L.; Navas S., G. R.

    2011-01-01

    Se presenta un listado de especies de dinoflagelados marinos registrados en la zona costera y oceánica del mar Caribe colombiano. Este listado se basa en la revisión de información disponible de estudios sobre la comunidad fitoplanctónica. Se registran un total de 186 taxones correspondientes a 169 especies con 27 variedades y seis formas. Estos se agrupan en 32 géneros, 17 familias, seis órdenes y dos clases. La clasificación taxonómica se basó en el sistema propuesto por Fensome...

  3. Miasis nosocomiales en América Latina y el Caribe: ¿una realidad ignorada?

    OpenAIRE

    Rocío Sánchez-Sánchez; Ólger Calderón-Arguedas; Nury Mora-Brenes; Adriana Troyo

    2014-01-01

    Las miasis nosocomiales son infestaciones por larvas de mosca que se producen después de la hospitalización del paciente. Para analizar la información disponible sobre miasis nosocomiales en América Latina y el Caribe, se realizó una búsqueda de casos publicados en los últimos 52 años. Se encontraron nueve casos clínicos en Brasil, Costa Rica, Guayana Francesa, Honduras y Jamaica. También existen dos publicaciones con datos agregados que mencionan 139 casos en El Salvador y alrededor de 32 en...

  4. Turismo, globalización y medio ambiente en el Caribe mexicano

    OpenAIRE

    Juan Córdoba y Ordóñez; Ana García de Fuentes

    2003-01-01

    Globalización y turismo adquieren la connotación de sinónimos en el Caribe mexicano, que en los últimos 30 años ha pasado de ser un territorio de frontera, prácticamente despoblado, a recibir más de seis millones de visitantes anuales. A partir de los patrones de ocupación territorial generados por la actividad turística -identificados en trabajo de campo mediante un análisis fisionómico- se analizan algunas implicaciones de la compleja relación que guarda el turismo con el des...

  5. Plagas, enfermedades y saberes agrícolas en el Caribe, un estudio de caso

    Directory of Open Access Journals (Sweden)

    Fernández Prieto, Leida

    2011-08-01

    Full Text Available From the new approaches in social studies of science and technology concerned with the analysis of sites where science is developed and how it circulates, I am interested to observe the Caribbean as an island-center in the tropical agronomic knowledge development. For this, I study how the scientific steps were formulated to eradicate the plagues that currently affect more intensely coconut plantations in the Caribbean and Latin America, called Lethal Yellowing Disease of Coconut, which has destroyed the industry crops in many areas. The epidemic first appeared in the nineteenth century in the Caribbean Antilles, which forced local scientists to develop a database of global knowledge. In particular, I observe the process in Cuba from scientific discussions generated at the Royal Academy of Medical Sciences, Physical and Natural Sciences of Havana, as well as the entry of U.S. scientists in the new imperial context of early twentieth century, who expanded their field of study throughout the English and Spanish Caribbean through the exchange of ideas and experiences.

    A partir de los nuevos enfoques en los estudios sociales de la ciencia y la tecnología interesados en el análisis de los sitios donde se produce la ciencia y cómo circula, me interesa observar el Caribe como isla-centro en la construcción del saber agronómico tropical. Para ello estudio cómo se fueron formulando científicamente los pasos a seguir para erradicar una de las plagas que actualmente afectan con más intensidad las plantaciones de cocos del Caribe y América Latina, llamada Amarillamiento Letal del Cocotero (ALC, la cual ha destruido la industria de la copra en muchas zonas productoras. La epidemia apareció por vez primera en el siglo XIX en el Caribe antillano, donde obligó a los científicos locales a elaborar un sistema de conocimiento global. En particular, observo ese proceso en Cuba a partir de los debates científicos generados en la Real

  6. Vulnerabilidad, pobreza y desastres ´socionaturales´ en Centroamérica y El Caribe

    OpenAIRE

    Salas Serrano, Julián

    2007-01-01

    [ES] El trabajo pretende el estudio y cuantifi cación del riesgo relativo en una geografía física propensa a los fenómenos naturales y con una alta proporción de población en situación de pobreza habitacional, del que se deduce que el riesgo en la zona conformada por nueve países –de Centroamérica y el Caribe- es extraordinariamente superior a la media mundial. Del primer aspecto se ocupan los apartados relativos a delimitar el ‘Área de Estudio’: fenómenos naturales...

  7. Las PYMES y las exportaciones: una perspectiva de América Latina y el Caribe

    OpenAIRE

    Suominen, Kati; Volpe Martincus, Christian

    2013-01-01

    Es sabido que, a pesar de las mejoras que tuvieron lugar en los últimos años, las exportaciones de varios países de América Latina y el Caribe aún se encuentran por debajo de su potencial y de lo que cabría esperar en función de sus niveles de desarrollo. Lo mismo sucede con el grado de diversificación de sus exportaciones (Blyde et al., 2014). Asimismo, su participación en las cadenas globales de valor también parece ser relativamente limitada (Blyde y Volpe Martincus, 2011). Esto es importa...

  8. Fusariose em Mudas de Pinus taeda Fusarium disease on Pinus taeda seedlings

    Directory of Open Access Journals (Sweden)

    Albino Grigoletti Júnior

    2011-03-01

    Full Text Available

    Viveiros comerciais têm apresentado mudas de Pinus taeda com sintomas de murcha e seca de ponteiros e morte, na Região Sul do Brasil. Isolamento em meio BDA e câmara úmida, teste de patogenicidade e microcultivo foram feitos para identificar o patógeno. Uma espécie de Fusarium foi isolada, cuja identificação encontra-se em andamento. Verificou-sepelos postulados de Koch que Fusarium sp. foi o agente causal dessa doença.
    Nurseries has presented Pinus taeda seedling with symptoms of wilt, tip blight and death, in Southern Region of Brazil. Isolation on PDA medium, moist chamber, pathogenicity test and microculture were made to identify the pathogen. A species of Fusarium was isolated, which is under identification. It was verified by Koch postulates that Fusarium sp. was the causal agent of this disease.

  9. Didymozoid Monilicaecum type trematodes in chaetognaths from the Mexican Caribbean Sea Tremátodos didimozoides tipo Monilicaecum en quetognatos del mar caribe mexicano

    Directory of Open Access Journals (Sweden)

    María del Carmen Gómez del Prado-Rosas

    2007-12-01

    Full Text Available Analyses of 22,508 holoplanktonic chaetognaths collected at 21 stations were made from four oceanographic campaigns along the coasts of Quintana Roo, Mexico, in 1991 (Caribe I = February; Caribe II = March; Caribe III = May; Caribe IV= August. Unencysted larval didymozoid parasites were identified as belonging to the Monilicaecum type because of the arrangement of the chambers of the heavily twisted intestinal caeca, which occupy nearly the entire body. These larvae were found in the coelom of seven individuals of the chaetognath Flaccisagitta enflata (prevalence = 0.03, mean intensity = 1 and in two of Serratosagitta serratodentata (prevalence = 0.009, mean intensity = 1. The Mexican Caribbean Sea is reported as a new locality for this type of helminth larvae.Se analizan 22,508 quetognatos holoplánticos capturados en 21 estaciones a lo largo de las costas del estado de Quintana Roo, México durante 1991 (Caribe I= febrero; Caribe II= marzo; Caribe III mayo; Caribe IV= agosto. Las formas no enquistadas de los parásitos didimozoides fueron identificadas como tipo Monilicaecum debido al arreglo de las cámaras de los ciegos intestinales fuertemente sinuosas que ocupan casi la totalidad de la cavidad corporal. Las larvas tipo Monilicaecum fueron encontradas en el celoma de siete quetognatos de la especie Flaccisagitta enflata (prevalencia= 0.03; intensidad promedio de parasitismo = 1 y en dos ejemplares de Serratosagitta serratodentata (prevalencia = 0.009, intensidad promedio = 1. El mar caribe mexicano es registrado como una nueva localidad para esta larva de helminto.

  10. El Caribe desde España.Curaduría, identidad regional y postcolonialidad en el espacio ibérico

    OpenAIRE

    Garrido Castellano, Carlos

    2015-01-01

    El presente artículo analiza tres exposiciones de arte caribeño organizadas en España entre los años 90 y la década del 2000: Caribe Insular: Exclusión, Fragmentación y Paraíso; Islas; y Utrópicos. Centroamérica y Caribe. XXXI Bienal de Pontevedra. A través de la revisión de los presupuestos curatoriales presentes en cada proyecto, el texto problematizará la relación entre las diferentes identidades regionales y nacionales, las políticas institucionales y los discursos ex...

  11. Comparison between CARIBIC aerosol samples analysed by accelerator-based methods and optical particle counter measurements

    Directory of Open Access Journals (Sweden)

    B. G. Martinsson

    2014-04-01

    Full Text Available Inter-comparison of results from two kinds of aerosol systems in the CARIBIC (Civil Aircraft for the Regular Investigation of the atmosphere Based on an Instrument Container passenger aircraft based observatory, operating during intercontinental flights at 9–12 km altitude, is presented. Aerosol from the lowermost stratosphere (LMS, the extra-tropical upper troposphere (UT and the tropical mid troposphere (MT were investigated. Aerosol particle volume concentration measured with an optical particle counter (OPC is compared with analytical results of the sum of masses of all major and several minor constituents from aerosol samples collected with an impactor. Analyses were undertaken with accelerator-based methods particle-induced X-ray emission (PIXE and particle elastic scattering analysis (PESA. Data from 48 flights during one year are used, leading to a total of 106 individual comparisons. The ratios of the particle volume from the OPC and the total mass from the analyses were in 84% within a relatively narrow interval. Data points outside this interval are connected with inlet-related effects in clouds, large variability in aerosol composition, particle size distribution effects and some cases of non-ideal sampling. Overall, the comparison of these two CARIBIC measurements based on vastly different methods show good agreement, implying that the chemical and size information can be combined in studies of the MT/UT/LMS aerosol.

  12. Greenhouse gas analysis of air samples collected onboard the CARIBIC passenger aircraft

    Science.gov (United States)

    Schuck, T. J.; Brenninkmeijer, C. A. M.; Slemr, F.; Xueref-Remy, I.; Zahn, A.

    2009-08-01

    CARIBIC (Civil Aircraft for the Regular Investigation of the atmosphere Based on an Instrument Container) is a long-term atmospheric measurement program based on the use of a comprehensive scientific instrument package aboard a commercial passenger aircraft. In addition to real-time measurements, whole air sampling is performed regularly at cruising altitudes in the tropical middle troposphere and the extra-tropical UT/LS region. Air samples are analyzed for greenhouse gases, NMHCs, halocarbons, and trace gas isotopic composition. The routinely performed greenhouse gas analysis comprises gas chromatography measurements of CO2, CH4, N2O and SF6. The air sampling procedure, the GC system and its performance are described. Comparisons with similar systems employed in other laboratories and a comparison with results from a CO2 in-situ analyzer that is also part of the CARIBIC instrumentation are shown. In addition, the time series of CO2, obtained from the collection of 684 samples at latitudes between 30° N and 56° N on 21 round trips out of Germany to different destinations in Asia between November 2005 and October 2008, is presented. A time shift in the seasonal cycle of about one month was observed between the upper troposphere and the tropopause region. For two sets of return flights from Germany to the Philippines the relationship between the four greenhouse gases is briefly discussed.

  13. Ethnobotanical survey of the medicinal flora used by the Caribs of Guatemala.

    Science.gov (United States)

    Girón, L M; Freire, V; Alonzo, A; Cáceres, A

    1991-09-01

    An ethnobotanical survey was conducted among the Carib population of Guatemala in 1988-1989. In general terms, the sample surveyed possessed a relatively good standard of living. Results indicated that health services were utilized by the population, and that domestic medicine, mainly plants (96.9%) was used by 15% of the population. One hundred and nineteen plants used for medicinal purposes were collected, of which 102 (85.7%) could be identified; a list of these together with the information provided for each plant is presented. The most frequently reported plants used as medicine are: Acalypha arvensis, Cassia alata, Cymbopogon citratus, Melampodium divaricatum. Momordica charantia, Neurolaena lobata, Ocimum basilicum, Petiveria alliacea and Solanum nigrescens. Most of these plants are found in the region, but some are brought from the Highlands or outside of the country, such as Malva parviflora, Matricaria chamomilla, Peumus boldus, Pimpinella anisum, Rosmarinus officinalis and Tagetes lucida. This survey demonstrated that the Carib population of Guatemala has survived in a transcultural environment of African and native Amerindian beliefs. PMID:1795521

  14. Educación inclusiva en América Latina y el Caribe

    Directory of Open Access Journals (Sweden)

    Rosa BLANCO GUIJARRO

    2011-11-01

    Full Text Available América Latina y el Caribe se caracterizan por ser la región del mundo más inequitativa y por poseer sociedades altamente segmentadas, lo que afecta la educación de la población, su integración y cohesión social. Ampliar las oportunidades de todos para acceder a una educación de calidad y desarrollar escuelas más inclusivas, que eduquen en y para la diversidad, se destacan como dos estrategias potentes para avanzar hacia sociedades más justas y democráticas en América Latina. En este trabajo se presenta un análisis detallado de la situación educativa de la región desde la perspectiva del enfoque de derechos y de inclusión, prestando especial atención a las personas y grupos que sufren en mayor medida las consecuencias de las desigualdades, exclusión y marginación. Dicho análisis comienza con un balance de los progresos y desafíos pendientes en relación con el acceso, permanencia, calidad y equidad de la educación en la región de América Latina. En la segunda parte se abordan los grandes temas de la agenda de la Inclusión en América Latina y el Caribe.

  15. An interesting chemical polymorphism in Pinus sylvestris L.

    Directory of Open Access Journals (Sweden)

    Jerzy Szweykowski

    2014-02-01

    Full Text Available Intra- and interpopulational polymorphism in the production of phenolic compounds is described in Polish populations of Pinus sylvestris L. Two mutually exclusive forms of pine trees are present in changing proportions in all populations studied. This allows three groups of populations to be distinguished. The character of this differentiation is discussed.

  16. Antifungal metabolites from fungal endophytes of Pinus strobus

    DEFF Research Database (Denmark)

    Sumarah, Mark W; Kesting, Julie R; Sørensen, Dan;

    2011-01-01

    The extracts of five foliar fungal endophytes isolated from Pinus strobus (eastern white pine) that showed antifungal activity in disc diffusion assays were selected for further study. From these strains, the aliphatic polyketide compound 1 and three related sesquiterpenes 2-4 were isolated...

  17. Charcoal production from Pinus species in the laboratory

    Energy Technology Data Exchange (ETDEWEB)

    Brito, J.O.; Barrichelo, L.E.G.; Pontinha, A.A.S.

    1978-01-01

    Charcoal produced from wood of Pinus strobus var. chiapensis (13 years old) and P. elliottii var. elliotti (15 years old) was compared with charcoal from Eucalyptus maculata and E. camaldulensis (both 4-5 year old). Although their charcoal was inferior to E. maculata charcoal in several respects, both pine species produced better charcoal than E. camaldulensis.

  18. Evolution of genome size and complexity in Pinus.

    Directory of Open Access Journals (Sweden)

    Alison M Morse

    Full Text Available BACKGROUND: Genome evolution in the gymnosperm lineage of seed plants has given rise to many of the most complex and largest plant genomes, however the elements involved are poorly understood. METHODOLOGY/PRINCIPAL FINDINGS: Gymny is a previously undescribed retrotransposon family in Pinus that is related to Athila elements in Arabidopsis. Gymny elements are dispersed throughout the modern Pinus genome and occupy a physical space at least the size of the Arabidopsis thaliana genome. In contrast to previously described retroelements in Pinus, the Gymny family was amplified or introduced after the divergence of pine and spruce (Picea. If retrotransposon expansions are responsible for genome size differences within the Pinaceae, as they are in angiosperms, then they have yet to be identified. In contrast, molecular divergence of Gymny retrotransposons together with other families of retrotransposons can account for the large genome complexity of pines along with protein-coding genic DNA, as revealed by massively parallel DNA sequence analysis of Cot fractionated genomic DNA. CONCLUSIONS/SIGNIFICANCE: Most of the enormous genome complexity of pines can be explained by divergence of retrotransposons, however the elements responsible for genome size variation are yet to be identified. Genomic resources for Pinus including those reported here should assist in further defining whether and how the roles of retrotransposons differ in the evolution of angiosperm and gymnosperm genomes.

  19. Literatura del caribe. De Martinica a Colombia cruce de caminos en el mar

    Directory of Open Access Journals (Sweden)

    Patrick Bouletreau

    2014-03-01

    Full Text Available En el ambiente de internacionalización quo se vive hoy en día, las letras no pueden quedarse atrás. La Literatura Comparada llega a punto para participar de este movimiento y, tratándose de literatura del Caribe, el material es amplio: diversos mundos se abren ante nuestros ojos, cada uno con sus características: Inglaterra, Holanda, Francia y España dejaron sus huellas, África trajo su parte de magia, los rasgos autóctonos perduran. En esta Óptica, al poner de evidencia similitudes de idiosincrasia, contribuimos a reforzar unas relaciones interculturales: en este caso, nuestra región colombiana con una isla antillana francófona.

  20. Democratización y desigualdades en América Latina y el Caribe

    OpenAIRE

    Laurence WHITEHEAD

    2005-01-01

    El tema central de este artículo es una paradoja. La paradoja de que América Latina y el Caribe son, tal vez, unas de las zonas del mundo de mayor progreso en el campo de la democratización, entendido éste de manera clásica y formal. Si la comparamos con África, con Asia, con los países ex-soviéticos, o con Oriente Medio, podemos comprobar que su desarrollo democrático ha sido estelar en los últimos 20 años. Sin embargo, en el terreno de la lucha contra la pobreza y las d...

  1. Pollution plumes observed during CARIBIC flights in the upper troposphere between South China and the Philippines

    Directory of Open Access Journals (Sweden)

    S. C. Lai

    2009-10-01

    Full Text Available A strong pollution episode in the upper troposphere between South China and the Philippines was observed during CARIBIC flights in April 2007. Five pollution plumes were intersected and enhancements in aerosol and trace gas concentrations including CO, CO2, CH4, non-methane hydrocarbons (NMHCs and halocarbons were observed along the flight tracks during four sequential flights. The importance of the contribution of biomass burning was investigated using chemical tracers, emission factor analysis, back-trajectory analysis and satellite images. The Indochinese peninsula was identified as the probable source region of biomass/biofuel burning. However, enhancements in the urban/industrial tracer C2Cl4 in the plumes also indicate a substantial contribution from anthropogenic emissions. An estimation of the anthropogenic component of CO shows that biomass/biofuel burning contributed 44–63% to the intersected plumes.

  2. Fortaleciendo las capacidades presupuestarias de los Parlamentos en América Latina y el Caribe

    OpenAIRE

    Carlos Santiso; Marco Varea

    2013-01-01

    En la última década, los Parlamentos han mostrado cada vez más interés y han tenido más protagonismo en el proceso presupuestario al demandar mayor información sobre el desempeño del gobierno en su gestión de los recursos públicos. Sin embargo, en América Latina y el Caribe los Parlamentos evidencian desafíos para intervenir en el proceso presupuestario y las políticas fiscales. Su capacidad de incidencia en materia presupuestaria -y más generalmente en la política fiscal y la gestión financi...

  3. Una mirada femenina al Caribe del siglo XIX. Epistolario de Elizabeth Gross

    Directory of Open Access Journals (Sweden)

    Germán Cardozo Galué

    2009-01-01

    Full Text Available Este artículo analiza el libro de Elizabeth Gross publicado en 1921 y que describe pormenores de su estancia en Maracaibo y sus alrededores entre 1883 y 1896. A través de los relatos de la alemana el autor se acerca a la vida cotidiana y las representaciones sociales en una ciudad puerto del Caribe. Se hace especial énfasis en la adaptación a las novedades del clima, alimentación, enfermedades, relaciones con la población autóctona y proceso de criollización. Así mismo se resalta la contribución de los alemanes en la consolidación de la base originaria de la actual sociedad criolla en el occidente de Venezuela.

  4. Turismo, globalización y medio ambiente en el Caribe mexicano

    Directory of Open Access Journals (Sweden)

    Juan Córdoba y Ordóñez

    2003-01-01

    Full Text Available Globalización y turismo adquieren la connotación de sinónimos en el Caribe mexicano, que en los últimos 30 años ha pasado de ser un territorio de frontera, prácticamente despoblado, a recibir más de seis millones de visitantes anuales. A partir de los patrones de ocupación territorial generados por la actividad turística -identificados en trabajo de campo mediante un análisis fisionómico- se analizan algunas implicaciones de la compleja relación que guarda el turismo con el desarrollo, en términos humanos y no sólo económicos, y con el medio natural y cultural caracterizado en la región por una gran diversidad y, al mismo tiempo, por una gran fragilidad.

  5. Flux Calculation Using CARIBIC DOAS Aircraft Measurements: SO2 Emission of Norilsk

    Science.gov (United States)

    Walter, D.; Heue, K.-P.; Rauthe-Schoech, A.; Brenninkmeijer, C. A. M.; Lamsal, L. N.; Krotkov, N. A.; Platt, U.

    2012-01-01

    Based on a case-study of the nickel smelter in Norilsk (Siberia), the retrieval of trace gas fluxes using airborne remote sensing is discussed. A DOAS system onboard an Airbus 340 detected large amounts of SO2 and NO2 near Norilsk during a regular passenger flight within the CARIBIC project. The remote sensing data were combined with ECMWF wind data to estimate the SO2 output of the Norilsk industrial complex to be around 1 Mt per year, which is in agreement with independent estimates. This value is compared to results using data from satellite remote sensing (GOME, OMI). The validity of the assumptions underlying our estimate is discussed, including the adaptation of this method to other gases and sources like the NO2 emissions of large industries or cities.

  6. Nasal deformities. Clinical assessment and Management in Hospital Universitario del Caribe. Cartagena. Colombia

    Directory of Open Access Journals (Sweden)

    Alcalá-Cerra Liliana

    2012-06-01

    Full Text Available Introduction: Septorhinoplasty is an operative procedure indicated for surgicalmanagement of nasal deformities, and one of the most frequently performed surgicalprocedures in otolaryngology.Objective: To identify clinical features and management of non traumaticand posttraumatic nasal deformities.Methodology: An observational, descriptive, retrospective study of all surgical casesto address non traumatic and post-traumatic nasal deformity at Hospital Universitariodel Caribe, Cartagena, Colombia is presented. Socio-demographic, assessment,management and evolution data were obtained and analyzed.Results: Eighteen patients were treated surgically for posttraumatic nasal deformitiesand 13 with non-traumatic deformities. The difference in time to progression waslower in patients with traumatic deformities. The main complaint was nasal obstructionand most common deformity were laterorrinia in both groups. Patients without nasaltrauma had more caudal deviations (p = 0.047 and saddle nose. Most procedureswere septorhinoplasties with turbinoplasty with closed approaches. There were fewcomplications, with results comparable to those reported in previous series.Conclusions: There was no difference between clinical features and management ofnasal deformities, other than progression time was shorter in the traumatic ones. Atthe Hospital Universitario del Caribe the most often surgical approach was closed.RESUMEN:Introducción: la septorrinoplastia es el procedimiento operatorio indicado para elmanejo quirúrgico de las deformidades nasales, y una de las intervenciones quirúrgicasmás frecuentemente realizadas en otorrinolaringología.Objetivo: identificar las características clínicas y de manejo de las deformidadesnasales postraumáticas y no traumáticas.Metodología: estudio observacional, descriptivo, retrospectivo, de todos los casostratados quirúrgicamente para solucionar deformidad nasal postraumática y notraumática en el Hospital Universitario

  7. Characterization of non-methane hydrocarbons in Asian summer monsoon outflow observed by the CARIBIC aircraft

    Directory of Open Access Journals (Sweden)

    A. K. Baker

    2010-07-01

    Full Text Available Between April and December 2008 the CARIBIC commercial aircraft conducted monthly measurement flights between Frankfurt, Germany and Chennai, India. These flights covered the period of the Asian summer monsoon (June–September, during which enhancements in a number of atmospheric species were observed in monsoon outflow. In addition to in situ measurements of trace gases and aerosols, whole air samples were collected during the flights, and these were subsequently analyzed for a suite of trace gases that included the non-methane hydrocarbons. Non-methane hydrocarbons are relatively short-lived compounds and the large enhancements in their mixing ratios in the upper troposphere over Southwest Asia between June and September, sometimes more than double their spring and fall means, provides qualitative evidence for the influence of convectively uplifted boundary layer air. The particularly large enhancements of the combustion tracers benzene and ethyne, along with the similarity of their ratios to carbon monoxide and emission ratios from the burning of household biofuels, indicate a strong influence of biofuel burning to NMHC emissions in this region. Conversely, the ratios of ethane and propane to carbon monoxide, along with the ratio between i-butane and n-butane, indicate a significant source of these compounds from the use of LPG and natural gas, and comparison to previous campaigns suggests that this source could be increasing. Photochemical aging patterns of NMHCs showed that the CARIBIC samples were collected in two distinctly different regions of the monsoon circulation: a southern region where air masses had been recently influenced by low level contact and a northern region, where air parcels had spent substantial time in transit in the upper troposphere before being probed. Estimates of age using ratios of individual NMHCs have ranges of 3–6 d in the south and 9–12 d in the north.

  8. Adaptación del arroz riego (Oryza sativa L. en el Caribe

    Directory of Open Access Journals (Sweden)

    Aramendiz Tatis Hermes

    2011-03-01

    Full Text Available

    En Colombia, el  arroz ocupa el primer lugar en seguridad alimentaria, valor económico y generación de empleo entre los cultivos anuales, siendo el sistema bajo riego mãs importante. El objetivo fue determinar el progreso, estabilidad y adaptabilidad del rendimiento de arroz bajo riego, en cinco departamentos del caribe colombiano. Se utilizaron datos del Ministerio de Agricultura y Desarrollo Rural, correspondiente a los Departamentos de Córdoba, Bolívar, Magdalena,  Cesar y Guajira,  durante el periodo 1987-2008.  La estimación  del progreso del rendimiento se realizó a través del análisis de regresión lineal entre los años (variable explicativa y el rendimiento de grano (variable explicada. La estabilidad se determinó a través del coeficiente de variación para tres periodos consecutivos de cinco años y el último de siete. La adaptabilidad, se realizó con el coeficiente de regresión lineal (bi. Los resultados destacan que  el  progreso  en  el  rendimiento  de  grano  en  el  Caribe  colombiano,  osciló  entre  1.15%  y

    3.36% por año y 52.2 y 168.1 kg.ha-1, especialmente en el Departamento de Bolivar (3.36% por año y 168.1 kg.ha-1. La estabilidad, resultó en general alta (CV<15.56% y se incrementó con los años. Los cinco departamentos, presentaron adaptabilidad general (bi>4.57 para el rendimiento de grano.

  9. Adaptación del arroz riego (Oryza sativa L. en el Caribe colombiano

    Directory of Open Access Journals (Sweden)

    Hermes Aramendiz Tatis

    2011-01-01

    Full Text Available En Colombia, el arroz ocupa el primer lugar en seguridad alimentaria, valor económico y generación de empleo entre los cultivos anuales, siendo el sistema bajo riego más importante. El objetivo fue determinar el progreso, estabilidad y adaptabilidad del rendimiento de arroz bajo riego, en cinco departamentos del caribe colombiano. Se utilizaron datos del Ministerio de Agricultura y Desarrollo Rural, correspondiente a los Departamentos de Córdoba, Bolívar, Magdalena, Cesar y Guajira, durante el periodo 1987-2008. La estimación del progreso del rendimiento se realizó a través del análisis de regresión lineal entre los años (variable explicativa y el rendimiento de grano (variable explicada. La estabilidad se determinó a través del coeficiente de variación para tres períodos consecutivos de cinco años y el último de siete. La adaptabilidad, se realizó con el coeficiente de regresión lineal (bi. Los resultados destacan que el progreso en el rendimiento de grano en el Caribe colombiano, osciló entre 1.15% y 3.36% por año y 52.2 y 168.1 kg.ha-1, especialmente en el Departamento de Bolívar (3.36% por año y 168.1 kg.ha-1. La estabilidad, resultó en general alta (CV4.57 para el rendimiento de grano.

  10. Airborne multi-axis DOAS measurements of atmospheric trace gases on CARIBIC long-distance flights

    Directory of Open Access Journals (Sweden)

    B. Dix

    2009-11-01

    Full Text Available A DOAS (Differential Optical Absorption Spectroscopy instrument was implemented and operated onboard a long-distance passenger aircraft within the framework of the CARIBIC project (Civil Aircraft for the Regular Investigation of the atmosphere Based on an Instrument Container. The instrument was designed to keep weight, size and power consumption low and to comply with civil aviation regulations. It records spectra of scattered light from three viewing directions (nadir, 10° above and below horizon using a miniaturized telescope system. The telescopes are integrated in the main pylon of the inlet system which is mounted at the belly of the aircraft. Fibre bundles transmit light from the telescopes to spectrograph-detector units inside the DOAS container instrument. The latter is part of the removable CARIBIC instrument container, which is installed monthly on the aircraft for a series of measurement flights.

    During 30 flight operations within three years, measurements of HCHO, HONO, NO2, BrO, O3 and the oxygen dimer O4 were conducted. All of these trace gases except BrO could be analysed with a 30 s time resolution. HONO was detected for the first time in a deep convective cloud over central Asia, while BrO, NO2 and O3 could be observed in tropopause fold regions. Biomass burning signatures over South America could be seen and measurements during ascent and descent provided information on boundary layer trace gas profiles (e.g. NO2 or HCHO.

  11. Airborne multi-axis DOAS measurements of atmospheric trace gases on CARIBIC long-distance flights

    Directory of Open Access Journals (Sweden)

    B. Dix

    2009-02-01

    Full Text Available A DOAS (Differential Optical Absorption Spectroscopy instrument was implemented and operated onboard a long-distance passenger aircraft within the framework of the CARIBIC project (Civil Aircraft for the Regular Investigation of the atmosphere Based on an Instrument Container. The instrument was designed to keep weight, size and power consumption low and to comply with civil aviation regulations. It records spectra of scattered light from three viewing directions (nadir, 10° above and below horizon using a miniaturized telescope system. The telescopes are integrated in the main pylon of the inlet system which is mounted at the belly of the aircraft. Fibre bundles transmit light from the telescopes to spectrograph-detector units inside the DOAS container instrument. The latter is part of the removable CARIBIC instrument container, which is installed monthly on the aircraft for a series of measurement flights.

    During 30 flight operations within three years, measurements of HCHO, HONO, NO2, BrO, O3 and the oxygen dimer O4 were conducted. All of these trace gases except BrO could be analysed with a 30 s time resolution. HONO was detected for the first time in a deep convective cloud over central Asia. BrO, NO2 and O3 could be observed in tropopause fold regions, biomass burning signatures over South America could be seen and measurements during ascent and descent provided information on boundary layer trace gas profiles (e.g. NO2 or HCHO.

  12. Variations in electrical impedance and phase angle among seedlings of Pinus densata and parental species in Pinus tabuliformis habitat environment

    Institute of Scientific and Technical Information of China (English)

    Xinyu Chen; Huwei Yuan; Xiange Hu; Jingxiang Meng; Xianqing Zhou; Xiao-Ru Wang; Yue Li

    2015-01-01

    Electrical impedance (EI) and phase angle (PHI) parameters in AC impedance spectroscopy are important electrical parameters in the study of medical pathology. However, little is known about their application in variation and genetic relationship studies of forest trees. In order to test whether impedance parameters could be used in genetic relationship analysis among conifer species, EI and PHI were measured in a seedling experiment test composed of Pinus tabuliformis, Pinus yunnanensis, and Pinus densata in a habitat of Pinus tabuliformis. The results showed that variations in both EI and PHI among species were sig-nificant in different electric frequencies, and the EI and PHI values measured in the two populations of P. densata were between the two parental species, P. yunnanensis and P. tabuliformis. These results show that these two impedance parameters could reflect the genetic relationship among pine species. This was the first time using the two AC impedance spectroscopy parameters to test the genetic relationship analysis between tree species, and would be a hopeful novel reference methodology for future studies in evolution and genetic variation of tree species.

  13. Protetores físicos para semeadura direta de Pinus elliottii Engelm Shelters for direct seeding of Pinus elliottii Engelm

    Directory of Open Access Journals (Sweden)

    Vilmar Luciano Matteiq

    2001-10-01

    Full Text Available A utilização de protetores físicos tem se revelado uma eficiente técnica para o sucesso da semeadura direta de pinus. O presente trabalho avaliou diferentes tipos e tamanhos de protetores físicos de pontos de semeadura para a implantação de povoamentos de Pinus elliottii por semeadura direta. Como protetores, foram utilizados copos plástico, copos de papel e laminado de madeira. Esses protetores foram colocados sobre os pontos semeados com três sementes cada. Foi avaliada a emergência, sobrevivência, perdas por pássaros, perdas por tombamento e número de pontos com, pelo menos, uma planta viva, seis meses após a semeadura. Os protetores utilizados influenciaram positivamente, nos resultados, para todas as variáveis analisadas, por evitar perdas de sementes causadas por arraste ou soterramento e, principalmente por diminuíram os danos causados por pássaros que juntamente com as formigas, foram os principais problemas encontrados na implantação do povoamento de pinus por semeadura direta.The use of individual shelters has become an efficient method for direct seeding of pine. This work investigated the use of different kinds and sizes of shelters placed at sowing sites to establish new populations of directly seeded Pinus elliottii. Plastic and paper cups with open bottoms, or wood slats were used as protective shields. These were placed at sowing sites, each one containing 3 seeds. Emergencies, survival, losses due to birds or lodging, and number of sites with at least one live plant were analyzed six months after sowing. Shelters had positive effects on all variables analyzed both for avoiding losses resulted from dragging or burying of seeds, and for diminidhing the harm caused by birds which along with ants were the main problems found during the establishment of directly seeded pinus population.

  14. ¿En busca de una Pax Americana? La Cuenca del Caribe como el Mare Nostrum estadounidense.

    Directory of Open Access Journals (Sweden)

    Coronado Holman

    2012-01-01

    Full Text Available La periodización de la política exterior norteamericana frente a los Estados que componen la Cuenca del Caribe, permite formar una imagen de las conductas e identidades que se han tenido y aún se tienen con respecto a la inserción, participación e inclusión de Estados Unidos en el policy-making interno de la Cuenca del Caribe. Esta forma de hacer política de Estados Unidos ha sido cambiante y altamente influenciada por la idea de la estabilidad y control hemisférico que siempre ha pretendido, la cual puede llegar a ser comparada con el período de expansión del Imperio romano, cuyo punto de partida para el devenir de un gran Imperio fue el mar.

  15. Civil Aircraft for the regular investigation of the atmosphere based on an instrumented container: The new CARIBIC system

    Directory of Open Access Journals (Sweden)

    C. A. M. Brenninkmeijer

    2007-09-01

    Full Text Available An airfreight container with automated instruments for measurement of atmospheric gases and trace compounds was operated on a monthly basis onboard a Boeing 767-300 ER of LTU International Airways during long-distance flights from 1997 to 2002 (CARIBIC, Civil Aircraft for Regular Investigation of the Atmosphere Based on an Instrument Container, caribic-atmospheric.com">http://www.caribic-atmospheric.com. Subsequently a more advanced system has been developed, using a larger capacity container with additional equipment and an improved inlet system. CARIBIC phase #2 was implemented on a new long-range aircraft type Airbus A340-600 of the Lufthansa German Airlines (Star Alliance in December 2004, creating a powerful flying observatory. The instrument package comprises detectors for the measurement of O3, total and gaseous H2O, NO and NOy, CO, CO2, O2, Hg, and number concentrations of sub-micrometer particles (>4 nm, >12 nm, and >18 nm diameter. Furthermore, an optical particle counter (OPC and a proton transfer mass spectrometer (PTR-MS are incorporated. Aerosol samples are collected for analysis of elemental composition and particle morphology after flight. Air samples are taken in glass containers for laboratory analyses of hydrocarbons, halocarbons and greenhouse gases (including isotopic composition of CO2 in several laboratories. Absorption tubes collect oxygenated volatile organic compounds. Three differential optical absorption spectrometers (DOAS with their telescopes mounted in the inlet system measure atmospheric trace gases such as BrO, HONO, and NO2. A video camera mounted in the inlet provides information about clouds along the flight track. The flying observatory, its equipment and examples of measurement results are reported.

  16. DOAS spectroscopy onboard the CARIBIC passenger aircraft – trace gas concentration, and flux measurement of localized sources

    OpenAIRE

    Walter, David Josef

    2013-01-01

    This thesis deals with the remote sensing and the flux calculation of atmospheric trace gases, using Differential Optical Absorption Spectroscopy (DOAS). Since 2010, within the CARIBIC project (Civil Aircraft for the Regular Investigation of the atmosphere Based on an Instrument Container), a new DOAS instrument is installed in the cargo compartment of a passenger aircraft once per month as part of a fully automated measurement container. With this instrument, nitrogen dioxide (NO2), sulfphur...

  17. Seguridad Vial - BID: Una estrategia para la región de América Latina y el Caribe

    OpenAIRE

    Néstor Roa

    2012-01-01

    Presentación del Jefe de la División de Transporte del Banco, Nestor Roa, durante el principal evento regional de Seguridad Vial de América Latina y el Caribe, CISEV III que se realizó en Bogotá DC entre el 12 y el 14 de junio de 2012. El documento muestra el trabajo de la estrategia de Seguridad Vial del BID.

  18. Civil aircraft for the regular investigation of the atmosphere based on an instrumented container: the new CARIBIC system

    Directory of Open Access Journals (Sweden)

    C. A. M. Brenninkmeijer

    2007-04-01

    Full Text Available A large airfreight container with automated instruments for measurement of atmospheric gases and trace compounds was operated on a monthly basis onboard a Boeing 767-300 ER of LTU International Airways during long-distance flights from 1997 to 2002 (CARIBIC, Civil Aircraft for Regular Investigation of the Atmosphere Based on an Instrument Container, caribic-atmospheric.com">http://www.caribic-atmospheric.com. Subsequently a more advanced system has been developed, using a larger capacity container with additional equipment and an improved inlet system. CARIBIC phase #2 was implemented on a new long-range aircraft type Airbus A340-600 of the Lufthansa German Airlines (Star Alliance in December 2004, creating a powerful flying observatory. The instrument package comprises detectors for the measurement of O3, total and gaseous H2O, NO and NOy, CO, CO2, O2, Hg, and number concentrations of sub-micrometer particles (>4 nm, >12 nm, and >18 nm diameter. Furthermore, an optical particle counter and a proton transfer mass spectrometer (PTR-MS are installed. Aerosol samples are collected for analyses of elemental composition and particle morphology after flight. Air samples are taken in glass containers for laboratory analyses of hydrocarbons, halocarbons and greenhouse gases in several laboratories. Absorption tubes collect oxygenated volatile organic compounds. Three differential optical absorption spectrometers (DOAS with their telescopes mounted in the inlet system measure atmospheric trace gases such as BrO, HONO, and NO2. A video camera mounted in the inlet provides information about clouds along the flight track. Here we describe the flying observatory and report examples of measurement results.

  19. PLYWOOD MANUFACTURE FROM FIVE SPECIES OF TROPICAL PINE

    OpenAIRE

    Setsuo Iwakiri; Danielle Previdi Olandoski; Gabriela Leonhardt; Martha Andreia Brand

    2010-01-01

    This research was developed aiming at evaluating the feasibility of the use of 5 species of tropical pine to plywood manufacture. The following species were studied: Pinus caribaea, Pinus chiapensis, Pinus maximinoi, Pinus oocarpa, Pinus tecunumannii and Pinus taeda, being the last used as the referential species. Plywood were manufactured with 5 plies, bonded with urea-formaldheyde and fenol-formaldheyde resin. The results of thickness sweeling and recovering were the same for all species st...

  20. Needle morphological evidence of the homoploid hybrid origin of Pinus densata based on analysis of artificial hybrids and the putative parents, Pinus tabuliformis and Pinus yunnanensis.

    Science.gov (United States)

    Xing, Fangqian; Mao, Jian-Feng; Meng, Jingxiang; Dai, Jianfeng; Zhao, Wei; Liu, Hao; Xing, Zhen; Zhang, Hua; Wang, Xiao-Ru; Li, Yue

    2014-05-01

    Genetic analyses indicate that Pinus densata is a natural homoploid hybrid originating from Pinus tabuliformis and Pinus yunnanensis. Needle morphological and anatomical features show relative species stability and can be used to identify coniferous species. Comparative analyses of these needle characteristics and phenotypic differences between the artificial hybrids, P. densata, and parental species can be used to determine the genetic and phenotypic evolutionary consequences of natural hybridization. Twelve artificial hybrid families, the two parental species, and P. densata were seeded in a high-altitude habitat in Linzhi, Tibet. The needles of artificial hybrids and the three pine species were collected, and 24 needle morphological and anatomical traits were analyzed. Based on these results, variations in 10 needle traits among artificial hybrid families and 22 traits among species and artificial hybrids were predicted and found to be under moderate genetic control. Nineteen needle traits in artificial hybrids were similar to those in P. densata and between the two parental species, P. tabuliformis and P. yunnanensis. The ratio of plants with three needle clusters in artificial hybrids was 22.92%, which was very similar to P. densata. The eight needle traits (needle length, the mean number of stomata in sections 2 mm in length of the convex and flat sides of the needle, mean stomatal density, mesophyll/vascular bundle area ratio, mesophyll/resin canal area ratio, mesophyll/(resin canals and vascular bundles) area ratio, vascular bundle/resin canal area ratio) relative to physiological adaptability were similar to the artificial hybrids and P. densata. The similar needle features between the artificial hybrids and P. densata could be used to verify the homoploid hybrid origin of P. densata and helps to better understand of the hybridization roles in adaptation and speciation in plants. PMID:24963383

  1. Monitoring of chromosomal aberrations in natural populations of Pinus pallasiana

    OpenAIRE

    V. P. Koba

    2012-01-01

    This paper presents the results of monitoring research of the chromosome aberrations at the stage of anaphase-telophase. The statistical characteristics of dynamics of chromosomal aberrations in populations of Pinus pallasiana D. Don across the high-altitude zones of the Mountain Crimea is given. It is established that on the southern macroslope of the Crimean Main Ridge the frequency of chromosomal aberrations in the P. pallasiana stands is higher in the lower zone in comparison with the mid...

  2. Urbanization in China drives soil acidification of Pinus massoniana forests

    OpenAIRE

    Juan Huang; , Wei Zhang; Jiangming Mo; Shizhong Wang; Juxiu Liu; Hao Chen

    2015-01-01

    Soil acidification instead of alkalization has become a new environmental issue caused by urbanization. However, it remains unclear the characters and main contributors of this acidification. We investigated the effects of an urbanization gradient on soil acidity of Pinus massoniana forests in Pearl River Delta, South China. The soil pH of pine forests at 20-cm depth had significantly positive linear correlations with the distance from the urban core of Guangzhou. Soil pH reduced by 0.44 unit...

  3. Pharmaceutical and nutraceutical effects of Pinus pinaster bark extract

    OpenAIRE

    Iravani, S.; Zolfaghari, B.

    2011-01-01

    In everyday life, our body generates free radicals and other reactive oxygen species which are derived either from the endogenous metabolic processes (within the body) or from external sources. Many clinical and pharmacological studies suggest that natural antioxidants can prevent oxidative damage. Among the natural antioxidant products, Pycnogenol® (French Pinus pinaster bark extract) has been received considerable attention because of its strong free radical-scavenging activity against reac...

  4. Predictive modelling of climate suitability for Pinus halepensis in Spain

    OpenAIRE

    Gastón González, Aitor; Garcia Viñas, Juan Ignacio

    2010-01-01

    The response of Mediterranean pine species distribution to global change is a key feature of forest management in a changing environment. Climate suitability models are valuable tools for understanding and anticipating the effects of climate change on species distributions. Logistic regression was used to model climate suitability for Pinus halepensis in Spain, using National Forest Inventory as training sample. Predictive performance was evaluated using ICP Forests Level I grid as independen...

  5. Induction of somatic embryogenesis in Pinus heldreichii culture

    OpenAIRE

    Stojičić Dragana; Uzelac Branka; Janošević Dušica; Ćulafić Ljubinka; Budimir Snežana

    2007-01-01

    The potential for somatic embryogenesis in zygotic embryo and megagametophyte cultures of Pinus heldreichii was examined. Somatic embryogenesis was initiated from megagametophytes containing immature zygotic embryos at early stages of development. An induction frequency of up to 6.7% was obtained on Gresshoff and Doy medium in the presence of 2 mg/l 2,4-dichlorophenoxyacetic acid (2,4-D) and 0.5 mg/l benzyladenine (BA). Formation and further proliferation of embryogenic tissue were achieved u...

  6. Characterization of Phenolic Compounds in Pinus laricio Needles and Their Responses to Prescribed Burnings

    OpenAIRE

    Lila Ferrat; Catherine Fernandez; Stéphane Greff; Vanina Pasqualini; Magali Cannac Cannac

    2007-01-01

    Fire is a dominant ecological factor in Mediterranean-type ecosystems. Management strategies include prescribed (controlled) burning, which has been used in the management of several species, such as Pinus nigra ssp laricio var. Corsicana, a pine endemic to Corsica of great ecological and economic importance. The effects of prescribed burning on Pinus laricio have been little studied. The first aim of this study was to characterize total and simple phenolic compounds in Pinus laricio. The sec...

  7. PiroPinus: a spreadsheet application to guide prescribed burning operations in maritime pine forest

    OpenAIRE

    Fernandes, Paulo; Loureiro, Carlos; Botelho, Hermínio

    2011-01-01

    The efficient, sustainable and safe use of prescribed burning is based on quantitative application guidelines. PiroPinus was conceived for operational support to line-ignited, hazard-reduction burning in maritime pine (Pinus pinaster) forest, but can be used as a modelling tool for surface fire behaviour in general. PiroPinus rests on a sound empirical foundation and links the fire environment (fuel, weather, terrain), fire behaviour characteristics, and fire effects on fuels and trees. PiroP...

  8. Glacial Refugium of Pinus pumila (Pall.) Regel in Northeastern Siberia

    Energy Technology Data Exchange (ETDEWEB)

    Shilo, N A; Lozhkin, A V; Anderson, P M; Brown, T A; Pakhomov, A Y; Solomatkina, T B

    2007-02-10

    One of the most glowing representatives of the Kolyma flora [1], ''Pinus pumila'' (Pall.) Regel (Japanese stone pine), is a typical shrub in larch forests of the northern Okhotsk region, basins of the Kolyma and Indigirka rivers, and high-shrub tundra of the Chukchi Peninsula. It also forms a pine belt in mountains above the forest boundary, which gives way to the grass-underbrush mountain tundra and bald mountains. In the southern Chukchi Peninsula, ''Pinus pumila'' along with ''Duschekia fruticosa'' (Rupr.) Pouzar and ''Betula middendorffii'' Trautv. et C. A. Mey form trailing forests transitional between tundra and taiga [2]. Pinus pumila pollen, usually predominating in subfossil spore-and-pollen spectra of northeastern Siberia, is found as single grains or a subordinate component (up 2-3%, rarely 10%) in spectra of lacustrine deposits formed during the last glacial stage (isotope stage 2) in the Preboreal and Boreal times of the Holocene. Sometimes, its content increases to 15-22% in spectra of lacustrine deposits synchronous to the last glacial stage near the northern coast of the Sea of Okhotsk [3], evidently indicating the proximity of Japanese stone pine thickets.

  9. Photosynthesis and respiration in the needles of Pinus sibirica and Pinus pumila and their putative hybrids

    Directory of Open Access Journals (Sweden)

    A.P. Zotikova

    2013-12-01

    Full Text Available A putative interspecific hybridization in Pinaceae family was investigated. Very rarely the physiological methods were involved in hybridization processes that occurs in the hybrid zones. It is well known that in most gymnosperms, the plastid genome is inherited from the paternal component while the mitochondrion is inherited from the maternal one. Therefore functioning pattern of organelles in the hybrid plant can suggest parent, from which they were inherited. The aim of this study was to indirectly establish the inheritance energy-transducing organelles (mitochondria, chloroplast according to their functioning. Current year needles from Siberian Stone Pine (Pinus sibirica Du Tour and Japanese Stone Pine (Pinus pumila (Pall. Regel as parent species and their putative hybrids were collected from Baikal Region. The photosynthesis rate was determined by using the spectrophotometer. The study of emission CO2 under dark respiration of needle was conducted with laser optical-acoustic gasanalyzer. The quantity was measured at 1, 2 and 3 hour after experiment start. The rate of the photoreduction ferricyanide potassium was characterized by the primary photochemical processes activity at the level of photosystem II. Comparison of pure species was shown that Japanese Stone Pine had higher functional activity of chloroplast as compared with SiberianStone Pine in spite of the fact that they are growing in similar environment conditions. Two of three analyzed hybrids had decreasedactivity of their chloroplasts. Unfortunately, in this case we can't conclude if the chloroplasts were inherited from Siberian Stone Pine orfrom Japanese Stone Pine. Chloroplast activity of the third hybrid was approximately similar to that of Japanese Stone Pine suggesting thatits chloroplasts were inherited from this parent. Consequently, the Siberian Stone Pine and the Japanese Stone Pine were maternal and paternal, respectively parents of

  10. Amenazas naturales asociadas al ascenso del nivel del mar en Caribe Colombiano

    Directory of Open Access Journals (Sweden)

    Robertson Kim Gregory

    2003-01-01

    Full Text Available Se presentan los resultados de recientes investigaciones sobre el impacto del ascenso del nivel del mar en la Costa Caribe colombiana, bases para el primer informe de Colombia a la Convención Internacional de Cambio Climático, adelantado en convenio con elIDE..-.1f. Con base en el estudio de las geoformas litorales, los procesos dinámicos asociadosy su evolución reciente, se evaluó la amenaza por inundación y erosión asociada al actual ascenso del nivel del mar, proyectado por IP(C (panel Intergubemamcntal de Expertos de Cambio Climático en un metro pata el año 2100. A partir de la interpretación de imágenes de satélite y fotografias aéreas, apoyada en información secundaria y verificación de campo, se identificaron 15 unidades geomorfológicas básicas de origen estructural, fluvial y marino. Con base las características geomorfológicas y criterios de resiliencia frente a la acción del oleaje y la inundación litoral, se generó un modelo morfodinámico que pronostica el impacto del ascenso del nivel marino para el litoral Caribe colombiano. De acuerdo con este análisis, se estima que las unidades geomorfológicas recientes desarrolladas durante los últimos 2.500 años podrían ser reactivadas por el actual ascenso del nivel del mar, afectando numerosos centros urbanos tales como Cartagena, Santa Marta, Puerto Colombia y Turbo y actividades económicas de-importancia como el comercio portuario y el turismo. Para los 1.819 Km. de línea de costa del Caribe Colombiano, se estima que el 33.7% presenta alta susceptibilidad a la erosión marina, representado por geoformas que presentan grari fragilidad ante los procesos erosivos. En la linea de costa restante, 31,2% presenta susceptibilidad mec!ia y 35.1% susceptibilidad baja y muy baja, en una linea de costa caracterizada por geoformas con fragilidad y mecanismos de resiliencia variables. Por inundación, se pronostica que 1192 Km2 de costa baja serán anegados, 2331 Km2 sufrir

  11. Ectomycorrhizal diversity associated with Cedrus deodara and Pinus wallichiana in the Kashmir Himalaya, India.

    Science.gov (United States)

    Itoo, Zahoor Ahmad; Reshi, Zafar A

    2014-01-01

    The present study was undertaken to document the ectomycorrhizal diversity associated with the Cedrus deodara and Pinus wallichiana in the Kashmir Himalaya, India. The extensive field surveys carried out in the Kashmir Himalaya at five study sites resulted in the collection and identification of 76 potential ectomycorrhizal fungal species associated with the Cedrus deodara and Pinus wallichiana. Maximum 32 number of species were found associated with Pinus wallichiana, 19 with Cedrus deodara and 25 species were found growing in association with both the conifers. The present study reveals that Cedrus deodara and Pinus wallichiana in the Kashmir Himalaya, India harbour diverse ectomycorrhizal fungal species. PMID:24783775

  12. Islas de ida y vuelta. Canarias y El Caribe en contexto colonial

    Directory of Open Access Journals (Sweden)

    Ortiz García, Carmen

    2004-12-01

    Full Text Available On the presupposition that the conquest of the Canary Islands set the colonial stage for the later Spanish enterprises in the Americas, the author discusses a number of elements of identity shared by the islands of both the eastern Atlantic and the Caribbean. Sugar, the slave trade and the raising of bananas, cochineal and tobacco are the instances chosen for this comparative analysis. In addition, the author makes a reference to the legends of the apparition of the Virgin of Charity at El Cobre, in Cuba, and of Candlemas in Tenerife.

    Partiendo de la idea de que la conquista de las Islas Canarias fue el primer ensayo colonial de lo que luego desarrollarían los españoles en América, se examinan algunos elementos de identidad entre el mundo isleño atlántico y caribeño, producidos precisamente por esa situación inicial de dominio colonial. El azúcar, la trata de esclavos, los cultivos de plátano, grana y tabaco son los ejemplos escogidos para este análisis comparado. Finalmente se hace una referencia comparativa de las leyendas de la aparición de la Virgen de la Caridad del Cobre en Cuba y de la Virgen de Candelaria en Tenerife

  13. Comportamiento del mercado turístico extranjero en el Caribe Mexicano

    Directory of Open Access Journals (Sweden)

    Dr. Francisco J. Güemes-Ricalde

    2009-11-01

    Full Text Available El Caribe mexicano atrae visitantes de regiones distintas en diferentes épocas del año. A los prestadores de servicios turísticos les resulta difícil conocer y separar las preferencias de actividades que realizan los visitantes de cada país. Arriban visitantes mexicanos y extranjeros, las preferencias de estos últimos en relación a la demanda de servicios son diferentes. Contrario a lo que se conocía, el estudio de mercado determinó que la demanda mexicana representa un mercado importante en marcadas épocas del año. Se calcula que cada año alrededor de dos millones de turistas nacionales arriban a la Riviera y Costa Maya en la región norte de Quintana Roo. Conocer las preferencias de consumo de los diferentes segmentos de turistas y la forma en que evalúan la posibilidad de demandar los servicios turísticos da la pauta para ofrecérselos en forma diferenciada y adecuada a cada segmento y en relación a cada una de las diversas actividades turísticas que realizan, entre ellas el ecoturismo de la cual poco se conoce en esta región del país.

  14. Intereses y rivalidades regionales en la Venezuela Caribeña

    Directory of Open Access Journals (Sweden)

    Arlene Urdaneta Quintero

    2006-01-01

    Full Text Available Durante su primer gobierno (1870–1877, el Presidente Antonio Guzmán Blanco desarrolló un programa que aspiraba a centralizar política y económicamente a Venezuela. Una de las disposiciones aprobadas fue el cierre de los puertos de Maracaibo y La Vela, para las operaciones de importación y exportación realizadas desde los Andes venezolanos y colombianos, a través del Caribe. Estas funciones fueron transferidas al distante Puerto Cabello. Gran parte del occidente del país fue afectado por esta medida que no consideraba la larga tradición histórica de centros económicos que por centurias habían liderado las actividades agroexportadoras de sus respectivos ámbitos comerciales. La medida no sólo perjudicó los intereses de la región histórica del Lago y de Coro, favoreció a grupos económicos rivales establecidos en la región norcentral, asociados con el presidente de la república. En el caso particular del Zulia, el cierre del puerto de Maracaibo afectó a financistas, pequeños y grandes comerciantes, transportistas, navegantes, marineros, productores y diferentes colectivos del estado; otros sectores perjudicados fueron los comerciantes vinculados con esta actividad en Colombia y Curazao

  15. Efeito do comprimento do corpo-de-prova na velocidade ultra-sônica em madeiras

    OpenAIRE

    Oliveira Fabiana Goia Rosa de; Miller Karla Peitl; Candian Marcela; Sales Almir

    2006-01-01

    O presente artigo apresenta um estudo sobre a variação da velocidade ultra-sônica longitudinal em função do comprimento da peça de madeira. As espécies utilizadas foram: pinus caribaea (Pinus caribaea var. caribaea) eucalipto citriodora (Eucalyptus citriodora), eucalipto grandis (Eucalyptus grandis) e jatobá (Hymenaea sp). Utilizou-se equipamento de ultra-som com transdutores exponenciais de 22 kHz. Foram feitas medições do tempo de propagação das ondas ultra-sônicas, com o comprimento varian...

  16. Efeito do comprimento do corpo-de-prova na velocidade ultra-sônica em madeiras Effect of the size of the specimen on ultrasonic velocity

    OpenAIRE

    Fabiana Goia Rosa de Oliveira; Karla Peitl Miller; Marcela Candian; Almir Sales

    2006-01-01

    O presente artigo apresenta um estudo sobre a variação da velocidade ultra-sônica longitudinal em função do comprimento da peça de madeira. As espécies utilizadas foram: pinus caribaea (Pinus caribaea var. caribaea) eucalipto citriodora (Eucalyptus citriodora), eucalipto grandis (Eucalyptus grandis) e jatobá (Hymenaea sp). Utilizou-se equipamento de ultra-som com transdutores exponenciais de 22 kHz. Foram feitas medições do tempo de propagação das ondas ultra-sônicas, com o comprimento varian...

  17. The influence of edaphotope on radionuclide accumulation by Pinus silvestrus L

    International Nuclear Information System (INIS)

    The influence of soil characteristics upon accumulation of radionuclides by Pinus silvestrus has been studied. It was established, that radionuclide accumulation by Pinus silvestrus pant increased with rise of soil moisture. Seasonal dynamics of radionuclide accumulation by plants was demonstrated (authors)

  18. El Canon oculto. La literatura de América Latina y el Caribe en la transposición al ecosistema digital

    OpenAIRE

    Vila, Adrián Rubén

    2015-01-01

    [ES] Esta Tesis tiene como objeto de estudio la acción de la industria editorial en digital en el marco de la transposición a formato digital de los títulos de los autores que componen un corpus de literatura latinoamericana y caribeña (CLLyC) diseñado para esta investigación. Este CLLyC comprende tanto al segmento latinoamericano y caribeño de El canon occidental de Harold Bloom como aquellos autores y obras que son aportados por otras corrientes y teorías distantes/en tensión con el mainstr...

  19. La práctica de la medicina tradicional en América Latina y el Caribe: el dilema entre regulación y tolerancia

    OpenAIRE

    Nigenda Gustavo; Mora-Flores Gerardo; Aldama-López Salvador; Orozco-Núñez Emanuel

    2001-01-01

    OBJETIVO: Caracterizar el estado actual de la regulación de la medicina tradicional en nueve países de América Latina y el Caribe. MATERIAL Y MÉTODOS: Se construyó una base de datos sobre componentes de los sistemas de salud tradicionales en nueve países de América Latina y el Caribe, mediante la creación de una red de individuos e instituciones de distintos países que estuvieran interesados en participar como informantes especializados con diferentes perfiles. La información para este estudi...

  20. Redes de distribución de caribú en Sheshatshiu, Labrador: una estrategia de modelización

    Directory of Open Access Journals (Sweden)

    Damian Castro

    2009-07-01

    Full Text Available La localidad de Sheshatshiu, en la península de Québec/Labrador, es uno de los asentamientos del pueblo Innu impulsados por el gobierno canadiense en los 1950s y 1960s. A pesar de la crisis alimentaria que la sedentarización forzada produjo, el caribú sigue constituyendo una parte importante de la dieta y la cultura Innu. El objetivo de este trabajo es mostrar una estrategia de modelización de la distribución de caribú en Sheshatshiu. La metodología seleccionada incluye tres pasos. El primer paso de modelización es el diseño de una base de datos con la información de distribución obtenida a partir de una encuesta en la que se relevaron 30 casas aleatoriamente y un subsiguiente muestreo "bola de nieve". Luego, se usa el programa UCINET para determinar clusterización, conectividad y centralidad. El tercer y último paso es determinar el alcance la distribución de caribú a partir del análisis de los procedimientos previos.The town of Sheshatshiu, located in the Quebec-Labrador peninsula, is one of the settlements created by the Canadian government in the 1950s and 1960s. In spite of the nutritional crisis that the forced sedentarization produced, caribou is still an important part of the Innu diet and culture. The goal of this paper is to show a modeling strategy of the caribou distribution in Sheshatshiu. The selected methodology includes three steps. The first modeling step is the design of a database to store the distribution information obtained from a random survey of 30 households and a subsequent snowball survey. The second step is to determine the clusterization, connectivity and centrality measures, using UCINET software. The third and last step is establishing the scope of caribou distribution using the previous procedures.

  1. Geochemical record of subduction initiation in the sub-arc mantle: Insights from the Loma Caribe peridotite (Dominican Republic)

    Science.gov (United States)

    Marchesi, Claudio; Garrido, Carlos J.; Proenza, Joaquín A.; Hidas, Károly; Varas-Reus, María Isabel; Butjosa, Lidia; Lewis, John F.

    2016-05-01

    The Loma Caribe peridotite body is mainly composed of serpentinized spinel harzburgites and lherzolites and minor orthopyroxene-bearing dunites and dunites. Modal proportions, mineral and whole-rock major and trace element compositions generally coincide with those of abyssal mantle rocks from mid-ocean ridges for the lherzolites, and refractory supra-subduction peridotites for the harzburgites and dunites. The clinopyroxene-bearing harzburgites have intermediate compositions that overlap with those of residual mantle from both these settings. Major elements in the peridotites were mostly undisturbed by serpentinization and/or seafloor weathering whereas light rare earth elements (LREE) and large ion lithophile elements (LILE) were enriched by syn- and/or post-melting interaction with fluids/melts. Major element variations indicate that protoliths of the Loma Caribe peridotites mostly melted at 1-2 GPa and 1250 °C-1500 °C, as normal mid-ocean ridge and supra-subduction zone mantle. The MREE/HREE fractionations in both whole rocks and clinopyroxene can be explained by initial low (5%-6%) fractional melting of a garnet lherzolite source followed by variable (5%-20%) melting in the spinel stability field. The lherzolites and clinopyroxene-bearing harzburgites are residues of increasing melting triggered by increasing addition of slab fluids to a spinel peridotite source, while melting of the harzburgite protoliths was likely the result of focused flux of slab hydrous melts. The dunites and orthopyroxene-bearing dunites are products of pyroxene dissolution in residual peridotites caused by reaction with two different subduction-related melts, probably the parental magmas of Early Cretaceous low-Ti island arc tholeiites (IAT) and boninites from Central Hispaniola, respectively. We conclude that the geochemical heterogeneity of the Loma Caribe peridotites records shifting conditions of melting during the development of subduction beneath the incipient Greater Antilles

  2. Geochemical record of subduction initiation in the sub-arc mantle: insights from Loma Caribe peridotite (Dominican Republic)

    Science.gov (United States)

    Marchesi, Claudio; Garrido, Carlos J.; Proenza, Joaquín A.; Hidas, Károly; Varas-Reus, María Isabel; Butjosa, Lidia; Lewis, John F.

    2016-04-01

    The Loma Caribe peridotite body is mainly composed of serpentinized spinel harzburgite and lherzolite and minor (Opx-bearing) dunite. Modal proportions, mineral and whole-rock major and trace element compositions generally coincide with those of abyssal mantle rocks from mid-ocean ridges for lherzolite and refractory supra-subduction peridotites for harzburgite and (Opx-) dunite. Cpx-bearing harzburgite has intermediate compositions that overlap those of residual mantle from both these settings. Major elements in peridotite were mostly undisturbed by serpentinization and/or seafloor weathering whereas LREE and LILE were enriched by syn- and/or post-melting interaction with fluids/melts. Major element variations support that protoliths of Loma Caribe peridotite mostly melted at 1-2 GPa and 1300-1500 °C, as normal mid-ocean ridge and supra-subduction zone mantle. MREE/HREE fractionations in whole-rocks and clinopyroxene can be explained by initial low (5-6%) fractional melting of a garnet lherzolite source followed by variable (5-20%) melting in the spinel stability field. Lherzolite and Cpx-harzburgite are residues of increasing melting triggered by increasing addition of fluids to a spinel peridotite source, while melting of the harzburgite protolith was likely promoted by focused flux of hydrous melts. Dunite and Opx-bearing dunite are products of pyroxene dissolution in residual peridotite caused by reaction with two different subduction-related melts, likely the parental magmas of Early Cretaceous low-Ti IAT and boninite from Central Hispaniola, respectively. We propose that the geochemical heterogeneity of Loma Caribe peridotite records shifting conditions of melting during the development of subduction beneath the incipient Greater Antilles paleo-island arc in the Early Cretaceous. The common presence in the Caribbean realm of oceanic mantle rocks related to subduction indicates that most peri-Caribbean ophiolitic bodies are not fragments of an oceanic

  3. Needles of Pinus halepensis as biomonitors of bioaerosol emissions

    OpenAIRE

    Gales, Amandine; Latrille, Eric; Wéry, Nathalie; Steyer, Jean-philippe; Godon, Jean-Jacques

    2014-01-01

    We propose using the surface of pine trees needles to biomonitor the bioaerosol emissions at a composting plant. Measurements were based on 16S rRNA gene copy numbers of Saccharopolyspora rectivirgula, a bioindicator of composting plant emissions. A sampling plan was established based on 29 samples around the emission source. The abundance of 16S rRNA gene copies of S. rectivirgula per gram of Pinus halepensis needles varied from 104 to 102 as a function of the distance. The signal reached th...

  4. Tabla de supervivencia de Pinus Halepensis afectado por incendios forestales

    OpenAIRE

    BORDON PEREZ, PABLO; Pérez-Laorga Arias, Eduardo María; Estruch Fuster, Vicente Domingo; Rodrigo Santamalia, Mª Eugenia

    2012-01-01

    En la Comunidad Valenciana se producen numerosos incendios forestales especialmente en los meses de verano, afectando principalmente a pino carrasco (Pinus halepensis Mill), que es la especie más abundante. Se ha realizado el seguimiento de pinos parcialmente afectados por el fuego en dos incendios que se produjeron en agosto de 2007 y julio de 2009. En estos árboles se midieron: altura del árbol, altura del fuste, diámetro normal, diámetro basal, espesor de corteza, altura del fuste y altura...

  5. Adventitious sprouting of Pinus leiophylla in response to salt stress

    OpenAIRE

    Jimenez-Casas, Marcos; Zwiazek, Janusz J.

    2014-01-01

    & Context Although adventitious shoots are produced in many tree species in response to injury, little is known about the effects of salinity on sprouting. & Aims The main objective was to examine the sprouting capacity of Pinus leiophylla seedlings in relation to injury and physiological changes induced by NaCl. & Methods Seedlings were grown in controlled-environment growth rooms and treated with 0, 100, 150, and 200 mM NaCl. Numbers of adventitious shoots were recorded and growth and physi...

  6. Induction of somatic embryogenesis in Pinus heldreichii culture

    Directory of Open Access Journals (Sweden)

    Stojičić Dragana

    2007-01-01

    Full Text Available The potential for somatic embryogenesis in zygotic embryo and megagametophyte cultures of Pinus heldreichii was examined. Somatic embryogenesis was initiated from megagametophytes containing immature zygotic embryos at early stages of development. An induction frequency of up to 6.7% was obtained on Gresshoff and Doy medium in the presence of 2 mg/l 2,4-dichlorophenoxyacetic acid (2,4-D and 0.5 mg/l benzyladenine (BA. Formation and further proliferation of embryogenic tissue were achieved upon transfer of explants to a medium with reduced levels of growth regulators. Somatic embryos are being cultured for further development. .

  7. Influence of different particle sizes in the bark chemical composition of Eucalyptus globulus Labill., Betula pendula Roth, Picea abies (L.) Karst, Pinus sylvestris L. e Pinus pinea L.

    OpenAIRE

    Mirra, Inês Martins Pereira

    2011-01-01

    Mestrado em Engenharia Florestal e dos Recursos Naturais - Instituto Superior de Agronomia The goal of this report is to characterize the bark of five industrially important forest species in Europe - Eucalyptus globulus, Betula pendula, Picea abies, Pinus sylvestris e Pinus pinea and to define their potential use as a source of value added chemical products. It was performed the anatomical characterization of bark tissues (dissociated elements), the selective fractionation (si...

  8. Tiburones y rayas (subclase elasmobranchi) descartado por la flota de arrastre camaronero en el caribe de colombia

    OpenAIRE

    Acevedo, K.; Bohórquez-Herrera, J.; Moreno, F.; Moreno, C; Molina, E.; Grijalba-Bendeck, M.; Gómez-Canchong, P.

    2011-01-01

    Con el fin de obtener una aproximación a la estructura del ensamblaje de peces cartilaginosos extraídos por la flota de arrastre camaronero en la costa norte de Colombia, se evaluó la composición y abundancia de tiburones y rayas descartados en dos sectores del Caribe colombiano, entre agosto y noviembre de 2004. Mensualmente se analizaron lances de la flota de arrastre camaronero al interior de cada sector (norte: La Virgen y Portete; sur: Barú, cabo Tiburón, Cascajal, Cispatá, Morrosquillo,...

  9. Nutrición en el Caribe colombiano y su relación con el capital humano

    OpenAIRE

    Joaquín Viloria de la Hoz

    2007-01-01

    Este documento analiza la situación nutricional del Caribe colombiano, y la compara con las otras regiones colombianas y la media nacional. Así mismo, estudia las interrelaciones de la desnutrición con variables como la educación, la productividad laboral y la pobreza. El análisis de los diferentes indicadores sobre la desnutrición en Colombia muestra que el problema ha disminuido en las últimas décadas, pero sigue siendo insuficiente. La información para el año 2005 muestra que la desnutrici...

  10. Turismo y desarrollo económico en el Caribe: el auge de las “industrias del pecado”

    OpenAIRE

    Pantojas García, Emilio

    2012-01-01

    En las últimas tres décadas las pequeñas economías del Caribe han sido transformadas de exportadoras de productos primarios, a plataformas de exportación para manufacturas livianas (maquiladoras), a plataformas de servicios internacionales. Durante la primera década del siglo veintiuno los ejes dinámicos de la economía son el turismo y los centros financieros internacionales (offshore). Ligado a estos sectores han surgido un conjunto de actividades denominadas como “industrias del pecado”. Es...

  11. Turismo, arquitectura e identidad urbana: El caso de tres ciudades recientes en la costa del Caribe, México

    OpenAIRE

    Quiroz Rothe, Héctor

    2006-01-01

    A lo largo de los últimos treinta años, la costa del Caribe se ha convertido en una de las regiones turísticas más importantes de México. Entre los efectos sociales y económicos derivados de esta actividad destaca la formación de nuevos centros de población. Es el caso de Cancún y Playa del Carmen; ciudades, cuya traza e imagen urbana son el resultado de procesos de urbanización reciente. Son ciudades de corta memoria histórica, en las cuales predomina la arquitectura moderna internacional, c...

  12. Cobertura de la ciencia de Am??rica Latina y el Caribe en Scopus vs Web of Science

    OpenAIRE

    Santa, Samaly; Herrero-Solana, V??ctor

    2010-01-01

    El prop??sito del presente trabajo es analizar y comparar el grado de cobertura de las revistas, la producci??n cient??fica y la visibilidad que tienen los mayores productores de Am??rica Latina y el Caribe (LAC) en las bases de datos del Institute for Scientific Information (ISI) y Scopus. Los resultados demuestran una amplia cobertura de las revistas nacionales indizadas en SCimago Journal and Country Rank frente a las que incluye journal Citation Report (JCR). Sin embargo, muchas de estas ...

  13. Trapping, chemistry, and export of trace gases in the South Asian summer monsoon observed during CARIBIC flights in 2008

    Science.gov (United States)

    Rauthe-Schöch, Armin; Baker, Angela K.; Schuck, Tanja J.; Brenninkmeijer, Carl A. M.; Zahn, Andreas; Hermann, Markus; Stratmann, Greta; Ziereis, Helmut; van Velthoven, Peter F. J.; Lelieveld, Jos

    2016-03-01

    The CARIBIC (Civil Aircraft for the Regular Investigation of the Atmosphere Based on an Instrument Container) passenger aircraft observatory performed in situ measurements at 10-12 km altitude in the South Asian summer monsoon anticyclone between June and September 2008. These measurements enable us to investigate this atmospheric region (which so far has mostly been observed from satellites) using the broad suite of trace gases and aerosol particles measured by CARIBIC. Elevated levels of a variety of atmospheric pollutants (e.g. carbon monoxide, total reactive nitrogen oxides, aerosol particles, and several volatile organic compounds) were recorded. The measurements provide detailed information about the chemical composition of air in different parts of the monsoon anticyclone, particularly of ozone precursors. While covering a range of 3500 km inside the monsoon anticyclone, CARIBIC observations show remarkable consistency, i.e. with distinct latitudinal patterns of trace gases during the entire monsoon period. Using the CARIBIC trace gas and aerosol particle measurements in combination with the Lagrangian particle dispersion model FLEXPART, we investigated the characteristics of monsoon outflow and the chemical evolution of air masses during transport. The trajectory calculations indicate that these air masses originated mainly from South Asia and mainland Southeast Asia. Estimated photochemical ages of the air were found to agree well with transport times from a source region east of 90-95° E. The photochemical ages of the air in the southern part of the monsoon anticyclone were systematically younger (less than 7 days) and the air masses were mostly in an ozone-forming chemical mode. In its northern part the air masses were older (up to 13 days) and had unclear ozone formation or destruction potential. Based on analysis of forward trajectories, several receptor regions were identified. In addition to predominantly westward transport, we found evidence for

  14. REGÍMENES DE BIENESTAR EN AMÉRICA LATINA Y EL CARIBE: NOTAS PARA PENSAR LO CONTEMPORÁNEO

    OpenAIRE

    Melisa Campana Alabarce

    2015-01-01

    El presente artículo ofrece una caracterización de los regímenes de bienestar latinoamericanos y caribeños en clave historiográfica. Realiza, en primer lugar, un repaso por las condiciones de emergencia de los Estados de Bienestar de Europa occidental y sus características centrales, haciendo especial hincapié en su función como modalidad de gestión regulada de las desigualdades en tanto estrategia de compromiso social del capitalismo industrial. Dialogando con ello, se detiene luego en las e...

  15. III Congreso Latinoamericano y Caribeño de Ciencias Sociales, organizado por la Facultad Latinoamericana de Ciencias Sociales

    OpenAIRE

    Baby-Collin, Virginie; Cortes, Geneviève

    2016-01-01

    El tercer Congreso Latinoamericano y Caribeño de Ciencias Sociales, organizado por la Facultad Latinoamericana de Ciencias Sociales, tuvo lugar los días 26-27 y 28 de agosto de 2015 en la ciudad de Quito. La FLACSO es un organismo internacional creado en 1957, por iniciativa de la Unesco y algunos gobiernos de América Latina. El sistema cuenta con sedes, programas y proyectos académicos de posgrado en ciencias humanas y sociales, en Argentina, Brasil, Chile, Costa Rica, Cuba, Ecuador, El Salv...

  16. Validación de la escala latinoamericana y caribeña de seguridad alimentaria en gestantes adolescentes

    OpenAIRE

    2012-01-01

    Objetivo Realizar validación estadística de  la Escala Latinoamericana y Caribeña de Seguridad Alimentaria (ELCSA), que había sido adaptada lingüísticamente para Colombia en el año 2008 por la Escuela de Nutrición de la Universidad de Antioquia. Métodos Estudio descriptivo. Con un 95 % de nivel de confianza, se aplicó la escala ELCSA a una muestra representativa de 150 hogares de gestantes adolescentes, procedentes de población pobre y vulnerable, consultantes de la ESE Salud Pereira, entre a...

  17. Capacidad solubilizadora de fosfatos de microorganismos rizosféricos asociados a dos manglares del Caribe colombiano

    OpenAIRE

    Galindo Castañeda Tania; Polanía Jaime; Sánchez Nieves Jimena

    2006-01-01

    Se caracterizaron 28 aislamientos de microorganismos solubilizadores de fosfatos (MSF) encontrados en
    rizósferas de Avicennia germinans y Rhizophora mangle en dos manglares del Caribe colombiano, uno ubicado en la
    isla de San Andrés y otro en cercanías al municipio de Barú. De estos aislamientos se eligieron 17, con el fin
    medir su eficiencia fosfatosolubilizadora in vitro. Los aislamientos más eficientes fueron HSF9 (283,1 mg*L-1)
    correspondiente a...

  18. Macroalgas marinas afectadas por flotas de arrastre de camarón en el Mar Caribe de Colombia

    OpenAIRE

    Duarte Luis O.; Gómez-Canchong Paúl; Flórez-Leiva Lennin; Manjarrés Luis María; Díaz-Pulido1 Guillermo

    2005-01-01

    La captura acompañante, es decir, individuos que sin ser objetivo de las pesquerías son capturados por las artes de pesca, se ha convertido en un tema de preocupación mundial debido al impacto que su extracción significa para los ecosistemas. En el mar Caribe de Colombia opera una flota de pesca de arrastre dirigida al camarón que registra elevados niveles de captura acompañante. Las evaluaciones de las capturas de esta flota se han concentrado en las especies de peces principalmente y de inv...

  19. Selección de bacterias con capacidad degradadora de hidrocarburos aisladas a partir de sedimentos del Caribe colombiano.

    OpenAIRE

    Narváez-Florez, S.; Gómez, M. L.; Martínez, M.M.

    2008-01-01

    A partir de sedimentos del Caribe colombiano se realizaron 31 aislamientos bacterianos en medio mínimo de sales suplementado con hidrocarburos (ACPM o petróleo crudo) como única fuente de carbono. Las cepas aisladas se sometieron a pruebas de selección en diferentes concentraciones de hidrocarburos y se escogieron once de ellas tolerantes al crudo y ACPM en un ámbito del 1-8% v/v. Posteriormente, con las cepas seleccionadas, se conformó un cultivo bacteriano mixto y se evaluó su capacidad de ...

  20. Diagnóstico de seguridad vial en América Latina y El Caribe: 2005 - 2009

    OpenAIRE

    Rosana Brandao; Esteban Diez-Roux; Alejandro Pablo Taddia; Sissi Maribel De la Peña Mendoza; Elena de la Peña

    2013-01-01

    Este documento, que sirve de base a la Estrategia de seguridad vial del BID, es un análisis exhaustivo del estado de la seguridad vial en los países América Latina y el Caribe. El estudio incluye un análisis de los aspectos institucionales, de financiación, planes de seguridad vial, estadísticas de siniestros, infraestructura, parque vehicular, políticas educativas y de formación vial además de aspectos de legislación y normativa que han afectado a la región entre 2005 y 2009 en materia de se...

  1. Estado menopáusico y calidad de vida en mujeres del Caribe colombiano

    Directory of Open Access Journals (Sweden)

    Arteta-Acosta Cindy

    2011-09-01

    Full Text Available INTRODUCCIÓN: evaluar con “Menopause Rating Scale” la frecuencia y severidad de síntomas menopáusicos presentes en mujeressaludables de 40-69 años de edad que son originarias y residen en tres comunidades distintas del Caribe colombiano, agrupadassegún su estado menopáusico.MATERIALES Y MÉTODOS: estudio cross-sectional. Con instrumentos aplicados entre noviembre del 2006 y enero del 2009 a mujeressaludables entre 40 y 59 años de edad, tomadas de comunidades afrodescendientes, indígenas e hispánicas de la costa Caribecolombiana. Se aplicó la escala de calidad de vida “Menopause Rating Scale” en su versión en lengua española. Se llenaron 1257formularios. Se agruparon las pacientes por estado menopáusico: premenopausia, perimenopausia, posmenopausia. El análisis fuerealizado con SPSS 15.0. Los datos se expresan en medias con desviación estándar y en porcentajes. Se realizaron análisis noparamétricos para evaluar deferencias debido a la falta de normalidad de los datos. Una P<0,05 fue considerada significativa. Seobtuvo consentimiento informado por parte de las participantes.RESULTADOS: 1215 mujeres caribeñas colombianas se incluyeron en la evaluación, que hacen parte de un grupo mayor queconforman el estudio CAVIMEC (Calidad de vida en la Menopausia y Etnias Colombianas. 36.5% indígenas zenúes, 32.4% afrodescendientes y 31.0% mestizas, de las cuales 44% eran premenopáusicas, 47% perimenopáusicas y 54% posmenopáusicas. Elpuntaje total de MRS presentó aumento progresivo entre premenopausia, perimenopausia y posmenopausia (7,5 ±5,2, 11,7 ±4,7 y12,8 ±5,4 respectivamente. De premenopausia a perimenopausia se reveló un deterioro de la calidad de vida por aumento de todoslos items (P<0,05. A través de los estados menopáusicos, la sequedad vaginal, los problemas sexuales y las molestias músculoarticulares, mostraron un aumento progresivo, mientras los síntomas psicológicos, las molestias cardíacas y los

  2. CARIBIC DOAS observations of nitrous acid and formaldehyde in a large convective cloud

    Science.gov (United States)

    Heue, K.-P.; Riede, H.; Walter, D.; Brenninkmeijer, C. A. M.; Wagner, T.; Frieß, U.; Platt, U.; Zahn, A.; Stratmann, G.; Ziereis, H.

    2014-07-01

    The chemistry in large thunderstorm clouds is influenced by local lightning-NOx production and uplift of boundary layer air. Under these circumstances trace gases like nitrous acid (HONO) or formaldehyde (HCHO) are expected to be formed or to reach the tropopause region. However, up to now only few observations of HONO at this altitude have been reported. Here we report on a case study where enhancements in HONO, HCHO and nitrogen oxides (NOx) were observed by the CARIBIC flying laboratory (Civil Aircraft for the Regular Investigation of the atmosphere Based on an Instrument Container). The event took place in a convective system over the Caribbean Sea in August 2011. Inside the cloud the light path reaches up to 100 km. Therefore the DOAS instrument on CARIBIC was very sensitive to the tracers inside the cloud. Based on the enhanced slant column densities of HONO, HCHO and NO2, average mixing ratios of 37, 468 and 210 ppt, respectively, were calculated. These data represent averages for constant mixing ratios inside the cloud. However, a large dependency on the assumed profile is found; for HONO a mixing ratio of 160 ppt is retrieved if the total amount is assumed to be situated in the uppermost 2 km of the cloud. The NO in situ instrument measured peaks up to 5 ppb NO inside the cloud; the background in the cloud was about 1.3 ppb, and hence clearly above the average outside the cloud (≈ 150 ppt). The high variability and the fact that the enhancements were observed over a pristine marine area led to the conclusion that, in all likelihood, the high NO concentrations were caused by lighting. This assumption is supported by the number of flashes that the World Wide Lightning Location Network (WWLLN) counted in this area before and during the overpass. The chemical box model CAABA is used to estimate the NO and HCHO source strengths which are necessary to explain our measurements. For NO a source strength of 10 × 109 molec cm-2 s-1 km-1 is found, which

  3. Modeling the Crust and Upper Mantle in Northern Beata Ridge (CARIBE NORTE Project)

    Science.gov (United States)

    Núñez, Diana; Córdoba, Diego; Cotilla, Mario Octavio; Pazos, Antonio

    2016-05-01

    The complex tectonic region of NE Caribbean, where Hispaniola and Puerto Rico are located, is bordered by subduction zone with oblique convergence in the north and by incipient subduction zone associated to Muertos Trough in the south. Central Caribbean basin is characterized by the presence of a prominent topographic structure known as Beata Ridge, whose oceanic crustal thickness is unusual. The northern part of Beata Ridge is colliding with the central part of Hispaniola along a transverse NE alignment, which constitutes a morphostructural limit, thus producing the interruption of the Cibao Valley and the divergence of the rivers and basins in opposite directions. The direction of this alignment coincides with the discontinuity that could explain the extreme difference between west and east seismicity of the island. Different studies have provided information about Beata Ridge, mainly about the shallow structure from MCS data. In this work, CARIBE NORTE (2009) wide-angle seismic data are analyzed along a WNW-ESE trending line in the northern flank of Beata Ridge, providing a complete tectonic view about shallow, middle and deep structures. The results show clear tectonic differences between west and east separated by Beata Island. In the Haiti Basin area, sedimentary cover is strongly influenced by the bathymetry and its thickness decreases toward to the island. In this area, the Upper Mantle reaches 20 km deep increasing up to 24 km below the island where the sedimentary cover disappears. To the east, the three seamounts of Beata Ridge provoke the appearance of a structure completely different where sedimentary cover reaches thicknesses of 4 km between seamounts and Moho rises up to 13 km deep. This study has allowed to determine the Moho topography and to characterize seismically the first upper mantle layers along the northern Beata Ridge, which had not been possible with previous MCS data.

  4. NO and NOy in the upper troposphere: Nine years of CARIBIC measurements onboard a passenger aircraft

    Science.gov (United States)

    Stratmann, G.; Ziereis, H.; Stock, P.; Brenninkmeijer, C. A. M.; Zahn, A.; Rauthe-Schöch, A.; Velthoven, P. V.; Schlager, H.; Volz-Thomas, A.

    2016-05-01

    Nitrogen oxide (NO and NOy) measurements were performed onboard an in-service aircraft within the framework of CARIBIC (Civil Aircraft for the Regular Investigation of the atmosphere Based on an Instrument Container). A total of 330 flights were completed from May 2005 through April 2013 between Frankfurt/Germany and destination airports in Canada, the USA, Brazil, Venezuela, Chile, Argentina, Colombia, South Africa, China, South Korea, Japan, India, Thailand, and the Philippines. Different regions show differing NO and NOy mixing ratios. In the mid-latitudes, observed NOy and NO generally shows clear seasonal cycles in the upper troposphere with a maximum in summer and a minimum in winter. Mean NOy mixing ratios vary between 1.36 nmol/mol in summer and 0.27 nmol/mol in winter. Mean NO mixing ratios range between 0.05 nmol/mol and 0.22 nmol/mol. Regions south of 40°N show no consistent seasonal dependence. Based on CO observations, low, median and high CO air masses were defined. According to this classification, more data was obtained in high CO air masses in the regions south of 40°N compared to the midlatitudes. This indicates that boundary layer emissions are more important in these regions. In general, NOy mixing ratios are highest when measured in high CO air masses. This dataset is one of the most comprehensive NO and NOy dataset available today for the upper troposphere and is therefore highly suitable for the validation of atmosphere-chemistry-models.

  5. The complete plastid genome of Bunge's pine Pinus bungeana (Pinaceae).

    Science.gov (United States)

    Li, Zhong-Hu; Zhu, Juan; Yang, Yi-Xin; Yang, Jie; He, Jing-Wen; Zhao, Gui-Fang

    2016-07-01

    The complete nucleotide sequence of Bunge's pine Pinus bungeana Zucc. ex Endl. chloroplast genome (cp DNA) was determined in this study. The cpDNA was 117 861 bp in length, containing a pair of 475 bp inverted repeat regions (IRa and IRb), which were separated by large and small single copy regions (LSC and SSC) of 65 373 and 51 538 bp, respectively. The cpDNA contained 111 genes, including 71 protein-coding genes (71 PCG species), 4 ribosomal RNA genes (4 rRNA species) and 36 tRNA genes (32 tRNA species). In these genes, 13 harbored a single intron and 1 (ycf3) contained a couple of introns. The overall AT content of Bunge's pine cpDNA is 61.2%, while the corresponding values of the LSC, SSC and IR regions are 61.9%, 60.2% and 62.5%, respectively. A phylogenetic reconstruction based on the maximum parsimony analysis suggested that all the sampled Pinus species clustered a monophyletic clade and have a high bootstrap support, and the cpDNA of P. bungeana is closely related to that of congeneric P. gerardiana. PMID:26122332

  6. Stimulation of Pinus tropicalis M. seeds by magnetically treated water

    Directory of Open Access Journals (Sweden)

    A.P. Govea

    2007-06-01

    Full Text Available Magnetically treated water (MTW was used to stimulate the germination process of Pinus tropicalis M. seeds. This species of Pinus is an endemic of the western part of Cuba and at present is threatened due to a visible decrease that has been detected in its populations. The main cause of this decrease is the low seedling production at nurseries, since the germination percentage of this species rarely exceeds 50%. To carry out our work, normal water (water + ions was treated using 1200 G isotropic strontium magnets. This was done in two forms: statically and dynamically. The MTW was applied to the samples as irrigation water and as water for imbibition during 24 h. The results showed an increase in the germination percentage up to 70-81% with respect to the control samples (43% as well as greater seedling growth after germination. The best results were obtained while the treated water was applied dynamically and statically with initial inbibition. In this last case the germination percentages reached 81%, which represents an increase of 88 % compared to the control samples (43%.

  7. Regional Impact on Pollution Event in the Upper Troposphere during CARIBIC Flights between South China and the Philippines

    Science.gov (United States)

    Lai, S. C.; Baker, A. R.; Schuck, T. J.; van Velthoven, P.; Oram, D. E.; Zahn, A.; Hermann, M.; Weigelt, A.; Slemr, S.; Brenninkmeijer, C. A. M.

    2010-05-01

    The research project CARIBIC (Civil Aircraft for the Regular Investigation of the atmosphere Based on an Instrumented Container, phase II) is designed to conduct regular, long-term and detailed observations of the free troposphere and UT/LS regions where passenger aircraft happen to cruise. A fully-automated measurement container (1.5 tons) was equipped onboard an Airbus 340-600 operated by Lufthansa Airlines during regular passenger flights to conduct real time trace gas and aerosol measurements and to collect aerosol and air samples on a near monthly basis. During May 2005 - March 2008, CARIBIC observations have been performed along the flight tracks of Frankfurt-Guangzhou-Manila. Data have been collected in the upper troposphere during a total of 81 flights over the region between South China and the Philippines. Carbon monoxide was used an indicator to identify the pollution events and to access the regional impacts of fossil fuel burning and biomass/biofuel burning on upper tropospheric air. Five regions, i.e. Northeast Asia, South China, Indochina Peninsula, India and Indonesia/Philippines, are identified as the major source regions to be related to the observed pollution events. The characteristics of the events from these regions are investigated. The contributions of different source categories are also estimated.

  8. Interaction between research and diagnosis and surveillance of avian influenza within the Caribbean animal health network (CaribVET).

    Science.gov (United States)

    Lefrançois, T; Hendrikx, P; Vachiéry, N; Ehrhardt, N; Millien, M; Gomez, L; Gouyet, L; Gerbier, G; Gongora, V; Shaw, J; Trotman, M

    2010-04-01

    The Caribbean region is considered to be at risk for avian influenza (AI) because of predominance of the backyard poultry system, important commercial poultry production, migratory birds and disparities in the surveillance systems. The Caribbean animal health network (CaribVET) has developed tools to implement AI surveillance in the region: (i) a regionally harmonized surveillance protocol, (ii) specific web pages for AI surveillance on http://www.caribvet.net, and (iii) a diagnostic network for the Caribbean including AI virus molecular diagnostic capability in Guadeloupe and technology transfer. Altogether 303 samples from four Caribbean countries were tested between June 2006 and March 2009 by real time PCR either for importation purposes or following clinical suspicion. Following AI H5N2 outbreaks in the Dominican Republic in 2007, a questionnaire was developed to collect data for risk analysis of AI spread in the region through fighting cocks. The infection pathway of Martinique commercial poultry sector by AI through introduction of infected cocks was designed and recommendations were provided to the Caribbean veterinary services to improve fighting cock movement controls and biosecurity measures. Altogether, these CaribVET activities contribute to strengthen surveillance of AI in the Caribbean region and may allow the development of research studies on AI risk analysis. PMID:20537093

  9. Mitos clásicos en el teatro del Caribe. Esbozo y sistematización de un corpus

    Directory of Open Access Journals (Sweden)

    Gustavo Herrera Díaz

    2014-04-01

    Full Text Available P { margin-bottom: 0.21cm; }A:link { } Resumen: En la última década del siglo XX y a principios del siglo XXI, con la realización de algunos congresos y estudios académicos, se ha comenzado a valorar la presencia de los mitos clásicos en el teatro iberoamericano. Ello ha posibilitado el rescate y análisis de un creciente e importante corpus de obras que continuamente se actualiza con nuevas puestas en escena y enfoques. Una línea de investigación valiosa al respecto ha sido la de intentar sistematizar, desde múltiples métodos y teorías, todo el repertorio encontrado. Los estudios de Costa Palamides y Elina Miranda, por mencionar algunos de los más conocidos, son valiosos aportes a este propósito. En este marco se inserta el presente trabajo que, partiendo de estudios anteriores y del rastreo de nuevas producciones dramáticas, aspira contribuir a la actualización y sistematización del corpus caribeño existente, así como revelar nuevas tendencias. Nos enfocamos especialmente en las obras de las Antillas hispanas, puestas en relación con las producidas en otras áreas del Caribe.

  10. Á contre-courant : les mobilités caribéennes vers l’Éthiopie

    Directory of Open Access Journals (Sweden)

    Giulia Bonacci

    2008-09-01

    Full Text Available L’article s’intéresse à la migration des Caribéens vers l’Ethiopie, et notamment celle des Rastafariens qui se définissent comme de « vrais Éthiopiens » et se disent « rapatriés » en Éthiopie. En dépit de leur nombre limité, ils n’en sont pas moins importants car ils illustrent la persistance et les transformations des imaginaires et idéologies liant les Noirs du monde à l’Éthiopie ainsi qu’un pan méconnu des mobilités caribéennes qui, se dirigeant vers l’Afrique, se découvrent complètement à contre-courant.The article deals with Caribbean migration towards Ethiopia, and especially the one of Rastafarians who define themselves as ‘true Ethiopians’ and ‘repatriates’ in Ethiopia. Despite their limited number, their experience is nonetheless important as it reveals the persistence and change in imaginaries and ideologies linking black all over the world to Ethiopia as well as unknown Caribbean mobility towards Africa, a mobility which is driven against the current.

  11. Some soil properties and microbial biomass of Pinus maritima, Pinus pinea and Eucalyptus camaldulensis from the Eastern Mediterranean coasts

    Directory of Open Access Journals (Sweden)

    Nacide Kizildag

    2012-12-01

    Full Text Available Background: Salt-affected soils occupy wide areas that have ecological importance in semi-arid and arid regions. Excessive amounts of salt have adverse effects on soil physical and chemical properties and also on the microbiological processes. The soils of Pinus maritima, Pinus pinea, and Eucalyptus camaldulensis were found to be under salinity stress in the present study area. Thus, the carbon, nitrogen, phosphorus contents, microbial biomass, and carbon mineralization were determined in the soils sampled from the Tarsus-Karabucak Forest of the Eastern Mediterranean Region (Turkey. Method: Carbon mineralization of all samples was measured by the CO2 respiration method over 30 d at 28�C and constant moisture. Results: There were no significant differences in the carbon mineralization among the soils. The average fungi count in 1 g of air dried soils of E. camaldulensis, P. pinea, and P. maritima were found to be a 72000 colony forming unit (cfu/g, 25300 cfu/g, and 28500 cfu/g, respectively. The total bacterial counts were 4x103 cfu/g, 10x103 cfu/g, and 7x103 cfu/g and the counts of anaerobic bacteria were 17800 cfu/g, 42900 cfu/g, and 27300 cfu/g, respectively. Conclusion: It is possible to conclude that salt, as an ecological factor, had no effect on microbial activity. This may be as a result of heavy rains which decreased the salt concentrations of the soil in the sampling region.

  12. Seedling shoot, needle and bud development in three provenances of Pinus sylvestris and Pinus contorta cultivated in northern Sweden

    Energy Technology Data Exchange (ETDEWEB)

    Norgren, O. [Swedish Univ. of Agricultural Sciences, Umeaa (Sweden). Dept. of Silviculture; Little, C.H.A. [Canadian Forest Service, Fredricton, NB (Canada); Sundblad, L.G. [Forestry Research Inst. of Sweden, Saevar (Sweden)

    1996-12-31

    The patterns of current-year shoot, needle and terminal bud elongation in seedlings of three Scots pine (Pinus sylvestris L.) and three lodgepole pine (Pinus contorta Dougl. var. latifolia Engelm.) provenances were compared during the third and fourth growing seasons after planting. Lodgepole pine produced longer shoots and buds than did Scots pine, mainly because lodgepole pine formed more stem units and elongated at a faster rate. Stem unit length and the duration of shoot and bud elongation differed relatively little between species and provenances. Lammas or polycyclic growth occurred in some lodgepole pine provenances, but not in any Scots pine provenance, and was associated with enhanced shoot elongations. Needle elongation commenced earlier, proceeded at a faster rate, and was greater in lodgepole pine than in Scots pine, but ceased about the same time in all species and provenances. The heat sum required to attain 50% of final length was lower for shoots and needles in lodgepole pine than in Scots pine, and for shoots in northern provenances than in southern ones. Mitotic activity in the apical meristem of the terminal bud, which occurred less than one week after the seedlings were free from snow, started and ceased about the same time in each species, but was higher in lodgepole pine than in Scots pine early in the shoot elongation period. 36 refs, 2 figs, 3 tabs

  13. Adaptive Differentiation in Seedling Traits in a Hybrid Pine Species Complex, Pinus densata and Its Parental Species, on the Tibetan Plateau

    OpenAIRE

    Meng, Jingxiang; Mao, Jian-Feng; Zhao, Wei; Xing, Fangqian; Chen, Xinyu; Hao LIU; Xing, Zhen; Wang, Xiao-Ru; Li, Yue

    2015-01-01

    Evidence from molecular genetics demonstrates that Pinus densata is a natural homoploid hybrid originating from the parent species Pinus tabuliformis and Pinus yunnanensis, and ecological selection may have played a role in the speciation of Pinus densata. However, data on differentiation in adaptive traits in the species complex are scarce. In this study, we performed a common garden test on 16 seedling traits to examine the differences between Pinus densata and its parental species in a hig...

  14. Individual Growth Environment Suitable for Naturally Regenerated Young Pinus koraiensis under Secondary Natural Forest

    Institute of Scientific and Technical Information of China (English)

    FANShaohui; ZHANGQun; SHENHailong

    2004-01-01

    Impacts on growth of young trees of Pinus Koraiensis of 6 environmental factors of intensity of sunlight, direct sunlight, thickness of soil humus, neighboring trees, upper canopy species, herbs and shrubs were investigated on young tree of Pinus Koraiensis and 4 neighboring trees which are considered the structural unit of the microenvironment. Results indicated that the 6 environmental factors under investigation had effects, to various extents, on growth of the young trees. Based on the findings, suitable growing conditions for regenerated young tree of Pinus Koraiensis under forest were identified and corresponding silvicultural measures were proposed for operational practice.

  15. Análisis biogeográfico de la flora de un bosque seco tropical (bs-T en el Caribe colombiano

    Directory of Open Access Journals (Sweden)

    Cortés Rocío

    2006-06-01

    Full Text Available Con el propósito de encontrar las afinidades florísticas de un bosque seco tropical (bs-T en el Caribe colombiano
    y las regiones con las que, históricamente, se encuentra mejor relacionado, se evaluaron las distribuciones de 183 especies de la flora de la Hacienda “El Ceibal”. Ésto se realizó mediante un análisis de similitud de áreas, y bajo un enfoque panbiogeográfico. Se encontró que las áreas más afines actualmente con la flora del “El Ceibal” son los bosques húmedos y secos centroamericanos, bosque húmedo de Urabá-Magdalena y los valles interandinos de Colombia. En cuanto a la panbiogeografía, se obtuvieron cuatro trazos generalizados, que coinciden en la conexión con las áreas centroamericanas, la Serranía del Perijá, Guajira, la costa Caribe venezolana y los valles interandinos de Colombia. También se evidencia la relación, no muy fuertemente respaldada, del bosque seco del Caribe colombiano con áreas del centro y sur de Suramérica. Los trazos coinciden con los obtenidos por numerosos trabajos, especialmente sobre la biota mesoamericana. Estas
    relaciones evidencian el carácter caribeño de la flora de la Hacienda “El Ceibal” y su complejidad biogeográfica.
    En adelante, para llegar a aproximaciones precisas de la historia evolutiva del Caribe, será preciso aplicar métodos de biogeografía cladística o filogenética.

  16. SO2 and BrO observation in the plume of the Eyjafjallajökull volcano 2010: CARIBIC and GOME-2 retrievals

    Directory of Open Access Journals (Sweden)

    P. F. J. van Velthoven

    2011-03-01

    Full Text Available The ash cloud of the Eyjafjallajökull (also referred to as: Eyjafjalla (e.g. Schumann et al., 2011, Eyjafjöll or Eyjafjoll (e.g. Ansmann et al., 2010 volcano on Iceland caused closure of large parts of European airspace in April and May 2010. For the validation and improvement of the European volcanic ash forecast models several research flights were performed. Also the CARIBIC (Civil Aircraft for the Regular Investigation of the atmosphere Based on an Instrument Container flying laboratory, which routinely measures at cruise altitude (≈11 km performed three dedicated measurements flights through sections of the ash plume. Although the focus of these flights was on the detection and quantification of the volcanic ash, we report here on sulphur dioxide (SO2 and bromine monoxide (BrO measurements with the CARIBIC DOAS (Differential Optical Absorption Spectroscopy instrument during the second of these special flights on 16 May 2010. As the BrO and the SO2 observations coincide, we assume the BrO to have been formed inside the volcanic plume. Average SO2 and BrO mixing ratios of ≈40 ppb and ≈5 ppt respectively are retrieved inside the plume. The BrO to SO2 ratio retrieved from the CARIBIC observation is ≈1.3×10−4. Both SO2 and BrO observations agree well with simultaneous satellite (GOME-2 observations. SO2 column densities retrieved from satellite observations are often used as an indicator for volcanic ash. As the CARIBIC O4 column densities changed rapidly during the plume observation, we conclude that the aerosol and the SO2 plume are collocated. For SO2 some additional information on the local distribution can be derived from a comparison of forward and back scan GOME-2 data. More details on the local plume size and position are retrieved by combining CARIBIC and GOME-2 data.

  17. Interpopulation variability of Austrian pine (Pinus nigra Arnold in Serbia

    Directory of Open Access Journals (Sweden)

    Lučić Aleksandar

    2013-01-01

    Full Text Available Multidisciplinary studies (genetic and phytocoenological of 4 populations of Austrian pine (Pinus nigra Arnold were carried out in western and central Serbia. The obtained results gave the same inter-population arrangement in both methods. Dendograms (NTSYS differentiate at the greatest genetic distance the population of Austrian pine in Šargan compared to other populations: Crni Vrh, Goč and Studenica. Using phytocoenological analysis it was determined that population of Austrian pine in Šargan forms a community Erico-Pinetum gocensis, while the other populations form a community Seslerio rigidae-Pinetum gocensis. Multidisciplinary approach that was demonstrated within this paper presents the first studies of Austrian pine that directly link genotype dependence and environmental conditions manifested through the phytocoenological affiliation. [Projekat Ministarstva nauke Republike Srbije, br. TR 31070

  18. Anatomic Study of Female Sterility of Pinus tabulaeformis Carr.

    Institute of Scientific and Technical Information of China (English)

    Cheng Pengjun; Li Fenglan; Zheng Caixia

    2003-01-01

    The anatomic research on the mutant clone of Pinus tabulaeformis Carr. in the seed orchard in Xingcheng, LiaoningProvince was carried out. The female cone of the mutant clone looked like normal, but its ovules degenerated in the early stage. Thispaper tries to find out the reason and time of ovule abortion. It seems that the ovule abortion is probably caused by female sterilitybecause the microspores of this mutant clone were normal. Through the serial observations on the one-year-old macrosporangiatesand the ovules of two-year-old female cones of mutant and normal clone, it is found that the reason of ovule abortion in mutant cloneis the failure of the mitosis of free nuclei in the female gametophyte, and the time is about in the early April.

  19. ESTABLISHMENT OF Pinus elliottii Engelm STANDS WITH DIRECT FIELD SOWING

    Directory of Open Access Journals (Sweden)

    César Augusto Guimarães Finger

    2010-08-01

    Full Text Available This experiment was undertaken to test the possibility of use of direct field sowing as a method of  forest formation. The soil preparation consisted of mechanic mowing followed by cleaning of small circles of 40 cm of diameter, where four seeds of Pinus elliottii Engelm were sowed, previously stratified, and protected by a bottomless plastic glass fastened to the sowing point. The treatments tested were direct sowing, sowing of seeds involved by paper envelop and seedling plantation as testify treatment. The results were not satisfactory, however, being observed at the most 38.46% of the sowing places with seedlings after 84 days of sowing. The main factor that contribuited to the failure of the method was seedling mortality caused by water deficit and high temperatures.

  20. Endobacteria in some ectomycorrhiza of Scots pine (Pinus sylvestris).

    Science.gov (United States)

    Izumi, Hironari; Anderson, Ian C; Alexander, Ian J; Killham, Ken; Moore, Edward R B

    2006-04-01

    The diversity of cultivable endobacteria associated with four different ectomycorrhizal morphotypes (Suillus flavidus, Suillus variegatus, Russula paludosa and Russula sp.) of Scots pine (Pinus sylvestris) was analysed by restriction fragment length polymorphism profiling of PCR-amplified rDNA intergenic spacer regions and by sequence analyses of 16S rRNA genes. Ectomycorrhizal root tip surface-sterilization methods were developed and assessed for their efficiencies. Bacterial communities from surface-sterilized ectomycorrhizal root tips were different from those of ectomycorrhizal root tips without surface-sterilization for all the morphotypes studied. Endobacteria belonging to the genera Pseudomonas, Burkholderia and Bacillus were isolated from more than one ectomycorrhizal morphotype, whereas species of Rahnella, Janthinobacterium and Rhodococcus were only isolated from the single morphotypes of S. variegatus, R. paludosa and Russula sp., respectively. Some of the isolated endobacteria utilized fungal sugars more readily than typical plant sugars in carbon utilization assays. PMID:16542403

  1. Quality of Pinus elliottii sawn timber from tapped forests

    Directory of Open Access Journals (Sweden)

    Pedro Henrique Gonzalez de Cademartori

    2012-12-01

    Full Text Available This study aimed to characterize the quality of Pinus elliottii sawn timber extracted from tapped forests and processed in a sawmill in São José do Norte (RS. Four butt logs and four upper logs for each of the three existing diameter grades were selected and sawed. The wood pieces were analyzed after sawing and after kiln drying. The presence of knots, which occurred due to the absence of forest management and influenced the qualitative classification of the wood pieces, was observed mainly in the samples from upper logs. The process of resin tapping contributed to a higher incidence of resin pockets in the samples from butt logs, also influencing the qualitative classification of the samples. The appearance of drying defects did not modify the classification of the wood samples from butt and upper logs.

  2. Vulnerabilidad, pobreza y desastres 'socioculturales' en Centroamérica y El Caribe

    Directory of Open Access Journals (Sweden)

    Salas Serrano, Julián

    2007-12-01

    Full Text Available This paper analyses and quantifies the relative level of risk in a geographical area that is vulnerable to natural phenomena and with a high proportion of its population in a situation of residential poverty. We deduce that the hazard in the area, composed of nine Central American and Caribbean countries, is significantly higher than the world average. The first aspect is covered in the sections Population at risk and Natural phenomena, which analyse the "study area". The second aspect is covered by Poverty in the "study area", various analyses of the physical situation in the target area, inhabited by almost 160 million people. Contrasted information is used as a basis for the concepts underpinning the extraordinary presence and seriousness of the socio-natural phenomena in this area. The interrelationship between th degree of vulnerability and poverty leads to the conclusion that these are the primary causes of disaster-related destruction, which in a 33 year period (1972 to 2005 has left an annual average of 20,000 human lives lost, 250,000 directly affected and approximately ten billion dollars in material damage.El trabajo pretende el estudio y cuantificación del riesgo relativo en una geografía física propensa a los fenómenos naturales y con una alta proporción de población en situación de pobreza habitacional, del que se deduce que el riesgo en la zona conformada por nueve países –de Centroamérica y el Caribe- es extraordinariamente superior a la media mundial. Del primer aspecto se ocupan los apartados relativos a delimitar el 'Área de Estudio': fenómenos naturales y población bajo riesgo. El segundo aspecto se aborda estudiando la situación material objetiva en la que se alojan y viven casi 160 millones de habitantes: Pobreza en el 'Área de Estudio'. En base a información contrastada se articulan los fundamentos en los que se sustenta la extraordinaria presencia y gravedad de los fenómenos 'socionaturales' en la

  3. The stable isotopic composition of molecular hydrogen in the tropopause region probed by the CARIBIC aircraft

    Science.gov (United States)

    Batenburg, A. M.; Schuck, T. J.; Baker, A. K.; Zahn, A.; Brenninkmeijer, C. A. M.; Röckmann, T.

    2012-05-01

    More than 450 air samples that were collected in the upper troposphere - lower stratosphere (UTLS) region by the CARIBIC aircraft (Civil Aircraft for the Regular Investigation of the atmosphere Based on an Instrument Container) have been analyzed for molecular hydrogen (H2) mixing ratios (χ(H2)) and H2 isotopic composition (deuterium content, δD). More than 120 of the analyzed samples contained air from the lowermost stratosphere (LMS). These show that χ(H2) does not vary appreciably with O3-derived height above the thermal tropopause (TP), whereas δD does increase with height. The isotope enrichment is caused by H2 production and destruction processes that enrich the stratospheric H2 reservoir in deuterium (D); the exact shapes of the profiles are mainly determined by mixing of stratospheric with tropospheric air. Tight negative correlations are found between δD and the mixing ratios of methane (χ(CH4)) and nitrous oxide (χ(N2O)), as a result of the relatively long lifetimes of these three species. The correlations are described by δD[‰]=-0.35 · χ(CH4)[ppb]+768 and δD[‰]=-1.90· χ(N2O)[ppb]+745. These correlations are similar to previously published results and likely hold globally for the LMS. Samples that were collected from the Indian subcontinent up to 40° N before, during and after the summer monsoon season show no significant seasonal change in χ(H2), but δD is up to 12.3‰ lower in the July, August and September monsoon samples. This δD decrease is correlated with the χ(CH4) increase in these samples. The significant correlation with χ(CH4) and the absence of a perceptible χ(H2) increase that accompanies the δD decrease indicates that microbial production of very D-depleted H2 in the wet season may contribute to this phenomenon. Some of the samples have very high χ(H2) and very low δD values, which indicates a pollution effect. Aircraft engine exhaust plumes are a suspected cause, since the effect mostly occurs in samples

  4. Observations of Non-Methane Hydrocarbons Over India During the Asian Summer Monsoon Period: Results from CARIBIC

    Science.gov (United States)

    Baker, A. K.; Schuck, T. J.; Slemr, F.; Brenninkmeijer, C. A.

    2008-12-01

    The CARIBIC project (Civil Aircraft for the Regular Investigation of the Atmosphere Based on an Instrument Container, www.caribic-atmospheric.com) involves the monthly deployment of an instrument container equipped to make atmospheric measurements from onboard a long-range commercial airliner. Since December 2004, flights for the second phase of CARIBIC have been aboard a Lufthansa Airbus A340-600 traveling between Frankfurt, Germany and destinations in Asia, North America and South America. The instrument package housed in the container (1.5 ton) is fully automated and during each monthly set of flights carries out a variety of real-time trace gas and aerosol measurements, and also collects 28 air samples, which are analyzed upon return to the laboratory. Routine measurements made from the sampling flasks include non-methane hydrocarbon (NMHC) analysis, and these measurements provide the basis for the data presented here. Between April and September of 2008, the container was deployed monthly on two sequential roundtrip flights between Frankfurt and Chennai, India. To achieve greater resolution, air samples were collected only on the first of the roundtrip flights, with 14 samples collected on the flight to Chennai and 14 collected on the return. These flights provided the opportunity to study the composition of the upper troposphere in this region during the Asian summer monsoon period (typically June-September), which is characterized by anticyclonic circulation in the upper troposphere coupled with deep convection. Samples collected during the monsoon period exhibit elevated levels of NMHCs relative to samples collected outside of the monsoon period, with enhancements in ethyne and benzene being more substantial than enhancements in the alkanes. Enhanced mixing ratios are observed between 15N and 40N, and correspond to enhancements in other trace gases, namely methane and CO. Ethyne in particular is strongly correlated with both methane and CO in this region

  5. Monitoring organic nitrogen species in the UT/LS - a new system for analysis of CARIBIC whole air samples

    Science.gov (United States)

    Sauvage, Carina; Thorenz, Ute; Baker, Angela; Brenninkmeijer, Carl; Williams, Jonathan

    2014-05-01

    The CARIBIC project is a unique program for long term and global scale monitoring of the atmosphere (http://www.caribic-atmospheric.com). An instrument container is installed monthly into a civil aircraft operated by Lufthansa (Airbus A 340-600) and makes atmospheric observations en route from Frankfurt, Germany to various destinations around the globe. In four to six long distance flights at a cruising altitude of 10 to 12 km online measurements of various atmospheric tracers are performed during the flight as well as whole air samples are taken with two different sampling units (116 samples in both glass and stainless steel canisters). These samples are routinely analyzed for greenhouse gases, non-methane hydrocarbons (NMHC) and halogenated compounds. Nitrogen containing compounds play various important roles in the atmosphere. Alkyl nitrates (RONO2) are products of the reaction of NMHC with OH and other oxidants in the presence of NO. They can provide information on the oxidative history of an air mass. Moreover they influence photolchemical ozone formation and act as a transport mechanism for reactive nitrogen. Less reactive nitrogen containing species such as HCN and acetonitrile are important markers for biomass burning, while organic amines are involved in gas to particle partitioning. Finally N2O is a long lived nitrogen containing gas important for the Earth's radiative budget. Regular measurements of such nitrogen compounds would therefore be a significant contribution to the CARIBIC data set. Especially for high altitude samples, in which the mixing ratios of many species are expected to be in the low ppt range, a highly sensitive method for analysis is required. Therefore a new system for measurement of nitrogen compounds has been built up, comprising a gas chromatograph (GC) using a nitrogen chemiluminescence detector (NCD). An important advantage of the NCD is that it is selective for nitrogen and equimolar. The nitrogen compounds are sequentially pre

  6. Macroalgas marinas afectadas por flotas de arrastre de camarón en el Mar Caribe de Colombia

    Directory of Open Access Journals (Sweden)

    Duarte Luis O.

    2005-12-01

    Full Text Available La captura acompañante, es decir, individuos que sin ser objetivo de las pesquerías son capturados por las artes de pesca, se ha convertido en un tema de preocupación mundial debido al impacto que su extracción significa para los ecosistemas. En el mar Caribe de Colombia opera una flota de pesca de arrastre dirigida al camarón que registra elevados niveles de captura acompañante. Las evaluaciones de las capturas de esta flota se han concentrado en las especies de peces principalmente y de invertebrados en menor grado, pero en la actualidad no existe un estudio que evalúe la composición taxonómica y brinde indicios sobre el efecto que tienen la pesca de arrastre en las comunidades de macroalgas, a pesar de que estas comunidades juegan un rol importante en la estructura y complejidad de los ecosistemas. Este estudio evaluó la composición taxonómica y biomasa de macroalgas registrada en muestreos a bordo de las flotas de arrastre de camarón en las zonas de pesca ubicadas al norte y sur del mar Caribe colombiano durante los meses de agosto, septiembre y octubre de 2004. Se obtuvo un total de 15 taxa de macroalgas en las dos zonas de pesca. El género más frecuente fue Sargassum, lo cual puede deberse a que su estrategia de vida pelágica y bentónica lo hace más vulnerable a la acción de las redes en los fondos. Las abundancias de algas fueron muy similares
    en ambas sitios de estudio. La biomasa de macroalgas registradas en cada lance fue mucho menor que la registrada de camarones y descartes. La evidencia que presenta este estudio sobre la existencia de macroalgas en la captura acompañante de la flota de arrastre de camarón y la acción prolongada de esta pesquería en el mar Caribe de Colombia, indican que es urgente implementar modificaciones en las redes para disminuir su efecto abrasivo sobre los fondos.

  7. Physiological basis for multiplication of Scots pine (Pinus sylvestris) using tissue culture

    OpenAIRE

    Andersone-Ozola, Una

    2009-01-01

    Physiological basis for multiplication of Scots pine (Pinus sylvestris) using tissue culture The aim of the present study was to create the physiological basis for micropropagation of mature Pinus sylvestris L. in tissue culture. The most suitable time for introduction in vitro of mature P. sylvestris bud tissue was from July to late October. Long cold storage of dormant mature Scots pine buds before introduction in vitro increases their morphogenic competence in tissue cult...

  8. Interspecific gene flow and ecological selection in a pine (Pinus sp.) contact zone

    OpenAIRE

    Wachowiak, Witold; Cavers, Stephen; Zukowska, Weronika B.

    2015-01-01

    Nucleotide polymorphisms in a set of nuclear genes were studied in a sympatric population of pines Pinus mugo and Pinus sylvestris that includes trees classified as pure species and polycormic (multi-stemmed)individuals of potentially hybrid origin. Patterns of genetic diversity were compared between those groups of samples and to the reference allopatric populations of the species in Europe. Polymorphisms at the gene loci clearly distinguished pure parental species as measured by conve...

  9. Distribution of Pine Woolly Adelgids Infestation on Pinus merkusii Plantation in Java

    OpenAIRE

    Oemijati Rachmatsyah; Ulfah Juniarti Siregar; Noor Farikhah Haneda; Dodi Nandika; Purnama Hidayat

    2012-01-01

    Pine woolly adelgid is a recently found exotic pest attacking seedling up to grown plants of Pinus merkusii plantations forest. Since its discovery, there were not much information about it.  The objectives of this research were to study pine woolly adelgids distribution, symptoms and indicators, and its scale of infestations on Pinus merkusii plantation in Java, to determine the presence of any specific P. merkusii sites invaded by pine woolly adelgids, considering the pests were native...

  10. Mycorrhiza-like structures in rooted microshoots of Pinus pinea L.

    OpenAIRE

    Castro, Mário Rui da Costa Basílio e; Ragonezi Gomes Lopes, Carla Aparecida; Klimaszewska, Krystyna; Lima, Mónica; Oliveira, Paulo Guilherme de; Zavattieri, Maria Amely

    2010-01-01

    Pinus pinea L. (stone pine) is one of the major plantation species in Iberian Peninsula, being Portugal the largest edible seed producer in the world. The induction and improvement of in vitro rhizogenesis of microshoots of Pinus pinea was developed in our laboratory using a co-culture system with ECM fungi. In the acclimation phase in mixed substrates, or in rhizotrons, anatomical and morphological studies were done to observe the evolution of the root system in microshoots from the co-cultu...

  11. Determination of sugar content in Pinus pinaster and its corresponding hollocellulose, cellulose and kraft pulps

    OpenAIRE

    Duarte, Ana Paula; Gaiolas, Carla; Belgacem, Mohamed Naceur; Simões, Rogério Manuel dos Santos

    2010-01-01

    This paper deals with the study of the polysaccharide complex from Portuguese Pinus pinaster, as well as from its main components, i.e., holocellulose, cellulose and pulps obtained using different cooking conditions. Nordic Pinus sylvestris was also studied in order to compare it with Portuguese pine. Two methods were used: one consisted of the hydrolysis of polysaccharides with trifluoroacetic acid (TFA) and quantification of the amount of each sugar using High Performance Liquid Chromatogra...

  12. Belowground legacies of Pinus contorta invasion and removal result in multiple mechanisms of invasional meltdown.

    Science.gov (United States)

    Dickie, Ian A; St John, Mark G; Yeates, Gregor W; Morse, Chris W; Bonner, Karen I; Orwin, Kate; Peltzer, Duane A

    2014-01-01

    Plant invasions can change soil biota and nutrients in ways that drive subsequent plant communities, particularly when co-invading with belowground mutualists such as ectomycorrhizal fungi. These effects can persist following removal of the invasive plant and, combined with effects of removal per se, influence subsequent plant communities and ecosystem functioning. We used field observations and a soil bioassay with multiple plant species to determine the belowground effects and post-removal legacy caused by invasion of the non-native tree Pinus contorta into a native plant community. Pinus facilitated ectomycorrhizal infection of the co-occurring invasive tree, Pseudotsuga menziesii, but not conspecific Pinus (which always had ectomycorrhizas) nor the native pioneer Kunzea ericoides (which never had ectomycorrhizas). Pinus also caused a major shift in soil nutrient cycling as indicated by increased bacterial dominance, NO3-N (17-fold increase) and available phosphorus (3.2-fold increase) in soils, which in turn promoted increased growth of graminoids. These results parallel field observations, where Pinus removal is associated with invasion by non-native grasses and herbs, and suggest that legacies of Pinus on soil nutrient cycling thus indirectly promote invasion of other non-native plant species. Our findings demonstrate that multi-trophic belowground legacies are an important but hitherto largely unconsidered factor in plant community reassembly following invasive plant removal. PMID:25228312

  13. Belowground legacies of Pinus contorta invasion and removal result in multiple mechanisms of invasional meltdown

    Science.gov (United States)

    Dickie, Ian A.; St John, Mark G.; Yeates, Gregor W.; Morse, Chris W.; Bonner, Karen I.; Orwin, Kate; Peltzer, Duane A.

    2013-01-01

    Plant invasions can change soil biota and nutrients in ways that drive subsequent plant communities, particularly when co-invading with belowground mutualists such as ectomycorrhizal fungi. These effects can persist following removal of the invasive plant and, combined with effects of removal per se, influence subsequent plant communities and ecosystem functioning. We used field observations and a soil bioassay with multiple plant species to determine the belowground effects and post-removal legacy caused by invasion of the non-native tree Pinus contorta into a native plant community. Pinus facilitated ectomycorrhizal infection of the co-occurring invasive tree, Pseudotsuga menziesii, but not conspecific Pinus (which always had ectomycorrhizas) nor the native pioneer Kunzea ericoides (which never had ectomycorrhizas). Pinus also caused a major shift in soil nutrient cycling as indicated by increased bacterial dominance, NO3-N (17-fold increase) and available phosphorus (3.2-fold increase) in soils, which in turn promoted increased growth of graminoids. These results parallel field observations, where Pinus removal is associated with invasion by non-native grasses and herbs, and suggest that legacies of Pinus on soil nutrient cycling thus indirectly promote invasion of other non-native plant species. Our findings demonstrate that multi-trophic belowground legacies are an important but hitherto largely unconsidered factor in plant community reassembly following invasive plant removal. PMID:25228312

  14. Construyendo una ‘Vía Láctea’ desde Dinamarca hasta América Latina y El Caribe

    OpenAIRE

    Ramírez, Jacobo; Modrow, Sven Benjamin

    2015-01-01

    Un día lluvioso de Septiembre de 2014, Janus Skøt, Director de Arla Foods en América Latina y el Caribe (LATAM), observaba la gran Ciudad de México a través de la ventana de su oficina ubicada en un décimo piso. Mientras la lluvia caía, él meditaba: “Cuán impresionante es la vista de la Ciudad de México con sus 25 millones de habitantes” (Skøt, 2014a). El panorama le recordó la posición de su firma, que lo llevó a reflexionar: “Estamos viendo a millones de posibles consumidores, p...

  15. Branchiosyllis salazari sp. n. (Polychaeta, Syllidae del Caribe noroccidental y comentarios sobre el material tipo de B. exilis (Gravier, 1900

    Directory of Open Access Journals (Sweden)

    Ruiz-Ramírez, J. D.

    2008-12-01

    Full Text Available Branchiosyllis salazari sp. n. (Polychaeta, Syllidae del Caribe noroccidental y comentarios sobre el material tipo de B. exilis (Gravier, 1900 On the basis of 195 specimens from the Northwestern Caribbean Sea, a new species of Branchiosyllis Ehlers, 1887 is described. Branchiosyllis salazari n. sp. has three pairs of eyes (two small pairs above the anterior margin of the prostomium, the third pair in a transverse line, without branchia, setae with large hooked blades in median setigers, and proventricle without middorsal line. The type material of B. exilis (Gravier, 1900, an apparently circumtropical species, was revised to clarify its presence in the Caribbean Sea. Its diagnostic features are: two pairs of eyes in a transverse line, no branchia, setae with large hooked blades in posterior setigers only, and proventricle with a middorsal line of Diamond-shaped cells. A key for the seven species of Branchiosyllis in the Grand Caribbean is included.

  16. Costos del ALCA para América Latina y el Caribe: el caso de los aranceles

    Directory of Open Access Journals (Sweden)

    Francisco Leonardo Saavedra

    2003-01-01

    Full Text Available Este trabajo muestra los efectos de la apertura comercial en América Latina (AL y el Caribe en los sectores industrial y agrícola, particularmente en cuanto a la reducción y recomposición de la planta productiva y su efecto en los niveles de empleo, ingreso y pobreza. Nuestro propósito es mostrar que la posible puesta en práctica del Área de Libre Comercio de las Américas (ALCA reforzaría el sentido de la apertura. También abordamos sus probables repercusiones en el sector externo, que implicarían una reestructuración de los flujos comerciales en la región y su mayor dependencia de los mercados norteamericano y canadiense.

  17. Inscribir, mostrar y recrear una cicatriz: infancia y escritura en la novela autobiográfica del Caribe

    Directory of Open Access Journals (Sweden)

    Claudia Amigo

    2013-12-01

    Full Text Available ¿Qué papel tiene la escritura en un relato de infancia? El presente artículo intenta responder esa pregunta a partir de la lectura de tres narrativas de inspiración autobiográfica del Caribe: Chemin d'école [Camino a la escuela] (1994, de Patrick Chamoiseau; Una casa para Mr. Biswas, de V.S. Naipaul (1961 y Le coeur à rire et à pleurer [Un corazón que ríe y llora] (1999, de Maryse Condé. En todas esas obras observamos los momentos en que la escritura se torna un problema para los personajes-niños y relacionamos esos episodios con la imagen de la cicatriz. Hacia el final, esbozamos una relación posible entre esa imagen y el concepto de glocalización, de Zygmunt Bauman.

  18. Biomass burning and fossil fuel signatures in the upper troposphere observed during a CARIBIC flight from Namibia to Germany

    Science.gov (United States)

    Mühle, J.; Brenninkmeijer, C. A. M.; Rhee, T. S.; Slemr, F.; Oram, D. E.; Penkett, S. A.; Zahn, A.

    2002-10-01

    During a CARIBIC flight from Namibia to Germany in July 2000, air influenced by recent convective injection of biomass burning emissions was intersected in the vicinity of the ITCZ at an altitude of 10 km. The observed CO enhancement ratios for non-methane hydrocarbons (NMHCs) and methyl halides are consistent with those reported for fresh biomass burning plumes. Air masses affected by transcontinental transport of natural gas emissions, most probably from the Gulf of Mexico, were encountered over the Mediterranean Sea. These are one of the few observations of deep convection of biomass burning emissions to the upper troposphere and of long range transport of natural gas emissions reported so far. The observations demonstrate the importance of deep convection for the chemistry of the upper troposphere and the potential of commercial aircraft for atmospheric research.

  19. The stable isotopic composition of molecular hydrogen in the tropopause region probed by the CARIBIC aircraft

    Directory of Open Access Journals (Sweden)

    A. M. Batenburg

    2012-05-01

    Full Text Available More than 450 air samples that were collected in the upper troposphere – lower stratosphere (UTLS region by the CARIBIC aircraft (Civil Aircraft for the Regular Investigation of the atmosphere Based on an Instrument Container have been analyzed for molecular hydrogen (H2 mixing ratios (χ(H2 and H2 isotopic composition (deuterium content, δD.

    More than 120 of the analyzed samples contained air from the lowermost stratosphere (LMS. These show that χ(H2 does not vary appreciably with O3-derived height above the thermal tropopause (TP, whereas δD does increase with height. The isotope enrichment is caused by H2 production and destruction processes that enrich the stratospheric H2 reservoir in deuterium (D; the exact shapes of the profiles are mainly determined by mixing of stratospheric with tropospheric air. Tight negative correlations are found between δD and the mixing ratios of methane (χ(CH4 and nitrous oxide (χ(N2O, as a result of the relatively long lifetimes of these three species. The correlations are described by δD[‰]=−0.35 · χ(CH4[ppb]+768 and δD[‰]=−1.90· χ(N2O[ppb]+745. These correlations are similar to previously published results and likely hold globally for the LMS.

    Samples that were collected from the Indian subcontinent up to 40° N before, during and after the summer monsoon season show no significant seasonal change in χ(H2, but δD is up to 12.3‰ lower in the July, August and September monsoon samples. This δD decrease is correlated with the χ(CH4 increase in these samples. The significant correlation with χ(CH4 and the absence of a perceptible χ(H2 increase that accompanies the δD decrease indicates that microbial production of

  20. The stable isotopic composition of molecular hydrogen in the tropopause region probed by the CARIBIC aircraft

    Directory of Open Access Journals (Sweden)

    A. M. Batenburg

    2012-01-01

    Full Text Available More than 450 air samples that were collected in the upper troposphere – lower stratosphere (UTLS region around the tropopause (TP by the CARIBIC aircraft (Civil Aircraft for the Regular Investigation of the Atmosphere Based on an Instrument Container have been analyzed for molecular hydrogen (H2 mixing ratios (m(H2 and H2 isotopic composition (deuterium content, δD.

    More than 120 of the analysed samples consisted of air from the lowermost stratosphere (LMS. These show that m(H2 does not vary appreciably with O3-derived height above the thermal TP, whereas δD does increase with height. The isotope enrichment is caused by competing H2 production and destruction processes that enrich the stratospheric H2 reservoir in deuterium (D; the exact shapes of the profiles are mainly determined by mixing of stratospheric with tropospheric air. Tight negative correlations are found between δD and the mixing ratios of methane (CH4 and nitrous oxide (N2O, as a result of the relatively long lifetimes of these three species. The correlations are described by δ D [‰]=-0.35 · m(CH4[ppb]+768 and δD [‰]=-1.90 · m(N2O[ppb]+745. These correlations are similar to previously published results and likely hold globally.

    Samples that were collected from the Indian subcontinent up to 40° N before, during and after the summer monsoon season show no significant seasonal change in m(H2, but δD is up to 15‰ lower in the July, August and September monsoon samples. This δD lowering is correlated with m(CH4 increase. The significant correlation with m(CH4 and the absence of a perceptible m(H2 increase that accompanies the δD lowering indicates that microbial production

  1. IDENTIFICACIÓN MOLECULAR DE POBLACIONES BACTERIANAS ASOCIADAS AL CARACOL PALA (Strombus gigas DEL CARIBE COLOMBIANO

    Directory of Open Access Journals (Sweden)

    ROMERO MAGALLY

    2009-08-01

    Full Text Available RESUMEN

    El caracol Pala, Strombus gigas (Strombidae, es de gran importancia ecológica y socioeconómica en el área caribeña colombiana. Sin embargo, es una especie catalogada como “vulnerable” y existe muy poca información referente a las especies bacterianas asociadas al caracol que puedan ser importantes para el desarrollo, manejo productivo y de seguridad acuícola de estos gastrópodos. En este trabajo, nosotros empleamos un estudio microbiológico y molecular de la región intergénica entre los genes 16S y 23S rDNA, análisis del gen rDNA 16S y secuenciación, para analizar las bacterias asociadas al caracol Pala (S. gigas. La composición de bacterias cultivables asociadas fue evaluada por su capacidad para crecer en agar marino y en medios de cultivos selectivos. De un total de 28 muestras analizadas encontramos que el número de bacterias cultivadas en condiciones aerobias fue de alrededor 106 ufc mL-1 donde las bacterias pertenecientes a la familia Vibrionacea fueron las más abundantes, cerca de >105 ufc mL-1 . El análisis molecular de la región intergénica entre los genes 16S y 23S rDNA de las diferentes muestras, reveló una gran complejidad bacteriana asociada a S. gigas. Las secuencias de los amplificados del gen rDNA 16S identificó Pseudoalteromonas sp., Halomonas sp., Psycrobacter sp., Cobetia sp., Pseudomonas sp. y Vibrios sp. Nuestros resultados podrían sugerir un rol importante de estas bacterias como componentes de la comunidad asociada al S. gigas. Esta información puede complementar los estudios que se están implementando en los procesos para la conservación y repoblamiento de las poblaciones de S. gigas en Colombia.

    Palabras clave: Strombus gigas, Caracol pala, Bacteria, Región intergénica 16S-23S, rDNA 16S.

    ABSTRACT

    The Queen Conch, Strombus gigas (Strombidae, is a species of great ecological and socioeconomic importance in the Caribbean area of Colombia

  2. Ketofol: ensayo clínico prospectivo aleatorizado en el Hospital Universitario del Caribe

    Directory of Open Access Journals (Sweden)

    Llamas William

    2011-09-01

    Full Text Available INTRODUCCIÓN: el ketofol es una combinación de dos anestésicos endovenosos: ketamina y propofol. Ambos son excelentesmedicamentos para inducir un estado de inconsciencia que provee las condiciones que el cirujano necesita para realizarprocedimientos quirúrgicos cortos, mínimamente invasivos. La ventaja de esta combinación es la potenciación de sus efectosanestésicos y la paliación mutua de sus efectos adversos; la hipotensión y depresión respiratoria inducidos por el propofol soncontrarrestados por la ketamina, así como los sueños vividos y reacciones de emergencia de la ketamina disminuyen dramáticamentecon propofol.HIPÓTESIS: en razón a que trabajos previos han mostrado que la mezcla ketamina/propofol en una mezcla 1:1(1 miligramo de ketaminapor cada miligramo de propofol es eficaz para proveer anestesia pero con efectos adversos tales como agitación, náuseas, reaccionesde emergencia, etc., creemos que la mezcla 1:2 (1 miligramo de ketamina por cada 2 miligramos de propofol proveerá igual estabilidadde las variables fisiológicas básicas durante la cirugía, con menor incidencia de eventos adversos (las dosis a suministrar están dentrodel rango de dosis considerados como seguros individualmente.METODOLOGÍA: estudio prospectivo aleatorizado a realizarse en el Hospital Universitario del Caribe, con pacientes entre 18 y 50 años,hombres y mujeres, a quienes se les vaya a someter a uno de los siguientes procedimientos: reducción de luxaciones; reducción defracturas; lavados desbridamientos de úlceras, pies diabéticos, y drenaje de abscesos; retiro de material de osteosíntesis;toracostomias; legrados uterinos; sutura de tejidos blandos; cuidados de quemaduras; herniorrafia umbilical; circuncisión y otrosprocedimientos de no más de una hora de duración. Los pacientes se asignarán aleatoriamente a dos grupos: 1. Ketamina/propofol enuna mezcla 1:1 (1 miligramo de ketamina por cada miligramo de propofol, y 2. Ketamina

  3. Investigation on Effect of Forestation by Mixing Pinus massoniana with Schima superba

    Institute of Scientific and Technical Information of China (English)

    HUANGWenchao; HUANGLili

    2004-01-01

    Since forestation of pure forest of Pinus massoniana is liable to suffer from pest calamity, soil erosion, decrease of soil fertility, and difficulty in wood production in the hilly areas of southern China, we conducted an investigation on the three types of forests in Gao'an County of Jiangxi Province, namely, the pure forest of Pinus massoniana, the pure forest of Schima superba, and the mixed forest consisting of the two species, setting up standard stand, measuring and studying the growing stock, biomass, leaf area, roots,soil, vegetation, pests, litters, soil erosion, microclimate, etc., with the following results. ① The average height, diameter at chest height, and volume of the mixed forest are higher than those of the pure forest of Pinus massoniana by 30.9%, 31.7% and 10.6%, respectively. ② The biomass of the mixed forest is 2.24 times as much as that of the pure forest of Pinus massoniana. ③ The litters of the mixed forest is 3.37 times and 1.96 times as much as the litters of the pure forest of Pinus massoniana and the pure forest of Schima superba respectively. ③ The occurrence of pest calamity per tree is lower and the conditions of soil erosion and microclimate are better than those of the pure forest ofPinus massoniana. ④ The mixed forest of the two species is an excellent mixed type of needle-leaf and deciduous forest worth being popularized in China's subtropical areas, especially in the low hilly areas. It is recommended in plantation that the mixed patterns be between trees, lines, small blocks, or scattered-dots, the ratio of mixture of Pinus massoniana and Schima superba be 5 to 1, or 3 to 1, and the initial space between trees be 1.2, 1.5, or 2.0 m while the initial density be 6 944 to 4 440 trees per square hectare.

  4. La comunidad de copépodos en las Islas de Providencia y Santa Catalina (Caribe colombiano) durante el período lluvioso (Octubre) 2005

    OpenAIRE

    Martínez-Barragan, M.P.; Franco-Herrera, A.; Medina-Calderon, J.; Santos-Martínez, A.

    2009-01-01

    Con el fin de contribuir al conocimiento de la comunidad zooplanctónica, en particular de la sublcase Copepoda en las islas de Providencia y Santa Catalia (Caribe colombiano), se analizaron 47 estaciones en el mes de octubre de 2005 (época lluviosa). Se encontraron en total 42 especies pertenecientes a los órdenes Calanoida, Poecilostomatoida, Cyclopoida, Harpacticoida y Siphonostomatoida, de las cuales Clausocalanus arcuicornis, C. furactus, Calocalanus pavo, C. contractus, Pontella securife...

  5. El acaparamiento de tierras en América Latina y el Caribe visto desde una perspectiva internacional más amplia

    NARCIS (Netherlands)

    S.M. Borras jr (Saturnino); J.C. Franco (Jennifer); C. Kay (Cristóbal); M. Spoor (Monique)

    2012-01-01

    markdownabstractEste volumen continúa la discusión surgida de los antecedentes recogidos en la investigación presentada en el libro “Dinámicas del mercado de la tierra en América Latina y el Caribe: concentración y extranjerización”, publicado por la Oficina Regional de la FAO en junio de 2012. Tant

  6. Chemical and cellulose crystallite changes in Pinus radiata during torrefaction

    International Nuclear Information System (INIS)

    The impact on the chemical composition and changes to the cellulose crystallites in Pinus radiata wood chips under light (ca. 230 °C), mild (ca. 260 °C), and severe (290+ °C) torrefaction temperatures at a range of times was examined by solid state 13C CP-MAS and Dipolar Dephased NMR spectroscopy, TGA, and synchrotron based X-ray diffraction. Results indicated the decomposition of hemicelluloses into furfurals at the lowest temperature with little modification to the lignin or cellulose. De-polymerisation of lignin and cellulose was observed as torrefaction severity increased. The increased hydrophobicity under light and mild torrefaction severity was attributed to a combination of thermo-chemical modifications to hemicelluloses and lignin, along with cellulose crystal lattice changes. The observed decrease in hydrophobicity under severe torrefaction conditions was attributed to the degradation of cellulose crystallites. -- Highlights: •It was shown that the torrefaction process has an optimum temperature – time regime with respect to increased hydrophobicity. •Changes to the proportion of ether linkages in lignin after torrefaction were determined by solid state NMR. •Changes to cellulose crystallites after torrefaction were determined by X-ray diffraction. •We relate the hydrophobicity of torrefied wood to changes in wood polymer interactions

  7. Urbanization in China drives soil acidification of Pinus massoniana forests

    Science.gov (United States)

    Huang, Juan; Zhang, Wei; Mo, Jiangming; Wang, Shizhong; Liu, Juxiu; Chen, Hao

    2015-09-01

    Soil acidification instead of alkalization has become a new environmental issue caused by urbanization. However, it remains unclear the characters and main contributors of this acidification. We investigated the effects of an urbanization gradient on soil acidity of Pinus massoniana forests in Pearl River Delta, South China. The soil pH of pine forests at 20-cm depth had significantly positive linear correlations with the distance from the urban core of Guangzhou. Soil pH reduced by 0.44 unit at the 0-10 cm layer in urbanized areas compared to that in non-urbanized areas. Nitrogen deposition, mean annual temperature and mean annual precipitation were key factors influencing soil acidification based on a principal component analysis. Nitrogen deposition showed significant linear relationships with soil pH at the 0-10 cm (for ammonium N (-N), P < 0.05 for nitrate N (-N), P < 0.01) and 10-20 cm (for -N, P < 0.05) layers. However, there was no significant loss of exchangeable non-acidic cations along the urbanization gradient, instead their levels were higher in urban than in urban/suburban area at the 0-10 cm layer. Our results suggested N deposition particularly under the climate of high temperature and rainfall, greatly contributed to a significant soil acidification occurred in the urbanized environment.

  8. Pharmaceutical and nutraceutical effects of Pinus pinaster bark extract.

    Science.gov (United States)

    Iravani, S; Zolfaghari, B

    2011-01-01

    In everyday life, our body generates free radicals and other reactive oxygen species which are derived either from the endogenous metabolic processes (within the body) or from external sources. Many clinical and pharmacological studies suggest that natural antioxidants can prevent oxidative damage. Among the natural antioxidant products, Pycnogenol(®) (French Pinus pinaster bark extract) has been received considerable attention because of its strong free radical-scavenging activity against reactive oxygen and nitrogen species. P. pinaster bark extract (PBE) contains polyphenolic compounds (these compounds consist of catechin, taxifolin, procyanidins of various chain lengths formed by catechin and epicatechin units, and phenolic acids) capable of producing diverse potentially protective effects against chronic and degenerative diseases. This herbal medication has been reported to have cardiovascular benefits, such as vasorelaxant activity, angiotensin-converting enzyme inhibiting activity, and the ability to enhance the microcirculation by increasing capillary permeability. Moreover, effects on the immune system and modulation of nitrogen monoxide metabolism have been reported. This article provides a brief overview of clinical studies describing the beneficial and health-promoting effects of PBE. PMID:22049273

  9. Effect of trace elements on growth of Pinus tabulaeformis seedling

    Institute of Scientific and Technical Information of China (English)

    2002-01-01

    The stimulative effect of trace elements on seed germination and seedling growth of Pinus tabulaeformis was tested. The experiments were carried out on seed soak and topdressing with different trace elements and varied concentrat ions at the nursery of Gardens Research Institute, Harbin, in 2000-2001. The experimental results showed that soaking seed with 1% and 0.2% concentrations of Mn element produced best result for seed germination, and the germination rate was increased by 9%~19% for the seeds treated with 1% concentration and 12%~14% for the seeds treated with 0.2% concentration compared with the control group. The seeds treated with boron element had lowest germination rate. For trace element topdressing, Mn and Mo elements presented good result for seedling growth and th e treatment with low concentration was even better. The height or chlorophyll co ntent of the seedlings with spray of low-concentration Mn and Mo element was muc h higher than that of untreated ones. In the contrast to the treating method of seed soak, topdressing (application of spraying on foliage) had evident effect o n seedling growth.

  10. Nitrogen metabolism in Lignifying Pinus taeda cell cultures

    Science.gov (United States)

    van Heerden, P. S.; Towers, G. H.; Lewis, N. G.

    1996-01-01

    The primary metabolic fate of phyenylalanine, following its deamination in plants, is conscription of its carbon skeleton for lignin, suberin, flavonoid, and related metabolite formation. Since this accounts for approximately 30-40% of all organic carbon, an effective means of recycling the liberated ammonium ion must be operative. In order to establish how this occurs, the uptake and metabolism of various 15N-labeled precursors (15N-Phe, 15NH4Cl, 15N-Gln, and 15N-Glu) in lignifying Pinus taeda cell cultures was investigated, using a combination of high performance liquid chromatography, 15N NMR, and gas chromatograph-mass spectrometry analyses. It was found that the ammonium ion released during active phenylpropanoid metabolism was not made available for general amino acid/protein synthesis. Rather it was rapidly recycled back to regenerate phenylalanine, thereby providing an effective means of maintaining active phenylpropanoid metabolism with no additional nitrogen requirement. These results strongly suggest that, in lignifying cells, ammonium ion reassimilation is tightly compartmentalized.

  11. Hydraulic adjustments underlying drought resistance of Pinus halepensis.

    Science.gov (United States)

    Klein, Tamir; Cohen, Shabtai; Yakir, Dan

    2011-06-01

    Drought-induced tree mortality has increased over the last decades in forests around the globe. Our objective was to investigate under controlled conditions the hydraulic adjustments underlying the observed ability of Pinus halepensis to survive seasonal drought under semi-arid conditions. One hundred 18-month saplings were exposed in the greenhouse to 10 different drought treatments, simulating combinations of intensities (fraction of water supply relative to control) and durations (period with no water supply) for 30 weeks. Stomata closed at a leaf water potential (Ψ(l)) of -2.8 MPa, suggesting isohydric stomatal regulation. In trees under extreme drought treatments, stomatal closure reduced CO(2) uptake to -1 µmol m(-2) s(-1), indicating the development of carbon starvation. A narrow hydraulic safety margin of 0.3 MPa (from stomatal closure to 50% loss of hydraulic conductivity) was observed, indicating a strategy of maximization of CO2 uptake in trees otherwise adapted to water stress. A differential effect of drought intensity and duration was observed, and was explained by a strong dependence of the water stress effect on the ratio of transpiration to evapotranspiration T/ET and the larger partitioning to transpiration associated with larger irrigation doses. Under intense or prolonged drought, the root system became the main target for biomass accumulation, taking up to 100% of the added biomass, while the stem tissue biomass decreased, associated with up to 60% reduction in xylem volume. PMID:21712236

  12. Genetic transformation of Pinus taeda by particle bombardment

    Institute of Scientific and Technical Information of China (English)

    2002-01-01

    A protocol is presented for genetically engineering loblolly pine (Pinus taeda L.) using particle bombardment. This protocol enabled the routine transformation of loblolly pine plants that were previously difficult to transform. Mature zygotic embryos were used to be bombarded and to generate organogenic callus and transgenic regenerated plants. Plasmid pB48.215 DNA contained a synthetic Bacillus thuringiensis (B.t.) cryIAc coding sequence flanked by the double cauliflower mosaic virus (CaMV) 35S promoter and nopaline synthase (Nos) terminator sequences, and the selectable marker gene, neomycin phosphotransferase II (nptII) controlled by the promoter of the nopaline synthase gene was introduced into loblolly pine tissues by particle bombardment. The transformed tissues were proliferated and selected by kanamycin resistance conferred by the introduced NPTII gene. Shoot regeneration was induced from the kanamycin-resistant callus, and transgenic plantlets were then produced. The presence of the introduced genes in the transgenic loblolly pine plants was confirmed by polymerase chain reactions (PCR) analysis, by Southern blot analysis, and insect feeding assays. The recovered transgenic plants were acclimatized and then established in soil.

  13. Dynamics of monoterpene emissions in Pinus sylvestris during early spring

    Energy Technology Data Exchange (ETDEWEB)

    Baeck, J.; Hari, P.; Juurola, E. [Department of Forest Ecology, University of Helsinki (Finland); Hakola, H. [Finnish Meteorological Institute, Research and Development, Helsinki (Finland); Kulmala, M. [Department of Physical Sciences, University of Helsinki (Finland)

    2005-07-01

    The seasonal dynamics of biogenic volatile organic compound (BVOC) emissions, which can be related to the formation and growth of secondary organic aerosols, represent an important but at the present poorly understood linkage between vegetation activity and climate. Although a close relationship between photosynthesis and terpenoid emissions has been proposed, high monoterpene emission rates for Scots pine shoots (Pinus sylvestris) are frequently recorded during spring, in times when photosynthetic activity is strongly inhibited due to inherent seasonal restrictions. We suggest that terpenoid emissions are related to either photosynthesis or photorespiration for precursors for terpenoid biosynthesis. We developed two dynamic models describing temporal fluctuations in Scots pine monoterpene emissions, calculating the emissions by using CO{sub 2} exchange and ambient climate data. The models accurately predicted the measured monoterpene flux, and especially in March-April, during the time when photosynthesis was negligible and ambient temperatures were between -5 and +15 C, a good agreement was found with measured emissions and the model involving photorespiration. (orig.)

  14. Las otras caras del paraíso: veinte años en la historiografía del turismo en el Caribe, 1993 - 2013

    Directory of Open Access Journals (Sweden)

    Orlando Deavila Pertuz

    2014-01-01

    Full Text Available Este ensayo historiográfico analiza la evolución en el estudio del desarrollo histórico del turismo en el Caribe, cuáles han sido sus debates, perspectivas temáticas, aproximaciones metodológicas, y bases teóricas en los últimos veinte años. El articulo su giere que han sido cinco los temas que han marcado esta trayectoria historiográfica: el estudio del turismo desde sus implicaciones económicas, políticas y sociales (y desde la comparación con el sistema de plantación, desde la perspectiva de género y la sexualidad (y en particular desde la dominación del cuerpo de la mujer caribeña afrodescendiente, desde las relaciones socio - raciales derivadas del encuentro turístico, desde su dimensión simbólica y/o imaginaria, y desde la relación histórica entre el tu rismo y los distintos poderes imperiales que se han establecido en la región. A pesar de la rica trayectoria en el estudio del tema, sus logros no se han extendido al Caribe continental.

  15. producción bibliométrica y redes de cooperación en la revista psicología desde el caribe

    Directory of Open Access Journals (Sweden)

    José Hernando Ávila-Toscano

    2016-01-01

    Full Text Available En este artículo se presentan resultados de un estudio cuyo objetivo se centró en el análisis de los indicadores bibliométricos y las redes de colaboración en la revista de psicología más representativa del Caribe colombiano (Psicología desde el Caribe durante el período 2009- 2013. Tras el análisis de 12 números, los resultados demuestran la importancia otorgada al trabajo colaborativo, que se evidencia en un elevado porcentaje de textos escritos por varios autores (83.2 %, que particularmente proceden de instituciones colombianas, que prefieren el trabajo conjunto con los de España, México y Estados Unidos. La revista también so- bresale como un órgano de la preferencia para una red importante de autores de Brasil. En los artículos publicados destacan las investigaciones de tipo aplicado y de temáticas clínicas y sociales, como las de mayor preferencia por parte de los articulistas. Psicología desde el Caribe se perfila como un órgano de difusión esencialmente en español, que parece gozar del crédito y la confianza de autores de todo el continente Americano y España.

  16. Culturas migratorias en el Caribe colombiano: El caso de los isleños raizales de las islas de Old Providence y Santa Catalina

    Directory of Open Access Journals (Sweden)

    Ana Isabel Márquez Pérez

    2013-01-01

    Full Text Available Las migraciones caribeñas han sido ampliamente documentadas, especialmente desde visiones económicas y demográficas que enfatizan los aspectos negativos que estas causan en individuos y sociedades. Sin embargo, desde las ciencias humanas se ha difundido el concepto de culturas migratorias para analizarlas . El eje central es que, más allá de un fenómeno de tipo económico, ligado a superpoblación y desempleo , la movilidad caribeña puede entenderse como una tradición cultural que se ha convertido en un modo de vida legitimado por generaciones de migrantes, permitiendo la viabilidad de estas sociedades. Este concepto supone la movilidad constante a manera de migraciones temporales utilizadas como estrategias económicas básicas, así como mecanismos socioculturales que facilitan y perpetúan esta práctica. Este seria el caso de los habitantes de Providencia y Santa Catalina en el territorio de habla inglesa en el Caribe colombiano, quienes poseen una larga historia de migraciones que continúan hasta hoy y que constituyen una forma de vida. Este documento resulta de investigaciones realizadas tanto en las islas como con migrantes en Bogotá, entre 2004 y 2011, en las cuales se abordaron diversos temas, incluyendo el papel de las migraciones en la vida de estos isleños, las memorias y las percepciones sobre las mismas.

  17. Paleoclimatic implications of glacial and postglacial refugia for Pinus pumila in western Beringia

    Energy Technology Data Exchange (ETDEWEB)

    Anderson, P M; Lozhkin, A V; Solomatkina, T B; Brown, T A

    2010-02-05

    Palynological results from Julietta Lake currently provide the most direct evidence to support the existence of a glacial refugium for Pinus pumila in mountains of southwestern Beringia. Both percentages and accumulation rates indicate the evergreen shrub survived until at least {approx}19,000 14C yr B.P. in the Upper Kolyma region. Percentage data suggest numbers dwindled into the late glaciation, whereas pollen accumulation rates point towards a more rapid demise shortly after {approx}19,000 14C yr B.P. Pinus pumila did not re-establish in any great numbers until {approx}8100 14C yr B.P., despite the local presence {approx}9800 14C yr B.P. of Larix dahurica, which shares similar summer temperature requirements. The postglacial thermal maximum (in Beringia {approx}11,000-9000 14C yr B.P.) provided Pinus pumila shrubs with equally harsh albeit different conditions for survival than those present during the LGM. Regional records indicate that in this time of maximum warmth Pinus pumila likely sheltered in a second, lower-elevation refugium. Paleoclimatic models and modern ecology suggest that shifts in the nature of seasonal transitions and not only seasonal extremes have played important roles in the history of Pinus pumila over the last {approx}21,000 14C yr B.P.

  18. Condicionantes del turismo sustentable en el caribe mexicano Conditions of sustainable tourism on the Caribbean coast of Mexico Les conditions du tourisme soutenable sur la côté caribéenne du Mexique.

    Directory of Open Access Journals (Sweden)

    Rosalía Gómez Uzeta

    2011-09-01

    Full Text Available La concurrence internationale sur le marché touristique a des effets négative sur le comportement des flux touristiques américains sur les rivages caribéens du Mexique. La massification des flux a mis en évidence les limites du modèle traditionnel basé sur l'offre « soleil et plage  » commune à l’ensemble de l’espace carïbéen. Pour cette raison, il est nécessaire de repenser de nouvelles façons de soutenir le développement du tourisme, de la décentralisation des fonctions politiques et administratives des trois paliers de gouvernement, et de chercher à renforcer les synergies régionales pour renforcer les possibilités de diversification du développement autour de nouvelles attractions et offres provenant des marchés locaux.Cette stratégie permettra de promouvoir la durabilité de l'économie régionale et d'État et de consolider un projet de développement viable à long terme.The competition on the international tourism market has negative effects on the behavior of American’ tourist flows on the Caribbean coast of Mexico. The mass flows has highlighted the limitations of traditional model based on the offer "sun and beach" common throughout the Caribbean area. For this reason, we need to rethink new ways to support development tourism, the decentralization of political and administrative functions of the three levels of government, and seek to strengthen regional synergies to enhance diversification opportunities around the development of new attractions and offers from local markets.This strategy will promote the sustainability of the regional economy and state and consolidate a sustainable development project in the long term.Existen condiciones de competencia internacional que han afectado negativamente el comportamiento del flujo turístico norteamericano al Caribe Mexicano, ello ha puesto en evidencia la vulnerabilidad del modelo tradicional basado en la oferta de “sol y playa”, que se ha agrava en la

  19. Poder y ordenamiento espacial en la Costa Caribe colombiana: Patrones de asentamiento en el Partido de Cartagena (Tierradentro- Provincia de Cartagena de Indias, siglos XVI – XVII

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    Camilo Díaz Pardo

    2007-01-01

    Full Text Available En la literatura histórica colombiana y caribeña se ha dado un fuerte acento en el papel que jugaron las ciudades y las regiones que emergieron de ellas en ola formación la moderna cultura caribeña. En la arqueología el énfasis se ha limitado a analizar procesos prehispánicos adaptativos a condiciones cambiantes del medio ambiente dejando de manera tacita fuera de foco la discusión de las consecuencias sociales y culturales de la conquista y la colonia y su impacto en el tejido social que surgiría a finales del siglo XVI. Estas delimitaciones disciplinarias se han convertido en un obstáculo para el conocimiento e interpretación de las dinámicas que siguieron al impulso inicial de la colonización del litoral caribeño y la bien conocida fundación de los centros militares y administrativos. Consecuentemente los historiadores han ignorado en gran parte el papel de las poblaciones aborígenes en la formación de los asentamientos al interior de la llanura costera a pesar que es un hecho bien conocido que no desaparecieron completamente después del siglo XVI. A pesar de que han existido intentos de sintetizar y complementar la información histórica con datos arqueológicos especialmente en los últimos diez años no hemos asistido a un evaluación del campo que consideramos de la mayor importancia para entender la estrategias a traves de las cuales las comunidades aborígenes y algo mas tarde las comunidades de composición mixta africano-indígena y mestizas establecieron exitosamente una serie de asentamientos fuera del sistema colonial reinante. El análisis de los patrones de asentamiento se ha restringido a estudios arqueológicos pero su potencial se extiende mucho mas alla de esta disciplina. La colonia en el siglo XVIII registra un gran número de asentamientos en las planicies caribeñas para los cuales tenemos muy poca información precedente, se hace necesario entonces entender el sistema de asentamientos que exitosamente

  20. Chronic effects of Pinus radiata and Eucalyptus globulus kraft mill effluents and phytosterols on Daphnia magna.

    Science.gov (United States)

    López, D; Chamorro, S; Silva, J; Bay-Schmith, E; Vidal, G

    2011-12-01

    Two kraft pulp mill effluents were compared in terms of their chronic toxicity to Daphnia magna. One resulted from pulping Pinus radiata and the other came from a parallel processing of Pinus radiata and Eucalyptus globulus (mixed kraft pulp mill effluent). The concentration of phytosterols found in the mixed kraft pulp mill effluent was higher than in the effluent from Pinus radiata, with values of 0.1082 and 0.02 μg/L, respectively. The phytosterols per se are responsible for 12.9% and 8.1% of the deviation from the natural shape, while the kraft pulp mill effluents account for 25.6%-27.8% of shape deviation. The role of β-sitosterol and stigmasterol is discussed in relation to endocrine disruption. PMID:21979137

  1. Microsporogenesis and meiotic behavior in nine species of the genus Pinus

    Institute of Scientific and Technical Information of China (English)

    Hui-Sheng DENG; Da-Ming ZHANG; De-Yuan HONG; Cheng-Xin FU

    2009-01-01

    The meiotic behavior of 10 taxa (nine species and one variety) of the genus Pinus was investigated using pollen mother cells (PMCs) to reveal the differentiation among karyotypes. Chromosome spreads were prepared by conventional squashing. The meiotic index and the average configuration were higher, whereas the frequency of aberrance (chromosomal bridges, fragments, or micronuclei) was lower, in all l0 taxa compared with other gymnosperms. The meiotic index, average configuration, and frequency of irregularity were found to be uniform among the species. It was shown that the genomes of the Pinus species investigated were highly stable, confirming results of previous mitotic analyses in this genus. However, slight differentiation of homologous chromosomes among genomes was revealed by analysis of meiotic configurations in Pinus nigra var. poiretiana. Quadrivalents were observed in 9.31% of PMCs in this species. This is the first time that quadrivalents have been observed in gynmosperms.

  2. 黄山松的分类学研究%STUDY ON TAXONOMY OF PINUS HWANGSHANENSIS

    Institute of Scientific and Technical Information of China (English)

    邹惠渝; 黎志; 罗世家; 易咏梅; 王静茹

    2003-01-01

    通过形态解剖学到分子生物学的对比实验.研究结果表明黄山松(Pinus hwangshanensis Hsia)和台湾松(Pinus taiwanensis Hayate)两者在形态上虽然有相似之处;但染色体特征不同,随机扩增DNA多态性分析(RAPD分析)显示两者的遗传距离很远,甚至大于黄山松和马尾松之间的遗传距离.结论是台湾松和黄山松决非同一种系,应恢复黄山松(Pinus hwangshanensis Hsia)的合法性.

  3. Chemical properties of tannic extracts from bark of Pinus oocarpa and their use as adhesive

    Directory of Open Access Journals (Sweden)

    Michel Cardoso Vieira

    2014-03-01

    Full Text Available This work evaluated the properties of aqueous extracts obtained from the bark of Pinus oocarpa under addition of sodium sulfite and sodium bisulfite and the possibility of employment of tannins from the bark as an adhesive for bonding wood. After evaluation of the chemical properties of tannic extracts it was decided to employ the extraction with distilled water under addition of / 5% sodium sulfite to prepare for the tannin-formaldehyde adhesive. Adhesive phenol formaldehyde and urea-formaldehyde were modified with 10% tannin Pinus oocarpa and the effect of this addition on the quality of the adhesive was evaluated. The addition from the bark of Pinus oocarpa showed that it is possible to use pure tannin as an adhesive because of its good gluing characteristics. The addition of tannic extract to synthetic adhesives contributed to increase viscosity values. Thus the substitution of synthetic adhesives by tannins is possible only up to 10%.

  4. Rapid changes of induced volatile organic compounds in Pinus massoniana

    Institute of Scientific and Technical Information of China (English)

    REN Qin; JIN Youju; HU Yongiian; CHEN Huajun; LI Zhenyu

    2007-01-01

    Using the thermal-desorption cold trap gas chromatography/mass spectrometer(TCT-GC-MS)technique,the composition and relative contents of volatile compounds were analyzed in undamaged(control),insect-damaged(ID)and artificially-damaged(AD)leaves ofPinus massoniana in field at different times and levels of damage.Results showed that although volatile substances were highly released earlier in AD leaves plants,they were significantly less abundant in AD than in ID leaves treatments.Also,the damage level considerably influenced the changes of induced volatile products from leaves.Compared with the control,the emission rate of camphene,β-pinene,phellandrene,caryophyllene and(E)farnesene was high after 1 h in 25%-40% ID-affected leaves,whereas that of tricyclene,myrcene,camphene,β-Pinene,phellandrene and caryophyllene reached its maximum after 24 h in 60%-75% D-affected leaves.In the same manner,some volatile compounds in the AD leaves treatment displayed their peaks just after 1 h,but others after 24 h.The AD and ID leaves at the damage level of 25%-40% did not exhibit an obvious regularity with time;however,in 60%- 75% AD leaves,peaks of volatile substances were attained after 1 or 2 h.Our results also showed that the relative content ofβ-pinene increased and was higher in damaged than control plants,β-pinene plays an important role in inducing the insect resistance of P.massoniana trees.

  5. Modeling the water balance of a small Pinus radiata catchment.

    Science.gov (United States)

    Whitehead, D.; Kelliher, F. M.

    1991-01-01

    An hourly biophysical model was used to calculate the water balance over a period of one year for an 8.7-ha catchment with a closed-canopy, 13-year-old Pinus radiata D. Don forest in the central North Island, New Zealand. Components of the model are transpiration from the dry tree canopy, evaporation from the partially wet tree canopy and stems, evaporation from the understory and soil, and drainage from a single-layer root zone. The model requires input of hourly weather data (net radiation, air and wet bulb temperatures, windspeed, and rainfall), tree stand characteristics (average height, tree number, leaf area index), physical characteristics of the site (root zone depth, relationship between root zone matric potential and volumetric water content, the relationship between the rate of drainage from the root zone and volumetric water content, and the area of open-stream channels). A submodel of the response of stomatal conductance to air saturation deficit and root zone matric potential is also required. Tree transpiration (704 mm year(-1) or 50% of annual rainfall) was a dominant component of the catchment water balance. Estimated evaporation from the wet tree canopy was 203 mm year(-1) (15%). Evaporation from the understory was much less, amounting to 94 mm year(-1) (7%) and an increase in water storage for the 3.5 m root zone depth was estimated to be 53 mm year(-1) (4%). Estimated daily rates of drainage generally agreed well with measurements of streamflow, although estimated annual drainage (349 mm year(-1), 24%) exceeded measured streamflow (234 mm year(-1)). The significance of the results is discussed in relation to closure of the hydrologic balance. PMID:14972854

  6. [Stem respiration of Pinus koraiensis in Changbai Mountains].

    Science.gov (United States)

    Wang, Miao; Ji, Lanzhu; Li, Qiurong; Xiao, Dongmei; Liu, Hailiang

    2005-01-01

    In this paper, soil respiration chamber, a simple and precise method, was used to measure the stem respiration of trees. LI-6400-09 respiration chamber serving as a system is usually used in soil respiration, but we made polyvinyl chloride (PVC) collar and fixed it on the stem surface to measure the stem respiration. From May to October 2003, the stem respiration of Pinus koraiensis, the dominant tree species in Changbai Mountain, was measured in different time and different places using this technique. Meanwhile, the temperatures in the stems and in the forests were measured. The results showed that the stem respiration rate had a remarkably seasonal tendency with a single peak, the maximum was in August and the minimum was in February. The stem respiration rate had an exponential relationship with stem temperature, and the curve exponential regressions for stem respiration rate and temperature factor of trees with big DBH were better than those with small DBH. The stem respiration in different DBH trees was higher in the south stem face than that in the north stem face, and the variance of respiration rate between south and north decreased with a decrease of DBH trees. During the growing season from May to October, the average maintenance respiration accounted for 63.63% in different DBH trees, and the maintenance respiration contribution to total respiratory consumption increased with increasing DBH, which was 66.76, 73.29% and 50.84%, respectively. The stem respiration Q10 values ranged from 2.56-3.32 in different DBH of trees, and the seasonal tendency for stem R, and Rm in different DBH of trees was obtained by using respiration Q10. Therefore, the differences between different parts of stem and different DBH of trees should be considered in estimating the respiration model in ecosystem. PMID:15852948

  7. Stem compression reversibly reduces phloem transport in Pinus sylvestris trees.

    Science.gov (United States)

    Henriksson, Nils; Tarvainen, Lasse; Lim, Hyungwoo; Tor-Ngern, Pantana; Palmroth, Sari; Oren, Ram; Marshall, John; Näsholm, Torgny

    2015-10-01

    Manipulating tree belowground carbon (C) transport enables investigation of the ecological and physiological roles of tree roots and their associated mycorrhizal fungi, as well as a range of other soil organisms and processes. Girdling remains the most reliable method for manipulating this flux and it has been used in numerous studies. However, girdling is destructive and irreversible. Belowground C transport is mediated by phloem tissue, pressurized through the high osmotic potential resulting from its high content of soluble sugars. We speculated that phloem transport may be reversibly blocked through the application of an external pressure on tree stems. Thus, we here introduce a technique based on compression of the phloem, which interrupts belowground flow of assimilates, but allows trees to recover when the external pressure is removed. Metal clamps were wrapped around the stems and tightened to achieve a pressure theoretically sufficient to collapse the phloem tissue, thereby aiming to block transport. The compression's performance was tested in two field experiments: a (13)C canopy labelling study conducted on small Scots pine (Pinus sylvestris L.) trees [2-3 m tall, 3-7 cm diameter at breast height (DBH)] and a larger study involving mature pines (∼15 m tall, 15-25 cm DBH) where stem respiration, phloem and root carbohydrate contents, and soil CO2 efflux were measured. The compression's effectiveness was demonstrated by the successful blockage of (13)C transport. Stem compression doubled stem respiration above treatment, reduced soil CO2 efflux by 34% and reduced phloem sucrose content by 50% compared with control trees. Stem respiration and soil CO2 efflux returned to normal within 3 weeks after pressure release, and (13)C labelling revealed recovery of phloem function the following year. Thus, we show that belowground phloem C transport can be reduced by compression, and we also demonstrate that trees recover after treatment, resuming C

  8. Cytogenetic variability in pinus sylvestris L. populations experiencing anthropogenic influence

    Energy Technology Data Exchange (ETDEWEB)

    Oudalova, A.; Geras' kin, S.; Vasiliev, D.; Dikarev, V. [Russian Institute of Agricultural Radiology and Agroecology, Obninsk (Russian Federation)

    2004-07-01

    Techno-genic pollution has become one of the most significant ecological factors determining biosphere existence and development. An analysis of genetic consequences of the radiation accidents in the South Urals and Chernobyl has shown that mutation and recombination processes are considerably accelerated in plant and animal's populations experiencing techno-genic influence. This implies that there are complicated adaptation processes leading to changes in genetic structure of populations and increasing genetic load. Pinus sylvestris L. populations growing at the territory of the 'radon' Leningrad regional radioactive waste reprocessing enterprise and Sosnovy Bor town were monitored 6 years (1997-2002) by a set of cyto-genetical and morphological tests. Cytogenetic damage levels within intercalary meristem of needle as well as in root meristem of seedlings were found to significantly exceed corresponding controls. A higher radioresistance of the Scots pine seeds analyzed was demonstrated with an acute {gamma}-radiation that also revealed a selection process directed at an enhancement of repair efficiency and resulting in a shift of mean values of radioresistance in populations towards higher values. An enlargement of variance of studied cytogenetic parameters was found in the populations experiencing techno-genic influence. This indicates, with an account of phenomenon of the enhanced radioresistance, that there are processes of cyto-genetical adaptation in the investigated regions. An analysis of the structure of ecological-genetical variability was carried out with the purpose of separating two components in the inter-population variability - the first is engaged to the genetically determined variability of biological characteristics intrinsic for this species, and the second is responsible for the variability originating from anthropogenic contamination of the natural habitat. Changes of these two types of variability were studied in dependence on

  9. Diameter growth prediction for individual Pinus occidentalis Sw. trees

    Directory of Open Access Journals (Sweden)

    Bueno-López S

    2013-05-01

    Full Text Available Predictive equations calibrated with remeasurement data from 25 permanent plots having individually identified trees were used to project stem diameter of Pinus occidentalis Sw. in Dominican Republic. The general form of the models used to fit the growth and yield functions included fixed effect covariates related to three subsets of explanatory variables: initial tree size, stand attributes, and competition indexes. The subsets were incrementally added in a stepwise fashion for each of the three response variables and the intercept of the model was allowed to vary randomly between plots. The models evaluated included a yield function that predicted future diameter at year t (dt, a periodic annual increment model using five-year diameter increment (id5 and its natural log transformation [ln(id5+0.01]. For trees that were not remeasured exactly 5 years after the first measurement, id5 was computed by averaging the mean annual increment nearest the 5 year point and multiplying by five. Each approach was evaluated using an independent validation data set based on seven goodness-of-fit statistics, graphical display of residuals and the variance components of each model combination. LMM, including fixed and random parameters, provided a better fit among the models tested. For estimating future diameter, accuracy of predictions is within one centimeter for a five-year projection interval, and bias is negligible. All the models had moderately improved fit statistics when random effects were included in the evaluation. The degree of improvement behaved in a similar manner for most fit statistics, with differences in the range of values for MSE, RMSE and RMSE% of 0.53, 0.23 and 1.05, respectively. The absolute difference between the extreme values for Bias and relative Bias (% in all the models was 0.20 and 0.92. The differences in values for MAD were only 0.15 and R2 values were practically equivalent.

  10. Biomass production of young lodgepole pine (Pinus contorta var. latifolia stands in Latvia

    Directory of Open Access Journals (Sweden)

    Jansons A

    2013-01-01

    Full Text Available Biomass as a source of renewable energy is gaining an increasing importance in the context of emission targets set by the European Union. Large areas of abandoned agricultural land with different soils are potentially available for establishment of biomass plantations in the Baltic states. Considering soil and climatic requirements as well as traits characteristic for lodgepole pine (Pinus contorta Dougl. var. latifolia Engelm and the scarcity of published knowledge, we assessed the above-ground biomass of Pinus contorta in comparison to that of native Scots pine (Pinus sylvestris L. and factors affecting biomass production. Data were collected in 3 experimental trials, located in two sites in central part of Latvia: Zvirgzde and Kuldiga (56°41’ N, 24°28’ E and 57°03’ N, 21°57’ E, respectively. Trials were established with density 5000 tree ha-1, using seed material from Canada (50°08’-60°15’ N, 116°25’-132°50’ W and two Pinus contorta stands with unknown origin growing in Latvia. Results reveal that absolute dry aboveground biomass of Pinus contorta reaches 114 ± 6.4 t ha-1 at age 16 on a fertile former arable land, 48 ± 3.6 and 94 ± 9.4 t ha-1 at age 22 and 25, respectively, on a sandy forest land (Vacciniosa forest type. The biomass is significantly (p < 0.01 and considerably (more than two-fold higher than that of the native Pinus sylvestris and the productivity is similar (in fertile soils or higher (on poor soils than reported for other species in energy-wood plantations. Provenance was a significant factor affecting the above-ground biomass, and the ranking of provenances did not change significantly between different soil conditions. It provides opportunities for further improvement of productivity using selection.

  11. Vergleichende Studien des Pinus-Krummholzes in den japanischen und europäischen Alpen

    OpenAIRE

    Wilmanns, Otti; Bogenrieder, Arno; Nakamura, Yukito

    1985-01-01

    Die Formation des von Nadelhölzern beherrschten Krummholzes ist sowohl in den japanischen als auch in den europäischen Alpen landschaftsprägend entwickelt; die beiden Ausbildungen werden hier vergleichend-autökologisch und vergleichend-pflanzensoziologisch betrachtet. Schlüsselart des (Nadel-) Krummholzes ist in Japan Pinus pumila (Pall.) Regel, in Europa Pinus mugo Turra. P. pumila unterscheidet sich bei an sich gleichem Wuchs durch die Fähigkeit, an älteren Ästen Nebenwurzeln und damit Poly...

  12. ASSOCIATION BETWEEN SMOKING AND ALLERGIC RHINITIS IN OTOLARYNGOLOGIC PATIENTS OF THE HOSPITAL UNIVERSITARIO DEL CARIBE. CARTAGENA. COLOMBIA. (IN SPANISH

    Directory of Open Access Journals (Sweden)

    Morales-Valdés Lady Johana

    2014-06-01

    Full Text Available Introduction: the allergic rhinitis (AR is a public health problem and the smoking continues having important prevalence in spite of numerous measures applied worldwide. Objective: to estimate the association between smoking and AR. Methods: analytic study, of cases and controls, in which the cases were patients with AR and the control ones, patients with other diseases of the high respiratory way non-related with the rhinitis. It was carried out in the Hospital Universitario del Caribe, Cartagena, Colombia. Data obtained in the surveys were analyzed. The OR with its respective confidence intervals of 95% were used to calculate the association between smoking and AR. Covariates were adjusted by means of a multivariable logistic regression. A P<0.05 was considered statistically significant. Results: 53 cases and 140 controls were included. There were not found statistically significant differences in the socio-demographic variables between cases and controls. The association between active smokers and AR had OR adjusted by confusion variables of 1.02 (CI 95%, 0.25-4.24. Conclusion: there was not found association between smoking and AR. Rev.cienc. biomed. 2014;5(2:205-210. KEYWORDS Rhinitis, Perennial allergic rhinitis, Smoking.

  13. MIGRAÇÃO E APROPRIAÇÃO DA OBRA DE FAULKNER NO CARIBE leituras de Edouard Glissant

    Directory of Open Access Journals (Sweden)

    Eurídice Figueiredo

    2012-12-01

    Full Text Available Este artigo propõe uma leitura cruzada das obras de Edouard Glissant e William Faulkner a partir de duas obras do escritor martinicano: o ensaio Faulkner, Mississipi e o romance Sartorius. No primeiro, ele dá ênfase a questões presentes em sua própriaobra romanesca: a genealogia, a relação com o espaço daplantação, a mestiçagem, a (ilegitimidade de direitos dos brancos sobre a terra, a opacidade. Já no romance, ele traça uma linhagem genealógica de um personagem pertencente a uma etnia africana imaginária; paralelamente, há a linhagem genealógica dos Sartoris. Pretendo mostrar como o projeto literário de Glissant dialoga com a obra de Faulkner, perscrutando e inventariandoas mesmas perplexidades em relação à migração de populações esua reinserção no espaço das plantações, seja no Sul dos Estados Unidos ou nas ilhas do Caribe.

  14. UN ANÁLISIS DE CONTENIDO DE LAS PUBLICACIONES DEL CONGRESO LATINOAMERICANO Y DEL CARIBE SOBRE ESPÍRITU EMPRESARIAL

    Directory of Open Access Journals (Sweden)

    LESLIE BORJAS PARRA

    2009-01-01

    Full Text Available El objetivo de la investigación es analizar los trabajos arbitrados presentados en el marco de los Congresos Latinoamericanos y del Caribe sobre Espíritu Empresarial (CLCEE realizados en el período 2004 - 2007, para plantear un esquema de contenido hacia próximas versiones. El método elegido fue el análisis de contenido, el cual permitió establecer categorías para la revisión del corpus: tendencias, aspectos teóricos, abordajes metodológicos, innovaciones y el análisis bibliométrico. Se seleccionaron las categorías con base en los principales aspectos expuestos en la literatura internacional. El corpus fueron 48 ponencias arbitradas. El estudio aportó conclusiones acerca del estado de los avances temáticos, las perspectivas que se vislumbran hacia versiones futuras y las orientaciones que deberían abordarse para ajustarse a la evolución contextual del entrepreneurship en América Latina.

  15. Mercury Plumes in the Global Upper Troposphere Observed during Flights with the CARIBIC Observatory from May 2005 until June 2013

    Directory of Open Access Journals (Sweden)

    Franz Slemr

    2014-05-01

    Full Text Available Tropospheric sections of flights with the CARIBIC (Civil Aircraft for Regular Investigation of the Atmosphere Based on an Instrumented Container observatory from May 2005 until June 2013, are investigated for the occurrence of plumes with elevated Hg concentrations. Additional information on CO, CO2, CH4, NOy, O3, hydrocarbons, halocarbons, acetone and acetonitrile enable us to attribute the plumes to biomass burning, urban/industrial sources or a mixture of both. Altogether, 98 pollution plumes with elevated Hg concentrations and CO mixing ratios were encountered, and the Hg/CO emission ratios for 49 of them could be calculated. Most of the plumes were found over East Asia, in the African equatorial region, over South America and over Pakistan and India. The plumes encountered over equatorial Africa and over South America originate predominantly from biomass burning, as evidenced by the low Hg/CO emission ratios and elevated mixing ratios of acetonitrile, CH3Cl and particle concentrations. The backward trajectories point to the regions around the Rift Valley and the Amazon Basin, with its outskirts, as the source areas. The plumes encountered over East Asia and over Pakistan and India are predominantly of urban/industrial origin, sometimes mixed with products of biomass/biofuel burning. Backward trajectories point mostly to source areas in China and northern India. The Hg/CO2 and Hg/CH4 emission ratios for several plumes are also presented and discussed.

  16. Favourable impact of regular swimming in young people with haemophilia: experience derived from 'Desafio del Caribe' project.

    Science.gov (United States)

    Boadas, A; Osorio, M; Gibraltar, A; Rosas, M M; Berges, A; Herrera, E; Gadea, S; Gutiérrez, M Á; Salazar, F; Ruiz-Sáez, A

    2015-01-01

    Swimming is beneficial for persons with haemophilia (PWH) providing good maintenance of the cardiovascular and musculoskeletal system and improving many psychological characteristics. In the Desafío del Caribe Project, young PWH from Venezuela and Mexico took part in an open water competition in the Gulf of Mexico under a multidisciplinary team supervision. Eight severe haemophilia A, two moderate haemophilia A, one severe haemophilia B and two moderate haemophilia B subjects were included. Haematological, musculoskeletal and psychological evaluations were carried out before and during training for the competition. Training program included physical exercise routines and swimming practices that alternated between pools and open water. Swimmers had coverage with factor concentrates before pool and open water trainings. In physiatric evaluations, the Hemophilia Joint Health Score (HJHS) was used. The objective of the psychology area was to analyse self-esteem, precompetition anxiety, coping mechanisms and relaxation levels. The need of factor prophylaxis before intense trainings was confirmed. In the musculoskeletal system a decrease of elbow pain as well as an increase of muscle strength in the ankles were observed. In the psychological area significant differences between the first and second test in self-esteem levels, cognitive anxiety and group cohesion were found. PWH must be provided with orientation and encouragement to practice swimming regularly. High competition exercise must be supervised by a multidisciplinary team which must evaluate the pros and cons of the activity to make relevant recommendations. PMID:25359594

  17. CO2 isotope analyses using large air samples collected on intercontinental flights by the CARIBIC Boeing 767.

    Science.gov (United States)

    Assonov, S S; Brenninkmeijer, C A M; Koeppel, C; Röckmann, T

    2009-03-01

    Analytical details for 13C and 18O isotope analyses of atmospheric CO2 in large air samples are given. The large air samples of nominally 300 L were collected during the passenger aircraft-based atmospheric chemistry research project CARIBIC and analyzed for a large number of trace gases and isotopic composition. In the laboratory, an ultra-pure and high efficiency extraction system and high-quality isotope ratio mass spectrometry were used. Because direct comparison with other laboratories was practically impossible, the extraction and measurement procedures were tested in considerable detail. Extracted CO2 was measured twice vs. two different working reference CO2 gases of different isotopic composition. The two data sets agree well and their distributions can be used to evaluate analytical errors due to isotope measurement, ion corrections, internal calibration consistency, etc. The calibration itself is based on NBS-19 and also verified using isotope analyses on pure CO2 gases (NIST Reference Materials (RMs) and NARCIS CO2 gases). The major problem encountered could be attributed to CO2-water exchange in the air sampling cylinders. This exchange decreased over the years. To exclude artefacts due to such isotopic exchange, the data were filtered to reject negative delta18O(CO2) values. Examples of the results are given. PMID:19219897

  18. APORTES A LA BIOLOGÍA DE TIBURONES Y RAYAS DEMERSALES EN LA REGIÓN NORTE DEL CARIBE COLOMBIANO

    Directory of Open Access Journals (Sweden)

    Acevedo Kelly

    2008-12-01

    Full Text Available El presente estudio es una contribución al conocimiento biológico de los peces cartilaginosos en la región norte del Caribe colombiano. Los ejemplares examinados se capturaron con una red demersal, se determinó su peso, longitud total y estado de madurez sexual. Adicionalmente se realizó la ubicación espacial de las capturas y la relación con las variables ambientales. Se capturaron un total de 21 individuos, colectando tres especies de rayas, Dasyatis americana, D. guttata y Rhinobatos percellens, dos de tiburones Mustelus minicanis y Rhizoprionodon porosus, la más común fue D. guttata con 56%, las tallas (longitud total fluctuaron entre los 1.760 - 394 mm en rayas y 595 - 585 mm en tiburones. Se obtuvieron más hembras que machos para todas las especies, con predominio de estados inmaduros y en maduración, solo se registró una hembra grávida deM. Minicanis con dos embriones.

  19. FESTIVAL VER CIENCIA CARIBE: UN MODELO DE APROPIACIÓN SOCIAL DEL CONOCIMIENTO CIENTÍFICO REGIONAL

    Directory of Open Access Journals (Sweden)

    Carlos Ospina Bozzi

    2007-08-01

    Full Text Available El Festival Ver Ciencia Caribe se aborda desde la recuperación y valorización de lainvestigación científica regional, la inteligencia colectiva y la identidad cultural.Promueve el objetivo social de construir una cultura científica humanística que lapoblación juvenil pueda llegar a sentir como propia.El modelo de apropiación que estamos presentando a la comunidad internacionalentiende que es posible producir materiales de divulgación científica, popularizacióny apropiación social del conocimiento, útiles tanto para el ámbito de la enseñanza formal como para el de la educación informal, mediante múltiples usos, tanto en la emisión en medios de comunicación masiva, como en el aula de clase y en otros ámbitos sociales.

  20. Ash properties of Pinus halepensis needles treated with diammonium phosphate

    Energy Technology Data Exchange (ETDEWEB)

    Liodakis, S.; Katsigiannis, G.; Lymperopoulou, T. [Laboratory of Inorganic and Analytical Chemistry, Department of Chemical Engineering, National Technical University of Athens (NTUA), 9 Iroon Polytechniou Street, Athens 157 73 (Greece)

    2007-02-01

    The ash properties of Pinus halepensis (Aleppo pine) needles before and after treatment with diammonium phosphate (NH{sub 4}){sub 2}HPO{sub 4} (DAP) have been investigated, using thermogravimetric analysis (TG), differential thermal analysis (DTA), titrimetry, inductively coupled plasma-emission spectrometry (ICP-ES), X-ray diffraction (XRD) and scanning electron microscopy (SEM). DAP is extensively used as active component in wildland fire retardants. The following crystalline compounds have been identified in ashes prepared at 600 C before treatment with DAP: KCl, Ca(OH){sub 2}, MgO, (CaMg)CO{sub 3}, K{sub 2}CO{sub 3}.CaCO{sub 3}, K{sub 2}CO{sub 3}, K{sub 2}SO{sub 4}, CaO and CaCO{sub 3}, whereas CaO, MgO, K{sub 2}SO{sub 4}, K{sub 2}CO{sub 3}, CaCO{sub 3}, KCl and CaO, MgO, K{sub 2}SO{sub 4} and K{sub 2}CO{sub 3} at 800 and 1000 C, respectively. The presence of DAP alters the composition of ashes converting, almost completely at high temperatures, the metallic oxides into phosphate salts. Thus, decreasing their alkalinity. The micrographs obtained by SEM indicate that pine needles ashes contain large porous particles of carbon compounds and several inorganic particles of irregular shape <1.0 mm, whereas after treating the needles with DAP an amorphous rigid structure was formed. To facilitate our investigation model mixtures of CaCO{sub 3} + DAP, MgCO{sub 3} + DAP, K{sub 2}CO{sub 3} + DAP were heat treated under the same conditions used for preparing the ashes. The chemical transformations taken place during heating were studied by analysing the reaction products using thermal analysis and XRD. The physical, mineralogical and chemical forest ash properties determined could be used to evaluate the environmental risk of the use of fire retardants on soils, plants and aquatic systems as well as to investigate the mechanism of combustion of forest fuels in the presence of DAP. (author)

  1. Seed source variation and conservation of Pinus wallichiana in India

    Directory of Open Access Journals (Sweden)

    M. Thapliyal

    2008-09-01

    Full Text Available Pinus wallichiana A.B. Jacks is an important component of the middleand high altitude Himalayan forests having large natural distribution ranging between 260 to 360 N latitude and 690 to 750 E longitudes. It is commonly known as Himalayan blue pine or blue pine, being indigenous to Himalayan Mountain regions and because of its bluish or grayish-green leaves. It is a five needle pine which gained world-wide attention for its resistance to blister rust among white pines. This species has been crossed successfully with other white pines and vigorous hybrids have been obtained. Considerable variation in morphological and anatomical characteristics of needles, cones and seeds in natural stands exists across the natural distribution of the species, especially in mesic and xeric habitats. These variationssuggested the differentiation of this species in ecotypes or varieties as reported by various authors. However, the level of genetic diversity was found to be relatively high and the degree of genetic differentiation was low compared to other pines. Thewide range of climatic conditions in the natural distribution of this pine is expected to result in high genetic variation within different populations of the species. The study aims to determine the nature and extent of variation present in the populations of the species in respect to cone and seed characteristics across its natural distribution. Seed of 17 seed sources from the states of Uttaranchal and Himachal Pradesh was collected and analyzed for cone characters (fresh weight of cones, cone length, cone width, specific gravity and seed characters (seed weight, moisture content, germination percent, cotyledon number. Significant variations have beenobserved in these traits among different seed sources of the species. The cone weight varied from 44.4 to114g and the higher cone weight was recorded at higher altitudes.The germination percent varied from 40 to 85 whereas cotyledon number varied from 7

  2. Galactoglucomannan Oligosaccharides (GGMO) from a Molasses Byproduct of Pine (Pinus taeda) Fiberboard Production

    Science.gov (United States)

    "Temulose" is the trade name for a water-soluble molasses produced on a large scale (300 - 400 tonnes per year) as a byproduct of the fiberboard industry. The feedstock for temulose is predominantly a single species of pine (Pinus taeda) grown and harvested in stands in south-eastern Texas. Becaus...

  3. Seleção precoce de progênies de Pinus radiata a Sphaeropsis sapinea

    Directory of Open Access Journals (Sweden)

    Paula Rachel Rabelo Corrêa

    2012-06-01

    Full Text Available http://dx.doi.org/10.5902/198050985734Sphaeropsis sapinea é um importante patógeno para Pinus radiata, causando seca de ponteiros e morte de árvores, em plantios comerciais. Este estudo teve como objetivo selecionar progênies de Pinus radiata resistentes ao patógeno. Mudas de 16 progênies de Pinus radiata foram inoculadas com três isolados monospóricos do patógeno, em condição de casa de vegetação. Foram avaliados o comprimento das lesões e o grau de secamento dos ponteiros. Os resultados indicaram que a metodologia de seleção precoce foi adequada para selecionar progênies de Pinus radiata resistentes ao Sphaeropsis sapinea. A herdabilidade média das progênies variou de acordo com o isolado testado e o critério de seleção utilizado.

  4. JUVENILE-MATURE GENETIC CORRELATIONS IN Pinus taeda CLONES PROPAGATED VIA SOMATIC EMBRYOGENESIS

    Directory of Open Access Journals (Sweden)

    Poliana Coqueiro Dias

    2016-04-01

    Full Text Available ABSTRACT This study aimed to estimate the genetic correlation among selection ages (juvenile - adult and efficiency of early selection for the height, diameter, and volume traits of individuals from Pinus taeda families propagated via somatic embryogenesis. This study was carried out by genetic-statistical analysis, estimation procedure of variance (Reml, and prediction components of breeding values (Blup, using the Selegen-Reml/Blup software. Genetic correlations among juvenile ages and rotation age were performed by applying the linear model developed by Lambeth (1980. In accordance with results of the established model, the early selection can be performed in clones of Pinus taeda with high selection efficiency. Ages from 4 to 6 years old are enough to select Pinus taeda clones propagated via somatic embryogenesis for harvesting at 8 and 12 years old; and 6 to 10 years old are enough to select them for harvesting at 20 years old. On the basis of the genetic correlations estimates from the environments, the clones' selection of Pinus taeda propagated via somatic embryogenesis should be developed specifically for each environment. The clones' selection can be performed considering the diameter due to the high correlation between volume and diameter.

  5. ECTOMYCORRHIZAL DIVERSITY IN A LOBLOLLY PINE (PINUS TAEDA L.) GENETICS PLANTATION: INFLUENCE OF FERTILIZATION

    Science.gov (United States)

    Loblolly pine (Pinus taeda L.) Has co-evolved a high dependency on ectomycorrhizal (ECM) associations most likely because its natural range includes soils of varying moisture that are P- and/or N-deficient. Because of its wide geographic distrubition, we would expect its roots t...

  6. Mechanical resistance by an ectorganic soil layer on roo development of seedling Pinus sylvestris.

    NARCIS (Netherlands)

    den Ouden, J.; Vogels, D.

    1997-01-01

    We investigated early root development of Pinus sylvestris seedlings in relation to bulk density and natural particle layering in an ectorganic soil layer from a bracken (Pteridium aquilinum) stand. Responses in root development to two levels of bulk density (0.07 and 0.15 g/cm3) in mixed bracken su

  7. Strength of adsorption of polyethylene glycol on pretreated Pinus radiata wood and consequences for enzymatic saccharification

    International Nuclear Information System (INIS)

    Softwood substrates are recalcitrant in enzymatic hydrolysis to reducing sugars, in part because of unproductive binding of enzymes on lignin. Interactions between polyethylene glycol (PEG) and a softwood substrate were characterised in order to estimate the PEG loadings required for effective blocking of unproductive enzyme binding. For the first time, the adsorption of Rhodamine labelled PEG (Mw 3400) on thermo-mechanically treated Pinus radiata fibres was characterised by fluorimetry, giving a best-fit binding constant of 68 L g−1. This was considerably stronger than published binding constants of 6 L g−1 for enzymes on lignin, accounting for the success of PEG as an additive. Glucose yields from enzymatic hydrolysis of the same substrate, when unlabelled PEG (Mw 4000) was used, were consistent with a PEG adsorption capacity of 0.01–0.02 g g−1 substrate. Thus, PEG was shown to be effective at affordably low loadings and further mathematical modelling work predicts savings correspond to 6 kg PEG per tonne when pretreated Pinus radiata substrate was processed at higher substrate concentration. - Highlights: • Binding constant of Rhodamine labelled PEG on pretreated Pinus radiata is 68 L g−1. • This value is ten-fold higher than binding constant for cellulase on lignin. • Effect of PEG molecular weight and substrate lignin content on saccharification. • PEG is affordable in saccharification of pretreated Pinus radiata. • Model predicts savings in PEG at high substrate consistency saccharification

  8. MODIFYING LIGNIN IN CONIFERS: THE ROLE OF HCT DURING TRACHEARY ELEMENT FORMATION IN PINUS RADIATA

    Science.gov (United States)

    The enzyme hydroxycinnamoyl-CoA: shikimate hydroxycinnamoyltransferase (HCT) is involved in the production of methoxylated monolignols that are precursors to guaiacyl and syringyl lignin in angiosperm species. We identified and cloned a putative HCT gene from Pinus radiata, a coniferous gymnosperm, ...

  9. Distribución de los gasterópodos del manglar, Neritina virgínea (Neritidae) y Littoraria angulifera (Littorinidae) en la Ecorregión Darién, Caribe colombiano

    OpenAIRE

    Luis Ferney Ortiz; Juan Felipe Blanco

    2012-01-01

    Aunque los gasterópodos son uno de los grupos más abundantes en los manglares del Caribe, poco se sabe del ámbito de especies particulares debido al enfoque comunitario de la mayoría de los estudios. El ámbito de las poblaciones de L. angulifera y N. virginea fue estudiado en la Ecorregión Darién, Caribe colombiano. El muestreo se realizó entre junio y agosto 2009, se recolectaron 3 963 individuos de ambas especies, a los cuales se les midió la talla de la concha. La Ecorregión presentó difer...

  10. Perspectivas sobre la generación distribuida mediante energías renovables en América Latina y el Caribe: Análisis de estudios de caso para Jamaica, Barbados, México y Chile

    OpenAIRE

    Christiaan Gischler; Nils Janson

    2011-01-01

    El presente documento analiza la manera de promover la generación distribuida (GD) utilizando energías renovables en mercados emergentes de América Latina y el Caribe con el propósito de incrementar la competitividad y lograr un crecimiento económico sostenible. En este trabajo se analizan cuatro estudios de casos en el Caribe (Jamaica y Barbados) y América Latina (México y Chile) para evaluar qué están haciendo o no están haciendo esos países para promover la GD renovable y por qué. Estos ca...

  11. La integración multinacional latinoamericana y caribeña: un enfoque desde la prospectiva crítica y participativa

    Directory of Open Access Journals (Sweden)

    Salazar Luis Suárez

    2005-01-01

    Full Text Available A partir de los principales enunciados teórico-prácticos de la denominada "prospectiva crítica", luego de tomar posición frente a las discusiones que se están desarrollando en la actualidad en torno a las implicaciones de "la globalización" y del "fenómeno imperialista", así como de realizar una síntesis de los diferentes componentes de lo que su autor ha venido denominando "un nuevo orden panamericano", el artículo realiza un análisis crítico del estado actual de los diferentes proyectos de integración multinacional que se están desarrollando en América Latina y el Caribe: el Sistema de Integración Centroamericano (SICA, la Comunidad del Caribe (CARICOM, la Comunidad Andina de Naciones (CAN y el Mercado Común del Sur (MERCOSUR. A partir de ese análisis -y tomando en cuenta algunos de los enunciados de la Iniciativa Bolivariana para las Américas (ALBA, recientemente dados a conocer por los presidentes de la República Bolivariana de Venezuela, Hugo Chávez y Fidel Castro, respectivamente- el autor propone algunas ideas vinculadas a lo que denomina "un nuevo paradigma para la integración multinacional de América Latina y el Caribe" que, al unísono, sea capaz de confrontar la "integración coercitiva" que (a través del ALCA y de los TLC está impulsando el gobierno de los Estados Unidos en consuno con algunos gobiernos del hemisferio occidental, así como de superar los limitados resultados del "regionalismo abierto" impulsado, desde hace una década, por la Comisión Económica para América Latina (CEPAL.

  12. SO2 and BrO observation in the plume of the Eyjafjallajökull volcano 2010: CARIBIC and GOME-2 retrievals

    Directory of Open Access Journals (Sweden)

    P. F. J. van Velthoven

    2010-12-01

    Full Text Available The ash cloud of the Eyjafjallajökull1 volcano on Iceland caused closure of large parts of European airspace in April and May 2010. For the validation and improvement of the European volcanic ash forecast models several research flights were performed. Also the CARIBIC (Civil Aircraft for the Regular Investigation of the atmosphere Based on an Instrument Container flying laboratory, which routinely measures at cruise altitude (≈11 km performed three dedicated measurements flights through sections of the ash plume. Although the focus of these flights was on the detection and quantification of the volcanic ash, we report here on sulphur dioxide (SO2 and bromine monoxide (BrO measurements with the CARIBIC DOAS (Differential Optical Absorption Spectroscopy instrument during the second of these special flights on 16 May 2010. As the BrO and the SO2 observations coincide, we assume the BrO to have been formed inside the volcanic plume. Both SO2 and BrO observations agree well with simultaneous satellite (GOME-2 observations. SO2 column densities retrieved from satellite observations are often used as an indicator for volcanic ash. For SO2 some additional information on the local distribution can be derived from a~comparison of forward and back scan GOME-2 data. More details on the local plume size and position are retrieved by combining CARIBIC and GOME-2 data. 1Also referred to as: Eyjafjalla (e.g. Schumann et al., 2010, Eyjafjöll or Eyjafjoll (e.g. Ansmann et al., 2010.

  13. The seed bank in Pinus stand regeneration in NW Spain after wildfire

    Directory of Open Access Journals (Sweden)

    L. Calvo

    2001-05-01

    Full Text Available In the Cantabrian area (northwest Spain Pinus stands occupy many of the original shrub communities that have been considered unproductive. These Pinus stands represent the vegetation which is most affected by fire. Regeneration after fire may occur in different ways: by resprouting or by germination or both. Germination was the only regeneration mechanism in Pinus species that appeared in these areas. The aim of this study is to determine the role of the soil seed bank in regeneration in this type of ecosystem. In order to carry out the study, three communities dominated by Pinus sylvestris which had suffered wildfires were chosen. In each of the three experimental sites of Pinus sylvestris stands the seed bank composition and above-ground vegetation were studied. The results allowed three species groups in the seed bank to be differentiated: those favoured by fire, amongst which some hardseeds, mainly belonging to Cistaceae and Leguminosae, were found; another group formed by outsider or opportunist species from outside the community and which used anemochory as their main dispersion mechanism; and the third group formed by those negatively affected, amongst which were species using vegetative resprout as the main regeneration mechanism. The species of greatest quantitative importance in the seed bank was Erica australis. In general, anemochorous species were predominant in the soil seed bank. During the first stages of succession chamaephytes were dominant and in the two years after fire therophytes were. No great similarity was observed between the bank composition and field vegetation from a qualitative viewpoint, due to differences in the presence of seeds of outsider plants in the bank and to the significance of the resprouting species in the field.

  14. Estrategias e instrumentos financieros para la gestión del riesgo de desastres en América Latina y el Caribe

    OpenAIRE

    Stuart Miller; Kari Keipi

    2006-01-01

    El presente documento investiga las posibles medidas que se pueden aplicar para reducir las pérdidas económicas resultantes de las amenazas naturales, y analiza los temas ex ante y ex post que afectan la gestión del riesgo de desastres. También evalúa de qué modo se pueden utilizar conjuntamente ambos tipos de medidas para reducir el impacto económico de los desastres en los países de América Latina y el Caribe y en el BID. Los autores presentan argumentos a favor de una estrategia equilibrad...

  15. CONTRIBUCIÓN ANTROPOGÉNICA A LOS CAMBIOS GEOMORFOLÓGICOS Y EVOLUCIÓN RECIENTE DE LA COSTA CARIBE COLOMBIANA

    OpenAIRE

    RANGEL BUITRAGO NELSON

    2010-01-01

    La evolución reciente del Caribe colombiano está asociada, entre otras causas, a una marcada influencia antropogénica sobre la morfología litoral. A lo largo de los 30 municipios costeros que conforman esta región, se encuentran áreas intervenidas por el hombre que al mismo tiempo son afectadas por retrocesos significativos en su línea de costa. La tendencia erosiva predominante es influenciada y multiplicada, en muchos de los casos, por una expansión humana desorganizada y los fenómenos que ...

  16. La crisis financiera y su impacto en las asociaciones público privadas (APPs) en América Latine y el Caribe (LAC) y en el mundo

    OpenAIRE

    Hans Schulz

    2009-01-01

    Presentación expuesta durante el seminario "Desarrollo de Infraestructura para un Crecimiento Económico Sostenible. Lecciones Aprendidas de la Experiencia Española", llevado a cabo en Madrid, España, en octubre 2009. El objetivo de esta presentación es ilustrar un marco general de cómo la crisis financiera del 2008, afectó las Alianzas Público Privadas en América Latina, el Caribe, y el resto del mundo en general.

  17. “Agriculturización” y cambios en el paisaje. El banano en el Atlántico/Caribe de Costa Rica (1870-1930)

    OpenAIRE

    Andrea Montero Mora; Ronny Viales Hurtado

    2014-01-01

    En Costa Rica el cultivo comercial del banano inició en la década de 1870 en el Atlántico/Caribe costarricense. Su impulso debe comprenderse en el contexto del desarrollo del export led growth, que consolidó un estilo de capitalismo agrario basado en la agriculturización/ganaderización. El presente artículo pretende acercarse a la huella visible que dejó la actividad bananera durante su primer ciclo, pues la plantación a gran escala provocó cambios en el paisaje. Comenzaremos con una sucinta ...

  18. Los seguros agrícolas: Evolución y perspectivas en América Latina y el Caribe

    OpenAIRE

    Mark D. Wenner

    2005-01-01

    Este documento se centra en el manejo de riesgos de producción agrícola, explica los conceptos fundamentales y analiza los motivos por los que los mercados de seguros han demorado en desarrollarse en América Latina y el Caribe. Asimismo, formula recomendaciones para la creación de mercados sostenibles en contextos de países en desarrollo. En este trabajo, se sostiene que los escasos recursos públicos estarían mejor invertidos en la creación de condiciones de mercado favorables para el desarro...

  19. Identidades en tránsito. Reformulando el Caribe desde España a través de la obra de Gertrudis Rivalta y Brenda Cruz

    OpenAIRE

    Alcaide Ramírez, Aurora

    2015-01-01

    Este artículo analiza las obras Soy Cuba y Verano de la artista cubana Gertrudis Rivalta y Soy: un cuerpo tatuado y Fronteras de la puertorriqueña Brenda Cruz, en las que ambas creadoras, que emigraron a España hace casi dos décadas, problematizan acerca de los movimientos migratorios, la raza, la identidad cultural y la ciudadanía en el Caribe hispano, profundizando en nociones como la de “mulata”, “transculturación” y “otredad” desde una perspectiva de género, decolonial y autob...

  20. Diagnóstico de la situación del manejo de residuos sólidos municipales en América Latina y el Caribe

    OpenAIRE

    Guido Acurio; Antonio Rossin; Paulo Fernando Teixeira; Francisco Zepeda

    1997-01-01

    El capítulo 21 de la Agenda 21 establece las bases para un manejo integral de los residuos sólidos municipales como parte del desarrollo sostenible. Este diagnóstico de la situación del manejo de residuos sólidos municipales en Latinoamérica y el Caribe (ENV.97-107), realizado conjuntamente por el Banco Interamericano de Desarrollo y la Organización Panamericana de la Salud/Organización Mundial de la Salud, es un primer intento para medir los avances logrados en el continente cinco años despu...

  1. Explorando nuevos caminos de regionalización e integración en América Latina y El Caribe

    OpenAIRE

    Allard Neumann, Raúl

    2013-01-01

    El sistema internacional actual presenta oportunidades a América Latina y el Caribe, conglomerado de 33 países que crece con desigualdades y representa una realidad diversa y colectiva. Con experiencias incompletas de integración y una red de acuerdos intrarregionales se aprecia una realidad actual que supera el “regionalismo abierto” y avanza hacia un nuevo regionalismo emergente por la vía de la convergencia de los mecanismos actuales. En este contexto, se promueve un Sistema de Integrac...

  2. Análisis multidimensional del estado de bienestar emergente y la pobreza en América Latina y el Caribe: Puerto Rico como estudio de casos

    OpenAIRE

    Cruz-Martínez, Gibrán

    2015-01-01

    En las ultimas décadas ha aumentado el interés de los investigadores en analizar diferentes aspectos del Estado de bienestar (EB) emergente en América Latina y el Caribe (ALC). Sin embargo, se le ha dedicado poca atención a analizar el grado de desarrollo de los programas e instituciones del EB en las regiones emergentes. En la tesis doctoral se realizó un análisis multidimensional del desarrollo del EB emergente y la pobreza en la región de ALC; utilizando a Puerto Rico como estudio de caso....

  3. Sindicalismo docente, gobiernos y reformas educativas en América Latina y el Caribe: Condiciones para el diálogo

    OpenAIRE

    Mariano Palamidessi; Martín Legarralde

    2006-01-01

    Este trabajo fue desarrollado entre los meses de julio y septiembre de 2006, como parte de las actividades de la Red de Educación del Diálogo Regional de Política impulsado por el Banco Interamericano de Desarrollo (BID). La Red de Educación es un espacio creado para discutir políticas e iniciativas para América Latina y el Caribe por medio del intercambio de ideas y de buenas prácticas, del análisis de problemas comunes y de la revisión de estudios sobre los avances de la política educativa ...

  4. Variación espacial de la comunidad macroinfaunal de praderas de pastos marinos de San Andrés Isla, Caribe colombiano

    OpenAIRE

    Campos Néstor; Amórtegui Rodríguez Edna Liliana; Polanía Jaime

    2006-01-01

    Se estudió la distribución espacial de la macroinfauna asociada a pastos marinos de las bahías Hooker,
    Honda y Sea Horse de la isla de San Andrés (Caribe colombiano), en época seca. Se tomaron muestras de
    sutrato en tres rangos de profundidad (0-2, 2-5 y >5m) en cada bahía para un total de nueve estaciones. Se compararon las características estructurales de cada estación, encontrando bajas densidades promedio
    (187 ind/m2). Por medio de análisis de clasifica...

  5. Velocidad de descomposición de la hojarasca en diferentes sustratos de manglar en San Andrés Isla, Caribe colombiano

    OpenAIRE

    Mancera P. José Ernesto; Medina Calderón Jairo; Sierra Rozo Omar Alfonso; Santos-Martínez Adriana

    2007-01-01

    La degradación de la hojarasca de manglar fue estudiada en diferentes sustratos de tres humedales de manglar
    en San Andrés isla, Caribe colombiano. Las tasas de descomposición de Rhizophora mangle (mangle rojo),
    Laguncularia racemosa (mangle blanco) y Avicennia germinans (mangle negro) fueron medidas en bolsas tipo
    malla. Algunas bolsas fueron dispuestas bajo el suelo, otras sumergidas en el agua, y otras sobre la superficie
    del suelo. Dos humedales...

  6. Seguridad y salud en el trabajo en América Latina y el Caribe: Análisis, temas y recomendaciones de política

    OpenAIRE

    Iunes, Roberto F.

    2002-01-01

    En este documento se discute el tema de la seguridad y la salud en el trabajo en América Latina y el Caribe. Abordar esta problemática es una tarea sumamente compleja que requiere tratar las responsabilidades que se superponen entre los ministerios de trabajo y salud y entre aseguradores privados e institutos de seguridad social. Requiere también la participación de asociaciones empresariales y sindicatos de trabajadores, negociadores de comercio internacional y expertos en medio ambiente. Ad...

  7. La precarización del mercado de trabajo: análisis desde Europa y América Latina y el Caribe

    OpenAIRE

    Sophie BOUTILLER; Beatriz CASTILLA-RAMOS

    2012-01-01

    Se analizan las grandes tendencias internacionales de la evolución del empleo en el periodo de 2000-2010 con base en la información proporcionada por la oit, la cepal y el fmi. El universo de estudio se centra en los países de las regiones de la Unión Europea y América Latina y el Caribe, con especial atención en Francia y México. La hipótesis propuesta es que pese a las grandes diferencias que existen en los niveles de desarrollo de dichas regiones, las modalidades del empleo detectadas en e...

  8. Red GEALC: Cinco Años de Apoyo al e-Gobierno en América Latina y El Caribe

    OpenAIRE

    Banco Interamericano de Desarrollo (BID)

    2010-01-01

    La Red de Líderes de Gobierno Electrónico de América Latina y el Caribe (Red GEALC), es un mecanismo de cooperación sistemática que apoya los procesos de desarrollo institucional y avance del e-gobierno en la región. La Red está conformada por los representantes de las instituciones que trabajan y diseñan políticas para lograr, a través del e-Gobierno, transformar y modernizar la administración pública en sus países.

  9. La violencia en América Latina y el Caribe: Un marco de referencia para la acción

    OpenAIRE

    Mayra Buvinic; Andrew Morrison; Michael Shifter

    1999-01-01

    ¿Qué es lo que gatilla la violencia en América Latina y el Caribe? ¿Qué se puede hacer para controlar la violencia tanto dentro como fuera del hogar? ¿Qué se puede aprender de la experiencia que tiene la región en cuanto a la violencia? Con el fin de ayudar a responder estas interrogantes, este artículo presenta una clasificación de los tipos de violencia, detalla algunos de los principales costos socioeconómicos que resultan de la violencia e identifica los principales factores contribuyente...

  10. La crisis económica y financiera en los países de América Latina y del Caribe. Consecuencias futuras

    OpenAIRE

    Martínez González, Antonio

    2010-01-01

    Mucho se ha hablado y escrito sobre la actual crisis económica y financiera que está golpeando tan duramente las economías desarrolladas. Al afectarnos de manera tan compleja y directa, se está prestando escasa atención a sus efectos sobre las economías y el sistema financiero de América Latina y el Caribe. El objeto de este trabajo es el de analizar de qué forma la crisis actual se está manifestando en dicha zona y los posibles efectos futuros sobre su sistema económico y financiero.

  11. Adaptación del arroz riego (Oryza sativa L.) en el Caribe colombiano Adaptation of irrigated rice (Oryza sativa L.) in the colombian Caribbean

    OpenAIRE

    Hermes Aramendiz Tatis; Miguel Espitia Camacho; Carlos Cardona Ayala

    2011-01-01

    En Colombia, el arroz ocupa el primer lugar en seguridad alimentaria, valor económico y generación de empleo entre los cultivos anuales, siendo el sistema bajo riego más importante. El objetivo fue determinar el progreso, estabilidad y adaptabilidad del rendimiento de arroz bajo riego, en cinco departamentos del caribe colombiano. Se utilizaron datos del Ministerio de Agricultura y Desarrollo Rural, correspondiente a los Departamentos de Córdoba, Bolívar, Magdalena, Cesar y Guajira, durante e...

  12. Presencia de bacterias asociadas a nieve marina en arrecifes influenciados por escorrentía continental del Caribe colombiano: primer acercamiento

    OpenAIRE

    Hernán Alejandro Henao-Castro; Elvira M. Alvarado Ch; Laura C. Rodríguez; Johanna Santamaría

    2015-01-01

    Parte del deterioro de los arrecifes de coral se atribuye al efecto del aporte de agua dulce cargada de nutrientes y sedimentos finos. Estas condiciones favorecen la formación de nieve marina lodosa que transporta gran carga de bacterias que pueden ser patógenos de corales. Por lo anterior, se estudió la presencia de bacterias asociadas a nieve marina lodosa en una zona arrecifal del Caribe colombiano en un gradiente de distancia a la desembocadura del canal del Dique (Cartagena). Por medio d...

  13. Foraminiferos en los sedimentos superficiales del sistema lagunar de Cispatá y la interacción Río Sinú-Mar Caribe Colombiano.

    OpenAIRE

    BERNAL FRANCO, GLADYS; Ruiz Ochoa, Mauricio Andrés; Piedrahita, María Teresa; Restrepo, Evanaam

    2008-01-01

    El sistema lagunar de Cispatá es una importante zona de manglar en el Caribe colombiano. Se formó durante la evolución del delta del río Sinú y su dinámica depende del río y el mar. Se hizo un estudio de los foraminíferos bentónicos en los sedimentos superficiales como bioindicadores de la interacción fluviomarina. Se estableció la abundancia de foraminíferos y las asociaciones de especies de la epifauna. Se identificaron 82 especies. Las más abundantes fueron Trochammina inflata, Arenoparrel...

  14. Distribución, abundancia y aspectos biológicos de la almeja Polymesoda solida Phillippi, 1846 (Bivalvia: Corbiculidae) en la Isla De Salamanca, Caribe Colombiano

    OpenAIRE

    Blanco Jacobo; Hoz María Virginia de la; Campos Néstor

    2006-01-01

    Con el propósito de evaluar el estado actual de la almeja estuarina Polymesoda solida como recurso ecológico y
    pesquero, se estudiaron diversos aspectos de la población en el sector occidental de la isla de Salamanca, en el Caribe colombiano. El muestreo se llevó a cabo mensualmente en cuatro ciénagas interconectadas de este Parque Natural, tres de ellas sometidas a explotación, entre abril y noviembre de 2004. Se estimó la densidad por metro cuadrado y se efectuaron mediciones de ...

  15. Las mujeres en el mercado laboral de América Latina y el Caribe en los años 90: Una década extraordinaria

    OpenAIRE

    Suzanne Duryea; Alejandra Cox Edwards; Manuelita Ureta

    2002-01-01

    En el presente documento se ilustran los diferentes patrones de participación de la mujer en el mercado laboral en países de América Latina y el Caribe (ALC), y se investigan los factores determinantes subyacentes de los diferentes patrones. Las autoras examinen los niveles y tendencias en los resultados de los mercados laborales para las mujeres en la década del noventa utilizando encuestas de hogares de 18 países de América Latina, los cuales cubren varios años por país. Los resultados que ...

  16. Una sala de arbitraje de inversión para Suramérica y El Caribe

    Directory of Open Access Journals (Sweden)

    Pedro Duarte LLovera

    2015-03-01

    Full Text Available En tiempos de crisis capitalista e inestabilidad global, el nuevo regionalismo alternativo surge tanto como un puente y como un escudo entre los países en desarrollo y la incertidumbre global. Desde la Cumbre de las Américas de 2004, América del Sur ha ido desarrollando una nueva identidad regional, que no encaja en los conceptos actuales de regionalismo en América del norte, Europa o Asia. Este neo regionalismo que representa ALBA, la Unión de Naciones Suramericanas (UNASUR y la CELAC, refleja las heterogéneas configuraciones económicas, sociales y políticas de las fuerzas sociales y de orden político, que son únicas a nuestro continente. En tal sentido, se requiere una recta ordenación jurídica y la creación de un sistema integral de resolución de controversias que responda a nuestra realidad, sin la injerencia de agentes externos, pues tenemos las capacidades, las fortalezas y los juristas para construir una fuerte y poderosa neo institucionalidad de justicia que en caso de diferencias, permita entregar a este sistema de integración suramericano y sus integrantes una adecuada y eficaz seguridad jurídica, indispensable para seguir avanzando. Como parte integral del mismo se propone la creación de una Sala de Arbitraje y Mediación en materia de inversiones con carácter de permanencia e identidad suramericana y caribeña, para dar respuesta adjetiva y procesal a otras normas de relación internacional aceptadas por los países miembros, para así evitar demandas exageradas ante el CIADI, como el caso Exxon Mobil versus PDVSA.

  17. POBLACIÓN MUNDIAL Y DE AMÉRICA LATINA Y EL CARIBE: TRANSFORMACIONES Y NUEVOS (DES EQUILIBRIOS

    Directory of Open Access Journals (Sweden)

    CELADE CEPAL

    2012-06-01

    Full Text Available El artículo examina las notables transformaciones demográficas que ha experimentado América Latina y el Caribe en las últimas décadas, sus especificidades y los grandes desafíos que plantean para la adecuación cuantitativa y cualitativa de nuestras sociedades, sus instituciones y las respuestas de política que demandan. En 2011, la región representaba el 8,6% de la población mundial; a partir de 2015, la fecundidad regional se ubicará por debajo del nivel de reemplazo, el crecimiento de su población será inferior al promedio mundial y su peso relativo en el total disminuirá hasta un 6,8% en 2100. Actualmente, la región está experimentando los beneficios de una estructura por edad abundante en adultos jóvenes, la que puede proporcionar un gran impulso a las economías emergentes latinoamericanas en el mediano plazo si se refuerza con políticas sostenidas de incremento del capital humano y la productividad. El Brasil, por ejemplo, podría convertirse en 2050 en la cuarta economía mundial y México en la séptima. Entre tanto, el proceso de urbanización continúa, pero con cierta estabilización que puede aprovecharse para proyectar escenarios de localización a largo plazo y encarar los déficits históricos que dejó el patrón de asentamiento preponderante en el siglo XX.

  18. Capacidad solubilizadora de fosfatos de microorganismos rizosféricos asociados a dos manglares del Caribe colombiano

    Directory of Open Access Journals (Sweden)

    Galindo Castañeda Tania

    2006-06-01

    Full Text Available Se caracterizaron 28 aislamientos de microorganismos solubilizadores de fosfatos (MSF encontrados en
    rizósferas de Avicennia germinans y Rhizophora mangle en dos manglares del Caribe colombiano, uno ubicado en la
    isla de San Andrés y otro en cercanías al municipio de Barú. De estos aislamientos se eligieron 17, con el fin
    medir su eficiencia fosfatosolubilizadora in vitro. Los aislamientos más eficientes fueron HSF9 (283,1 mg*L-1
    correspondiente al hongo filamentoso Aspergillus niger, y dos especies bacterianas aún no determinadas, denominadas BR4 y SA4(3 (190 y 226 mg*L-1*24h-1 respectivamente. Mediante caracteres fisiológicos se determinó que los aislamientos bacterianos B1 y B2, corresponden a los géneros Aeromicrobium y Aquaspirillum respectivamente, y que HSF2, SR2(1 y BL1 corresponden a la levadura Debaryomyces cf. hansenii. Se encontró una relación linear inversa entre el pH y el fosfato solubilizado in vitro (r2=0,7. Los valores medidos de actividad solubilizadora indican un excedente de fosfatos para al menos ocho aislamentos según datos de crecimiento (incremento de biomasa para hongos filamentosos y número de células*mL-1*24h-1 para bacterias y levaduras. Esto eventualmente puede ser aprovechado por plántulas de mangle, lo que sugiere que la presencia de MSF es un mecanismo presente en el ecosistema para suplir deficiencias edáficas de fosfatos.

  19. Peces arrecifales de la región de santa marta (Caribe colombiano. I. lista de especies y comentarios generales

    Directory of Open Access Journals (Sweden)

    Garzón F. Jaime

    1987-06-01

    Full Text Available In the Santa Marta region (El Rodadero to Guachaquita,
    Departamento del Magdalena (Colombian Caribbean, 372 fish species have been found. A list of species is presented and the most important oceanographic and ecologic characteristics of the region are discussed. It is expected that the total number of fish species living in the continental shelf of the departamento is above 600. After comparing the list of Santa Marta fishes with those from three other regions of the tropical western Atlantic, largest differences were found with St. Croix. Due to the biological richness of the Santa Marta region, a considerable marine area was included in the Parque Nacional Natural Tayrona. It is necessary to implement a policy of rational management of the park.En la región de Santa Marta (El Rodadero hasta Guachaquita,
    Departamento del Magdalena (Caribe colombiano, se han encontrado 372 especies de peces que se relacionan más o menos estrechamente con los fondos duros. Se presenta la lista de especies y se comentan las características oceanográficas y ecológicas más importantes de la
    región. Se espera que en la totalidad de la plataforma continental del departamento el número de especies sobrepase las 600. Al comparar la lista de especies samarias con las de tres regiones del Atlántico occidental tropical se encontraron las mayores diferencias con StoCroix.
    Debido a la riqueza biológica de la región, un área marina importante fue incluida en el Parque Nacional Natural Tayrona; en la actualidad se hace necesario desarrollar una politica de manejo racional para este parque.

  20. Comparative recruitment success of pine provenances (Pinus sylvestris, Pinus nigra) under simulated climate change in the Swiss Rhone valley

    Science.gov (United States)

    Richter, Sarah; Moser, Barbara; Ghazoul, Jaboury; Wohlgemuth, Thomas

    2010-05-01

    Low elevation Scots pine forests of European inner-alpine dry valleys may potentially disappear under continued climate warming, largely in response to increased warming and drought effects. In the upper Rhone valley, the driest region in Switzerland, increased Scots pine mortality in mature forest stands and sparse tree establishment after a large-scale forest fire already give evidence for ongoing climate change. Furthermore, vegetation models predict a decline of Scots pine (Pinus sylvestris) and Pubescent oak (Quercus pubescens) even under a moderate temperature increase of 2-3°C. A decline of tree species in the region may lead to a transition from forest to a steppe-like vegetation. Such a change is of considerable concern for both biodiversity and natural hazard protection. Although changing climate conditions affect all life stages of a tree, its most vulnerable stage is recruitment. We tested P. sylvestris and P. nigra seedlings to simulated temperature increase and water stress, using seeds from the upper Rhone valley, Switzerland (CH), and from Peñyagolosa, Spain (ES). The experiment was located outdoors at the bottom of the Rhone Valley. Treatments consisted of factorial combinations of 3 precipitation regimes (‘wet spring-wet summer', ‘dry spring-dry summer' and ‘wet spring-dry summer') and 3 soil heating levels (+0 °C, +2.5 °C, +5 °C). Automatically operated shelters intercepted natural rainfall and different precipitation regimes were simulated by manual irrigation. We found significantly lower germination rates under dry conditions compared to wet conditions, whereas soil temperature affected germination rates only for P. nigra and when elevated by 5°C. Contrastingly, an increase of soil temperatures by 2.5 °C already caused a substantial decrease of survival rates under both ‘dry spring-dry summer' and ‘wet spring-dry summer' conditions. Precipitation regime was more important for survival than temperature increase. Seasonality of

  1. Degree of Hybridization in Seed Stands of Pinus engelmannii Carr. In the Sierra Madre Occidental, Durango, Mexico

    OpenAIRE

    Ávila-Flores, Israel Jaime; Hernández-Díaz, José Ciro; González-Elizondo, Maria Socorro; Prieto-Ruíz, José Ángel; Wehenkel, Christian

    2016-01-01

    Hybridization is an important evolutionary force, because interspecific gene transfer can introduce more new genetic material than is directly generated by mutations. Pinus engelmannii Carr. is one of the nine most common pine species in the pine-oak forest ecoregion in the state of Durango, Mexico. This species is widely harvested for lumber and is also used in reforestation programmes. Interspecific hybrids between P.engelmannii and Pinus arizonica Engelm. have been detected by morphologica...

  2. Biometrical study of some individuals chosen from Pinus mugo turra populations in the peat bog "Bór na Czerwonem"

    OpenAIRE

    Alina Bączkiewicz

    2014-01-01

    Sixteen individuals were sampled for study of variation in 17 anatomical and morphological characters. Only individuals of low polycormic growth (trait typical for Pinus mugo Turra) connected with incurved one-year-cone stipes (a similar situation exists in Pinus sylvestris L.) were chosen, thus the sample studied cannot be treated as a random one. It has been shown by multivariate statistical analysis that these 16 individuals are quite different from each other, Mahalanobis'generalized dist...

  3. Bibliografía sobre comercio marítimo, contrabando y piratería en las Antillas y el Caribe (artículos, ponencias y tesis desde 1980

    Directory of Open Access Journals (Sweden)

    Rodríguez Yunta, Luis

    1994-12-01

    Full Text Available Not available.

    Recopilación bibliográfica sobre comercio marítimo, contrabando y piratería en las Antillas y el Caribe, realizada sobre la base de la información disponible en las bases de datos América Latina (CSIC e Historical Abstract.

  4. El Movimiento pro-Regionalismos Alternativos frente a la Nueva Relación Estratégica América Latina, Caribe - Unión Europea. Reflexiones desde una perspectiva de género

    NARCIS (Netherlands)

    R.A. Icaza Garza (Rosalba)

    2007-01-01

    textabstractIntroducción: El 11 de Mayo del 2006, en el marco de la 4ª. Cumbre de Jefes de Estado y de Gobierno de América Latina, el Caribe y la Unión Europea (ALCUE) los y las representantes oficiales posaron para la tradicional foto del recuerdo.1 Instantes previos al fin de esta actividad, Evang

  5. Repensar el Caribe desde los Estudios Culturales: Literatura, Nación, Racialidad y Género en Donnete Francis, April Shemak y Rosamond King

    Directory of Open Access Journals (Sweden)

    Marcelo José Cabarcas Ortega

    2015-01-01

    Full Text Available Desde los estudios literarios y culturales, estas autoras se unen a un creciente número de expertas interesadas en analizar el impacto de las dinámicas neoliberales en los aspectos étnicos, sexuales y de género en el Caribe, ya sea en el archipiélago o en sus bordes continentales. Respecto a este análisis se pueden afirmar, por lo menos, dos rasgos relevantes: el primero es la importancia otorgada a las nuevas diásporas y su efecto en la actualidad; el segundo es la necesidad de ampliar el archivo literario mediante la integración de la música, la fotografía y el performance al proceso tradicional de hermenéutica. Así, al plantearse formas más incluyentes de interpretación, la crítica busca superar lugares comunes ya desgastados por el excesivo uso y sintonizarse con las inquietudes de creadoras y creadores jóvenes respecto a las realidades de la migración y su influjo en el actual redimensionamiento político del cuerpo. En esa medida, April Shemak, Donnete Francis y Rosamond King y otras escritoras problematizan la idea de un Caribe de puro contacto y difusión.

  6. LA REGIÓN HISTÓRICA MARGARITEÑA Y SU INFLUENCIA EN LA CONFORMACIÓN DE REDES COMERCIALES EN EL CARIBE

    Directory of Open Access Journals (Sweden)

    Yonezka Rondón

    2009-01-01

    Full Text Available El propósito de este ensayo es analizar la influencia de la Región Histórica margariteña en la conformación de redes comerciales en el Caribe a partir del eje político y económico: La Asunción- Pampatar como resultado de la actividad agropecuaria y del intercambio comercial que mantuvo tanto con Tierra Firme como con las Antillas y Europa. Asimismo, se analiza y el crecimiento de un comercio ilícito que se tejió alrededor de la actividad perlera y el tráfico negrero desde el siglo XVI hasta el XVIII. Se desarrolla con esta investigación el estudio de las interrelaciones de la Isla de Margarita con los espacios vecinos y sus ciudades tal como es el caso del eje La Guaira-Caracas, Guayana, Barcelona, Cumaná, Trinidad-Puerto España, Puerto Rico y Santo Domingo lo cual produjo redes comerciales caribeñas de gran importancia y significación.

  7. Análisis de la capacidad de servicio de mantenimiento de la cadena TRD Caribe Sancti Spíritus usando la simulación.

    Directory of Open Access Journals (Sweden)

    Manuel Hung Varela

    2014-09-01

    Full Text Available La investigación, tiene su origen en la necesidad de conocer, si la unidad de servicio de mantenimiento en la Cadena TRD Caribe Sancti Spíritus, es capaz de satisfacer o no las demandas de la Cadena, ya que se presenta una tendencia al crecimiento en la demanda, así como en las quejas por parte de los clientes que aseveraban largas esperas para ser servidos. Se definió el procedimiento para la simulación por eventos discretos a utilizar (Barceló Bugeda, 1996. Se definieron las fronteras del sistema, se construyó el modelo matemático para el sistema objeto de estudio y se programó en el software especializado Promodel 4.0. Para la simulación del modelo matemático, se recopiló información a través de técnicas como el muestreo aleatorio. El modelo fue verificado y validado (Barceló Bugeda, 1996; Aracil Santonja, 1995. Se simuló el modelo, haciendo uso del método de los lotes. Se procesaron los resultados de la simulación, y se concluyó que la unidad de servicio de mantenimiento no dispone de capacidad suficiente bajo las condiciones actuales para satisfacer las demandas de la cadena TRD Caribe en el territorio de Sancti Spíritus.

  8. Presencia de bacterias asociadas a nieve marina en arrecifes influenciados por escorrentía continental del Caribe colombiano: primer acercamiento

    Directory of Open Access Journals (Sweden)

    Hernán Alejandro Henao-Castro

    2015-06-01

    Full Text Available Parte del deterioro de los arrecifes de coral se atribuye al efecto del aporte de agua dulce cargada de nutrientes y sedimentos finos. Estas condiciones favorecen la formación de nieve marina lodosa que transporta gran carga de bacterias que pueden ser patógenos de corales. Por lo anterior, se estudió la presencia de bacterias asociadas a nieve marina lodosa en una zona arrecifal del Caribe colombiano en un gradiente de distancia a la desembocadura del canal del Dique (Cartagena. Por medio de técnicas moleculares PCR-DGGE, se registró baja riqueza, con bandas representativas de siete bacterias diferentes. El número de especies varió según el sitio, pero no hubo relación con la cercanía a la fuente de escorrentía. Como estudio pionero, sirve como punto de partida para estudios en arrecifes del Caribe colombiano impactados por escorrentía.

  9. Densidade e tamanho de formigueiros de Acromyrmex crassispinus em plantios de Pinus taeda Density and size of Acromyrmex crassispinus nests in Pinus taeda plantations

    OpenAIRE

    Mariane Aparecida Nickele; Wilson Reis Filho; Edilson Batista Oliveira; Edson Tadeu Iede

    2009-01-01

    O objetivo deste trabalho foi avaliar a densidade e o tamanho dos formigueiros de Acromyrmex crassispinus, ao longo do ano, em plantios de Pinus taeda de diferentes idades. Os experimentos foram realizados, em Rio Negrinho e em Três Barras, SC, em talhões de P. taeda com diferentes idades (recém-plantado, três anos e seis anos de idade). Em cada tratamento, foram demarcadas três parcelas de 1 ha. Os formigueiros foram classificados em três classes de tamanho: classe I, até 30 cm de diâmetro; ...

  10. Desarrollo de un Adsorbente Basado en Taninos de Corteza de Pinus pinaster Development of an Adsorbent Based on Tannins from Pinus pinaster Bark

    OpenAIRE

    G. Vázquez; J. González-Álvarez; S. Freire; G. Antorrena

    2005-01-01

    Se han preparado partículas de gel de taninos de corteza de Pinus pinaster empleando un proceso en dos etapas. En la primera etapa (de pre unión cruzada), los taninos reaccionan con formaldehído. En la segunda (de granulación), la disolución taninos-formaldehído parcialmente gelificada se dispersa sobre una mezcla de decalina y un agente tensoactivo no iónico. Se ha analizado la influencia de las condiciones de operación de ambas etapas sobre el rendimiento y características de las partículas...

  11. Identification case of evidence in timber tracing of Pinus radiate, using high-resolution melting (HRM) analysis.

    Science.gov (United States)

    Solano, Jaime; Anabalón, Leonardo; Encina, Francisco

    2016-03-01

    Fast, accurate detection of plant species and their hybrids using molecular tools will facilitate assessment and monitoring of timber tracing evidence. In this study the origin of unknown pine samples is determined for a case of timber theft in the region of Araucania southern Chile. We evaluate the utility of the trnL marker region for species identification applied to pine wood based on High Resolution Melting. This efficient tracing methods can be incorporated into forestry applications such as certification of origin. The object of this work was genotype identification using high-resolution melting (HRM) and trnL approaches for Pinus radiata (Don) in timber tracing evidence. Our results indicate that trnL is a very sensitive marker for delimiting species and HRM analysis was used successfully for genotyping Pinus samples for timber tracing purposes. Genotyping samples by HRM analysis with the trnL1 approach allowed us to differentiate two wood samples from the Pinaceae family: Pinus radiata (Don) and Pseudotsuga menziesii (Mirb.) Franco. The same approach with Pinus trnL wood was not able to discriminate between samples of Pinus radiata, indicating that the samples were genetically indistinguishable, possibly because they have the same genotype at this locus. Timber tracing with HRM analysis is expected to contribute to future forest certification schemes, control of illegal trading, and molecular traceability of Pinus spp. PMID:26626827

  12. Numerical simulations of fire spread in a Pinus pinaster needles fuel bed

    International Nuclear Information System (INIS)

    The main aim of this paper is to extend the cases of WFDS model validation by comparing its predictions to literature data on a ground fire spreading in a Pinus pinaster needles fuel bed. This comparison is based on the experimental results of Mendes-Lopes and co-workers. This study is performed using the same domain as in the experiments (3.0m×1.2m×0.9m) with a mesh of 49,280 cells. We investigate the influence of wind (varied between 0 and 2 m/s) and moisture content (10 and 18%) on the rate of spread. The WFDS rate of spread is determined using a cross-correlation function of ground temperature profiles. The simulated rate of spread, as well as temperature, compared favourably to experimental values and show the WFDS model capacity to predict ground fires in Pinus Pinaster fuel beds.

  13. Photosynthetic acclimation to enriched CO{sub 2} concentrations in Pinus Ponderosa

    Energy Technology Data Exchange (ETDEWEB)

    Torres, M.P. [California State Univ., Humbolt, CA (United States)

    1995-11-01

    By the middle of the 21st century earth`s ambient CO{sub 2} level is expected to increase two-fold ({approximately}350 umol/L). Higher levels of CO{sub 2} are expected to cause major changes in the morphological, physiological, and biochemical traits of the world`s vegetation. Therefore, we constructed an experiment designed to measure the long-term acclimation processes of Pinus Ponderosa. As a prominent forest conifer, Pinus Ponderosa is useful when assessing a large scale global carbon budget. Eighteen genetically variable families were exposed to 3 different levels of CO{sub 2} (350 umol/L, 525 umol/L, 700 umol/L), for three years. Acclimation responses were quantified by assays of photosynthetic rate, chlorophyll fluorescence, and chlorophyll pigment concentrations.

  14. Development and Characterization of Nine Microsatellites for an Endangered Tree, Pinus wangii (Pinaceae

    Directory of Open Access Journals (Sweden)

    Jing-Jing Dou

    2013-02-01

    Full Text Available Premise of the study: Pinus wangii is an endemic and endangered species in southwestern China, and microsatellite primers were developed to characterize its genetic diversity and population structure. Methods and Results: Using the Fast Isolation by AFLP of Sequences Containing repeats (FIASCO protocol, nine sets of microsatellite primers were developed in P. wangii. One population with 26 individuals of P. wangii, as well as 11 individuals each for two congeneric species, P. taiwanensis and P. squamata, were used to test their polymorphism and transferability. The number of alleles per locus ranged from one to seven with an average of 3.7, and the observed heterozygosity and expected heterozygosity ranged from 0 to 0.91 and 0 to 0.75, respectively. Conclusions: We developed nine sets of polymorphic microsatellite loci that are suitable for investigating genetic diversity and population structure of P. wangii, and these markers may be useful for other Pinus species.

  15. Pinus taeda L. INITIAL GROWTH RELATED TO N, P AND K FERTILIZERS

    Directory of Open Access Journals (Sweden)

    Hamilton Luiz Munari Vogel

    2010-08-01

    Full Text Available This study aimed to evaluate the effect N, P and K on the growth of young (19 month-old Pinus taeda. The experiment took place near Cambará do Sul county, with UTM coordinates of 562125 E and 6777386 N. The statistical methodology was the confounding technique, for three factors, with four levels, totalizing 64 treatments, allocated in four blocks. The following variables were measured: total height, crown height, steam diameter and crown diameter. The results pointed out a significant linear quadratic effect for P, indicating that P fertilization is essential on the initial development of Pinus taeda plants, with a maximum cylindric volume achieved at 64 and 87 kg ha-1 doses of P2O5 and K2O respectively.

  16. Occurrence of cyclic AMP and related enzymes during germination of Pinus pinea seeds.

    Science.gov (United States)

    Martelli, P; Lusini, P; Bovalini, L; Bartali, R; Franchi, G G; Cinci, G

    1987-01-01

    The occurrence of cAMP, adenylate cyclase and cAMP phosphodiesterase has been tested in Pinus pinea seed during germination. The study has been carried out on dormant and imbibed seeds, seedlings, endospermic residues, roots and cotyledons. cAMP has been detected by the protein binding method and its occurrence has been verified by HPLC detections. cAMP phosphodiesterase shows a very high activity at acidic pH, while being completely inactive at pH 7.4. At this pH value, well detectable levels of adenylate cyclase have been observed. Therefore, the classical pathway of synthesis and breakdown of cAMP, already accepted for animal and bacterial cells, seems to be operating in Pinus pinea plant too. PMID:3038780

  17. Discussion on Pipe Model through Hydraulic Architecture of Pinus tabulaeformis Seedling

    Institute of Scientific and Technical Information of China (English)

    ZHAIHongbo; LIJiyue; NIELishui

    2004-01-01

    In the paper, the hydraulic architecture parameters of Pinus tabulaeformis seedlings (4 years old) were measured by improved flushing method under normal water condition in the green house and the basic theory of hydraulic architecture is used to discuss the rationality of the pipe model. The results of the experiment and simulation show that the differences of hydraulic conductivity, specific conductivity and leaf specific conductivity is great in different stems and branches of Pinus tabulaeformis seedlings. The hydraulic conductivity of non-constriction area is higher than that of constriction area. The devotion of functional xylem of stem to unit leaf growth is not a constant, namely, the Huber value is diverse. Even though the pipe model has been accepted in some areas, its precondition is not perfect, and it is helpless in correctly understanding the essence of water transport in seedlings from the prospective of water physiology.

  18. Voltammetric analysis of Pinus needles with physiological, phylogenetic, and forensic applications.

    Science.gov (United States)

    Ortiz-Miranda, Annette S; König, Peter; Kahlert, Heike; Scholz, Fritz; Osete-Cortina, Laura; Doménech-Carbó, María Teresa; Doménech-Carbó, Antonio

    2016-07-01

    Polyphenolic compounds are electrochemically active components of vegetal matter which were targeted under simple experimental conditions to produce voltammetric profiles characterizing the metabolite composition. Application to bivariate and multivariate chemometric techniques permits to discriminate the species and age of plant leaves, illustrated here for the case of six Pinus species from two different subgenera. Such responses, associated with the electrochemical oxidation of polyphenolic compounds (quercetin, gallic acid, ellagic acid, among others), define a voltammetric profile which varies systematically with the age of the leaves for the different species. The application of this methodology for phylogenetic studies, plant physiology, forensic science, and chemoecology is discussed. Graphical Abstract Image of Pinus in a typical Mediterranean forest; Courtesy of the Botanic Garden of the University of Valencia. PMID:27173392

  19. Vegetation control and fertilization in midrotation Pinus taeda stands in the southeastern United States

    OpenAIRE

    Albaugh, Timothy; Lee Allen, H.; Zutter, Bruce; Quicke, Harold

    2003-01-01

    - Contrôle de la végétation et fertilisation de peuplements de Pinus taeda à mi-révolution dans les états du Sud-Est des USA. Nous avons évalué l'effet sur des plantations de Pinus taeda L. de différentes méthodes de contrôle de la végétation (VC) à savoir des traitements chimiques (glyphosate, imazapyr, metsulfuron, methyl et triclopyr) , des interventions mécaniques et une fertilisation phosphatée, ceci sur un ensemble de stations situées en plaine et en piedmont des Etats du Sud Ouest, por...

  20. Chemical composition and antimicrobial activity of the essential oils of Pinus pinaster

    Directory of Open Access Journals (Sweden)

    Nouara Ait Mimoune

    2013-08-01

    Full Text Available Objective: To investigate the antimicrobial activity and chemical composition of essential oils of Pinus pinaster. Methods: Essential oils were extracted from the needles by hydrodistillation. The chemical composition of the obtained essential oils was analyzed using GC-MS technique. The antimicrobial potential has been tested against six microorganisms performing the disc diffusion assay. Results: Twenty-three components have been identified. β-caryophyllene (30.9% and β-selinene (13.45% were predominant compounds. The essential oil exhibited a moderate activity against Staphylococcus aureus, Bacillus subtilis and Escherichia coli, but did not affect the growth of Erwinia amylovora. Aspergillus flavus and Aspergillus niger were not inhibited by maritime pine essential oils. Conclusions: The essential oils from Pinus pinaster can be used as an antibacterial agent.

  1. Effects of silviculture treatments on vegetation after fire in Pinus halepensis Mill. woodlands (SE Spain)

    OpenAIRE

    Jorge De Las Heras,; González-Ochoa, Ana; López-Serrano, Francisco; Simarro, María

    2004-01-01

    Effets des traitements sylvicoles sur la végétation après un feu dans des forêts de Pinus halepensis Mill. (sud-est de l'Espagne). En août 1994, deux grands feux se sont produits dans le sud-est de l'Espagne et ont brûlé 44000 ha de forêt de Pinus halepensis Mill. adultes. Après le feu, il y a eu une régénération intense de la forêt qui a formé des bosquets touffus de plantules. On a alors procédé à des études sur la régénération naturelle du pin en appliquant différents traitements sylvicole...

  2. HEAVY METAL LEVELS IN PINE (Pinus eldarica Medw. TREE BARKS AS INDICATORS OF ATMOSPHERIC POLLUTION

    Directory of Open Access Journals (Sweden)

    Behrouz Kord

    2011-04-01

    Full Text Available Bio-monitoring of air quality in TehranCity was investigated by analyzing 36 pine tree (Pinus eldarica Medw. barks. The samples were taken from different locations with different degrees of metal pollution (urban, industrial, highway, and control sites. Then, the concentrations of lead (Pb, zinc (Zn, copper (Cu, nickel (Ni, and chromium (Cr were measured using a flame atomic absorption spectrophotometer. The results of this study showed that the highest and lowest metal concentrations were found in the heavy traffic sites and the control site, respectively. Lead content was found to be the highest in high traffic density areas. The industrial part of the city was characterized by high Zn, Cr, and Ni contents. Variation in heavy metal concentrations between sites was observed and attributed to differences in traffic density and anthropogenic activities. The research also confirms the suitability of Pinus eldarica Medw barks as a suitable bio-indicator of aerial fallout of heavy metals.

  3. Resistance to water stress in seedlings of eight European provenances of Pinus halepensis Mill.

    OpenAIRE

    Calamassi, Roberto; Della Rocca, Gianni; Falusi, Mauro; Paolettiinstb, Elena; Strati, Sara

    2001-01-01

    Résistance au stress hydrique des plantules appartenant à huit provenances européennes de Pinus halepensis Mill. Sur des plantules âgées de 24 semaines, appartenant à 8 provenances de Pinus halepensis (Mill.) subsp. halepensis, des courbes pression-volume ont été effectuées après une semaine de stress hydrique (-0,033, -0,4, -0,8, -1,2, -1,6 MPa). P. halepensis a montré des ajustements osmotiques en réponse au stress hydrique, bien que de façon différenciée parmi les provenances. L'eau apopla...

  4. Xylem acoustic signals from mature Pinus sylvestris during an extended drought

    OpenAIRE

    Perks, Michael; Irvine, James; Grace, John

    2004-01-01

    Signaux acoustiques du xylem chez des Pinus sylvestris matures soumis à une sécheresse prolongée. Des pins sylvestres matures (Pinus sylvestris) ont été soumis à partir de novembre 1994 et pendant 11 mois à une sécheresse artificielle du sol. Des placeaux témoins ont bénéficié de la pluie et d'un supplément d'eau sous forme d'irrigation. On a comparé l'importance de la cavitation dans le xylème des branches et des fûts par des mesures d'émission acoustique ultrasonique (UAE). On a également e...

  5. Niche of insect borers within Pinus massoniana infected by pine wood nematode

    Institute of Scientific and Technical Information of China (English)

    SONG Jiying; LUO Youqing; SHI Juan; YAN Xiaosu; CHEN Weiping; JIANG Ping

    2006-01-01

    In November 2003 and June 2004,the insect borers and their spatial distribution within Pinus massoniana were investigated in Zhoushan City,in East China's Zhejiang Province,where pine wood nematode (Bursaphelenchus xylophilus) are typically found.The niche width,proportional similarity of niche and the niche overlap of dominant species of dying trees were computed.Results show that five insect species infect and damage Pinus massoniana,which had been infected by pine wood nematodes,among which four are wood boring beetles and one termite.Species within host trees vary from winter to summer and all the species have their own niche width,proportional similarity of niche and the niche overlap.They can achieve competitive equilibrium and coexistence according to their biological characteristics and life habits.

  6. EFFECTS OF BELT SPEED, PRESSURE AND GRIT SIZE ON THE SANDING OF Pinus elliottii WOOD

    OpenAIRE

    Manoel Cléber de Sampaio Alves; Luiz Fernando Frezzatti Santiago; Marcos Tadeu Tiburcio Gonçalves; Ivaldo De Domênico Valarelli; Francisco Mateus Faria de Almeida Varasquim

    2015-01-01

    The present paper aims to evaluate the influence of the factors (belt speed, pressure and grit size) on the output parameters (temperature and surface roughness) for Pinus elliottii wood sanding, processed parallel to the fibers. Three levels of belt speed, three levels of pressure and four levels of grit size were employed, with six replicates for each process, totaling 216 observations. The experiment conducted under a randomized complete block design (RCBD). The results were...

  7. Horse grazing systems: understory biomass and plant biodiversity of a Pinus radiata stand

    OpenAIRE

    Antonio Rigueiro-Rodríguez; Rabia Mouhbi; José Javier Santiago-Freijanes; María del Pilar González-Hernández; María Rosa Mosquera-Losada

    2012-01-01

    Horse grazing systems may affect productivity and biodiversity of understory developed under Pinus radiata D. Don silvopastoral systems, while acting as a tool to reduce the risk of fire. This study compared continuous and rotational grazing systems effect upon biomass, fractions of stem, sprouts, leaves and woody parts of Ulex europaeus L. and alpha (Species Richness, Shannon-Wiener) and beta (Jaccard and Magurran) biodiversity for a period of four years in a P. radiata silvopastoral system....

  8. Drought resistance of Pinus sylvestris seedlings conferred by plastic root architecture rather than ectomycorrhizal colonisation

    OpenAIRE

    Moser, Barbara; Kipfer, Tabea; Richter, Sarah; Egli, Simon; Wohlgemuth, Thomas

    2015-01-01

    Abstract ContextIncreased summer drought is considered as a threat to the regeneration of Pinus sylvestris in the Central Alps. To a certain degree, seedlings are able to mitigate negative effects of drought by altering root/shoot ratios. But, seedlings may also enhance access to water and nutrients by cooperation with ectomycorrhizal fungi. AimsWe tested the importance of both mechanisms for drought resistance of P. sylvestris seedlings during early establishment and assessed whether differe...

  9. Effect of irradiation on seed germination and seedling growth of Pinus armandi Franch

    International Nuclear Information System (INIS)

    The soaking seeds of Pinus armandi Franch. were irradiated with 60Co γ-ray at dose of 0, 20, 40, 60 and 80 Gy, and the treated seeds were planted. The result showed that the irradiation treatment retarded the time of germination, and the seed germination rate, for reduced, the ratio of yellow to living seedlings. The treatment also lowered the height of seeding, especially for the yellow seedlings. (authors)

  10. Characterization and mapping of QTL used in breeding of Scots pine (Pinus sylvestris L.)

    OpenAIRE

    Nowicka, Aleksandra; Ukalska, Joanna; Simińska, Joanna; Szyp-Borowska, Iwona

    2013-01-01

    This paper reports the construction a map based on Amplified Fragment Length Polymorphic DNA (AFLP) in Scots pine (Pinus sylvestris L.). The main purpose of map construction was its application to quantitative traits loci (QTL) mapping for breeding traits economically important in Scots pine breeding program such as tree height and diameter at breast height, number of needles and their length, width, and area. Genomic DNA of needles and haploid megagamethophytes from seeds originating from a ...

  11. The effects of fire severity on ectomycorrhizal colonization and morphometric features in Pinus pinaster Ait. seedlings

    OpenAIRE

    Pablo Vásquez-Gassibe; Juan-Andrés Oria-de-Rueda; Luis Santos-del-Blanco; Pablo Martín-Pinto

    2016-01-01

    Aim of the study: Mycorrhizal fungi in Mediterranean forests play a key role in the complex process of recovery after wildfires. A broader understanding of an important pyrophytic species as Pinus pinaster and its fungal symbionts is thus necessary for forest restoration purposes. This study aims to assess the effects of ectomycorrhizal symbiosis on maritime pine seedlings and how fire severity affects fungal colonization ability.Area of study: Central Spain, in a Mediterranean region typical...

  12. Controlling water dynamics in Scots pine (Pinus sylvestris L.) seeds before and during seedling emergence

    OpenAIRE

    Pamuk, Gunnar Sven

    2004-01-01

    This doctoral thesis examines if water dynamics before and during seedling emergence after autumn and summer direct seeding can be controlled in Scots pine (Pinus sylvestris L.) seeds by hydrophobic polymer coating and hydrophilic (hydrogels) polymer packages. A method was created by using scanning electron microscopy (SEM) to evaluate the quality of the polymer seed coating. Differential scanning calorimetry (DSC) and germination tests indicated that the critical moisture content of Scots pi...

  13. Larvicidal and mosquito repellent activities of Pine (Pinus longifolia, Family: Pinaceae) oil

    OpenAIRE

    M.A. Ansari, P.K. Mittal, R.K. Razdan & U. Sreehari

    2005-01-01

    Background & objectives: Various plant-based products are safe and biodegradable alternatives tosynthetic chemicals for use against mosquitoes. Oil of Pinus longifolia is traditionally used forprotection against mosquitoes in some rural areas but there is no documented report of its use againstmosquitoes. The present study was undertaken to scientifically evaluate the activity of Pine oilagainst mosquitoes.Methods: The oil was procured from the market and its contents were chemically analysed...

  14. Accelerated artificial aging of particleboards from residues of CCB treated Pinus sp. and castor oil resin

    OpenAIRE

    Marília da Silva Bertolini; Francisco Antonio Rocco Lahr; Maria Fátima do Nascimento; José Augusto Marcondes Agnelli

    2013-01-01

    Tests simulating exposure to severe weather conditions have been relevant in seeking new applications for particleboard. This study aimed to produce particleboards with residues of CCB (chromium-copper-boron oxides) impregnated Pinus sp. and castor oil-based polyurethane resin, and to evaluate their performance before and after artificial accelerated aging. Panels were produced with different particle mass, resin content and pressing time, resulting eight treatments. Particles moisture and si...

  15. Effects of Ectomycorrhizal Fungi on Growth of Seedlings of Pinus densiflora

    OpenAIRE

    Sim, Mi-Yeong; Eom, Ahn-Heum

    2006-01-01

    This study was conducted to investigate the different effects of ectomycorrhizal fungal (ECMF) species on the growth of seedlings of Pinus densiflora, and the effects of ECMF diversity on plant productivity. A total of five species of ECMF were isolated from root tips of pine seedlings collected from Mt. Songni and used as inocula. Pots containing pine seedlings were inoculated with either a single ECMF species or a mixture of five ECMF species. All of the seedlings formed ECM on their roots ...

  16. Sustained in vitro root development obtained in Pinus pinea inoculated with ectomycorrhizal fungi.

    OpenAIRE

    Oliveira, Paulo; Barriga, João; Cavaleiro, Cremilde; Peixe, Augusto; Zavattieri, Amely

    2003-01-01

    Stone pine (Pinus pinea L.) is an economically important forest tree in Mediterranean climates and has been the target for selection efforts through micropropagation. Previous attempts on microshoots, derived from mature seed cotyledons, reached incipient rooting after induction with a combination of auxin and hypertonic shock, but their development in vitro was not sustained. At this stage, co-culturing plantlets with some fungi isolated from ectomycorrhizas succeeded in over...

  17. Exploring lignification in conifers by silencing hydroxycinnamoyl-CoA:shikimate hydroxycinnamoyltransferase in Pinus radiata

    OpenAIRE

    Wagner, Armin; Ralph, John; Akiyama, Takuya; Flint, Heather; Phillips, Lorelle; Torr, Kirk; Nanayakkara, Bernadette; Te Kiri, Lana

    2007-01-01

    The enzyme hydroxycinnamoyl-CoA:shikimate hydroxycinnamoyltransferase (HCT) is involved in the production of methoxylated monolignols that are precursors to guaiacyl and syringyl lignin in angiosperm species. We identified and cloned a putative HCT gene from Pinus radiata, a coniferous gymnosperm that does not produce syringyl lignin. This gene was up-regulated during tracheary element (TE) formation in P. radiata cell cultures and showed 72.6% identity to the amino acid sequence of the Nicot...

  18. Pinewood Nematode, Bursaphelenchus xylophilus, Associated with Red Pine, Pinus resinosa, in Western Maryland

    OpenAIRE

    Harman, Amy L.; Krusberg, Lorin R.; Nickle, William R.

    1986-01-01

    Red pines Pinus resinosa in Garrett and Allegany counties, Maryland, were examined during 1982-84 to determine distribution of the pinewood nematode, Bursaphelenchus xylophilus, within and among trees. Approximately 25-year-old (younger) and 47-year-old (older) trees were subdivided into the following categories: 1) trees with mostly green needles; 2) trees with mostly reddish-brown needles; 3) trees lacking needles but with bark intact; 4) trees lacking both needles and bark; and 5) trees wi...

  19. Addressing post-transplant summer water stress in Pinus pinea and Quercus ilex seedlings

    OpenAIRE

    Pardos M; Calama R; Mayoral C; Madrigal G; Sánchez-González M

    2015-01-01

    In central Spain, post-transplant water stress produces high seedling mortality after the first summer following outplanting. Our study was designed to determine whether survival and performance of outplanted stone pine (Pinus pinea) and holm oak (Quercus ilex) seedlings in a burned area could be improved by summer irrigation and mulching and to identify whether there is a species-specific adaptive capacity to respond to treatment and environment. Seedlings were outplanted in March 2011 in 20...

  20. Regeneration of a Coastal Pine (Pinus thunbergii Parl.) Forest 11 Years after Thinning, Niigata, Japan

    OpenAIRE

    Jiaojun Zhu; Yutaka Gonda; Lizhong Yu; Fengqin Li; Qiaoling Yan; Yirong Sun

    2012-01-01

    To examine the effects of thinning intensity on wind vulnerability and regeneration in a coastal pine (Pinus thunbergii) forest, thinning with intensities of 20%, 30% and 50% was conducted in December 1997; there was an unthinned treatment as the control (total 8 stands). We re-measured the permanent sites to assess the regeneration characteristics 11 years after thinning. In the 50% thinned stand, seedlings aged from 2 to 10 years exhibited the highest pine seedling density and growth. The a...

  1. Seedling emergence and establishment of Pinus sylvestris in the Mongolian forest-steppe ecotone

    OpenAIRE

    Dulamsuren, Choimaa; Hauck, Markus; Leuschner, Christoph

    2012-01-01

    The potential of Scots pine (Pinus sylvestris) for regeneration and encroachment onto dry grasslands in the forest-steppe ecotone was experimentally studied at the south-eastern distribution limit of the species in Mongolia. The experiment consisted of a sowing and planting (2-year old seedlings) assay at two different distances from the forest line and manipulation of the water supply by irrigation in one half of the replicate plots. Seedling emergence was strongly inhibited by post-dispersa...

  2. Edaphic characteristics of Austrian pine (Pinus nigra Arn.) forests in the Višegrad area

    OpenAIRE

    Blagojević Velibor D.; Knežević Milan N.; Košanin Olivera D.; Kapović-Solomun Marijana B.; Lučić Radovan J.; Eremija Saša M.

    2016-01-01

    This paper presents the results of soil research in Austrian pine (Pinus nigra Arn.) forest communities in the Višegrad area, carried out to determine the basic soil characteristics and eco-production potential of forest habitats as an important basis and framework for the successful management of these forests on the principles of sustainable development. Austrian pine forests in this region are an important and ecologically valuable community. The complex...

  3. Quantification and Physiology of Carbon Dynamics in Intensively Managed Loblolly Pine (Pinus taeda L.)

    OpenAIRE

    Gough, Christopher Michael

    2003-01-01

    Loblolly pine (Pinus taeda L.) occupies 13 million hectares in the United States and represents a critical component of the global carbon (C) cycle. Forest management alters C dynamics, affecting the C sequestration capacity of a site. Identifying drivers that influence C cycling, quantifying C fluxes, and determining how management alters processes involved in C cycling will allow for an understanding of C sequestration capacity in managed forests. Objectives of the first study included (...

  4. Effect of two successive wildfires in Pinus halepensis stands of central Greece

    OpenAIRE

    Goudelis, G.; P. Ganatsas; T. Tsitsoni; Y. Spanos; E. Daskalakou

    2008-01-01

    We estimated differences, five years after a wildfire, in soil and vegetation between Pinus halepensis stands that were once burnt (1998) and stands that were burnt twice in a short time interval (1995 and 1998), in the area of Penteli, central Greece. The parameters monitored were the physical and chemical attributes of upper soil layer and the vegetation composition, density and height. The results showed that five years after the wildfire, soil pH did not differ be...

  5. Impact of Seed Transmission on the Infection and Development of Pitch Canker Disease in Pinus radiata

    OpenAIRE

    Margarita Evira-Recuenco; Eugenia Iturritxa; Rosa Raposo

    2015-01-01

    The aim of this study was to determine the impact of seed inoculum on subsequent disease development in nurseries, specifically studying incidence of seed infection, transmission rate of seed to seedlings, and rate of disease development from the primary inoculum source. Transmission rate of Fusarium circinatum (F. circinatum) from symptomatic trees of Pinus radiata (P. radiata) to seed was 0.73%, being the fungus mainly on the coat. Seed infection incidence was positively correlated with tre...

  6. Dichotomization of mycorrhizal and NPA-treated short roots in Pinus sylvestris

    OpenAIRE

    Raudaskoski, Marjatta; Salo, Vanamo

    2008-01-01

    Conifers like Scots pine (Pinus sylvestris) have a complicated root system consisting of morphologically and anatomically different root types, of which the short roots have a very limited ability to elongate. Short roots have an important role in nature since they are able to establish ectomycorrhizal symbiosis, in which the growth of fungal mycelium between the epidermal cells and in the intercellular space between cortical cells leads to formation of dichotomous short roots, which may, thr...

  7. Transcriptional analysis of Pinus sylvestris roots challenged with the ectomycorrhizal fungus Laccaria bicolor

    OpenAIRE

    Sederoff Ron; van Zyl Len; Osborne Jason; Li Guosheng; Adomas Aleksandra; Heller Gregory; Finlay Roger D; Stenlid Jan; Asiegbu Frederick O

    2008-01-01

    Abstract Background Symbiotic ectomycorrhizal associations of fungi with forest trees play important and economically significant roles in the nutrition, growth and health of boreal forest trees, as well as in nutrient cycling. The ecology and physiology of ectomycorrhizal associations with Pinus sp are very well documented but very little is known about the molecular mechanisms behind these mutualistic interactions with gymnosperms as compared to angiosperms. Results Using a micro-array appr...

  8. Pinus pinaster seedlings and their fungal symbionts show high plasticity in phosphorus acquisition in acidic soils

    OpenAIRE

    Ali, M. A.; Louche, Julien; Legname, Elvira; M. Duchemin; Plassard, Claude

    2009-01-01

    Young seedlings of maritime pine (Pinus pinaster Soland in At.) were grown in rhizoboxes using intact spodosol soil samples from the southwest of France, in Landes of Gascogne, presenting a large variation of phosphorus (P) availability. Soils were collected from a 93-year-old unfertilized stand and a 13-year-old P. pinaster stand with regular annual fertilization of either only P or P and nitrogen (N). After 6months of culture in controlled conditions, different morphotypes of ectomycorrhiza...

  9. EFFECT OF THE SPECIFIC GRAVITY ON STATIC BENDING PROPERTIES IN PLYWOOD OF Pinus elliotti Engelm

    OpenAIRE

    Hernando Alfonso Lara Palma

    2009-01-01

      The objetive of this work was to determine the relation between the rigidity and strength properties in static bending and specifie gravity of plywood manufactured from five veneer of Pinus elliotti Engelm, plantation from a 30 year-old. Linear simples, multiple and polynomial relations involving the modulus of rupture (MOR), modulus of elasticity (MOE), strees at proportional limit (TLP) and specifie gravity (Me) of the plywood were studied. The specifie gravity did not prove to be a very ...

  10. Produção de compensados de Pinus taeda L. E Pinus oocarpa Schiede com diferentes formulações de adesivo uréia formaldeído Plywood manufacturing from Pinus elliottii L. and Pinus oocarpa Schiede with different formulations of the urea-formaldheyde resin

    Directory of Open Access Journals (Sweden)

    Setsuo Iwakiri

    2002-05-01

    Full Text Available Este trabalho teve como objetivo avaliar a qualidade de painéis compensados de Pinus taeda e de Pinus oocarpa, com 20 e 24 anos de idade, respectivamente, utilizando três diferentes formulações de adesivo uréia-formaldeído. Foram produzidos 18 painéis, com três repetições por tratamento. As formulações com maior proporção relativa de resina não influenciaram de forma conclusiva as propriedades físico-mecânicas dos painéis.Os painéis de P. oocarpa apresentaram valores médios de resistência da linha de cola, módulos de elasticidade e de ruptura superiores àqueles dos painéis de P. taeda. Os resultados das propriedades físico-mecânicas dos painéis indicaram grande potencial de utilização de lâminas de P. oocarpa para produção de compensados.The objective of this study was to evaluate the quality of both Pinus taeda and Pinus oocarpa plywood, 20 and 24-years-old, respectively, using three different formulations of urea formaldheyde resin. A total of 18 boards were produced, using three repetitions per treatment. The formulations containing a high relative proportion of the resin did not show a conclusive influence on the physical and mechanical properties of the boards. The boards made from P. oocarpa showed higher average values of the glue line strength, modulus of elasticity and modulus of rupture in comparison to boards of P. taeda. The results showed that the evaluation of the physical and mechanical properties of the board, indicate that the veneers of P. oocarpa have a high potentiality for plywood production.

  11. Peculiarities of Pinus sylvestris seedling growth under the effect of radiation

    International Nuclear Information System (INIS)

    The growth of Pinus sylvestris seedlings was delayed and poystem occurrence increased with chronic irradiation (a cumulative dose of external γ-radiation was 6-8 Gy in 1986 and 0.7 Gy in 1990). The apical meristem activity was inhibited and central stem and main root died off under the effect of the radiation doses applied resulting in the development of plants of a specific floating form

  12. Anthracological evidence suggests naturalness of Pinus pinaster in inland southwestern Iberia

    OpenAIRE

    Rubiales Jimenez, Juan Manuel; Garcia-Amorena Gomez del Moral, Ignacio; García Álvarez, Salvia; Morla Juaristi, Carlos

    2009-01-01

    The study of well-preserved archaeological charcoals in the pre-Roman Iron Age settlement of Castillejos II (Badajoz, Spain) is used to reconstruct environmental conditions and land-use practices in vegetation landscapes in the southwest of the Iberian Peninsula before the arrival of Roman civilization. The results support that, while evergreen Quercus forests dominated during the Holocene, Pinus pinaster existed as a natural element of southwestern Iberian Peninsula vegetation. Although its ...

  13. Fertilization and allelopathy modify Pinus halepensis saplings crown acclimation to shade

    OpenAIRE

    Monnier, Y.; Vila, B.; Bousquet-Mélou, A.; Prévosto, B.; Fernandez, C

    2011-01-01

    Pinus halepensis Mill. is a Mediterranean pioneer forest species with shade intolerance features. The purpose of this study is to better understand how stand fertility and allelopathic properties of adult trees influence shade acclimation of saplings. Crown growth and morphological plasticity were studied under different light, fertilization, and allelopathic conditions in a nursery experiment. We tested whether shade-acclimation capacity increases with fertilization, and is affected by autot...

  14. Evaluacion de la probabilidad de ocurrencia de fuegos en rodales de Pinus pinaster Ait en Portugal

    OpenAIRE

    Marques, S.; Garcia-Gonzalo, J; Botequim, B.; Ricardo, A.; J.G. Borges; Tomé, Margarida; De Oliveira, M M

    2012-01-01

    Maritime pine (Pinus pinaster Ait.) is an important conifer from the western Mediterranean Basin extending over 22% of the forest area in Portugal. In the last three decades nearly 4% of Maritime pine area has been burned by wildfires. Yet no wildfire occurrence probability models are available and forest and fire management planning activities are thus carried out mostly independently of each other. This paper presents research to address this gap. Specifically, it presents a model ...

  15. Assessing wildfire risk probability in Pinus pinaster Ait. stands in Portugal.

    OpenAIRE

    Marques, Susete; Botequim, Brigite; Garcia-Gonzalo, Jordi; Borges, José Guilherme; Tomé, Margarida; Oliveira, Manuela

    2012-01-01

    Maritime pine (Pinus pinaster Ait.) is an important conifer from the western Mediterranean Basin extending over 22% of the forest area in Portugal. In the last three decades nearly 4% of Maritime pine area has been burned by wildfires. Yet no wildfire occurrence probability models are available and forest and fire management planning activities are thus carried out mostly independently of each other. This paper presents research to address this gap. Specifically, it presents a model ...

  16. Evaporation from Scots pine (Pinus sylvestris) following natural re-colonisation of the Cairngorm mountains, Scotland

    OpenAIRE

    Haria, Atul H.; Price, David J.

    2000-01-01

    Recently, changing land-use practices in the uplands of Scotland have resulted in increased re-colonisation of wet heath moorland by natural Scots pine (Pinus sylvestris) woodland. The simple semi-empirical water use model, HYLUC, was used to determine the change in water balance with increasing natural pine colonisation. The model worked well for 1996. However, values of soil moisture deficit simulated by HYLUC diverged significantly from measurements in 1997 when rainfall ...

  17. Evaporation from Scots pine (Pinus sylvestris) following natural re-colonisation of the Cairngorm mountains, Scotland

    OpenAIRE

    Haria, Atul H.; Price, David J.

    2000-01-01

    Recently, changing land-use practices in the uplands of Scotland have resulted in increased re-colonisation of wet heath moorland by natural Scots pine (Pinus sylvestris) woodland. The simple semi-empirical water use model, HYLUC, was used to determine the change in water balance with increasing natural pine colonisation. The model worked well for 1996. However, values of soil moisture deficit simulated by HYLUC diverged significantly from measurements in 1997 when rainfall quantity and inten...

  18. Bending creep of Maritime pine wood (Pinus pinaster Ait.) chemically modified

    OpenAIRE

    Lopes, Duarte Barroso; Mai, Carsten; Militz, Holger

    2013-01-01

    The long-term performance of a structural member is determined by its durability and deformation with time. The bending creep behaviour of modified wood was assessed experimentally over a period of 35 days (840 hours). Four chemical modification processes were used: 1,3-dimethylol-4,5-dihydroxyethyleneurea (DMDHEU), mmethylated melamine formaldehyde resin (MMF), tetraethoxysilane (TEOS) and amid wax (WA). Wood stakes with 20.10.200 mm RTL dimensions of Portuguese Maritime pine (Pinus pi...

  19. Micropropagation of a recalcitrant pine (Pinus pinea L.): An overview of the effects of ectomycorrhizal inoculation

    OpenAIRE

    Ragonezi, C.; Caldeira, A. T.; Martins, M. R.; Teixeira, D.; Dias, L.S.; Miralto, O.; Ganhão, E.; Klimaszewska, K.; Zavattieri, A.

    2013-01-01

    Stone pine (Pinus pinea L.) is an economically important forest species in some regions of Iberian Peninsula. Portugal and Spain have nearly 500,000 ha of stone pine stands, representing 85% of worldwide distribution. The main use of this species is for the production of seeds (pinion) for food industry. In addition to its enormous profitability as a producer of seeds, it has beneficial impact on soil protection, dunes fixation and is a pioneer species particularly for cork and holm oaks degr...

  20. Efficacy of sulfuryl fluoride against the pinewood nematode, Bursaphelenchus xylophilus (Nematoda: Aphelenchidae), in Pinus pinaster boards

    OpenAIRE

    Bonifacio, Luis; Sousa, Edmundo; Naves, Pedro; Inácio, Maria; Henriques, Joana; Mota, Manuel; Barbosa, Pedro; Drinkall, Mike; Buckley, Stanislas

    2014-01-01

    BACKGROUND: The pinewood nematode (PWN) Bursaphelenchus xylophilus is an important conifer disease worldwide. It is the direct cause of the death of millions of pines in south-east Asia (mainly Japan, China and Korea) and has been established in Portugal since 1999. The phasing out of methyl bromide has created an urgent need for alternative treatment of wood packaging materials. The effect of sulfuryl fluoride (SF), a broad-spectrum fumigant used to control insects, was tested in Pinus pinas...

  1. Application of gamma radiation to the nodes detection in Pinus Radiata (D.Don) wood pieces

    International Nuclear Information System (INIS)

    Attenuation of 59.5 KeV photons provided by an Am-241 source, has been used to detect knots in lumber pieces from Pinus Radiata (D.Don). It is shown that the linear attenuation coefficient is a sensitive parameter to detect singularities in the structure of this material. The scanning of the piece provides profiles which define the position and extension of the singularity. (author)

  2. Changes of Morphogenic Competence in Mature Pinus sylvestris L. Buds in vitro

    OpenAIRE

    ANDERSONE, UNA; IEVINSH, GEDERTS

    2002-01-01

    The effects of season and cold storage on morphogenic competence in mature Pinus sylvestris buds were investigated. Peroxidase and polyphenol oxidase activity were measured as markers of oxidative metabolism. No growth in vitro was observed on explants detached from the end of January until the beginning of March. Brachioblasts, each with a couple of needles, formed on 11 % of the buds without macrostrobili that were detached in early April and introduced immediately into culture. Of the expl...

  3. Invasive behaviour of white pine (Pinus strobus) in sandstone areas in the Czech Republic

    Czech Academy of Sciences Publication Activity Database

    Hadincová, Věroslava; Köhnleinová, I.; Marešová, Jana

    Praha: Academia, 2007 - (Hartel, H.; Cílek, V.; Herben, T.; Jackson, A.; Williams, R.), s. 219-224 ISBN 978-80-200-1577-8 R&D Projects: GA ČR(CZ) GA526/05/0430 Institutional research plan: CEZ:AV0Z60050516; CEZ:AV0Z80330511 Keywords : invasions * Pinus strobus * species composition Subject RIV: EF - Botanics

  4. Chloroplast evolution in the Pinus montezumae complex: a coalescent approach to hybridization.

    Science.gov (United States)

    Matos, J A; Schaal, B A

    2000-08-01

    This study addresses the evolutionary history of the chloroplast genomes of two closely related pine species, Pinus hartwegii Lindl. and P. montezumae Lamb (subsect. Ponderosae) using coalescent theory and some of the statistical tools that have been developed from it during the past two decades. Pinus hartwegii and P. montezumae are closely related species in the P. montezumae complex (subsect. Ponderosae) of Mexico and Central America. Pinus hartwegii is a high elevation species, whereas P. montezumae occurs at lower elevations. The two species occur on many of the same mountains throughout Mexico. A total of 350 individuals of P. hartwegii and P. montezumae were collected from Nevado de Colima (Jalisco), Cerro Potosí (Nuevo León), Iztaccihuatl/Popocatepetl (México), and Nevado de Toluca (México). The chloroplast genome of P. hartwegii and P. montezumae was mapped using eight restriction enzymes. Fifty-one different haplotypes were characterized; 38 of 160 restriction sites were polymorphic. Clades of most parsimoniously related chloroplast haplotypes are geographically localized and do not overlap in distribution, and the geographically localized clades of haplotypes include both P. hartwegii and P. montezumae. Some haplotypes in the clades occur in only one of the two species, whereas other haplotypes occur in both species. These data strongly suggest ancient and/or ongoing hybridization between P. hartwegii and P. montezumae and a shared chloroplast genome history within geographic regions of Mexico. PMID:11005290

  5. Dissipation of excess excitation energy of the needle leaves in Pinus trees during cold winters

    Science.gov (United States)

    Zhang, AO; Cui, Zhen-Hai; Yu, Jia-Lin; Hu, Zi-Ling; Ding, Rui; Ren, Da-Ming; Zhang, Li-Jun

    2016-05-01

    Photooxidative damage to the needle leaves of evergreen trees results from the absorption of excess excitation energy. Efficient dissipation of this energy is essential to prevent photodamage. In this study, we determined the fluorescence transients, absorption spectra, chlorophyll contents, chlorophyll a/b ratios, and relative membrane permeabilities of needle leaves of Pinus koraiensis, Pinus tabulaeformis, and Pinus armandi in both cold winter and summer. We observed a dramatic decrease in the maximum fluorescence (F m) and substantial absorption of light energy in winter leaves of all three species. The F m decline was not correlated with a decrease in light absorption or with changes in chlorophyll content and chlorophyll a/b ratio. The results suggested that the winter leaves dissipated a large amount of excess energy as heat. Because the cold winter leaves had lost normal physiological function, the heat dissipation depended solely on changes in the photosystem II supercomplex rather than the xanthophyll cycle. These findings imply that more attention should be paid to heat dissipation via changes in the photosystem complex structure during the growing season.

  6. THE EFFECT OF Eucalyptus APMP FIBERS REINFORCEMENT ON Pinus radiata KRAFT PULP PROPERTIES

    Directory of Open Access Journals (Sweden)

    Mauro Manfredi

    2008-06-01

    Full Text Available Kraft pulps derived from pine species are largely used for high strength paper products. The quality of such pulps hasbeen improved significantly in the last decades through advances in wood quality and adequate choice of pine species. The quality ofpine fibers can be further improved by incorporating other fibers to them. In fact, the mixture of pine fibers with hardwood fibers iscommon practice around the world. An alternative to further improve the quality of pine fibers is by mixing them with wood fibersproduced by modern techniques. This study evaluated the impact of mixing 10-40% of eucalyptus wood fibers produced by the P-RCAPMP process on the Pinus radiata fiber properties. The pulp mixes were beat in a PFI mill and evaluated for the main physicalproperties. It was observed that the eucalyptus wood fibers improve the bonding capacity of the Pinus radiata fibers. At a given tensilestrength, the properties of tear index and opacity of the pulp mix increase with increasing proportion of eucalyptus wood fibers. It isconcluded that addition of up to 30% eucalyptus wood fibers to Pinus radiata kraft pulp is viable alternative to improve some of itsproperties.

  7. [Major features of decline of Pinus sylvestris var. mongolica plantation on sandy land].

    Science.gov (United States)

    Wu, Xiangyun; Jiang, Fengqi; Li, Xiaodan; Xue, Yang; Qiu, Sufen

    2004-12-01

    In view of the decline of man-made sand-fixation forest of Pinus sylvestris var. mongolica in Zhanggutai sand land of Liaoning Province, this paper studied the major characteristics of the decline. The appearance of the declining man-made sand-fixation forest of Pinus sylvestris var. mongolica was grey green, its needle leaf was very thin, the blooming and fruiting rate was low, the average quantity of cones per tree was only 10.4-16.5, with only 6.96 g to 7.39 g per thousand seeds, and there were many empty and astringent seeds. The seasonal dynamics of nutrients in 2-year-old pine needle leaf was similar, i.e., the N and P contents decreased, while K content increased, showing that the nutrient cycle was imbalance. The chlorophyll content in 2-year-old needle leaf of declined forest was high, while that in 1-year-old healthy forest was also high but with a wide increasing range. The infected harm of shoot blight was the clearest mark to the decline of man-made sand-fixation forest of Pinus sylvestris var. mongolica. After the forest declined, the height and the DBH of the pine trees decreased evidently, and the structure of DBH distribution moved "left". The quantity of weak pine trees increased by 15.9%-27.2%, the roots decreased by 22.9%-28.9%, and the absorbing roots (diameter < 0.5 cm) decreased most seriously. PMID:15825430

  8. Mycorrhization of containerised Pinus nigra seedlings with Suillus granulatus under open field conditions

    Energy Technology Data Exchange (ETDEWEB)

    Lazarevic, J.; Keca, N.; Martinovie, A.

    2012-07-01

    Seedling mycorrhization acts as an efficient tool for improving the quality of seedlings. In this study, the effectiveness of Suillus granulatus, originating from Pinus heldreichii forests (Montenegro), to produce containerized ectomycorrhizal seedlings of autochthonous Pinus nigra in open field conditions was investigated. Spore (106, 107, 108) and vegetative (1:16, 1:8, 1:4) inoculation on ectomycorrhizal formation and seedling growth were tested. Spore and vegetative inoculums of autochthonous Pisolithus arhizus were used in the same trial as additional control treatments. The utilization of vegetative and spore inoculums of autochthonous S. granulatus has proven to be an effective method of obtaining containerized ectomycorrhizal P. nigra seedlings under open field conditions after 11 months. S. granulatus spore inoculations resulted in well developed ectomycorrhiza, decreasing the growth of the P. nigra seedlings in the first growing season. Mycelial inoculations resulted in slightly developed S. granulatus ectomycorrhiza, which increased the growth of the seedlings. Therefore, it would be feasible to use spore inocula of S. granulatus, with 10{sup 6} spores per plant, to produce ectomycorrhizal P. nigra plants on a large scale. Controlled mycorrhizal inoculation of seedlings is not a common practice in Montenegrin and Serbian nurseries; as such, the obtained results will contribute to the enhancement of nursery production of Pinus nigra and other conifers. This also could be assumed as a starting point for many further efforts and investigations with autochthonous fungal and plant material in this region. (Author) 47 refs.

  9. Distribution of Pine Woolly Adelgids Infestation on Pinus merkusii Plantation in Java

    Directory of Open Access Journals (Sweden)

    Oemijati Rachmatsyah

    2012-12-01

    Full Text Available Pine woolly adelgid is a recently found exotic pest attacking seedling up to grown plants of Pinus merkusii plantations forest. Since its discovery, there were not much information about it.  The objectives of this research were to study pine woolly adelgids distribution, symptoms and indicators, and its scale of infestations on Pinus merkusii plantation in Java, to determine the presence of any specific P. merkusii sites invaded by pine woolly adelgids, considering the pests were native to boreal and temperate areas.  Hypothesis was pine woolly adelgids infestation on P. merkusii in Java is consistent with their native distribution.  There were 9 Forest Management Unit (KPH with infested P. merkusii plantations which were located at altitude between 900 to 1,700 m asl. with temperature ranging 16-22 ˚C and air humidity 80-90%. This indicated that Pine Woolly Adelgids required low temperature to survive, which was consistent with their original distribution. Host preference with regard to scale of infestation was closely related to temperature, altitude, and number of trees per hectare. The scale of infestation varied among regions, from light to heavy infested/death of trees.Keywords: pine woolly adelgid, Pinus merkusii, scale of infestation, host preferences

  10. Effects Of Drought Stress on Germination in Fourteen Provenances of Pinus Brutia Ten. Seeds in Turkey

    Directory of Open Access Journals (Sweden)

    Hakan Şevik

    2015-02-01

    Full Text Available Pinus brutia Ten., Red pine, known to be tough drought resistant pine specie, could effectively be used for afforestation of disturbed areas. It is of great interest for the afforestation in arid zones. Appropriate seed sources for the specific areas guarantees reforestation success. Away from its native areas Pinus brutia Ten. is planted for its ornamental value and timber production purposes. Selection of drought resistant provenances can very well increase the survival success. In this study, the effects of water potential on germination were studied in fourteen provenances of Pinus brutia Ten. from Turkey. Water potentials between 0 and -8 bars were obtained using polyethylene glycol 6000 (PEG-6000 solutions. Seeds were kept for 35 day at 20 ± 0.5°C. A decrease in water potential produced a marked reduction in germination percentage and germination value. As a result, significant variations between the provenances were found. It was determined that, under a -8 bar water stress, Isparta-Bucak and Mersin-Silifke, respectively corresponding to 58% and 57% of the control group, were the least water stress affected provenances.

  11. Strenght of the glue line of edge glued panels of Pinus taeda made with different adhesives

    Directory of Open Access Journals (Sweden)

    Merielen de Carvalho Lopes

    2013-12-01

    Full Text Available The study compares the strength of the glue line of edge glued panels of Pinus taeda made with different industrial adhesives. Three types of adhesives (poly(vinyl acetate (PVAc, emulsion polymer isocyanate (EPI and polyurethane (PU glued in two side gluing orientation (radial and tangential and analyzed after the conditioning tests (dry and wet were analyzed. The 360 specimens were prepared for determining the shear strength of edge glued panels of Pinus taeda, and these were tested in a universal testing machine called EMIC. The shear strength of the glue line at dry condition was lower in the tangential side for the three types of adhesives analyzed. The PU adhesive showed the highest values of shear strength in the applied conditions, differing from PVAc and EPI adhesive when tested on dry condition and did not differ from the others adhesives when tested on wet condition. The highest percentage of wood failure was observed after the shear strength test at dry condition to EPI adhesive glued in the radial side. And in the wet condition, the EPI adhesive and PU adhesive glued in tangential side showed higher mean values of wood failure. Thus, it was possible to conclude that the strength of the glue line of Pinus taeda wood was influenced by the type of adhesive and side gluing orientation, and showed differently behavior according to the condition of use (wet or dry.

  12. Mejoramiento genético del frijol rojo y negro mesoamericano para Centroamérica y El Caribe

    Directory of Open Access Journals (Sweden)

    Juan C. Rosas

    2000-01-01

    Full Text Available La producción de frijol en Centroamérica es llevada a cabo mayormente en laderas de suelos marginales, limitada por diversos factores bióticos y abióticos. Más de 350,000 t de este grano se producen en cerca de 0,5 millones de hectáreas, con rendimientos promedios de 678 kg/ha. La mayoría de los productores de frijol utilizan bajos insumos y muy pocas fincas están mecanizadas. El autoconsumo es alto; sin embargo, una alta proporción de este grano es comprado por intermediarios. En Honduras, el frijol es el sétimo cultivo en valor económico y es el de mayor rentabilidad entre el maíz, arroz y sorgo. Las dos clases comerciales más importantes en Centroamérica son el frijol rojo y negro pequeños (raza Mesoamérica. El mejoramiento de estos tipos de frijol se ha enfocado en el desarrollo de resistencia a enfermedades (mosaico común, mosaico dorado, antracnosis, mancha angular, roya, mustia hilachosa y bacteriosis común e insectos (principalmente picudo de la vaina; y tolerancia a baja fertilidad, sequía y calor. Programas adecuados de hibridación, evaluación y selección son usados para el desarrollo de cultivares con resistencia múltiple, alto rendimiento, buena adaptación y aceptación comercial. La ampliación de la base genética se obtiene usando fuentes de germoplasma Andino y Mesoamericano en la etapa de hibridación. La selección simultánea por varios caracteres y pruebas multilocalidades son utilizadas. Los viveros y ensayos de adaptación y rendimiento de líneas avanzadas son distribuídos a países de Centroamérica, México, y El Caribe. Las pruebas y validaciones en fincas y la liberación de variedades, son efectuadas por los programas nacionales de frijol de los países miembros de PROFRIJOL, en colaboración con el Zamorano, CIAT y el Bean/Cowpea CRSP

  13. HERPETOFAUNA DE NEGUANJE, PARQUE NACIONAL NATURAL TAIRONA, CARIBE COLOMBIANO HERPETOFAUNA OF NEGUANJE, TAIRONA NATIONAL NATURAL PARK , COLOMBIAN CARIBBEAN

    Directory of Open Access Journals (Sweden)

    LUÍS ALBERTO RUEDA-SOLANO

    Full Text Available La herpetofauna del Parque Nacional Natural Tairona (Sector Neguanje fue estudiada durante 30 días entre los meses de septiembre y octubre del 2004 por medio del método de registros de encuentros visuales, la búsqueda activa y la disposición de barreras de intercepción con trampas de caída. Se registraron 44 especies, 11 de anfibios y 33 de reptiles, distribuidas en 18 familias y 37 géneros. Las curvas de acumulación de especie mostraron que aproximadamente 20 días son suficientes para registrar todas las especies de lagartos para el sitio; una situación diferente fue observada para las especies de ranas y serpientes. El lagarto Lepidoblepharis sanctaemartae fue la especie con mayor abundancia relativa registrada en el sector, lo que implica un gran potencial para su protección. Se amplía la distribución local de la especie Colostethus ruthveni, reportada para otros sitios de la Sierra Nevada de Santa Marta desde su descripción en 1997. Finalmente, este estudio revela que la herpetofauna del sector de Neguanje representa el 33 % del número total de especies registradas para la Sierra Nevada de Santa Marta, lo que posiciona a esta zona como una de las más representativas en cuanto a biodiversidad en el Caribe Colombiano.The Herpetofauna of the Tairona National Natural Park (Neguanje sector was studied during 30 days between September and October 2004 by means of the visual records method, an active search and the arrangement of barriers with pitfall traps interception. 44 species (11 of amphibians and 33 of reptiles, distributed in 18 families and 37 genera, were registered. The species accumulation curves showed that approximately 20 days are sufficient to record all species of lizards, but not for the species of frogs and snakes. The lizard Lepidoblepharis sanctaemartae was the most abundant species recorded on the sector, which implies a potential advantage to assure its protection. The local distribution of the Colostethus

  14. Conocimientos, creencias y prácticas de los adolescentes de la cultura Caribe en anticoncepción

    Directory of Open Access Journals (Sweden)

    Patricia Lapeira Panneflex

    2016-01-01

    Full Text Available Introducción: La tasa global de fecundidad en Colombia ha disminuido y el uso de los métodos anticonceptivos (MAC ha aumentado; sin embargo el inicio temprano de las relaciones sexuales cuando aún no se tienen los conocimientos necesarios que faciliten la sexualidad segura, induce al uso ineficaz con pérdida del potencial anticonceptivo. Materiales y Métodos: Estudio descriptivo de corte trasversal realizado con 64 adolescentes de un barrio de la ciudad de Santa Marta, Colombia, utilizando para ello un instrumento compuesto por tres dominios relacionados con conocimientos,  creencias y prácticas  sobre MAC.  Resultados: La edad media de los adolescentes fue de 16 años. El 65,6% conoce los MAC aunque únicamente 54,7% dice usarlos. El 71,9% piensan que las personas que usan los MAC son responsables e informadas. El 48,8% piensan que usar anticonceptivos tiene unos efectos secundarios como gordura y esterilidad. El método preferido es el preservativo y la decisión de utilizarlo la toma el hombre, y el inicio de las relaciones sexuales ocurre hoy a una edad muy temprana, hecho atribuido a la influencia cultural. Discusión: Los resultados de este estudio guardan relación con investigaciones realizados a nivel nacional e internacional, demuestran que el desconocimiento y las actitudes negativas sobre anticonceptivos son obstáculo para su uso. Conclusiones: Todos los participantes sustentaron conocimientos en anticonceptivos, existiendo vacíos en ese conocimiento y/o creencias sobre efectos secundarios que inciden negativamente en su uso: se les atribuye ocasionar aumento de peso esterilidad. El método más utilizado por los adolescentes es el preservativo. Cómo citar este artículo: Lapeira P, Acosta D, Vásquez M. Conocimientos, creencias  y prácticas de los adolescentes de la cultura Caribe en anticoncepción. Rev Cuid. 2016; 7(1: 1204-9. http://dx.doi.org/10.15649/cuidarte.v7i1.243

  15. Calidad de vida del cuidador familiar del enfermo mental diagnosticado en el instituto de neurociencias del Caribe Santa Marta 2009

    Directory of Open Access Journals (Sweden)

    Tatiana Cecilia Gonzalez Noguera

    2013-10-01

    Full Text Available ResumenLa presenta investigación tiene, por objetivo, describir la calidad de vida de cuidadores familiares de enfermos mentales que asistieron al Instituto Neurociencias del Caribe en el área de hospitalización y consulta externa, durante los meses de junio - septiembre 2009 representando un total de 120. Se trata de un estudio descriptivo cuantitativo de corte transversal, el análisis se basó en responder la pregunta, ¿Cómo es la calidad de vida del familiar cuidador del enfermo mental?, para dar respuesta se aplicó el instrumento propuesto por Betty Ferrell y colaboradores, descrito como instrumento para medir la calidad de vida en su versión familiar (quality of life family version (QOL, el cual la define y operacionaliza en los bienestares físico, psicológico, social y espiritual. Los hallazgos permitieron evidenciar como las acciones de cuidado que efectúan los cuidadores familiares tienen impacto nocivo en su calidad de vida, estableciendo un significativo deterioro en los bienestares físico y social, en menor grado el bienestar psicológico y con un potencial explicativo que concluye con un bienestar espiritual, que no mostró afectación. (DUAZARY 2010, 191 - 198AbstractThe main objective of this investigation is to describe the quality of life of the mental patients’ family caregivers that attended the Neuroscience Institute of the Caribbean in the Hospitalization and external consultation area, during the months of June through September 2009 representing a total of 120. It is about a quantitative descriptive study of cross section, the analysis was based on answering the question, how is the quality of life of the mental patient’s family caregiver?, to answer it was applied the instrument proposed by Betty Ferrell and collaborators, described as instrument to measure the quality of life in its family version (quality of life family version (QOL, which defines it and makes it operational in the physical, psychological

  16. DISEÑO DE UN SISTEMA DE GESTIÓN DE LA CALIDAD EN EL PROCESO DE ALOJAMIENTO EN EL HOTEL “GRAN CARIBE VILLA TORTUGA” / DESIGN OF A QUALITY MANAGEMENT SYSTEM IN THE PROCESS OF ACCOMMODATION IN "GRAN CARIBE VILLA TORTUGA” HOTEL

    Directory of Open Access Journals (Sweden)

    Marilet Cazañas-Rivero

    2011-03-01

    Full Text Available

    Teniendo en cuenta el desarrollo de la industria turística y la necesidad de la excelencia competitiva, se concibe este trabajo en el Hotel “Gran Caribe Villa Tortuga” con el objetivo central de diseñar un Sistema de Gestión de la Calidad que permita la mejora del proceso de Alojamiento en este Hotel. Después de un diagnóstico inicial se demostró la necesidad de realizar cambios significativos en la instalación, donde existen dificultades en cuanto a la gestión de la calidad adecuada a las características del Hotel, en el cual no se toman acciones que permitan resolver dichas deficiencias. Se elaboró un procedimiento para el diseño del Sistema de gestión de la Calidad en el Hotel “Gran Caribe Villa Tortuga”. El diseño del Sistema de Gestión de la Calidad en el área de Alojamiento brinda a la dirección del Hotel el estado actual de la calidad de los servicios en esta área, mediante la aplicación de las técnicas utilizadas y ofrece las estrategias a seguir para lograr un mejor servicio.

    Abstract

    Taking into account the development of the tourist industry and the necessity of the competitive excellence it is conceived this work in the “Gran Caribe Villa Tortuga” Hotel, focusing in the design of a Quality Management System that allows the improvement of the process of Accommodation in this Hotel. After an initial diagnosis, it was demonstrated the necessity of carrying out significant changes in the facilities. There are some difficulties regarding quality management suited to the characteristics of the Hotel in which actions that allow solving these deficiencies are not carried out. It was elaborated a procedure for the design of the Quality Management System in the “Gran Caribe Villa Tortuga” Hotel. The design of the Quality Management System in the Accommodation area provides the Hotel management with the current state of service quality in this area by means of the

  17. DISEÑO DE UN SISTEMA DE GESTIÓN DE LA CALIDAD EN EL PROCESO DE ALOJAMIENTO EN EL HOTEL “GRAN CARIBE VILLA TORTUGA” / DESIGN OF A QUALITY MANAGEMENT SYSTEM IN THE PROCESS OF ACCOMMODATION IN "GRAN CARIBE VILLA TORTUGA” HOTEL

    OpenAIRE

    Marilet Cazañas-Rivero; Aleida González-González; María de los Ángeles González-Solá

    2011-01-01

    Teniendo en cuenta el desarrollo de la industria turística y la necesidad de la excelencia competitiva, se concibe este trabajo en el Hotel “Gran Caribe Villa Tortuga” con el objetivo central de diseñar un Sistema de Gestión de la Calidad que permita la mejora del proceso de Alojamiento en este Hotel. Después de un diagnóstico inicial se demostró la necesidad de realizar cambios significativos en la instalación, donde existen dificultades en cuanto a la gestión de la calidad adecuada...

  18. Composition and Trends of Short-Lived Trace Gases in the UT/LS over Europe Observed by the CARIBIC Aircraft

    Science.gov (United States)

    Baker, A. K.; Brenninkmeijer, C. A.; Oram, D. E.; O'Sullivan, D. A.; Slemr, F.; Schuck, T. J.

    2009-12-01

    The CARIBIC project (Civil Aircraft for the Regular Investigation of the atmosphere Based on an Instrument Container) involves the monthly deployment of an instrument container equipped to make atmospheric measurements from aboard a commercial airliner, and has operated since 2005 from aboard a Lufthansa Airbus 340-600 . Measurements from the container include in-situ trace gas and aerosol analyses and the collection of aerosol and whole air samples for post-flight laboratory analysis. Measurements made from the sampling flasks include greenhouse gas (GHG), halocarbon and nonmethane hydrocarbon (NMHC) analysis. CARIBIC flights originate in Frankfurt, Germany with routes to India, East Asia, South America, North America and Africa, and typical aircraft cruising altitudes of 10-12km allow for the monitoring of the upper troposphere/lower stratosphere (UT/LS) along these routes. Data collected during the aircraft’s departure from and return to Frankfurt provide a 4 year time series of near-monthly measurements of the composition of the UT/LS above Europe. Here we present a discussion of the composition of short-lived trace gases in the whole air samples collected above Europe during CARIBIC flights. Over 150 air samples were collected between May 2005 and July 2009, or about 4 samples per month. Of the whole air samples collected, about 45% showed influence by stratospheric air (i.e. very low values of GHG, NMHC and halocarbons, elevated O3, high potential vorticity). The remaining samples were representative of the upper troposphere; back trajectories for these samples indicate that a little over half were collected in air masses that had been in the boundary layer within the previous 8 days. The predominant source regions for these samples were the Gulf of Mexico and continental North America. Owing to their wide range of chemical lifetimes and the varying composition of emissions, short-lived trace gases transported to the UT/LS can be useful indicators of source

  19. Estimates of methane emissions from India using CH4-CO-C2H6 relationships from CARIBIC observations in monsoon convective outflow

    Science.gov (United States)

    Baker, A. K.; Rauthe-Schöch, A.; Schuck, T. J.; van Velthoven, P. F.; Slemr, F.; Brenninkmeijer, C. A.

    2010-12-01

    A large fraction of methane sources are anthropogenic, and include fossil fuel use, biomass/biofuel burning, agriculture and waste treatment. Recently, much attention regarding emissions of greenhouse gases has focused on large, developing nations, as their emissions are expected to rise rapidly over the coming decades. As the second most populous country in the world, and one of the fastest growing economies, India has been of particular interest. Arguably the most important feature of meteorology in India is the Asian summer monsoon. During the monsoon period there exists persistent deep convection over Southern Asia, and the composition of convected air masses is strongly influenced by emissions from India. This ultimately results in a well-mixed air parcel containing air from India being transported to the upper troposphere. Over the course of the 2008 monsoon period the CARIBIC (Civil Aircraft for the Regular Investigation of the atmosphere Based on an Instrument Container) passenger aircraft conducted monthly measurement flights which probed this outflow. Data collected during these flights provides a unique opportunity to examine sources of atmospheric species in India. Here we use measurements of methane (CH4), carbon monoxide (CO) and ethane (C2H6) from whole air samples collected during CARIBIC flights to estimate emissions of methane and to quantify those emissions related to flooding during the monsoon. Methane data from the monsoon period show enhancements inside the monsoon plume, which increase as the monsoon progresses. Using emission data for CO and ΔCH4/ΔCO derived from CARIBIC measurements, we estimate total methane emissions to be ~40 Tg yr-1. Relationships of methane to ethane, which shares the bulk of its sources with methane but lacks a biological component, are further used to estimate the fraction of “extra” emissions from biological activity related to increased monsoon rains. This additional methane is a considerable fraction of

  20. Democracia, migraciones globales y gobernabilidad en América Latina y el Caribe: perspectivas y retos

    Directory of Open Access Journals (Sweden)

    José Agustín Millán Muñoz

    Full Text Available Las migraciones humanas, a comienzos del siglo XXI son cualitativamente distintas de las precedentes que han habido, gracias a las revoluciones tecnológicas, en especial, la de las comunicaciones, las cuales, están modificando sustancialmente los elementos de relación política, jurídica, social y cultural de esos colectivos y sus inserciones, tanto en la sociedad receptora como la de origen, en especial en ámbitos vitales como los del trabajos, identidad social, producción de capitales y transferencia de conocimientos, dentro de lo que se ha denominado globalización. Estos impactos son de extrema importancia en América latina y el Caribe puesto que las sociedades de esta región tradicionalmente ha sido promotora de emigrantes, en especial, hacia los estados Unidos y en fecha reciente a otras zonas del planeta. Permitiendo el surgimiento de una forma social nuevo de bicolectivos dentro de una nueva geopolítica de la ingencia humana, que esta planteando nuevos derechos que implican un reto al Derecho Internacional, que patentizan las insuficiencias del estado- nación para hacer justicia a esos nuevos conjuntos de seres humanos implicados por el fenómeno de la migración dentro del contexto de la globalización y su marco democrático. Sin embargo, hay señales bien significativos que indican que la democracia no está bien preparada para lo que está implicando con esas transformaciones que plantean las migraciones en el plano de la globalización que reporta la revolución tecnológica, pues ya la democracia es una forma de vida más que de gobierno. Por estas razones, deseamos explorar, con este escrito, esas relaciones en el contexto globalizado en América latina y el Caribe, destacando que resulta sumamente perturbador para la justicia de las relaciones internacionales y para la concordia de las relaciones. 160 internacionales y gobernabilidad entre las naciones, el reducir las mismas a un paradigma de seguridad nacional, de pol

  1. Madera, un Potencial Material Lignocelulósico para la Producción de Biocombustibles en Colombia Wood, Potencial Lignocellulosic Material for the Production of Biofuels in Colombia

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    Elkin A Gómez

    2012-01-01

    Full Text Available Se analiza la disponibilidad del recurso madera en Colombia para evaluar su potencial uso en la producción de etanol carburante. Se analiza la diversidad de especies, las condiciones de plantación y crecimiento de especies arbóreas y la composición química de sus maderas. El análisis indica que casi la mitad del área reforestada con fines comerciales está compuesta por coníferas, entre las que predominan las especies Pinus patula, Pinus caribaea y Eucalyptus grandis. Asimismo se identificaron las especies Pinus patula, Eucalyptus camaldulensis y Eucalyptus grandis como las de más elevado rendimiento y Pinus caribaea, Pinus patula y Eucalyptus camaldulensis como las de más alto contenido de celulosa. Se concluye que dado el gran desarrollo tecnológico y competencia comercial de los productos derivados del pino y eucalipto, Colombia debe aprovechar las ventajas mencionadas y realizar reforestación comercial con estas especies nativas.The availability of woody resources in Colombia is studied for evaluating their potential for the production of ethanol as a fuel. The diversity of species, the planting and growth conditions of trees and the chemical composition of their woods were analyzed. The study shows that about half of the forested area for commercial purposes is formed by conifers, among which Pinus patula, Pinus caribaea and Eucalyptus grandis are the most abundant. Also, the species Pinus patula, Eucalyptus camaldulensis and Eucalyptus grandis showed the highest yield and Pinus caribaea, Pinus patula and Eucalyptus camaldulensis with the highest cellulose content. Given the great technological and highly competitive commercial products derived from pine and eucalyptus, Colombia should take advantage of its situation and promote reforestation with these native species.

  2. Biometrical study of some individuals chosen from Pinus mugo turra populations in the peat bog "Bór na Czerwonem"

    Directory of Open Access Journals (Sweden)

    Alina Bączkiewicz

    2014-02-01

    Full Text Available Sixteen individuals were sampled for study of variation in 17 anatomical and morphological characters. Only individuals of low polycormic growth (trait typical for Pinus mugo Turra connected with incurved one-year-cone stipes (a similar situation exists in Pinus sylvestris L. were chosen, thus the sample studied cannot be treated as a random one. It has been shown by multivariate statistical analysis that these 16 individuals are quite different from each other, Mahalanobis'generalized distances between them being nearly 50% significantly different from 0. The sample studied in this respect is distinctly different from pure stands of both putative parental species (i.e. Pinus mugo and P. sylvestris. Every plant studied shows a different combination of traits typical (or nearly typical for both the above-mentioned species and traits that are truly intermediate between them. The results support the frequently expressed opinion that the mountain pine population from the peat bog "Bór na Czerwonem" is, in fact, a hybrid swarm formed by hybridization between Pinus mugo and Pinus sylvestris.

  3. Intra- and interpopulation relationships and taxonomic status of Pinus nigra Arnold in Croatia according to morphology and anatomy of needles

    Directory of Open Access Journals (Sweden)

    Zlatko Liber

    2014-02-01

    Full Text Available Intra- and interpopulational relationships and taxonomic status of six natural black pine populations (Pinus nigra Arnold from Croatia were analyzed. Special attention in this research was paid to the establishment of taxonomic status and distribution of stenoendemic Dalmatian black pine (Pinus nigra Arnold subsp. dalmatica (Vis. Franco. Three morphological and twenty-one anatomical traits of needles were used as well as analysis by the methods of multivariate statistics. Most of the researched individuals showed strong population affiliation, whereas a clinal transition of morphological and anatomical traits of needles was determined among the populations. The opinion of the existence of three subspecies of black pine on the territory of Republic of Croatia (Pinus nigra Arnold subsp. nigra, Pinus nigra Arnold subsp. dalmatica (Vis. Franco and Pinus nigra Arnold subsp. illyrica (Vid. Fukarek was confirmed. For each of the three subspecies new ranges were represented. Four Croatian populations were included in the stenoendemic subspecies of the Dalmatian black pine (Brač, Hvar, Grobnik and Pelješac, and a new distribution, broken in two, was suggested. Since the Dalmatian black pine has been reduced to several populations only, and there are some signs of continuous diminishing of its range, this research points out the need of making an action plan to preserve all natural populations of this subspecies.

  4. ¿Países de renta media? Una taxonomía alternativa del desarrollo de América Latina y el Caribe

    OpenAIRE

    Tezanos Vázquez, Sergio; Quiñones Montellano, Ainoa

    2012-01-01

    RESUMEN. Aunque no es fácil clasificar a los países en función de sus niveles de desarrollo —principalmente porque el concepto de «desarrollo humano» es complejo y multidimensional—, la clasificación más extendida es precisamente la más sencilla, basada en la renta per cápita. De acuerdo con esta clasificación, la mayoría de los países de América Latina y el Caribe (ALC) se ubican en el estrato medio de la renta mundial. En este artículo proponemos una «taxonomía del desarrollo» alternativa p...

  5. El rol de la educación superior para el desarrollo humano y social en América Latina y el Caribe

    OpenAIRE

    Didriksson, Axel

    2008-01-01

    La primera parte del artículo analiza la necesidad de alcanzar un desarrollo humano y social con sustentabilidad en América Latina y el Caribe en el contexto de la globalización, además de las implicaciones de la globalización y sus efectos sobre la educación superior. El artículo plantea que la educación superior es vital para alcanzar el desarrollo humano con sustentabilidad en la región, como mecanismo de igualdad y de justicia y de modernización. Además, analiza los desafíos de las unive...

  6. La cátedra de estudios afrocolombianos: una posibilidad de descolonización del lenguaje en el Caribe seco colombiano

    Directory of Open Access Journals (Sweden)

    Ernell Villa

    2011-04-01

    Full Text Available En este trabajo se hace un reconocimiento a las apuestas que se desarrollan en una zona silenciada dentro de una región excluida. El Caribe seco es un lugar de la geografía colombiana donde las comunidades negras vienen desarrollando diferentes acciones para afirmar la vida desde la descolonización. El texto aborda el sentido pedagógico de la Cátedra de Estudios Afrocolombianos, a partir de prácticas culturales devaluadas. Inicialmente se hace una contextualización histórica, territorial, jurídica, educativa y organizativa, para insistir luego sobre la necesidad de generar una política de producción cultural desde las realidades de las comunidades negras.

  7. CONTRIBUCIÓN ANTROPOGÉNICA A LOS CAMBIOS GEOMORFOLÓGICOS Y EVOLUCIÓN RECIENTE DE LA COSTA CARIBE COLOMBIANA

    Directory of Open Access Journals (Sweden)

    RANGEL BUITRAGO NELSON

    2010-05-01

    Full Text Available La evolución reciente del Caribe colombiano está asociada, entre otras causas, a una marcada influencia antropogénica sobre la morfología litoral. A lo largo de los 30 municipios costeros que conforman esta región, se encuentran áreas intervenidas por el hombre que al mismo tiempo son afectadas por retrocesos significativos en su línea de costa. La tendencia erosiva predominante es influenciada y multiplicada, en muchos de los casos, por una expansión humana desorganizada y los fenómenos que ésta trae consigo. Un análisis general en algunas áreas permitió identificar acciones realizadas por el hombre, su influencia e sus impactos negativos sobre la geomorfofogía y evolución reciente del sistema litoral

  8. La cooperación financiera internacional para la lucha contra el SIDA en América Latina y el Caribe

    Directory of Open Access Journals (Sweden)

    René Leyva-Flores

    2014-07-01

    Full Text Available El objetivo fue analizar la contribución financiera del Fondo Mundial para la Lucha contra el SIDA, y su relación con los criterios de elegibilidad para asignar fondos en América Latina y el Caribe, 2002-2010. Análisis descriptivo (regresión lineal de aportes financieros del Fondo Mundial, según criterios de elegibilidad: nivel de ingreso, carga de la enfermedad, coinversión gubernamental de los países. Las aportaciones financieras correspondieron a US$ 705 millones. Países con menor nivel de ingresos recibieron mayores aportaciones; no hay relación con la carga de la enfermedad. La cooperación financiera internacional realiza aportaciones complementarias al gasto gubernamental, con políticas de equidad en la asignación financiera.

  9. El papel del estado en la construcción del desarrollo sostenible: el caso del turismo en el Caribe Insular.

    Directory of Open Access Journals (Sweden)

    James Cruz Johannie

    2009-12-01

    Full Text Available La discusión acerca de la pertinencia de la intervención estatal en el mercado ha sido reiterativa en la historia del pensamiento económico. El turismo es otro ejemplo de que la regulación es no sólo necesaria sino fundamental, para corregir las asimetrías de un mercado que está lejos de cumplir los supuestos que motivaron la teoría del interés individual y del beneficio social como resultado. El presente trabajo intenta enfatizar en las implicaciones de ignorar el papel del Estado en la construcción del desarrollo sostenible, haciendo especial énfasis en el turismo en el Caribe insular.

  10. Tendències investigadores de la ciència de la informació i la biblioteconomia a Iberoamèrica i al Carib

    Directory of Open Access Journals (Sweden)

    Menéndez Echavarría, Alfredo Luis

    2015-12-01

    Full Text Available Objectiu: aquest article presenta categories que mostren tendències investigadores de la ciència de la informació i la biblioteconomia en l'entorn d'Iberoamèrica i el Carib. Les categories han estat producte d'una recerca l'objectiu de la qual es relaciona amb l'anàlisi d'aquests aspectes predictius i prospectius de la disciplina, així com la configuració de l'horitzó d'aquest camp des d'una perspectiva científica. -- Metodologia: l'enfocament que assumeix el projecte és de caràcter mixt, ja que integra l'anàlisi quantitativa i qualitativa, tenint en compte que s'utilitzen tècniques bibliomètriques, i procediments que integren l'ús de variables de mesura i obtenció d'indicadors de producció científica. De la mateixa manera, s'examinen i descriuen els articles seleccionats respecte del seu contingut teoricoepistemològic, recuperats del Web of Science, informació d'Iberoamèrica i del Carib, entre els anys 2009 i 2013, corresponents als títols de revistes que integren la categoria temàticaObjetivo: este artículo presenta categorías que evidencian tendencias investigativas de la ciencia de la información y la bibliotecología en el entorno de Iberoamérica y el Caribe. Estas han sido producto de una investigación cuyo objetivo se relaciona con el análisis de estos aspectos predictivos y prospectivos de la disciplina, así como la configuración del horizonte de este campo desde una perspectiva científica. -- Metodología: el enfoque que asume el proyecto es de carácter mixto, pues integra el análisis cuantitativo y cualitativo, teniendo en cuenta que se utilizan técnicas bibliométricas, y procedimientos que integran el uso de variables de medición y obtención de indicadores de producción científica. De igual modo se examinan y describen los artículos seleccionados respecto de su contenido teórico-epistemológico, recuperados de la Web of Science, información de Iberoamérica y el Caribe, entre los años 2009 y

  11. La formalización del voluntariado juvenil en Nicaragua en el contexto de América Latina y el Caribe

    Directory of Open Access Journals (Sweden)

    René Olate

    2009-12-01

    Full Text Available EL ARTÍCULO SE BASA EN UNA INVESTIGACIÓN QUE UTILIZA LA TEORÍA de los orígenes sociales de la sociedad civil (Salamon & Anheier, 1998 y el concepto de formalización para analizar los programas de voluntariado juvenil en Nicaragua. Describe el nivel de formalización de los mismos y lo compara con el de otros países de la subregióny de América Latina y el Caribe. También analiza la relación existente entre la formalización y orientación de estos programas y un conjunto de variables a nivel de programa, organización y país.

  12. Consideraciones sobre un currículo para la enseñanza del español como lengua extranjera en el Caribe colombiano

    Directory of Open Access Journals (Sweden)

    Clara Inés Fonseca Mendoza

    2009-01-01

    Full Text Available En este artículo se presenta un avance de algunas consideraciones iniciales tenidas en cuenta para el diseño del nivel de fundamentación de un currículo para la enseñanza del español como lengua extranjera. En él se propone una interpretación formulada a partir de la hipótesis unidad de producción del discurso de Teun van Dijk (2000, que bien puede explicar el papel del lenguaje en el aprendizaje de lenguas extranjeras; también se incluyen los puntos de vista sobre el papel de la norma y la variedad lingüística sostenidos al interior del grupo SICELE1 nodo Caribe, organización en la cual se propone el mencionado currículo.

  13. Generación de series sintéticas de oleaje en lugares con instrumentación escasa del mar caribe colombiano.

    OpenAIRE

    Ortega Arango, Santiago; Osorio Arias, Andrés Fernando; Agudelo Restrepo, Pablo; Vélez Upegui, Jaime Ignacio

    2010-01-01

    Se busca generar series de oleaje por medio de simulación numérica,usando modelos de propagación de oleaje de tercera generación, con vientos de re análisis y batimetrías como insumos. Una vez generadas, las series sintéticas son comparadas con la instrumentación existente. A partir de esta comparación, y de análisis en los dominios del tiempo y de la probabilidad, se determinan las ecuaciones de corrección para las series. Se presenta la aplicación de este esquema al Caribe Colombiano, y ...

  14. Análisis biogeográfico de la flora de un bosque seco tropical (bs-T) en el Caribe colombiano

    OpenAIRE

    Cortés Rocío; Banda Rodríguez Karina; Galeano Gloria

    2006-01-01

    Con el propósito de encontrar las afinidades florísticas de un bosque seco tropical (bs-T) en el Caribe colombiano
    y las regiones con las que, históricamente, se encuentra mejor relacionado, se evaluaron las distribuciones de 183 especies de la flora de la Hacienda “El Ceibal”. Ésto se realizó mediante un análisis de similitud de áreas, y bajo un enfoque panbiogeográfico. Se encontró que las áreas más afines actualmente con la flora del “El Ceibal” son los bosques húmedos y secos c...

  15. Las mejores practicas en la promoción y el uso de energías renovables en America Latina y el Caribe

    OpenAIRE

    Andrea Luecke

    2011-01-01

    Este documento pretende dar una instantánea de algunas de las mejores prácticas en la promoción y uso de las energías renovables, y proporcionar ejemplos prácticos del desarrollo de los mercados de energías renovables que los países de América Latina y el Caribe pueden replicar. Este breve estudio proporciona una visión general de algunas de las tecnologías de energías renovables más comúnmente usadas. También analiza los mercados de energía renovable actuales y potenciales en ALC, los benefi...

  16. Participación de las mujeres en la construcción social del territorio y el proceso de regionalización del Caribe colombiano

    OpenAIRE

    Yusmidia Solano

    2007-01-01

    Este trabajo describe el papel de las mujeres en los procesos de construcción de territorios y de regionalización en la costa Caribe colombiana. En primer lugar, se presenta la participación de las mujeres en los procesos adaptativos de los primeros habitantes, a través de su contribución a la creación de las culturas más importantes que surgieron en la región, tales como la Tairona y la Sinú. También, se consideran las acciones de resistencia de las mujeres indígenas que se opusieron a la in...

  17. Palaemonidae (Crustacea: Decapoda: Caridea from the shallow waters from Quintana Roo, Mexican Caribbean coast Palaemonidae (Crustacea: Decapoda: Caridea de las aguas someras de Quintana Roo, Caribe mexicano

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    Ramiro Román-Contreras

    2010-04-01

    Full Text Available Few studies have focused on the palaemonid fauna of the Mexican Caribbean. This study provides a list of shallow water free-living and symbiont shrimps of the family Palaemonidae collected on turtle grass (Thalassia testudinum in Bahía de la Ascensión, Bahía del Espíritu Santo and Mahahual reef lagoon, Quintana Roo, Mexico. Ten species in 8 genera are reported, of which the genus Periclimenes is the most diverse with 3 species. An updated geographic distribution along the western Atlantic and other regions is provided for all the species. The greatest affinity of the palaemonid fauna studied, besides that with the Caribbean province, is with the Brazilian, Argentinian, and Texan zoogeographic provinces. Of the 10 species reported in this paper, 8 represent new local records in the studied area.Los crustáceos de la familia Palaemonidae del Caribe mexicano han sido poco estudiados. En este trabajo se presenta un listado de palemónidos de vida libre y simbiontes recolectados en el pasto marino Thalassia testudiuim de Bahía de la Ascensión, Bahía del Espíritu Santo y la laguna arrecifal de Mahahual, Quintana Roo, México. Se registran 10 especies pertenecientes a 8 géneros, siendo el género Periclimenes el más diverso con 3 especies. Para todas las especies se proporciona su distribución geográfica en la costa del Atlántico americano así como en otras regiones. Además de la provincia Caribeña, los palemónidos recolectados también muestran alta afinidad con otras provincias zoogeográficas como la Brasileña, Argentina y Texana; de las 10 especies registradas en este estudio, 8 representan nuevo registro local en el área estudiada.

  18. REFORMA EDUCATIVA A PARTIR DOS ANOS 1990: IMPLEMENTAÇÃO NA AMÉRICA LATINA E CARIBE, E PARTICULARIDADES BRASILEIRAS

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    L. L. S. Silva

    2012-05-01

    Full Text Available Reflete-se acerca de alguns pontos e contrapontos da reforma educativa implantada na América Latina e Caribe, nos anos 1990, enfocando-se as particularidades da efetivação dessa reforma no Brasil. Trata-se de um estudo teórico que prioriza a literatura que versa sobre os pressupostos que fundamentam a economia global e informacional norteadora das reformas no plano político e influenciadoras das transformações sociais em escalas: local, regional, nacional e internacional, bem como da reforma educativa em discussão. Observa-se que, praticamente todos os países da América Latina e Caribe impulsionaram ações e esforços na direção de reformas educativas. No caso brasileiro os estudos enfatizam que essas reformas se encaminharam para a reorganização institucional, a descentralização da gestão administrativa, financeira e pedagógica e para o fortalecimento da autonomia das escolas. Essas sinalizaram, ainda, para uma política de municipalização com transferência de responsabilidades da União para os municípios e para a desarticulação do ensino médio integrado, respaldada pelo Projeto de Lei nº 1.603/96 e pelo Decreto nº 2.208/97, no âmbito da educação profissional.

  19. O Brasil e o Grão Caribe: fundamentos para uma nova agenda de trabalho Brazil and the Great Caribbean basin: the making of a new agenda

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    Carlos Federico Domínguez Avila

    2008-01-01

    Full Text Available O artigo aborda as relações econômicas, políticas e de segurança internacional vigentes entre o Brasil e os 25 países da bacia do Caribe - México, América Central, Antilhas, Colômbia, Venezuela, Guiana e Suriname, além de uma dezena de territórios coloniais administrados por potências extra-regionais. Constata-se que as relações econômicas são muito intensas, especialmente em termos comerciais e de investimentos produtivos. O diálogo político entre as partes é construtivo, relevante e cada vez mais significativo. No que diz respeito às questões de segurança, vale destacar suas convergências, bem como certas divergências de natureza geopolítica derivadas do projeto brasileiro para a América do Sul. No final do artigo, propõem-se três cenários plausíveis para o futuro das relações entre Brasil e Caribe.The paper explores the economic, political and security relations between Brazil and the 25 Caribbean countries - Mexico, Central America, the Caribbean islands, Colombia, Venezuela, Guiana and Suriname, inasmuch the colonial territories. The text suggest that the economic relations are very intensive. The political dialogue is constructive. In the security field, there are some convergences and divergences derived from the brazilian=s South American project. At the end, the paper consider three reasonable scenarios for the Brazilian-Caribbean relations.

  20. Adaptation in a plant-hummingbird association.

    Science.gov (United States)

    Temeles, Ethan J; Kress, W John

    2003-04-25

    Sexual dimorphism in bill morphology and body size of the Caribbean purple-throated carib hummingbird is associated with a reversal in floral dimorphism of its Heliconia food plants. This hummingbird is the sole pollinator of H. caribaea and H. bihai, with flowers of the former corresponding to the short, straight bills of males, the larger sex, and flowers of the latter corresponding to the long, curved bills of females. On St. Lucia, H. bihai compensates for the rarity of H. caribaea by evolving a second color morph with flowers that match the bills of males, whereas on Dominica, H. caribaea evolves a second color morph with flowers that match the bills of females. The nectar rewards of all Heliconia morphs are consistent with each sex's choice of the morph that corresponds to its bill morphology and energy requirements, supporting the hypothesis that feeding preferences have driven their coadaptation. PMID:12714743

  1. Response of needle dark respiration of Pinus koraiensis and Pinus sylvestriformis to elevated CO2 concentrations for four growing seasons' exposure

    Institute of Scientific and Technical Information of China (English)

    ZHOU YuMei; HAN ShiJie; ZHANG HaiSen; XIN LiHua; ZHENG JunQiang

    2007-01-01

    The long-term effect of elevated CO2 concentrations on needle dark respiration of two coniferous species-Pinus koraiensis and Pinus sylvestriformis on the Changbai Mountain was investigated using open-top chambers. P. Koraiensis and P. Sylvestriformis were exposed to 700,500μmol·mol-1 CO2 and ambient CO2(approx.350 μmol·mol-1)for four growing seasons. Needle dark respiration was measurd during the second, third and fourth growing seasons' exposure to elevated CO2.The results showed that needle dark respiration rate increased for P. Koraiensis and P. Sylvestriformis grown at elevated CO2 concentrations during the second growing season, could be attributed to the change of carbohydrate and/or nitrogen content of needles. Needle dark respiration of P. Koraiensis was stimulated and that of P. Sylvestriformis was inhibited by elevated CO2 concentrations during the third growing season. Different response of the two tree species to elevated CO2 mainly resulted from the difference in the growth rate. Elevated CO2 concentrations inhibited needle dark respiration of both P. Koraiensis and P. Sylvestriformis during the fourth growing season. There was consistent trend between the short-term effect and the long-term effect of elevated CO2 on needle dark respiration in P. Sylvestriformis during the third growing season by changing measurement CO2 concentrations. However, the short-term effect was different from the long-term effect for P. Koraiensis. Response of dark respiration of P. Koraiensis and P. Sylvestriformis to elevated CO2 concentrations was related to the treatment time of CO2 and the stage of growth and development of plant. The change of dark respiration for the two tree species was determined by the direct effect of CO2 and long-term acclimation. The prediction of the long-term response of needle dark respiration to elevated CO2 concentration based on the short-term response is in dispute.

  2. Densidade e tamanho de formigueiros de Acromyrmex crassispinus em plantios de Pinus taeda Density and size of Acromyrmex crassispinus nests in Pinus taeda plantations

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    Mariane Aparecida Nickele

    2009-04-01

    Full Text Available O objetivo deste trabalho foi avaliar a densidade e o tamanho dos formigueiros de Acromyrmex crassispinus, ao longo do ano, em plantios de Pinus taeda de diferentes idades. Os experimentos foram realizados, em Rio Negrinho e em Três Barras, SC, em talhões de P. taeda com diferentes idades (recém-plantado, três anos e seis anos de idade. Em cada tratamento, foram demarcadas três parcelas de 1 ha. Os formigueiros foram classificados em três classes de tamanho: classe I, até 30 cm de diâmetro; classe II, 31 a 60 cm; e classe III, mais que 61 cm. A densidade de formigueiros de A. crassispinus foi menor no início do desenvolvimento da floresta, praticamente duplicou nos plantios com três anos, e reduziu quando a floresta estava com seis anos. A maior densidade de formigueiros ocorreu no período de dezembro a abril. Os formigueiros aumentaram de tamanho com a idade do pínus.The objective of this work was to evaluate the density and size of Acromyrmex crassispinus nests in Pinus taeda plantations along the year. The experiments were carried out in Rio Negrinho and Três Barras, SC, Brazil, in P. taeda plantations of different ages (recently planted and three and six years old. Three plots of one hectare were delimited in each treatment. The nests were classified according to three size classes: class I, up to 30 cm diameter; class II, 31 up to 60 cm; class III, above 61 cm. The density of A. crassispinus nests was low in recently planted areas, nearly twofold in three year-old plantations, and it reduced when the forest was six years old. The greatest nest density occurred in the period from December to April. The nests size increased along with the age of the P. taeda plantations.

  3. Isoenzymatic variability in progeny of Pinus mugo Turra x Pinus sylvestris L. hybrids from Bór na Czerwonem, in experimental culture

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    Maria A. Bobowicz

    2014-02-01

    Full Text Available The article describes the genetic structure of 12-year old seedlings. They were grown in an experimental culture representing the progeny of natural hybrids of Pinus mugo Turra and Pinus sylvestris L. from the peatbog Bór na Czerwonem. The studies were carried out on seedlings, employing electrophoresis of enzymatic proteins from winter buds. Parallel isoenzymatic analyses were also conducted for trees of P. mugo Turra from Tatra Mountains and for P. sylvestris L. trees from Białowieża in order to determine similarities of the hybrids to the 'pure' species, thought to represent parental forms, and for natural hybrids from Bór na Czerwonem. The obtained electrophoretic patterns made the determination of genetic structure of the population possible, namely of the observed heterozygosity, expected heterozygosity, Wright's fixation index and coefficients of similarity according to Nei and Hedrick. Genetic distances between the populations were also estimated. The variability of 11 enzymatic loci demonstrated the highest level of variability in the population of hybrids. Coefficients of genetic differentiation (GST and of gene flow, (Nm suggested a close relationship of the hybrids to P. mugo which may indicate an introgressive type of the hybrid swarm, from which the studied trees originated. The analysis of genetic similarity coefficients, according to Nei and Hedrick, demonstrated also an extensive similarity of the two hybrid groups to P. mugo. However, upon analysis of individual enzymatic loci, some of them highly resembled P. mugo while others were similar to P. sylvestris. The closest genetic similarity was demonstrated for the group of hybrids from the peatbog and the respective of hybrides group from culture. The variable gene expression as well as asymmetric inheritance of isoenzymes provided additional evidence of the introgressive character of the studied trees from the hybrid population.

  4. The Influence of Pinus brutia on the Water Balance of Fractured Mediterranean Mountain Environments

    Science.gov (United States)

    Eliades, Marinos; Bruggeman, Adriana; Lubczynski, Maciek; Christou, Andreas

    2016-04-01

    In dry Mediterranean environments, both rainfall and temperature vary throughout the year and frequent droughts occur. The mountainous topography is characterized by steep slopes, often leading to shallow soil layers with limited water storage capacity. While for most of the tree species, these conditions can be characterized as unfavourable, Pinus brutia trees manage to survive and thrive. The main objective of this study is to define and quantify the water balance components of a Pinus brutia forest at tree level. Our study was conducted from 30/12/2014 until 31/09/2015 in an 8966-m2 fenced area of Pinus brutia forest. The site is located on the northern foothills of Troodos mountain at 620 m elevation, in Cyprus. The slope of the site ranged between 0 and 82%. The average daily minimum temperature is 5 0C in January and the average daily maximum temperature is 35 oC in August. The mean annual rainfall is 425 mm. We measured the diameter at breast height (DBH) from a total of 122 trees. Based on the average DBH, four trees were selected for monitoring (two were above the average DBH and two were below). We measured soil depth in a 1-m grid around each of the four selected trees. We processed soil depths in ArcGIS software (ESRI) to create a soil depth map. We used a Total Station and a differential GPS for the creation of a high resolution DEM of the area covering the four selected trees. We installed soil moisture sensors at 15-cm depth at distances of 1 and 2 m from the selected trees and a second sensor at 30-cm depth when the soil was deeper than 20 cm.. We randomly installed four metric manual rain gauges under each trees' canopy to measure throughfall and for stemflow we installed a plastic tube around each tree trunk and connected it to a manual rain gauge. We used six sap flow heat ratio method instruments to determine sap flow rates of the Pinus brutia trees. Two trees had one sensor installed at 1.3 m height facing north. The remaining trees had two sap

  5. LA PALMA AMARGA (Sabal mauritiiformis, Arecaceae EN SISTEMAS PRODUCTIVOS DEL CARIBE COLOMBIANO: ESTUDIO DE CASO EN PIOJÓ, ATLÁNTICO

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    Viviana Andrade-Erazo

    2015-11-01

    Full Text Available RESUMENLa palma Sabal mauritiiformis es un recurso importante en el Caribe colombiano debido al uso de sus hojas para techar. Para evaluar el estado de sus poblaciones en Piojó (Atlántico, uno de los municipios más productores de hojas, se estudió la densidad y la estructura poblacional de la palma. Se establecieron 16 parcelas de 0,1 ha, en los tres sistemas de uso de suelo más comunes en la zona: ganadería (6, cultivos (5 y rastrojo (5. Se encontró que la palma amarga constituye un recurso silvestre, muy resistente y capaz de adaptarse a ambientes perturbados pues está incorporada en sistemas productivos de cultivos, rastrojos y ganadería, donde las prácticas de manejo influyen en la densidad y estructura de sus poblaciones. La palma es muy resistente y capaz de adaptarse a ambientes perturbados. El área estudiada incluyó 5349 individuos distribuidos en cuatro categorías de tamaño. Los rastrojos (3620 ± 2808 individuos/hectárea y los cultivos (5612 ± 3361 ind/ha presentaron más individuos y mejores estructuras poblacionales que las áreas de ganadería (1488 ± 827 ind/ha, en las cuales se encontraron poblaciones más deterioradas por efecto del pisoteo y el forrajeo. La prevalencia de individuos en algunas clases de tamaño refleja las condiciones de manejo actual e histórico; actividades como el pastoreo o las quemas, sin una apropiada planificación, pueden comprometer el desarrollo de las poblaciones de la palma y la futura disponibilidad del recurso.ABSTRACTThe palm Sabal mauritiiformis is an important resource in the Colombian Caribbean, as its leaves are used for thatching. In order to assess the status of its populations in Piojó (Atlántico department, one of the major leaf producers in the region, palm population structure was studied by randomly establishing 16 sample plots of 0.1 ha in the three major use areas where the palm occurs:: pastures (6, crops (5 and fallows (5. We found that the bitter palm is a

  6. Reproductive biology and early establishment of Pinus elliottii var. elliottii in Brazilian sandy coastal plain vegetation: implications for biological invasion

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    Fernando Campanhã Bechara

    2013-04-01

    Full Text Available Pinus is the most invasive woody taxon, exceeded only by herbaceous plants. This study reports the reproductive biology and early establishment of Pinus elliottii Engelm. var. elliottii, describing its invasive properties in a protected natural area of the Brazilian coastal sandy plains. We evaluated the seed germination and rain, longevity of seed viability and the initial dynamics of the seedlings of Pinus elliottii var elliottii through field and laboratory experiments. We recorded a continuous seed rain of about 204.0 viable seeds m- 2 per year, with a 90 % germination rate. The seeds exhibited a low longevity of viability in the soil and a dense, permanent seedling bank that may explain the high levels of pine invasion. The environmental impact caused by the pine's biological invasion suggests the recommendation for its immediate eradication, together with a restoration plan to restitute the native biodiversity gradually.

  7. Pinus roxburghii plant needles as a three-season biomonitor for elemental air pollution monitoring along roadside

    International Nuclear Information System (INIS)

    The present study deals with the determination of 36 elements in Pinus roxburghii plant needles to assess their potential as biomonitor for elemental air pollution monitoring. The elemental quantification was made by employing Instrumental Neutron Activation Analysis (INAA) and Atomic Absorption Spectrometric (AAS) techniques. The needles of Pinus roxburghii were collected in spring, summer and winter seasons from various sites in Islamabad. The method validation was performed by analyzing two certified reference materials i.e., Citrus leaves - NIST-SRM-1572 and IAEA-Soil-7. Pollution level was assessed by using three indicators: enrichment factor, pollution load index and average toxic element concentration. The results indicated that the needles of Pinus roxburghii plant had potential to monitor the extent of air pollution in the vicinity of high traffic areas.

  8. Transcriptional analysis of Pinus sylvestris roots challenged with the ectomycorrhizal fungus Laccaria bicolor

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    Sederoff Ron

    2008-02-01

    Full Text Available Abstract Background Symbiotic ectomycorrhizal associations of fungi with forest trees play important and economically significant roles in the nutrition, growth and health of boreal forest trees, as well as in nutrient cycling. The ecology and physiology of ectomycorrhizal associations with Pinus sp are very well documented but very little is known about the molecular mechanisms behind these mutualistic interactions with gymnosperms as compared to angiosperms. Results Using a micro-array approach, the relative abundance of 2109 EST transcripts during interaction of Pinus sylvestris roots with the ectomycorrhizal fungus was profiled. The results reveal significant differential expression of a total of 236 ESTs, 96 transcripts differentially abundant after 1 day of physical contact with the fungus, 134 transcripts after 5 days and only 6 after 15 days at early stages of mantle formation on emerging lateral roots. A subset of cell wall modification and stress related genes was further assessed by quantitative reverse transcription PCR at late stages of mycorrhizal development coinciding with Hartig net formation. The results reveal down regulation of gene transcripts involved in general defence mechanism (e.g. antimicrobial peptide as well as those involved in cell wall modification (e.g. glycine rich protein, xyloglucan endo transglycosylase. Conclusion This study constitutes the first attempt to characterize the transcriptome of the plant partner in the Pinus sylvestris – Laccaria bicolor model system. We identified 236 ESTs which are potentially important for molecular regulation of a functional symbiotic association in conifer host. The results highlight similarities with other studies based on angiosperm model systems, nevertheless some differences were found in the timing and spatial scale of gene regulation during ectomycorrhiza development in gymnosperms. The present study has identified a number of potentially important molecular events

  9. Estimativa do comportamento do fogo em queimas experimentais sob povoamentos de Pinus elliottii

    OpenAIRE

    Antonio Carlos Batista; Alexandre Beutling; José Fernando Pereira

    2013-01-01

    Foram realizadas 23 queimas experimentais em um talhão de Pinus elliottii da Estação Experimental de Rio Negro-PR, município de Rio Negro, pertencente à Universidade Federal do Paraná, durante o inverno de 2008. O objetivo desta pesquisa foi desenvolver modelos de previsão do comportamento do fogo para o planejamento de prevenção e combate aos incêndios florestais. Nos locais preparados paras as queimas foram efetuadas observações e medições sobre o material combustível e variáveis meteorológ...

  10. Influência da intensidade do desbaste sobre o crescimento em altura de Pinus elliottii E.

    Directory of Open Access Journals (Sweden)

    Paulo Renato Schneider

    2009-09-01

    Full Text Available Normal 0 21 false false false MicrosoftInternetExplorer4 O presente trabalho estudou a influência da intensidade de desbaste sobre o desenvolvimento da altura média e dominante de povoamentos de Pinus elliottii E., submetidos  a  4 (quatro  tratamentos de desbastes 25, 50 e 75 % da área basal da testemunha sem desbaste, além da testemunha sem desbaste. Os resultados obtidos permitiram concluir que a intensidade do desbaste influi no desenvolvimento da altura média e não no da altura dominante.

  11. Zanimljive vrste makrormiceta u šumama munike (Pinus leucodermis Ant.)

    OpenAIRE

    Tortić, Milica; Sylejmani, Sami

    1982-01-01

    U Jugoslaviji je do sada objavljeno nekoliko radova (vidi engleski tekst), u kojima se navode makromicete koje se razvijaju na drvu endemskog balkanskog bora munike (Pinus leucodermis Ant.), ali je od terestričnih gljiva munikinih šuma spomenuta u literaturi samo jedna vrsta, Rhizopogon luteolus. Autori su u čistoj sastojini munike iznad sedla Prevalac na obroncima Ošljaka (sjeverni ogranak Šar-planine) sabirali više gljive na tlu i drvetu toga bora, pa ovdje izvješćuju o rezultatima svoji...

  12. (14C)-glucose metabolism during shoot bud development in cultured cotyledon explants of Pinus radiata

    International Nuclear Information System (INIS)

    Excised cotyledons of Pinus radiata D. Don cultured under shoot-forming (plus benzyladenine) and non shoot-forming (minus benzyladenine) conditions for 10 and 21 days were fed U-[14C]-glucose for 3 h in the light followed by a 3 h chase period. The labelling of individual metabolites as well as 14C incorporation into protein was assessed. It was found that the general metabolic patterns were qualitatively the same in shoot-forming and non shoot-forming conditions, however, metabolism leading to respiration as well as to the synthesis of some amino acids and protein synthesis was enhanced in the shoot-forming cultures. (author)

  13. Heat-induced colour changes of pine (Pinus pinaster) and eucalypt (Eucalyptus globulus) wood

    OpenAIRE

    Esteves, Bruno; Marques, António Velez; Domingos, Idalina; Pereira, Helena

    2008-01-01

    Heat treatment of Pinus pinaster and Eucalyptus globulus wood was carried out by hot air in an oven for 2–24 h at 170–200 C and by steam in an autoclave for 2–12 h at 190–210 C. The colour parameters L*, a* and b* were determined by the CIELAB method on radial, tangential and transverse sections of untreated and treated wood, and their variation with regard to the treatment (DL*, Da* and Db*) were calculated in percent. For untreated eucalypt wood, lightness (L*) varied betw...

  14. Heat induced colour changes of pine (Pinus pinaster) and eucalypt (Eucalyptus globulus) wood

    OpenAIRE

    Esteves, Bruno

    2008-01-01

    Heat treatment of Pinus pinaster and Eucalyptus globulus wood was made by hot air in an oven during 2 to 24 h at 170-200 ºC and by steam in an autoclave during 2 to 12 h at 190- 210 ºC. The colour parameters L*, a* and b* were determined by the CIELAB method on radial, tangential and transverse sections for untreated and treated wood, and their variation with the treatment (ΔL*, Δa* and Δb*) were calculated in percent. In the untreated woods, for eucalypt wood lightness (L*) varied between...

  15. Essential oil composition variability among natural populations of Pinus mugo Turra in Kosovo

    OpenAIRE

    Hajdari, Avni; Mustafa, Behxhet; Ahmeti, Gresa; Pulaj, Bledar; Lukas, Brigitte; Ibraliu, Alban; Stefkov, Gjoshe; Quave, Cassandra L; Novak, Johannes

    2015-01-01

    Pinus mugo Turra, is a native pine species in central and southern Europe, growing in high mountains area (altitudes 1.800–2.300 m.a.s.l.). In Kosovo, it is one of the native pines too, distributed in high altitudes in the Sharri Mountains and Albanian Alps Mountains. Its populations represent an important wealth of essential oil resources available, which make this species very important in terms of economic values. The chemical composition and yields of the essential oils of dwarf pine (Pin...

  16. Change of the temporal and spatial distribution of precipitation by a tree cover of Pinus pinaser

    International Nuclear Information System (INIS)

    Throughfall and stem flow volume generation was measured over 1 year period in a Pinus pinaster stand 9 years old. Throughfall was measured using 8 collectors in a fixed position connected to a tipping bucket rainfall gauge in a representative 10 x 10 m plot of the forest and stem flow was measured in three trees using a rubber ring around the trunk connected to a tipping bucket rainfall gauge. The two tipping bucket rainfall gauges was connected to a data logger programmed to record data every 5 minutes. (Author) 4 refs.

  17. Estudi del decaïment en Pinus halepensis al Parc de Collserola

    OpenAIRE

    Fité Malla, Xavier; MARTÍNEZ VILALTA, Jordi; Vayreda Duran, Jordi

    2015-01-01

    Aquest és un treball fet amb l'objectiu general d'intentar determinar les causes més probables del decaïment i mort d'un gran nombre de peus de l'espècie Pinus halepensis a la finca de Can Catà (parc natural de Collserola), després dels aprofitaments forestals que s'hi van fer entre agost i novembre de 2012. Com a punt de partida és planteja comparar els patrons de creixement entre els arbres morts i els vius, en relació a les principals variants climàtiques (pluviometria i temperatura, tant ...

  18. Effect of Bursaphelenchus xylophilus on the Assimilation and Translocation of 14 C in Pinus sylvestris

    OpenAIRE

    Melakeberhan, H; Webster, J. M.

    1990-01-01

    The effect of wound, wound + water, wound + Bursaphelenchus xylophilus culture filtrate, or wound + lethal B. xylophilus doses on the assimilation and translocation of ¹⁴C by 8-month-old Pinus sylvestris seedlings was tested. In two separate experiments, pine seedlings were exposed to 28.35 μCi of ¹⁴CO₂ for 20 minutes below or above (to the pine shoot leader) the point of nematode inoculation. After 2 and 4 hours of dark adaptation, 80% ethanol soluble ¹⁴C tissue extracts were determined by l...

  19. CRESCIMENTO INICIAL DE Pinus taeda L. RELACIONADO A DOSES DE N, P E K

    OpenAIRE

    Rudi Witschoreck; Lindolfo Storck; Mauro Valdir Schumacher; Hamilton Luiz Munari Vogel

    2005-01-01

    O presente trabalho teve como objetivo estudar os efeitos de diferentes doses de N, P e K no crescimento inicial de plantas de Pinus taeda, aos 19 meses de idade. O experimento localiza-se próximo do Município de Cambará do Sul, tendo como coordenadas UTM “centrais” 565125 E e 6777386 N. O solo da região é classificado como Cambissolo Humico alumínico típico, textura argilosa. A metodologia estatística utilizada foi a técnica do confundimento, para três fatores, com quatro níveis, totalizando...

  20. Pinus sylvestris as a missing source of nitrous oxide and methane in boreal forest

    OpenAIRE

    Katerina Machacova; Jaana Bäck; Anni Vanhatalo; Elisa Halmeenmäki; Pasi Kolari; Ivan Mammarella; Jukka Pumpanen; Manuel Acosta; Otmar Urban; Mari Pihlatie

    2016-01-01

    Boreal forests comprise 73% of the world’s coniferous forests. Based on forest floor measurements, they have been considered a significant natural sink of methane (CH4) and a natural source of nitrous oxide (N2O), both of which are important greenhouse gases. However, the role of trees, especially conifers, in ecosystem N2O and CH4 exchange is only poorly understood. We show for the first time that mature Scots pine (Pinus sylvestris L.) trees consistently emit N2O and CH4 from both stems and...

  1. Wood ash effects on C and N dynamics of a soil from a Pinus pinaster plantation

    OpenAIRE

    Gómez-Rey, Maria Xesus; Madeira, Manuel; Coutinho, João; Vasconcelos, Ernesto

    2010-01-01

    Effects of wood ash (loose and pelleted) on chemical properties and microbial activity in an Arenosol from a Pinus pinaster plantation were assessed through laboratory incubation. Wood ash was applied at a rate of 0, 4 and 8 g kg-1 soil both alone or together with N. Loose ash significantly increased pH values and extractable nutrients from the soil. Net nitrification was stimulated by it application. Amounts of microbial biomass C were lower in soils with loose ash than in the control. Basal...

  2. Modelos de volumen comercial variable para Pinus patula en Zacualtipán, Hidalgo.

    OpenAIRE

    Hernández Pérez, Disraeli

    2012-01-01

    Se presenta un sistema compatible de ahusamiento y volumen comercial variable para estimar con mayor precisión el volumen total y la distribución de productos maderables en Pinus patula, cultivado en rodales coetáneos, repoblados bajo el sistema de árboles padre. Se utilizaron, de forma destructiva, 78 árboles. La base de datos se sometió a la evaluación de 11 sistemas compatibles de ahusamiento-volumen que incluyen modelos segmentados. Todos los sistemas se ajustaron mediante estimación simu...

  3. Post-Fire Dynamics of Cistus spp. in a Pinus brutia Forest

    OpenAIRE

    TAVŞANOĞLU, Çağatay; GÜRKAN, Behzat

    2005-01-01

    The population dynamics of 2 species of Cistus L. (C. salviifolius L. and C. creticus L.) were studied along a post-fire successional gradient in Pinus brutia Ten. forests in Marmaris National Park, Turkey. The population density of Cistus spp. was 16 individual m-2 at the end of the first year after fire and then decreased exponentially (r2 = 0.926, P < 0.001) the second year after fire to later successional stages. Total projected foliage cover of Cistus spp. was 26% by the end of the fi...

  4. Micropropagation of recalcitrant pine (Pinus pinea L) an overview of the effects of ectomycorrhizal inoculation

    OpenAIRE

    Ragonezi, Carla; Caldeira, Ana Teresa; Martins, María do Rosário; Teixeira, Dora; Silva Dias, Luís; Miralto, Maria Otília; Ganhão, Elsa; Klimaszewska, Krystyna; Zavattieri, Amely

    2012-01-01

    Oral presentation Micropropagation of recalcitrant pine (Pinus pinea L.). An overview of the effects of ectomycorrhizal inoculation Carla Ragonezi1; Ana Teresa Caldeira2 3; Maria do Rosário Martins2,5; Otília Miralto5,6; Luís Silva Dias6; Elsa Ganhão6, Krystyna Klimaszewska4, Amely Zavattieri5,6 1 Plant Breeding and Biotechnology Laboratory, University of Évora, Ap. 94, 7002-554 Évora, Portugal 2 Department of Chemistry, University of Évora, Ap. 94, 7002-554 Évora, Portugal 3...

  5. Dispersal of invasive Pinus strobus in sandstone areas of the Czech Republic

    Czech Academy of Sciences Publication Activity Database

    Hadincová, Věroslava; Münzbergová, Zuzana; Wild, Jan; Šajtar, L.; Marešová, J.

    Leiden: Backhuys Publisher, 2008 - (Tokarska-Guzik, B.; Brock, J.; Brundu, G.; Child, L.; Daehler, C.; Pyšek, P.), s. 117-132 ISBN 978-3-8236-1528-6. [8th International conference Ecology and Management of Alien Plant Invasions.. Silesian University Katowice, Poland (PL), 05.09.2005-12.09.2005] R&D Projects: GA ČR(CZ) GA526/05/0430 Institutional research plan: CEZ:AV0Z60050516 Keywords : dispersal * invasion * Pinus strobus Subject RIV: EF - Botanics

  6. Mitotic instability of Pichia pinus diploid cells 2. Segregation induced by gamma-irradiation

    International Nuclear Information System (INIS)

    Two types of genetic damages resulted from gamma rays in diploid cells of yeasts Pichia pinus MH4: nonlethal damages resulting in increasing frequency of mitotic crossing-over and lethal damages leading to cell death or arising unstable clones have been described. Survaving irradiated cells with lethal damages (which nature is not established) originate ''grown'' colonies which instability is manifested in the increased frequency of segregation of lethal sections and aneuploid segregants; in such colonies segregants without one, two or three nonhomologous chromosomes are often found. It is concluded that losses of separate chromosomes are not those primary damages which result in radiation inactivation of cells

  7. Gas chromatography-mass spectrometry study of sterols from Pinus elliotti tissues.

    Science.gov (United States)

    Laseter, J. L.; Evans, R.; Weete, J. D.; Walkinshaw, C. H.

    1973-01-01

    A comparative study of the sterol components of slash pine (Pinus elliotti) callus tissue cultures, seeds, and seedlings was carried out using GC-MS techniques. Cholesterol, desmosterol, campesterol, stigmasterol, sitosterol and cycloeucalenol were identified in all tissues while lophenol and 24-methylenelophenol were identified in only the seed and seedlings. 24-Ethylidenelophenol was detected in trace concentrations in only the seedlings. Sitosterol was the predominant sterol component, i.e., 80.8, 38.1 and 47.8% of the tissue culture, seed and seedling sterols, respectively.

  8. Fire Burning Characteristics, Attacking Techniques and Safety Precautions in Pinus pumila Scrubs

    Institute of Scientific and Technical Information of China (English)

    2010-01-01

    In China, Pinus pumila is mainly distributed in Daxing’anling, while those growing in the eastern Daxing’anling are primarily covered under the jurisdiction of Huzhong Forest Bureau. P. pumila is an evergreen shrub, 3-6 m high, and always grows vigorously. Its trunks creep along the ground, usually 10 m long or more. It is easily flammable because of the large amounts of resins and volatile oils in its body. Attacking forest fires is a dangerous work, especially in P. pumila scrubs. The fires in P. pumila s...

  9. The allometric model in the stand density management of Pinus pinaster Ait. in Portugal

    OpenAIRE

    Jaime F. Sales Luis,; Fonseca, Teresa

    2004-01-01

    Modèle allométrique pour la gestion de la densité des peuplements de Pinus pinaster Ait., au Portugal. Le modèle allométrique est très convenable pour des applications pratiques, car il donne une expression quasiment correcte d'un nombre de relations, tels que la densité des plants (N) et la dimension moyenne des plants (dg), très utiles dans l'aménagement forestier. Les diagrammes de gestion de la densité sont une procédure simple et efficace pour présenter les relations dimensionnelles comp...

  10. Prirodna obnova u sastojinama alepskog bora (Pinus halepensis Mill.) nakon požara

    OpenAIRE

    Dubravac, Tomislav; Vrbek, Boris; Lalić, Zlatko

    2006-01-01

    U radu se istražuje problematika prirodne obnove opožarenih površina u sastojinama alepskog bora (Pinus halepensis Mill.) na tri trajne pokusne plohe. Rezultati se temelje na petogodišnjem sustavnom motrenju (2001.-2005.) u Šibeniku, trogodišnjem (2001.-2003.) u Splitu te dvogodišnjem (2002.-2003.) na Korčuli. Izmjerom je praćena prirodna obnova vegetacije po vrstama, brojnosti i visinskim klasama te učinci radova njege nakon požara. Istraživanja su obuhvatila pedološku obradu pokusnih plo...

  11. Storage products and tissue interaction in the ovule of Pinus silvestris (L.

    Directory of Open Access Journals (Sweden)

    F. M. Engels

    2014-02-01

    Full Text Available The organel-sequence in ovular cells of Pinus silvestris was investigated by light- and electronmicroscopy during the post-pollination and pre-fertilization period. Changes in starch and lipid storage suppose starch to be a pool for lipid synthesis and a reserve for ovule development. The base nucellus plays an important role in the distribution of metabolites all over the ovular tissues. Lipid, starch and callose are of interest for the cells to protect them against low temperatures by means of isolation, antifreeze and plug formation respectively.

  12. Plasticity in Pinus pinaster populations of diverse origins: Comparative seedling responses to light and Nitrogen availability

    OpenAIRE

    Rodríguez García, Encarna; Bravo Oviedo, Felipe

    2013-01-01

    The effects of light and N availability, and population on seedling morphology and biomass allocation were assessed in eleven months seedlings from ten Pinus pinaster populations. We conducted a garden experiment using a light gradient (full sunlight, HL= 337.1 μmol m2 s-1; medium light, ML= 120.6 μmol m2 s-1; and low light, LL= 30 μmol m2 s-1) and two contrasting soil fertility regimes: low-N and high-N availability. Light availability was an important factor controlling pheno...

  13. ADDITION OF Eucalyptus pellita F. MUELL. BARK TO Pinus elliottii ENGELM PARTICLEBOARD PRODUCTION

    Directory of Open Access Journals (Sweden)

    Edvá Oliveira Brito

    2005-12-01

    Full Text Available This paper evaluated the physical and mechanical properties of particleboards manufactured with Eucalyptus pellitabark added to Pinus elliottii wood. The mechanical properties evaluated were static bending (modulus of rupture and modulus ofelasticity and tensile strength perpendicular to surface, while the physical ones were thickness swelling and water absorption. UreaformaldehydePB 2346 adhesive was used in the rates of 6% and 8%, in particleboard manufacturing. The bark/wood rates were:0/100, 10/90, 20/100 and 30/70, with three repetitions to each treatment. Bark inclusion into particleboard production showed to betechnically possible, according to physical and mechanical results obtained.

  14. Genetic diversity and genetic differentiation of natural populations of Pinus kesiya var. Langbinanensis

    Institute of Scientific and Technical Information of China (English)

    2002-01-01

    Genetic diversity and genetic differentiation of natural populations of Pinus kesiya var. Langbinanensis were examined by means of electrophoresis technique. Analysis of 9 enzyme systems including 16 loci showed that all the three natural populations of the pine were high in genetic diversity but low in inter -population genetic differentiation. The proportion of polymorphic loci is 0.667 , with eachlocus holding 2.13 alleles, averagely. The average expected and obse rved heterozygosity was 0.288 and 0.197, respectively. The gene differentiation among populations was 0.052, but the mean genetic distance was only 0.015.

  15. PRIVATIZAÇÃO DA EDUCAÇÃO NA AMÉRICA LATINA E NO CARIBE: TENDÊNCIAS E RISCOS PARA OS SISTEMAS PÚBLICOS DE ENSINO

    OpenAIRE

    Camilla Croso; Giovanna Modé Magalhães

    2016-01-01

    RESUMO: A observação de distintas formas de privatização da educação na América Latina e no Caribe suscita indagações sobre seu impacto para a realização da educação como um Direito Humano universal. Neste artigo, compartilhamos algumas expressões do fenômeno, a partir especialmente dos dados encontrados no mapeamento Tendencias de la Privatización de la Educación en América Latina y el Caribe , realizado pela Campanha Latino-Americana pelo Direito à Educação (CLADE, 2014). A partir de anális...

  16. Efeito do comprimento do corpo-de-prova na velocidade ultra-sônica em madeiras Effect of the size of the specimen on ultrasonic velocity

    Directory of Open Access Journals (Sweden)

    Fabiana Goia Rosa de Oliveira

    2006-02-01

    Full Text Available O presente artigo apresenta um estudo sobre a variação da velocidade ultra-sônica longitudinal em função do comprimento da peça de madeira. As espécies utilizadas foram: pinus caribaea (Pinus caribaea var. caribaea eucalipto citriodora (Eucalyptus citriodora, eucalipto grandis (Eucalyptus grandis e jatobá (Hymenaea sp. Utilizou-se equipamento de ultra-som com transdutores exponenciais de 22 kHz. Foram feitas medições do tempo de propagação das ondas ultra-sônicas, com o comprimento variando de 300 cm a 10 cm e mantendo-se a seção transversal constante de 12 cm x 5 cm. Os resultados apontaram que ocorre variação da velocidade em função da distância percorrida e do comprimento de onda (lambda utilizado. Conclui-se que adequar a freqüência do transdutor com o comprimento da peça é essencial para a determinação correta da velocidade ultra-sônica em madeiras.This paper reports on a study of the variation of ultrasonic velocity with the length of the specimen of pinus caribaea (Pinus caribaea var. caribaea eucalipto citriodora (Eucalyptus citriodora, eucalipto grandis (Eucalyptus grandis and jatobá (Hymenaea sp. Ultrasonic measurements were taken with an experimental apparatus having 22 kHz transducers. Tests were carried out with length from 300 cm to 10 cm and constant cross-section (12 cm x 5 cm. The results showed that velocity of ultrasonic waves is sensitive to changes in the distance between transducers and wavelength (lambda. The adjustment between the frequency of transducer and the length of the specimen is essential in order to obtain correct measurements of ultrasonic velocity in wood.

  17. Effects of light radiation intensity on photosynthetic characteristics and water use efficiency of Platycladus orientalis and Pinus tabulaeformis seedlings

    Institute of Scientific and Technical Information of China (English)

    ZHANG Weiqiang; HE Kangning; WANG Yunqi; WANG Baitian; DENG Juntao; ZHOU Yi; ZHONG Xijun; LI Zhaoqing

    2007-01-01

    In order to offer a scientific basis for cultivation and management of forests,effects of light radiation intensity on photosynthetic characteristics and water use efficiency of Platycladus orientalis and Pinus tabulaeformis were studied under different soil moisture contents.By adopting artificial control methods to soil moisture,and under simulated photosynthetic radiation (SPR),the net photosynthetic rate (PN),transpiration rate (Tr),water use efficiency (WUE) and intercellular CO2 concentration (Ci,) of Platycladus orientalis and Pinus tabulaeformis in the semi-arid region of the Loess Plateau,were studied.Results are as follows:within the photon range of 0-2,200 μmol/(m2·s),PN,Tr and WUE were enhanced with an increase in SPR in both species.PN and WUE of Platycladus orientalis and Pinus tabulaeformis,however,declined with continued increase in SPR.PN,Tr,WUE and light saturation point (LSP) of Platycladus orientalis were higher than those of Pinus tabulaeformis,while light compensation point (LCP) of Platycladus orientalis was lower than that of Pinus tabulaeformis at the same soil moisture content.The efficiency of light energy utilization of Platycladus orientalis was higher than that of Pinus tabulaeformis;PN,Tr and Ci of Platycladus orientalis and Pinus tabulaeformis were enhanced by increasing soil moisture content,whereas WUE declined.At soil moistures of 7.90%,13.00% and 19.99%,LSP of Platycladus orientalis LCP was 42,25 and 13 μmol/(m2·s) respectively,with corresponding maximal net CO2 photosynthetic rates (Pmax)of 3.04,4.06 and 5.53 μmol(m2·s).At soil moistures of 7.83%,13.04% and 20.15%, the LSP of Pinus tabulaeformis was 1,100, 1,325 and 1,500 μmol/(m2·s) respectively and LCP was 60,30 and 23μmol/(m2·s), with Pmas of 1.08, 3.35 and 4.36 μmol/(m2·s)respectively.

  18. Effect of gamma rays doses on pollen germination, polysiphony and pollen tube elongation in Pinus patula Schiede et Deppe

    International Nuclear Information System (INIS)

    The present study aimed to study the effects of gamma radiation (60Co) on pollen germination and pollen tube elongation in Pinus patula. Pollen germination and pollen tube elongation are stimulated by low doses of radiation. Although higher doses of radiation inhibit the germination of pollen, pollen tube elongation remains unaffected. Thus in Pinus patula pollen tube elongation is less radiosensitive than pollen germination. Compared to control pollen, irradiated pollen produced more number of long pollen tubes. Therefore pollen tube size can be improved using low doses of radiation. (author). 15 refs., 5 figs., 2 tables

  19. Effect of storage conditions on post planting water status and performance of Pinus radiata D. Don stock-types

    OpenAIRE

    Mena-Petite, Amaia; Estavillo, José; Duñabeitia, Miren; González-Moro, Begoña; Muñoz-Rueda, Alberto; Lacuesta, Maite

    2004-01-01

    Effet des conditions de stockage sur l'état hydrique et l'établissement de plantules de Pinus radiata D. Don avec motte et à racines nues. L'étude a porté sur l'effet du stockage sur la qualité du plant et sur les potentialités de survie initiale de plantules de Pinus radiata D. Don à racine nue (BR) et avec motte (PR), replantées dans des sols humides et secs. Les plantules ont subi un stress de transplantation, même dans des conditions hydriques optimales. Malgré la diminution de la transpi...

  20. Condiciones de trabajo psicosociales y desgaste psíquico en trabajadores de diversos sectores empresariales de centro-oriente, suroccidente y región Caribe en Colombia

    OpenAIRE

    2014-01-01

    Objetivo: Determinar la percepción de trabajadores de distintos sectores empresariales de Colombia sobre los factores psicosociales presentes en su entorno laboral y la relación entre los factores psicosociales nocivos y los síntomas subjetivos y alteraciones de la salud. Materiales y métodos: Estudio no experimental, transversal y cuantitativo. Participaron 370 trabajadores, de diferentes sectores empresariales de Colombia (Centro-Oriente, Suroccidente y región Caribe). Instru...

  1. Rapid changes in induced non-volatile secondary metabolites in damaged Pinus massoniana Lamb.

    Institute of Scientific and Technical Information of China (English)

    Qin REN; Yongjian HU; Youju JIN; Wenhong DENG; Zhenyu LI; Li YANG; Mwange Kalima NKOMA

    2008-01-01

    Plants initiate the development of defense mechanisms as soon as pests start to cause damage to them. In order to have a thorough understanding of the physiological mechanisms of the Pinus massoniana self-defense mechanism, and to provide a theoretical founda-tion for an effective ecological management of this plant, levels of tannin, polyamine and phenolic acids were ana-lyzed in undamaged (UDL), insect-damaged (IDL) and artificially-damaged (ADL) leaves at different times. Results show that, although the content of tannin signifi-cantly increased in IDL and ADL compared to UDL, its peaks appeared earlier in ADL than in IDL treatment. Tannin concentration substantially increased again 48 h after IDL treatment. On the other hand, the damage mode considerably affected putrescine and spermidine levels in leaves. Their concentrations in IDL plants remained higher than in UDL after a relatively long time (72 h), but spermine was barely detected in any of the samples. In general, total content of phenol acids significantly increased in damaged leaf treatments (ADL and IDL), with a higher level in IDL for most of the investigated phenolic acids, except for ferulic acid. Our study showed that, when damaged by insects, Pinus massoniana rapidly produces substances required in resistance induction to insects in order to insure its self-protection.

  2. Effect of Pinus radiata derived biochars on soil sorption and desorption of phenanthrene

    Energy Technology Data Exchange (ETDEWEB)

    Zhang Honghua [College of Biological and Environmental Engineering, Zhejiang University of Technology, Hangzhou 310032 (China); Lin Kunde, E-mail: lin.kunde@gamil.co [College of Biological and Environmental Engineering, Zhejiang University of Technology, Hangzhou 310032 (China); Department of Environmental Sciences, University of California, Riverside, CA 92521 (United States); Wang Hailong [Scion, Private Bag 3020, Rotorua 3046 (New Zealand); Gan, Jay [Department of Environmental Sciences, University of California, Riverside, CA 92521 (United States)

    2010-09-15

    Biochars are anthropogenic carbonaceous sorbent and their influences on the sorption of environmental contaminants need to be characterized. Here we evaluated the effect of Pinus radiata derived biochars on soil sorption and desorption of phenanthrene. Two biochars separately produced at 350 {sup o}C and 700 {sup o}C and three soils were tested. Biochar amendment generally enhanced the soil sorption of phenanthrene. The biochar produced at 700 {sup o}C generally showed a greater ability at enhancing a soil's sorption ability than that prepared at 350 {sup o}C. The single-step desorption measurement showed an apparent hysteresis in biochar-amended soils. After 28 d equilibration, the sorptive capacity of biochar-amended soil (with an organic carbon content of 0.16%) significantly decreased. This study clearly suggested that biochar application enhanced soil sorption of hydrophobic organic compounds, but the magnitude of enhancement depended on the preparation of biochars, the indigenous soil organic carbon levels, and the contact time between soil and biochar. - Pinus radiata derived biochars influence soil sorption and desorption of phenanthrene.

  3. Energy characterization of fresh and torrified pellets produced from Pinus waste wood

    Directory of Open Access Journals (Sweden)

    Thiago de Paula Protásio

    2015-12-01

    Full Text Available he objective of this research was to evaluate torrified and fresh pellets produced from Pinus waste wood, used for direct generation of thermal energy. The compaction of Pinus sp. waste wood from lumbermill was performed in a pelletizer with a planar array of 8 mm. Roastings were performed in an electric furnace, type muffle, stabilized at final temperatures of 220 °C and 250 °C for 30 min. The following pellets properties were determined: apparent and unit energy density, bulk density, energy bulk density, immediate chemical composition (volatile materials, ash and fixed carbon, high heating value and moisture. It was observed an increase in high heating value and reduction of moisture content of torrified pellets. However, the gain in calorific value was less than the mass loss of the pellets after roasting, reducing the energy densities of the pellets. The pellets raw have marketing potential in European countries such as Germany, Austria and Sweden. The methodology used for roasting is not suitable for pellets heat treatment. However, further research on pellet roasting in a wider temperature and residence time range is recommended, in order to define parameters that optimize their energetic properties.

  4. Using Landsat satellite imagery to detect small-size forest stands of Pinus nigra Arn. and Pinus sylvestris L. affected by Scolytidae; Uso de imagenes satelite Landsat para la deteccion de rodales de Pinus nigra Arn. y Pinus sylvestris L. afectados por escolitidos

    Energy Technology Data Exchange (ETDEWEB)

    Blanco, E.; Bonet, J. A.; Eizaguirre, M.

    2009-07-01

    Medium resolution images from multispectral sensors like Landsat TM have been extensively used for decades in order to identify decline and defoliation generated by insects and other forest pests. The present work analyses the usefulness of these kinds of images to detect small-size stands of Pinus nigra Arn. and Pinus sylvestris L. affected by Scolytidae attacks. The study area was located in the Solsones region (Eastern Pyrenees), selecting 34 training zones (17 damaged small-size stands and 17 healthy small-size stands). The exploratory analysis of the images was conducted with the ERDAS IMAGINE 8.x. program.The results of the study showed significant differences between the affected and non-affected stands in 5 of the 7 spectral bands analysed. TM5 and TM7 bands were identified as those having the highest power to detect damaged stands. The digital levels obtained and the spaces of characteristics created, both showed trends to group small-size affected stands versus healthy, achieving improvements in the methodological procedure employed. (Author) 31 refs.

  5. Liming and fertilisation in Pinus taeda plantations with severe nutrient deficiency in savanna soils

    Directory of Open Access Journals (Sweden)

    Araína Hulmann Batista

    2014-11-01

    Full Text Available Soils with high acidity and low exchangeable bases may be responsible for low yields of Pinus taeda in a forest plantation at Jaguariaíva, Paraná State, Brazil. The aim of this study was to evaluate the effect of liming and fertilisation, applied over litter, on two selected areas with Pinus taeda plantations. Soil, litter and pine needles were evaluated for K, Ca and Mg concentrations and soil acidity parameters. Seven treatments were applied: (i complete (N, P, K, Zn, Cu, B, Mo, and lime; (ii without N, P, and K; (iii without Zn, Cu, B, and Mo; (iv without K; (v without Zn; (vi without lime; and (vii control (without nutrients and lime. Soil samples were collected at five soil depths (0-5, 5-10, 10-20, 20-40 and 40-60 cm simultaneously with litter samples. Needles were also collected from the first and second pine flushes. Liming induced soil pH, Ca2+, and Mg2+ increases, and the opposite was observed for Al3+ and Al saturation. Fertilisation increased soil exchangeable K+ concentrations and needle and litter K concentrations. The low Ca and Mg concentrations found in the plant needles might be attributable to their low mobility.

  6. Ecophysiological responses of Pinus leucodermis at high elevation in the Mediterranean area

    Directory of Open Access Journals (Sweden)

    Guerrieri MR

    2008-03-01

    Full Text Available Pinus leucodermis Antoine (= Pinus heldreichii var. leucodermis is a species of the Balkan flora which in Italy grows in a small area between the Regions of Basilicata and Calabria, in the Pollino National Park. A relict of the oro-Mediterranean Tertiary forests, it is found from the lower vegetation belt, where it is mixed with evergreen sclerophyllous vegetation, up to the alpine vegetation belt beyond the closed formations of Fagus sylvatica, where it makes up stands with very old, isolated and big trees growing in open spaces between rocks. The ecophysiological and dendrochronolgy features of the P. leucodermis stands growing on the west slope of Serra di Crispo (Monte Pollino, between 1800 and 2000 m a.s.l., have been studied during recent years and some of the results are presented in this work. Ecophysiological measurements in situ show that reduced atmospheric vapour pressure deficit conditions, due to humid currents from the western Tyrrhenian Sea, allow the trees to escape from summer drought. When day summer weather conditions are optimal P. leucodermis exhibits a remarkable photosynthetic activity and adaptation to high irradiance. The tree ring width chronology documents a marked reduction of radial growth from 1950 to 1985, followed by a strong recovery, still continuing. In the same period differences between the annual minimum and maximum temperatures tend to increase. Anthropic and grazing pressure is reduced markedly after the institution of the National Park of Pollino.

  7. CRESCIMENTO INICIAL DE Pinus taeda L. RELACIONADO A DOSES DE N, P E K

    Directory of Open Access Journals (Sweden)

    Rudi Witschoreck

    2005-06-01

    Full Text Available O presente trabalho teve como objetivo estudar os efeitos de diferentes doses de N, P e K no crescimento inicial de plantas de Pinus taeda, aos 19 meses de idade. O experimento localiza-se próximo do Município de Cambará do Sul, tendo como coordenadas UTM “centrais” 565125 E e 6777386 N. O solo da região é classificado como Cambissolo Humico alumínico típico, textura argilosa. A metodologia estatística utilizada foi a técnica do confundimento, para três fatores, com quatro níveis, totalizando 64 tratamentos, distribuídos em quatro blocos. Foram medidas as seguintes variáveis no campo: altura total, altura de copa, diâmetro à altura do colo e diâmetro de copa. Os resultados indicam que foi obtida resposta linear e quadrática significativa para o P, evidenciando a importância da aplicação desse nutriente no crescimento inicial das plantas de Pinus taeda, com máximo ganho em volume cilíndrico, nas doses de 64 e 87 kg ha-1 de P2O5 e K2O respectivamente.

  8. Crystallization and initial crystallographic characterization of a vicilin-type seed storage protein from Pinus koraiensis

    International Nuclear Information System (INIS)

    In this study, the Korean pine (Pinus koraiensis) vicilin-type 7S seed storage protein was isolated from defatted pine-nut extract and purified by sequential gel-filtration and anion-exchange chromatography. Well diffracting single crystals were obtained by the vapour-diffusion method in hanging drops. The cupin superfamily of proteins includes the 7S and 11S seed storage proteins. Many members of this family of proteins are known allergens. In this study, the Korean pine (Pinus koraiensis) vicilin-type 7S seed storage protein was isolated from defatted pine-nut extract and purified by sequential gel-filtration and anion-exchange chromatography. Well diffracting single crystals were obtained by the vapor-diffusion method in hanging drops. The crystals belong to the primitive cubic space group P213, with unit-cell parameters a = b = c = 148.174 Å. Two vicilin molecules were present in the asymmetric unit and the Matthews coefficient was determined to be 2.90 Å3 Da−1, with a corresponding solvent content of ∼58%. A molecular-replacement structural solution has been obtained using the program Phaser. Refinement of the structure is currently under way

  9. The complete chloroplast genome of the Taiwan red pine Pinus taiwanensis (Pinaceae).

    Science.gov (United States)

    Fang, Min-Feng; Wang, Yu-Jin; Zu, Yu-Meng; Dong, Wan-Lin; Wang, Ruo-Nan; Deng, Tuan-Tuan; Li, Zhong-Hu

    2016-07-01

    The complete nucleotide sequence of the Taiwan red pine Pinus taiwanensis Hayata chloroplast genome (cpDNA) is determined in this study. The genome is composed of 119,741 bp in length, containing a pair of very short inverted repeat (IRa and IRb) regions of 495 bp, which was divided by a large single-copy (LSC) region of 65,670 bp and a small single-copy (SSC) region of 53,080 bp in length. The cpDNA contained 115 genes, including 74 protein-coding genes (73 PCG species), 4 ribosomal RNA genes (four rRNA species) and 37 tRNA genes (22 tRNA species). Out of these genes, 12 harbored a single intron, and one (rps12) contained a couple of introns. The overall AT content of the Taiwan red pine cpDNA is 61.5%, while the corresponding values of the LSC, SSC and IR regions are 62.2%, 60.6% and 63.6%, respectively. A maximum parsimony phylogenetic analysis suggested that the genus Pinus, Picea, Abies and Larix were strongly supported as monophyletic, and the cpDNA of P. taiwanensis is closely related to that of P. thunbergii. PMID:26057016

  10. Modeling Dominant Height Growth in Planted Pinus pinea Stands in Northwest of Tunisia

    Directory of Open Access Journals (Sweden)

    Sghaier Tahar

    2012-01-01

    Full Text Available Six generalized algebraic difference equations (GADAs derived from the base models of log-logistic, Bertalanffy-Richards, and Lundqvist-Korf were used to develop site index model for Pinus pinea plantations in north-west of Tunisia. To assure the base-age invariance of the model parameter estimates, a dummy variable approach was used. Data from stem analysis, corrected with Carmean's method, were used for modelling. To take into account the inherent autocorrelation of the longitudinal data, a second-order continuous-time autoregressive error structure was used, which allows the models to be applied to irregularly spaced, unbalanced data. Both a qualitative analysis based on the biological realism of the models and numerical and graphical analyses based on the accuracy of the models as well were used to evaluate the performance of candidate models. The relative error in site index predictions was used to select 30 years as the best reference age. Based on the analysis, a generalized algebraic difference equation (GADA derived from the base model of Lundqvist-Korf realized the best compromise between biological and statistical constraints, producing the most adequate site index curves. It is a polymorphic model with site-dependent asymptotes. This model is therefore recommended for height growth prediction and site classification of Pinus pinea plantations in north-west of Tunisia.

  11. Interpopulation genetic-ecological variation of Scots pine (Pinus sylvestris L. in Serbia

    Directory of Open Access Journals (Sweden)

    Lučić Aleksandar

    2011-01-01

    Full Text Available The genetic-ecological variation of Scots pine (Pinus sylvestris L. in Serbia was studied in the populations at five localities in western and south-western Serbia. Three groups of Scots pine (Pinus sylvestris L. populations were differentiated based on genetic research (seed protein analysis and plant community research. The first group consists of Scots pine populations on Šargan (FMU “Šargan“ and on Tara (FMU “Kaluderske Bare”, where the forests belong to the community of Scots pine and Austrian pine (Pinetum sylvestris-nigrae Pavlovic 1951. The second group covers the localities Stolovi (FMU “Radocelo-Crepuljnik“ and Zlatar (FMU “Zlatar I“, where the forests belong to the community of Scots pine and spruce (Piceo abietis-Pinetum sylvestris Stefanovic 1960. The third group comprises the Scots pine population on Pešter (FMU “Dubocica-Bare“ which belongs to the community of Scots pine with erica (Erico-Pinetum sylvestris Stefanovic 1963. Cluster analysis was performed on the basis of seed protein data and showed that there are three groups of Scots pine populations. The three populations coincide with plant communities. The community of Scots pine with erica (Erico-Pinetum sylvestris Stefanovic 1963 recorded on Pešter at the locality “Dubocica- Bare“ in the area of FE “Golija“ Ivanjica, is a special Scots pine population displayed at the greatest distance from all other populations in the cluster analysis dendrogram.

  12. Photosynthetic temperature adaptation of Pinus cembra within the timberline ecotone of the Central Austrian Alps.

    Science.gov (United States)

    Wieser, Gerhard; Oberhuber, Walter; Walder, Lisa; Spieler, Daniela; Gruber, Andreas

    2010-04-01

    Temperature is suggested to determine the upper limit of tree life. Therefore, future climate warming may be of importance for tree distribution within the European Alps, where low temperatures limit carbon metabolism.We focused on the effects of air and soil temperature on net photosynthesis (P(n)) of Pinus cembra an evergreen climax species of the timberline ecotone of the Central Austrian Alps. Light response and temperature response curves were estimated along an altitudinal gradient ranging from the forest limit up to the krummholz limit in both summer and fall.In general, P(n) was significantly lower in fall as compared to summer. Nevertheless, independent from season mean P(n) values tended to increase with elevation and were positively correlated with root zone temperatures. The specific leaf area by contrast declined with increasing elevation. Furthermore, the temperature optimum of net photosynthesis declined with increasing elevation and was positively correlated with the mean maximum air temperature of the 10 days prior the date of measurement.Thus, our findings appear to reflect a long-term adaptation of the photosynthetic apparatus of Pinus cembra to the general temperature conditions with respect to elevation combined with a short term acclimation to the prevailing temperature regime. PMID:21379394

  13. Effect of two successive wildfires in Pinus halepensis stands of central Greece

    Directory of Open Access Journals (Sweden)

    Y. Spanos

    2008-05-01

    Full Text Available We estimated differences, five years after a wildfire, in soil and vegetation between Pinus halepensis stands that were once burnt (1998 and stands that were burnt twice in a short time interval (1995 and 1998, in the area of Penteli, central Greece. The parameters monitored were the physical and chemical attributes of upper soil layer and the vegetation composition, density and height. The results showed that five years after the wildfire, soil pH did not differ between areas burnt once and twice, while the organic matter was higher in the once-burnt areas. The vegetation composition was similar in the two areas and the dominant species were those pre-existing the fire. On the contrary, vegetation density was considerably lower in the twice-burnt areas. The height of woody species oscillated in the same levels in the two areas. The plant community was composed mainly by resprouting species, like Quercus coccifera, Pistacia lentiscus, or Phillyrea latifolia, and less individuals from seed-regenerated species, like Pinus halepensis, Cistus monspeliensis, and C. creticus. It is suggested that the recurrence of wildfire affected negatively the ecosystem attributes, and contributed to the increased risk of degradation.

  14. Photosynthesis, chloroplast pigments, and antioxidants in Pinus canariensis under free-air ozone fumigation

    International Nuclear Information System (INIS)

    High O3 levels, driving uptake and challenging defense, prevail on the Canary Islands, being associated with the hot and dry summers of the Mediterranean-type climate. Pinus canariensis is an endemic conifer species that forms forests across these islands. We investigated the effects of ozone on photosynthesis and biochemical parameters of P. canariensis seedlings exposed to free-air O3 fumigation at Kranzberg Forest, Germany, where ambient O3 levels were similar to those at forest sites in the Canary Islands. The twice-ambient O3 regime (2xO3) neither caused visible injury-like chlorotic or necrotic spots in the needles nor significantly affected violaxanthin, antheraxanthin and zeaxanthin levels and the de-epoxidation state of the xanthophyll cycle. In parallel, stomatal conductance for water vapour, net photosynthesis, intercellular CO2 concentration, chlorophyll fluorescence parameters, as well as antioxidant levels were hardly affected. It is concluded that presently prevailing O3 levels do not impose severe stress on P. canariensis seedlings. - Twice-ambient ozone does not significantly affect the physiological behavior of Pinus canariensis seedlings

  15. Production of laminated veneer lumber LVL using veneer of Schizolobium amazonicum, Eucalyptus saligna and Pinus taeda

    Directory of Open Access Journals (Sweden)

    Setsuo Iwakiri

    2010-12-01

    Full Text Available This research evaluated the quality of laminated veneer lumber - LVL manufactured with veneers of Schizolobium amazonicum (paricá, Eucalyptus saligna and Pinus taeda. The LVL panels were manufactured in the laboratory conditions composed by seven veneers, 2,0 mm thickness, with different structural compositions, using phenol-formaldehyde resin. The veneers of Schizolobium amazonicum- paricá- were pre-classified by using stress wave machine. The veneers of Eucalyptus saligna and Pinus taeda were disposed in the face layer to reinforce the structural strength of LVL panels. The LVL quality was evaluated using glue line shear strength and static bending test (MOE and MOR, edge and flat. Grading of paricá veneers based on MOEd did not affected significantly the results of the glue line shear strength and MOE and MOR edge. For the MOE and MOR flat, the use of veneers of MOEd grade 1 contributed significantly to increasing the average values of these properties. In the same way, using the Eucalyptus saligna veneers on the face of LVL resulted in higher average values of MOE and MOR, edge and flat.

  16. Short Communication. Physiological effects of Rhizopogon Roseolus on Pinus halepensis seedlings

    Directory of Open Access Journals (Sweden)

    J.A. Alfonso Domínguez Núñez

    2013-12-01

    Full Text Available Aim of study: The inoculation of forest seedlings with ectomycorrhizal fungi can improve the morphological and physiological qualities of plants, especially those used for regeneration of arid areas. Rhizopogon roseolus is an ectomycorrhizal fungus (ECM commonly used for reforestation. In this study, the specific objectives were to know some morphophysiological effects of Rhizopogon Roseolus on Pinus halepensis seedlings under standard nursery conditionsArea of study: ETSI Montes and EUIT Forestal, Madrid.Material and Methods: In nursery, under well watered conditions and peat growing substrates, Aleppo pine seedlings were inoculated with R. roseolus. Five months after the inoculations, we examined the growth, water parameters (osmotic potential at full turgor [Ψπfull], osmotic potential at zero turgor [Ψπ0], and the tissue modulus of elasticity near full turgor [Emax], mycorrhizal colonization, and concentration and content of macronutrients in the seedlings. Subsequently, a trial was conducted to assess the root growth potential.Main results: The mycorrhization decreased the height and diameter of mycorrhizal seedlings but increased the root weight and root branching. R. roseolus did not cause any significant effect on the regeneration of new roots or on any of the tested hydric parameters, but it did improve N uptake of the seedlings.Research highlights: The mycorrhizal inoculation increased the N uptake. The mycorrhizal inoculation caused opposite effects on some growth parametersKeywords: Osmotic adjustment; elastic adjustment; mineral nutrition; root growth potential; nursery; Rhizopogon roseolus;  Pinus halepensis. 

  17. Molecular characterization of zeta class glutathione S-transferases from Pinus brutia Ten.

    Indian Academy of Sciences (India)

    E. Oztetik; F. Kockar; M. Alper; M. Iscan

    2015-09-01

    Glutathione transferases (GSTs; EC 2.5.1.18) play important roles in stress tolerance and metabolic detoxification in plants. In higher plants, studies on GSTs have focussed largely on agricultural plants. There is restricted information about molecular characterization of GSTs in gymnosperms. To date, only tau class GST enzymes have been characterized from some pinus species. For the first time, the present study reports cloning and molecular characterization of two zeta class GST genes, namely PbGSTZ1 and PbGSTZ2 from Pinus brutia Ten., which is an economically important pine native to the eastern Mediterranean region and have to cope with several environmental stress conditions. The PbGSTZ1 gene was isolated from cDNA, whereas PbGSTZ2 was isolated from genomic DNA. Sequence analysis of PbGSTZ1 and PbGSTZ2 revealed the presence of an open reading frame of 226 amino acids with typical consensus sequences of the zeta class plant GSTs. Protein and secondary structure prediction analysis of two zeta class PbGSTZs have shared common features of other plant zeta class GSTs. Genomic clone, PbGSTZ2 gene, is unexpectedly intronless. Extensive sequence analysis of PbGSTZ2, with cDNA clone, PbGSTZ1, revealed 87% identity at nucleotide and 81% identity at amino acid levels with 41 amino acids differences suggesting that genomic PbGSTZ2 gene might be an allelic or a paralogue version of PbGSTZ1.

  18. High seed dispersal ability of Pinus canariensis in stands of contrasting density inferred from genotypic data

    Directory of Open Access Journals (Sweden)

    Unai López de Heredia

    2015-04-01

    Full Text Available Aim of the study: Models that combine parentage analysis from molecular data with spatial information of seeds and seedlings provide a framework to describe and identify the factors involved in seed dispersal and recruitment of forest species. In the present study we used a spatially explicit method (the gene shadow model in order to assess primary and effective dispersal in Pinus canariensis. Area of study: Pinus canariensis is endemic to the Canary Islands (Spain. Sampling sites were a high density forest in southern slopes of Tenerife and a low density stand in South Gran Canaria. Materials and methods: We fitted models based on parentage analysis from seeds and seedlings collected in two sites with contrasting stand density, and then compared the resulting dispersal distributions. Main results: The results showed that: 1 P. canariensis has a remarkable dispersal ability compared to other pine species; 2 there is no discordance between primary and effective dispersals, suggesting limited secondary dispersal by animals and lack of Janzen-Connell effect; and 3 low stand densities enhance the extent of seed dispersal, which was higher in the low density stand. Research highlights: The efficient dispersal mechanism of P. canariensis by wind inferred by the gene shadow model is congruent with indirect measures of gene flow, and has utility in reconstructing past demographic events and in predicting future distribution ranges for the species.

  19. Photosynthetic response of Pinus sylvestriformis to elevated carbon dioxide and its influential factor analysis

    Institute of Scientific and Technical Information of China (English)

    2000-01-01

    The photosynthetic response of 12-year old Pinus sylvestriformis to elevated CO2 and its influential factors were tested and analyzed in the forest region of Changbai Mountain in 1999. Trees grown at the natural condition were controlled at three levels of CO2 concentration (350 μL.L-1·, 500 μL.L -1 and 700 μL.L-1) by CO2 rich settlement designed by us. Net photosynthetic rates (NPR), temperature, relative humidity, stomatal conductance, intercellular CO2 concentration and photosynthetic active radiation (PAR) were measured at 6:00, 8:00, 10:00, 14:00, 16:00 and 18:00 hours a day. Experimental results showed that the NPR of Pinus sylvestriformis increased by 32.6% and 123.0% at 500 μL.L-1 and 700 μL.L-1 CO2 concentration respectively, compared to ambient atmospheric CO2 concentration (350 μL.L-1). The relations between NPR and influential factors, including temperature, relative humidity, intercellular CO2 concentration and photosynthetic active radiation, were analyzed respectively by regression analysis at different CO2 concentrations.

  20. Biogeochemical assessment of environmental risk by the example of Pinus sylvestris L.

    Directory of Open Access Journals (Sweden)

    Rybakov Dmitry Sergeevich

    2016-06-01

    Full Text Available The possibility of using annual rings of Pinus sylvestris L. to assess chemical pollution in the Republic of Karelia is discussed. With the help of principal component factor analysis the relationship between the contents of chemical elements and dendrological parameters – the width of annual rings and wood density - was revealed. The main factors contributing to the pollution of the northern part of the Republic of Karelia by the emission from iron-ore enterprise JSC «Karelsky Okatysh» are frequent ecologically significant wind directions, the distance from the source and the total mass of the emission. The value of radial growth (the average width of annual rings for five-years of Pinus sylvestris L. is connected negatively with the content of Cu, Cd, Ni and Fe. As an element of nutrition, Mn is positively correlated with the density of wood wherein it is an antagonist of Fe and partially of Cr in northern areas . Several peaks of Pb content coincide with the most intense tests of atomic weapons. Sharp maximums of Pb can also be due to a cross-border pollution and emission from regional sources.

  1. Orthogonal cutting forces in juvenile and mature Pinus taeda wood Forças de corte ortogonal na madeira juvenil e adulta de Pinus taeda

    Directory of Open Access Journals (Sweden)

    Raquel Gonçalves

    2005-08-01

    Full Text Available The distinct characteristics of juvenile and mature woods, which are observed particularly in softwoods, have an influence on processing due to their different mechanical resistance properties in relation to cutting operations. In the past, when most of the wood used industrially came from adult trees of natural forests, little importance was given to a distinction between different zones of the tree stem. At present, however, as the supply of mature trees with large diameters from native forests is constantly decreasing, the use of short-cycle trees has become a common practice, through the adoption of species that grow relatively fast, such as pines and eucalyptus. In both softwoods and hardwoods, juvenile wood cells are generally smaller and thinner than in mature wood, and this reflects on their density and mechanical resistance, which should have an effect on the cutting forces developed during processing. The main object of this research was to evaluate orthogonal cutting forces in juvenile and mature Pinus taeda woods. Cutting force magnitude differences were observed for those two regions of the trunk, with parallel cutting forces being 33.4% higher, on average, at the mature wood region for 90-0 cutting, and 12% higher for 90-90 cutting. This result is consistent with the distinct anatomical structures of the material, since the forces developed during machining depend directly upon its properties.As características distintas dos lenhos juvenil e adulto, existentes principalmente na formação das coníferas, influenciam na usinagem devido às diferentes propriedades de resistência mecânica ao corte. No passado, quando a maior parte da madeira utilizada industrialmente era proveniente de árvores adultas de florestas naturais, pouca importância era dada à diferenciação de zonas no tronco. Atualmente, no entanto, com o decréscimo constante do suprimento de árvores adultas de grandes diâmetros, provenientes de florestas nativas

  2. Response of needle dark respiration of Pinus koraiensis and Pinus sylvestriformis to elevated CO2 concentra-tions for four growing seasons’ exposure

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    The long-term effect of elevated CO2 concentrations on needle dark respiration of two coniferous spe- cies—Pinus koraiensis and Pinus sylvestriformis on the Changbai Mountain was investigated using open-top chambers. P. koraiensis and P. sylvestriformis were exposed to 700, 500 μmol·mol-1 CO2 and ambient CO2 (approx. 350 μmol·mol-1) for four growing seasons. Needle dark respiration was meas- ured during the second, third and fourth growing seasons’ exposure to elevated CO2. The results showed that needle dark respiration rate increased for P. koraiensis and P. sylvestriformis grown at elevated CO2 concentrations during the second growing season, could be attributed to the change of carbohydrate and/or nitrogen content of needles. Needle dark respiration of P. koraiensis was stimu- lated and that of P. sylvestriformis was inhibited by elevated CO2 concentrations during the third growing season. Different response of the two tree species to elevated CO2 mainly resulted from the difference in the growth rate. Elevated CO2 concentrations inhibited needle dark respiration of both P. koraiensis and P. sylvestriformis during the fourth growing season. There was consistent trend be- tween the short-term effect and the long-term effect of elevated CO2 on needle dark respiration in P. sylvestriformis during the third growing season by changing measurement CO2 concentrations. How- ever, the short-term effect was different from the long-term effect for P. koraiensis. Response of dark respiration of P. koraiensis and P. sylvestriformis to elevated CO2 concentrations was related to the treatment time of CO2 and the stage of growth and development of plant. The change of dark respiration for the two tree species was determined by the direct effect of CO2 and long-term acclimation. The prediction of the long-term response of needle dark respiration to elevated CO2 concentration based on the short-term response is in dispute.

  3. Correlation between infection by ophiostomatoid fungi and the presence of subterranean termites in Loblolly pine (Pinus taeda L.) roots

    Science.gov (United States)

    Observations of subterranean termites feeding in pine sapwood containing ophiostomatoid fungi prompted a study to investigate the effect of infection by Leptographium fungi on the probability of encountering subterranean termites in loblolly pine (Pinus taeda L.) roots. Root samples were collected f...

  4. 75 FR 42033 - Endangered and Threatened Wildlife and Plants; 90-Day Finding on a Petition to List Pinus albicaulis

    Science.gov (United States)

    2010-07-20

    ... that in the Rocky Mountains, the highest mortality from white pine blister rust generally occurs in...-caused landscape fragmentation. As a high-elevation, long-lived species with limited mobility, P... published in the Federal Register on January 27, 1994 (59 FR 3824). Species Information Pinus albicaulis...

  5. 76 FR 42631 - Endangered and Threatened Wildlife and Plants; 12-Month Finding on a Petition To List Pinus...

    Science.gov (United States)

    2011-07-19

    ... rust and mountain pine beetle predation. As forests become more dense, individual Pinus albicaulis are... and mountain pine beetles, have created more homogenous forest stands with reduced numbers of P..., snow drifts around P. albicaulis trees, thereby increasing soil moisture, modifying soil...

  6. Improved recruitment and early growth of Scots pine (Pinus sylvestris L.) seedlings after fire and soil scarification.

    NARCIS (Netherlands)

    Hille, M.G.; Ouden, den J.

    2004-01-01

    The success of seedling recruitment of Scots pine (Pinus sylvestris L.) is strongly dependent on soil surface properties, such as humus depth and moisture content. In an undisturbed forest floor, seedlings are seldom able to become established due to the high incidence of desiccation in the organic

  7. Research on Assessment Method of Economic Performances of Provenance Trial and Popularization Project of Pinus massoniana L.

    Institute of Scientific and Technical Information of China (English)

    YANGZhangqi; WENZhihong

    2004-01-01

    Applying the economic principles, this article carries out the assessment of economic performances brought by forestry research achievement through research and discussion on the assessment method of economic performances of provenance popularization of Pinus massoniana L. The article also brings in the option method to fully display the value of forest research achievement.

  8. Impact of Experimentally Elevated Ozone on Seed Germination and Growth of Russian Pine (Pinus sylvestris) and Spruce (Picea spp.) Provenances

    NARCIS (Netherlands)

    Prozherina, Nadezda; Nakvasina, Elena; Oksanen, Elina

    2009-01-01

    The impact of elevated ozone concentrations on early ontogenetic stages of pine (Pinus sylvestris) and spruce (Picea abies, Picea obovata, P. abies X P. obovata) seedlings originating from different provenances in Russia were studied in the open-field ozone fumigation system located in Kuopio, Finla

  9. Can we expect to protect threatened species in protected areas? A case study of the genus Pinus in Mexico

    NARCIS (Netherlands)

    J. Aguirre Gutiérrez; J.F. Duivenvoorden

    2010-01-01

    The distribution of 56 Pinus species in Mexico was modelled with MAXENT. The pine species were classified as threatened according to IUCN criteria. Our aim was to ascertain whether or not threatened pine species were adequately represented in protected areas. Almost 70% of the species had less than

  10. In vitro zygotic embryo culture of Pinus peuce Gris.: Optimization of culture conditions affecting germination and early seedling growth

    Directory of Open Access Journals (Sweden)

    Stojičić Dragana

    2012-01-01

    Full Text Available This study reports a protocol for the germination and early seedling growth of Pinus peuce Gris. using zygotic embryo culture. In order to overcome seed dormancy and optimize organogenesis, the effect of nutritional, plant growth regulatory and physical factors on in vitro germination and growth of isolated mature zygotic embryos of P. peuce were investigated.

  11. In vitro zygotic embryo culture of Pinus peuce Gris.: Optimization of culture conditions affecting germination and early seedling growth

    OpenAIRE

    Stojičić Dragana; Janošević Dušica; Uzelac Branka; Čokeša V.; Budimir Snežana

    2012-01-01

    This study reports a protocol for the germination and early seedling growth of Pinus peuce Gris. using zygotic embryo culture. In order to overcome seed dormancy and optimize organogenesis, the effect of nutritional, plant growth regulatory and physical factors on in vitro germination and growth of isolated mature zygotic embryos of P. peuce were investigated.

  12. Empresarios, capitales e industrias en la región Caribe colombiana bajo el despegue del modelo agroexportador a comienzos del siglo XX

    Directory of Open Access Journals (Sweden)

    SEGIO PAOLO SOLANO

    2013-05-01

    Full Text Available Este artículo trata sobre la relación entre la capacidad de acumulación de capitales por parte de la elite empresarial de Barranquilla, la inversión en industrias y el tipo de unidad fabril que surgió en esta ciudad entre 1900 y 1934. La historiografía reciente explica la debilidad del desarrollo fabril de la región Caribe colombiana en función de la inelasticidad del mercado regional, la ausencia de productos regionales con destino a los mercados internacionales, el cambio del sistema de transporte nacional, el despegue del puerto de Buenaventura en la costa Pacífica que desplazó a los puertos sobre la costa Caribe y las políticas económicas del gobierno central. En este ensayo intentamos mostrar que esa debilidad también se explica por la naturaleza de los empresarios que las originaron y por las restricciones que tuvo la acumulación de capital en manos de éstos durante el periodo en estudio. Creemos que el monopolio que durante varios decenios tuvieron los empresarios de la región Caribe sobre las exportaciones e importaciones sirviendo en la mayor de las veces como simples intermediarios y comisionistas se desarticuló con el despegue del modelo agroexportador a comienzos del siglo XX, diseñado para que los comerciantes y productores de las zonas del interior del país se relacionaran de forma directa y sin intermediaciones con los mercados extranjeros. En consecuencia lo que mostramos es que no existió una línea de continuidad entre las actividades empresariales del siglo XIX y las de comienzos de la siguiente centuria, lo que terminó afectando las posibilidades del sostenimiento y ensanche de las industrias. Abstract This article discusses the relationship between the capacity of accumulation of capital by the business elite of Barranquilla, investment in industry and manufacturing unit of the type that emerged in this city between 1900 and 1934. Recent history explains the weakness of the industrial development of the

  13. Natural production of Tuber aestivum in central Spain: Pinus spp. versus Quercus spp. brûlés

    Directory of Open Access Journals (Sweden)

    Luis G. Garcia-Montero

    2014-08-01

    Full Text Available Aim of study: Tuber aestivum is the most widespread edible truffle, with increasing commercial interest. This species can produce carpophores with conifer hosts, in contrast with the inability of Pinus spp. to induce fruiting in other truffle species such as Tuber melanosporum. Therefore the objective is to compare the characteristics and carpophore production of T. aestivum brûlés associated with Pinus spp. versus Quercus spp.Area of study: We studied the natural habitats of T. aestivum in the Alto Tajo Nature Reserve in central Spain.Material and methods: During 5 years, we monitored the production of carpophores and brûlé size of 145 T. aestivum brûlés associated with Pinus nigra subsp. salzmanni and P. sylvestris and Quercus ilex subsp. ballota and Q. faginea hosts. Statistical treatment was performed using the Statistica Program v. 6.Main Results: The size of brûlés associated with Pinus was significantly smaller than that of brûlés associated with Quercus. However, carpophore production per brûlé, and especially for brûlés of similar size, was greater when the host plant was a pine. After accounting for brûlé size, the production of brûlés associated with Pinus spp. was 2.23 (95% CI, between 1.35 and 3.69 and 1.61 (95% CI, between 1.02 and 2.54 times greater than the production of brûlés associated with Quercus faginea and Q. ilex subsp. ballota, respectively.Research highlights: The considerable ability of Pinus nigra subsp. salzmanni and P. sylvestris to form effective brûlés and to produce carpophores of Tuber aestivum in natural conditions was clearly demonstrated, and suggest that those species can be of use in the culture of T. aestivum.Key words: Summer truffle; Tuber aestivum; truffle culture; truffle ecology; Pinus spp.; Quercus spp.

  14. 四种松属植物叶的抗寒抗旱特点研究%Study on Dry Resistance and Cold Resistance of Leaf of Pinus

    Institute of Scientific and Technical Information of China (English)

    倪福太; 李长有; 王占武; 刘强

    2012-01-01

    为了研究松属植物叶片与植物抗寒抗旱特点的关系,以松属(Pinus)两种植物樟子松(Pinus sylvestris var.mongolica Litvin.)和油松(Pinus tabulaeformis Carr.)为主要实验材料,同时,观察黑松(Pinus thunbergii Parl.)和马尾松(Pinus massoniana Lamb.),研究针叶的表皮特征及叶片不同部位的解剖结构.结果表明,松属植物叶表皮外具有发达的角质层,气孔下陷,具有大的孔下室,树脂道发达.这说明松属植物叶具有旱生和寒性植物的形态结构特征.%In order to study the relationship between leaf of Pinus and drought resistance and cold resistance,epidermis characteristic and anatomy construction of needle leaf of two specices plants(Pinus sylvestrisa var.mongolica Litvin.and Pinus tabulaeformis Carr.) in Pinus are observed.The results indicated that the leaf of Pinus plants have some construction of drought resistance and cold resistance.For example:the outside on the surface of leaf is covered with a cuticle and epicuticular waxes,its stomata are stand out of the epidermis with big bore bottom room and so on.

  15. Impact of Pinus Afforestation on Soil Chemical Attributes and Organic Matter in South Brazilian highlands

    Science.gov (United States)

    Pinheiro Dick, D.; Benvenuti Leite, S.; Dalmolin, R.; Almeida, H.; Knicker, H.; Martinazzo, R.

    2009-04-01

    The region known as Campos de Cima da Serra, located at 800 to 1400 m above sea level in the northeas of Rio Grande do Sul State, Brazil, is covered by a mosaic of natural grassland and Araucaria forest. Cattle raising, introduced by the first European settlers about 200 years ago, is the traditional economic activity in the region, occurring extensively and continuously on the natural pasture. In the last 30 years, while seeking for higher profits, local farmers have introduced agricultural crops and Pinus Taeda plantations in the original pasture lands. Pinus plantations are established in this area as dense monocultures and not as a sylvipastoral system, representing, thus, a severe threaten to the Campos' biodiversity. The soils are shallow, though very acidic (pH 4.2) and rich in exchangeable Al (28 to 47% of Al saturation), and present high contents of SOM in the surface layer (in general, higher than 4 %), which shows a low decomposition degree, as indicated by its high proportion of C-O alkyl groups (51 to 59 %). Considering that the biome sustainability of this region is being progressively affected by the change of land use and that systematic studies about exotic trees afforestation in that region are very scarce, our main objective was to investigate the impact of the introduction of Pinus on the SOM composition and chemical attributes of highland soils in 8 (Pi8) and 30 (Pi30) years old plantations, using as reference the original condition under native pasture (NP). In each studied Leptosol, soil samples were collected from three layers down to 15 cm ( 0-5 cm, 5-10 cm and 10-15 cm). Contents of exchangeable cations and of micronutrients and soil pH were determined. The SOM composition was investigated by means of elemental analyses, FTIR and fluorescence spectroscopy (three replicates). Prior to the spectroscopic analyses, samples were demineralized with 10% HF solution and organic matter loss was monitored. From the FTIR spectra, an aromaticity index

  16. Participación de las mujeres en la construcción social del territorio y el proceso de regionalización del Caribe colombiano

    Directory of Open Access Journals (Sweden)

    Yusmidia Solano

    2007-01-01

    Full Text Available Este trabajo describe el papel de las mujeres en los procesos de construcción de territorios y de regionalización en la costa Caribe colombiana. En primer lugar, se presenta la participación de las mujeres en los procesos adaptativos de los primeros habitantes, a través de su contribución a la creación de las culturas más importantes que surgieron en la región, tales como la Tairona y la Sinú. También, se consideran las acciones de resistencia de las mujeres indígenas que se opusieron a la invasión española, la participación de las mujeres en las luchas libertarias de africanos, indígenas, mestizos, zambos y criollos contra el colonialismo, y en la consolidación de la República, junto a su contribución en la construcción de los tejidos sociales que consolidaron la vida social de los pueblos y ciudades nacientes, lo que convirtió a las mujeres en integradoras de los grupos familiares, en la fuerza socializadora de las nuevas generaciones y en las garantes del funcionamiento de la estructura familiar. La segunda argumentación que se trabaja en el artículo es la referida a la participación de las mujeres en el proceso de regionalización del Caribe colombiano, en la que se establece y concluye que a pesar de que ésta se ha dado, no se ha garantizado el reconocimiento de sus intereses prácticos y estratégicos que permitan cambios en su posición social, económica y política, porque si bien hubo expresión de esos intereses en algunos de los foros realizados para concertar la visión y demandas de la región, el movimiento social no ha tenido acceso a la toma de decisiones, lo que no ha impedido si embargo, que en las últimas décadas éste se haya fortalecido.

  17. La práctica de la medicina tradicional en América Latina y el Caribe: el dilema entre regulación y tolerancia

    Directory of Open Access Journals (Sweden)

    Nigenda Gustavo

    2001-01-01

    Full Text Available OBJETIVO: Caracterizar el estado actual de la regulación de la medicina tradicional en nueve países de América Latina y el Caribe. MATERIAL Y MÉTODOS: Se construyó una base de datos sobre componentes de los sistemas de salud tradicionales en nueve países de América Latina y el Caribe, mediante la creación de una red de individuos e instituciones de distintos países que estuvieran interesados en participar como informantes especializados con diferentes perfiles. La información para este estudio de tipo cualitativo se levantó, sistematizó y analizó entre marzo y diciembre de 1998. RESULTADOS: Se exponen los resultados obtenidos del tema de regulación de la medicina tradicional dividiendo a los países en tres grupos: a los que cuentan con algún tipo de desarrollo en materia de legislación; b los que están trabajando en el proceso de legislación, y c los que no tienen legislación y el proceso de regulación es incipiente. CONCLUSIONES: Se muestra que el proceso legislativo de la medicina tradicional es variado en la región y se encuentra en diferentes etapas. Esta variedad de estadios nos muestra la complejidad de regular una práctica terapéutica de prestadores con bajos niveles de entrenamiento formal, con prácticas variadas y que sustentan su ejercicio en usos y costumbres que en las mayoría de las ocasiones son difíciles de ubicar dentro de los estándares de los sistemas de salud oficiales. El estudio se considera importante para el diseño e implementación de políticas que permitan adecuar la oferta de servicios de medicina tradicional con las necesidades de las poblaciones que más hacen uso de ella. El texto completo en inglés de este artículo está disponible en: http://www.insp.mx/salud/index.html

  18. Pollinator Competition as a Driver of Floral Divergence: An Experimental Test

    OpenAIRE

    Temeles, Ethan J.; Newman, Julia T.; Newman, Jennifer H.; Cho, Se Yeon; Mazzotta, Alexandra R.; Kress, W. John

    2016-01-01

    Optimal foraging models of floral divergence predict that competition between two different types of pollinators will result in partitioning, increased assortative mating, and divergence of two floral phenotypes. We tested these predictions in a tropical plant-pollinator system using sexes of purple-throated carib hummingbirds (Anthracothorax jugularis) as the pollinators, red and yellow inflorescence morphs of Heliconia caribaea as the plants, and fluorescent dyes as pollen analogs in an enc...

  19. Preservative treatment of wood (Pinus oocarpa) for use as poles on electrification net; Tratamento preservativo de madeira (Pinus oocarpa) para uso como postes de linhas de eletrificacao

    Energy Technology Data Exchange (ETDEWEB)

    Zeca Filho, Antonio [UNESP, Botucatu, SP (Brazil). Faculdade de Ciencias Agronomicas; Targa, Luiz A. [UNESP, Botucatu, SP (Brazil). Faculdade de Ciencias Agronomicas. Dept. de Engenharia Rural

    1998-12-01

    Four poles, class M, nominal length of 10,0 m, of Pinus oocarpa, treated with hydro soluble immunization, to the copper base, chromium and boron were tested. The poles were treated in the Processing /Wood Laboratory of the UNESP Mechanical Engineering Department, Campus of Bauru. The chemical analysis of the hydro soluble immunization retention and penetration determination was realized at the state of Sao Paulo Technological Research Institute. The used methodology for the poles treatment, supported by modified Boucherie process, consist in to move the the preservation product in aqueous solution, along the shaft of the poles, from one extremity to the another, using hydrostatic pressure to facilitate the operation. The solution shift the sap, and in the end of operation, the tissues before soaked of sap. become soaked by the preservation product. This treatment process requests equipment of easy maintenance and moderate price. I can be manufactured easily by the own farmer and, without difficulty, it can be transferred from a position to another, according to the needs of wood treated, and also the available raw material. With that procedure described it was possible to obtain a satisfactory retention of the immunization product along it shaft of the poles, satisfying the minimum values recommended by the Brazilian Association of Technical Norms (1984a.). (author)

  20. Respuesta a la sequía de Pinus radiata D. Don y su implicación en los procesos de tolerancia

    OpenAIRE

    De Diego Sánchez, Nuria

    2013-01-01

    160 p. (Bibliogr. 141-160) Correo electrónico de la autora: [ES] En este estudio se evaluaron cinco ecotipos de Pinus radiata D. Don y un híbrido de especie (O4, Pinus radiata x Pinus attenuata) con el fin de caracterizar fisiológicamente su respuesta al estrés hídrico y determinar su tolerancia, capacidad de recuperación y endurecimiento. La plantas de O4 fueron incluidas como modelo de tolerancia debido a la alta resistencia a la sequía descrita en P. attenuata (Begle...

  1. Phytosociology, structure and dynamics of Pinus roxburghii associations from Northern Pakistan

    Institute of Scientific and Technical Information of China (English)

    Nasrullah Khan; Kishwar Ali; Shahid Shaukat

    2014-01-01

    We investigated the phytosociology, structure and dynamics of Pinus roxburghii in 40 stands in northern areas of Pakistan by using cluster analysis (Ward’s agglomerative clustering) and ordination (Non-metric Multidimensional Scaling). Cluster analysis revealed three major groups associated with specific environmental characteristics: (1) P. roxburghii (2) Pinus-Quercus baloot and (3) Pinus-Olea ferruginea community types. NMS-ordination showed the major gradient as an amalgam of elevation (r2=0.441, p<0.01) and slope (r2=0.391, p<0.05) as the two topographic factors correlated with species distribution. The first ordination axis also showed positive correlation with soil variables like pH and electrical conductivity, suggesting that soil chemistry was related to topographic characteristics and probably acted as a secondary gradient. We also examined size class distributions, age structures and growth rates of the three communities in order to describe community development and dynamics. Total tree density was 14700 plants/ha, with P. roxburghii having a relative density of 82%to 100%. Density of juve-nile and total density and basal area of the subordinate tree species were low. The low density of trees in the smallest diameter size-class sug-gested that the recruitment of small P. roxburghii plants into the adult population may be lower than the required replacement rate for the stands. Pooled size-class distributions for the species showed a multimo-dal pattern with some regeneration gaps. Browsing, heavy logging and other anthropogenic activities were the overriding factors responsible for the poor recruitment of P. roxburghii. We concluded from the age struc-ture that the forests were characterized by the dominance of young trees. Growth rate analysis revealed that P. roxburghii was the fastest growing species among the conifers species in Pakistan. In view of its relatively fast growth and longevity, P. roxburghii seems to be a suitable choice for short

  2. Analysis of mating system in two Pinus cembra L. populations of the Ukrainian Carpathians

    Directory of Open Access Journals (Sweden)

    Dmitri V. Politov

    2013-12-01

    Full Text Available Volume 51 (1, 2008, pages 11-18Back Analysis of mating system in two Pinus cembra L. populations of the Ukrainian Carpathians     D.V. PolitovLaboratory of Population Genetics, Vavilov Institute of General Genetics, Russian Academy of Sciences Y.V. PirkoInstitute of Cell Biology and Genetic Engineering, Ukraine N.N. PirkoInstitute of Cell Biology and Genetic Engineering, Ukraine E.A. MudrikDonetsk Botanical Gardens, Ukraine I.I. KorshikovDonetsk Botanical Gardens, Ukraine  contact authors by Editorial Office  SUMMARY  In natural pine populations, a mixed mating system is typical, characterized by the proportions of selfed and outcrossed seeds. Swiss stone pine (Pinus cembra L. is one of the least studied European conifers in this respect. The mating system of six polymorphic allozyme loci were studied in haploid megagametophytes and diploid open-pollinated embryos in two stands located in the East Carpathians. In the 'Gorgany' population (24 trees, 198 seeds the mean singlelocus estimated outcrossing rate (ts was 0.731, and the multilocus estimate (tm was 0.773. In the 'Yayko' population the outcrossing rate was lower (27 trees, 213 seeds, ts=0.645, tm=0.700, suggesting 23-30% of seeds are self-pollinated. Correlation of outcrossing rate estimates among loci was less than 1, (0.300 in 'Gorgany' and 0.469 in 'Yayko' indicating biparental inbreeding occurred. Differences between tm and ts (0.042 in 'Gorgany' and 0.056 in 'Yayko' can also be influenced by consanguineous mating, indicated by the presence of spatial and genetic family structure. In small isolated populations of Pinus cembra, which are typical for the Carpathian part of the species' range, inbreeding depression may negatively affect seed quality. The high proportion of selfed seeds observed here can be expected in any seedlot of this species and should be taken into account while planning gene conservation or reforestation measures. Maternal trees in these populations

  3. Metal(loid) allocation and nutrient retranslocation in Pinus halepensis trees growing on semiarid mine tailings

    Energy Technology Data Exchange (ETDEWEB)

    Parraga-Aguado, Isabel, E-mail: isabel.parraga@upct.es [Universidad Politecnica de Cartagena, Departamento de Ciencia y Tecnología Agraria Paseo Alfonso XIII, Cartagena 48. 30203 (Spain); Querejeta, Jose-Ignacio [Water and Soil Conservation Department, Centro de Edafología y Biología Aplicada del Segura CEBAS-CSIC Campus Universitario de Espinardo, PO Box 164, Espinardo-Murcia ES-30100 (Spain); González-Alcaraz, María Nazaret; Conesa, Hector M. [Universidad Politecnica de Cartagena, Departamento de Ciencia y Tecnología Agraria Paseo Alfonso XIII, Cartagena 48. 30203 (Spain)

    2014-07-01

    The goal of this study was to evaluate internal metal(loid) cycling and the risk of metal(loid) accumulation in litter from Pinus halepensis trees growing at a mine tailing disposal site in semiarid Southeast Spain. Internal nutrient retranslocation was also evaluated in order to gain insight into the ability of pine trees to cope with the low-fertility soil conditions at the tailings. We measured metal(loid) concentrations in the foliage (young and old needles), woody stems and fresh leaf litter of pine trees growing on tailings. The nutrient status and stable isotope composition of pine foliage (δ{sup 13}C, δ{sup 15}N, δ{sup 18}O as indicators of photosynthesis and water use efficiency) were also analyzed. Tailing soil properties in vegetation patches and in adjacent bare soil patches were characterized as well. Significant amounts of metal(loid)s such us Cd, Cu, Pb and Sb were immobilized in the woody stems of Pinus halepensis trees growing on tailings. Leaf litterfall showed high concentrations of As, Cd, Sb, Pb and Zn, which thereby return to the soil. However, water extractable metal(loid) concentrations in tailing soils were similar between vegetation patches (mineral soil under the litter layer) and bare soil patches. The pines growing on mine tailings showed very low foliar P concentrations in all leaf age classes, which suggests severe P deficiency. Young (current year) needles showed lower accumulation of metal(loid)s, higher nutrient concentrations (P and K), and higher water use efficiency (as indicated by and δ{sup 13}C and δ{sup 18}O data) than older needles. Substantial nutrient resorption occurred before leaf litterfall, with 46% retranslocation efficiency for P and 89% for K. In conclusion, phytostabilization of semiarid mine tailings with Pinus halepensis is feasible but would require careful monitoring of the trace elements released from litterfall, in order to assess the long term risk of metal(loid) transfer to the food chain

  4. Metal(loid) allocation and nutrient retranslocation in Pinus halepensis trees growing on semiarid mine tailings

    International Nuclear Information System (INIS)

    The goal of this study was to evaluate internal metal(loid) cycling and the risk of metal(loid) accumulation in litter from Pinus halepensis trees growing at a mine tailing disposal site in semiarid Southeast Spain. Internal nutrient retranslocation was also evaluated in order to gain insight into the ability of pine trees to cope with the low-fertility soil conditions at the tailings. We measured metal(loid) concentrations in the foliage (young and old needles), woody stems and fresh leaf litter of pine trees growing on tailings. The nutrient status and stable isotope composition of pine foliage (δ13C, δ15N, δ18O as indicators of photosynthesis and water use efficiency) were also analyzed. Tailing soil properties in vegetation patches and in adjacent bare soil patches were characterized as well. Significant amounts of metal(loid)s such us Cd, Cu, Pb and Sb were immobilized in the woody stems of Pinus halepensis trees growing on tailings. Leaf litterfall showed high concentrations of As, Cd, Sb, Pb and Zn, which thereby return to the soil. However, water extractable metal(loid) concentrations in tailing soils were similar between vegetation patches (mineral soil under the litter layer) and bare soil patches. The pines growing on mine tailings showed very low foliar P concentrations in all leaf age classes, which suggests severe P deficiency. Young (current year) needles showed lower accumulation of metal(loid)s, higher nutrient concentrations (P and K), and higher water use efficiency (as indicated by and δ13C and δ18O data) than older needles. Substantial nutrient resorption occurred before leaf litterfall, with 46% retranslocation efficiency for P and 89% for K. In conclusion, phytostabilization of semiarid mine tailings with Pinus halepensis is feasible but would require careful monitoring of the trace elements released from litterfall, in order to assess the long term risk of metal(loid) transfer to the food chain. - Highlights: • Significant amounts of

  5. EFFECTS OF BELT SPEED, PRESSURE AND GRIT SIZE ON THE SANDING OF Pinus elliottii WOOD

    Directory of Open Access Journals (Sweden)

    Manoel Cléber de Sampaio Alves

    2015-03-01

    Full Text Available The present paper aims to evaluate the influence of the factors (belt speed, pressure and grit size on the output parameters (temperature and surface roughness for Pinus elliottii wood sanding, processed parallel to the fibers. Three levels of belt speed, three levels of pressure and four levels of grit size were employed, with six replicates for each process, totaling 216 observations. The experiment conducted under a randomized complete block design (RCBD. The results were analyzed employing the analysis of variance (ANOVA with 5% of significance level. Only grit sizes were significant to different temperature levels. The same outcome was observed for roughness, where only grits sizes were significant. No interaction between the pressure and belt speed factors were observed for all the results analyzed.

  6. MODELLING GROWTH AND YIELD OF Pinus taeda L. USING DIFUSION PROCESS

    Directory of Open Access Journals (Sweden)

    Rozane de Loyola Eisfeld

    2005-06-01

    Full Text Available This work tested a methodology for growth and yield modeling. The diffusion process is not yet widely used incommercial plantations in Brazil, but it can provide predictions comparable to others methodologies, producing satisfactory resultsto simulate growth and yield. For this purpose, 325 permanent samples established in unthinned Pinus taeda L. (loblolly pine standsowned by the International Paper of Brazil Co were used. The diffusion process methodology consists in connecting growthincrement and mortality models in Kolmogorov equation . Seventy sample plots were randomly chosen in order to make thecomparison among the observed and predicted values. In general, the diffusion process provided satisfactory estimates of number oftrees, basal area per hectare and stem volume.

  7. NATURAL WEATHERING OF SCOTS PINE (Pinus sylvestris L. BOARDS MODIFIED WITH FUNCTIONALISED COMMERCIAL SILICONE EMULSIONS

    Directory of Open Access Journals (Sweden)

    Shyamal C. Ghosh

    2009-05-01

    Full Text Available A quat-silicone micro-emulsion (particle size <40 nm, an amino-silicone macro-emulsion (110 nm, and an alkyl modified silicone macro-emulsion (740 nm were used to modify Scots pine (Pinus sylvestris L. sapwood. Treated and uncoated boards were exposed to natural weathering for one year along with water treated controls according to EN 927-3. The treatment with silicone emulsions did not enhance the color stability, which was assessed at three months intervals using a spectrophoto-meter and classified according to the CIE-Lab system. Treatment with amino-silicone emulsions gave a more yellowish appearance of the wood surface before weathering than the other silicones and the control. Boards treated with quat- and amino-silicone were less overgrown by staining fungi and displayed reduced surface roughness than those treated with alkyl-modified silicone and the control samples.

  8. Monitoring of Pinus massoniana spatial pattern changes based on RS and GIS techniques

    Institute of Scientific and Technical Information of China (English)

    WANG Lei; HUANG Hua-guo; ZHANG Xiao-li; LUO You-qing; SHI Juan

    2008-01-01

    Our research focused on Pinus massoniana information extracted from remote sensing images based on the knowledge detection and decision tree algorithm and established a spatial pattern model, combining quantitative theoretical ecology with remote sensing (RS) and geometric information system (GIS) techniques. Applying information extraction methods and a spatial pattern model, we studied P. massoniana spatial patterns changes before and after the invasion by pine wood nematode (Bursaphelenchus xylophilus) in Fuyang and Zhoushan counties, Zhejiang Province, east China. The P. massoniana spatial patterns are clustering,whether the invasion happened or not. But the degree of clustering is different. Our results show good agreement with field data.Applying the results, we analyzed the relationship between spatial patterns and the invasion level. Then we drew the elementary conclusion that there are two kinds of patterns for pine wood nematode to spread: continuous and discontinuous diffusion. This approach can help monitor and evaluate the changes in ecological systems.

  9. Diversity of ectomycorrhizal symbionts in a disturbed Pinus halepensis plantation in the Mediterranean region

    OpenAIRE

    El karkouri, Khalid; Martin, Francis; Mousain, Daniel

    2004-01-01

    Diversité ectomycorhizienne dans une plantation à Pinus halepensis. La diversité génétique des ectomycorhizes de plants de P. halepensis a été examinée une année et demie après introduction dans un site incendié de Rieucoulon (Hérault, France). Cette diversité a été caractérisée à l’aide du polymorphisme de fragments de restriction (RFLP) et du séquençage de l’espaceur interne transcrit (ITS) de l’ADN ribosomal nucléaire. Trois traitements ont été examinés : des plants témoins, des plants myc...

  10. Environmental pollution changes in membrane lipids, antioxidants and vitality of Scots pine (Pinus sylvestris L. pollen

    Directory of Open Access Journals (Sweden)

    Paweł M. Pukacki

    2011-07-01

    Full Text Available Investigations were carried out on pollen grains of Scots pine (Pinus sylvestris L. collected from trees at 1.5, 3, 4 km and control, 20 km from the Luboń factory producing mineral fertilisers. The percentage of germination of pollen formed close to the pollution source was ca 20% lower compared to the control pollen. Lowered vitality of the pollen was effected in changes of the structure of cytoplasmic membranes. Pollen from the polluted area contained ca 15% less total phospholipids, mainly phosphatidylcholine and phosphatytidylinositol and had a lower content of soluble proteins and less of low molecular antioxidants, such as thiols and ascorbic acid. Composition of total fatty acid in phospholipids fractions showed a significant reduction in the degree of unsaturation of fatty acids. Pollen originating from the polluted area and stored at -30°C showed considerably stronger degradation of cytoplasmic membranes than control.

  11. Effects of three irradiation methods on pollen germination and pollen tube growth of Pinus thunbegii

    International Nuclear Information System (INIS)

    The effect of 30 keV nitrogen ion beams, UV and γ-rays irradiation on pollen germination and pollen tube growth of Pinus thunbergii were investigated. Results showed that the biological effects induced by ion beam implantation were different from those induced by UV and γ-rays irradiation. The dose response curve of ion implantation treatment presented a particular 'saddle-likepattern, and ion implantation also significantly induced pollen tube tip swelling. These results indicated that low energy ion implantation might work in different way compared to UV and γ-rays irradiation. It was suggested that pollen could be served as an excellent model system to study the underlying mechanisms responsible for biological effects of ion beam irradiation at cellular level. (authors)

  12. Application of hydrothermal treatment to affect the fermentability of Pinus radiata pulp mill effluent sludge.

    Science.gov (United States)

    Andrews, John; Smit, Anne-Marie; Wijeyekoon, Suren; McDonald, Ben; Baroutian, Saeid; Gapes, Daniel

    2014-10-01

    A hybrid technique incorporating a wet oxidation stage and secondary fermentation step was used to process Pinus radiata pulp mill effluent sludge. The effect of hydrothermal oxidation at high temperature and pressure on the hydrolysis of constituents of the waste stream was studied. Biochemical acidogenic potential assays were conducted to assess acid production resulting from anaerobic hydrolysis of the wet oxidised hydrolysate under acidogenic conditions. Significant degradation of the lignin, hemicellulose, suspended solids, carbohydrates and extractives were observed with wet oxidation. In contrast, cellulose showed resistance to degradation under the experimental conditions. Extensive degradation of biologically inhibitory compounds by wet oxidation did not show a beneficial impact on the acidogenic or methanogenic potential compared to untreated samples. PMID:25125197

  13. The effects of understory vegetation on P availability in Pinus radiata forest stands:A review

    Institute of Scientific and Technical Information of China (English)

    A. Arivin Rivaie

    2014-01-01

    In many second-rotation Pinus radiata forest planta-tions, there has been a steady trend towards wider tree spacing and an increased rate of application of P fertiliser. Under these regimes, the potential for understory growth is expected to in-crease through increased light and greater nutrient resources. Therefore, understory vegetation could become a more signifi-cant component of P cycling in P. radiata forests than under closely-spaced stands. Studies have shown that growth rates and survival of trees is reduced in the presence of understory vegeta-tion due to the competition of understory vegetation with trees. Other studies have suggested that understory vegetation might have beneficial effects on nutrient cycling and conservation within forest stands. This review discusses the significance of understory vegetation in radiata pine forest stands, especially their role in enhancing or reducing P availability to forest trees.

  14. [Genetic structure of the populations of Pallas pine (Pinus pallasiana D. Don) reforested in extreme conditions].

    Science.gov (United States)

    Korshikov, I I; Krasnoshtan, O V

    2010-01-01

    The paper reports on an intensive reforestation of Pallas pine (Pinus pallasiana D. Don) in post-fire sites in the native Mountainous Crimean populations and around the previously planted seed-producing trees in ore-mining dumps of the Krivoy Rog region. Self-sown progeny growing in the dump is characterized by a better growth and comes to the reproductive development phase earlier compared to that one growing in post-fire forest. Allele variability at 20 allozyme loci is less in self-sown progeny than in the native populations whereas its heterozygosity level is similar. Genetic distance (D(N)) among self-sown progenies in post-fire sites and ore-mining dump is comparable to that of the natural populations. PMID:20608157

  15. Single nucleotide polymorphism discovery of Pinus radiata with chromosome walking PCR method

    Institute of Scientific and Technical Information of China (English)

    Wei LI; Hui LI; Xiaoyang CHEN; Harry WU

    2008-01-01

    In this paper, the basic principle of chromosome walking is presented and we used an actin gene of radiata pine (Pinus radiata) as an example to conduct upstream and downstream chromosome walking for EST sequences. The full genomic sequence (2154 bp) of the actin gene, including promoters 5' UTR, CDS and 3' UTR, was identified by chromosome walking. PCR amplification and DNA band sequencing from 200 unrelated radiata pine trees revealed a total of 21 SNPs for the actin gene, three in the promoter region, 15 in CDS and 4 in 3' UTR. The results of this experiment provide a technical framework for SNPs dis-covery in none coding regions of candidate genes.

  16. Genetic Differentiation of Pinus koraiensis under Different Altitude Conditions in Changbai Mountain

    Institute of Scientific and Technical Information of China (English)

    FENGFujuan

    2004-01-01

    The genetic differentiation of Korean pine (Pinus koraiensis) in different altitudes in Changbai Mountain was analyzed by ISSR technique, and it was found that the level of genetic diversity of Korean pine reduces along with altitude increasing in Changbai Mountain. The variation of Korean pine is mainly from intra-population and there is a positive relativity between genetic distance and vertical geographic distance of Korean pine in different altitudes. The genetic coherence shows that altitude has less insulation to Korean pine. Therefore, it is deduced that the terrain formation of vertical distribution of Korean pine is a result of diffusion from lower altitude to higher altitude in the course of enlarging its adaptability.

  17. Nitrogen transport in the ectomycorrhiza association: the Hebeloma cylindrosporum-Pinus pinaster model.

    Science.gov (United States)

    Müller, Tobias; Avolio, Meghan; Olivi, Martin; Benjdia, Mariam; Rikirsch, Enno; Kasaras, Alexis; Fitz, Michael; Chalot, Michel; Wipf, Daniel

    2007-01-01

    The function of the ectomycorrhizal mutualism depends on the ability of the fungal symbionts to take up nutrients (particularly nitrogen) available in inorganic and/or organic form in the soil and to translocate them (or their metabolites) to the symbiotic roots. A better understanding of the molecular mechanisms underlying nutrient exchanges between fungus and plant at the symbiotic interface is necessary to fully understand the function of the mycorrhizal symbioses. The present review reports the characterization of several genes putatively involved in nitrogen uptake and transfer in the Hebeloma cylindrosporum-Pinus pinaster ectomycorrhizal association. Study of this model system will further clarify the symbiotic nutrient exchange which plays a major role in plant nutrition as well as in resistance of plants against pathogens, heavy metals, drought stress, etc. Ultimately, ecological balance is maintained and/or improved with the help of symbiotic associations, and therefore, warrant further understanding. PMID:17083951

  18. AVALIAÇÃO DE PROTETORES FÍSICOS EM SEMEADURA DIRETA DE Pinus taeda L

    Directory of Open Access Journals (Sweden)

    Vilmar Luciano Mattei

    1997-12-01

    Full Text Available O trabalho avalia a eficiência de protetores físicos de pontos, na implantação de Pinus taeda L. por semeadura direta. Como proteção foram utilizados o copo plástico, sem fundo, o laminado de madeira e maravalha. Ambos colocados sobre pontos semeados com três sementes cada. A análise de emergência, sobrevivência e número de pontos com pelo menos uma planta, um ano após a semeadura, demonstrou que a utilização de um protetor físico, é indispensável para evitar elevadas perdas de sementes, causadas por pássaros e pela movimentação do solo.

  19. Ectomycorrhizae of Tuber huidongense and T. liyuanum with Castanea mollissima and Pinus armandii.

    Science.gov (United States)

    Wan, Shan-Ping; Yu, Fu-Qiang; Tang, Li; Wang, Ran; Wang, Yun; Liu, Pei-Gui; Wang, Xiang-Hua; Zheng, Yi

    2016-04-01

    Tuber huidongense and T. liyuanum are common commercial white truffles in China that belong to the Rufum and Puberulum groups of the genus Tuber, respectively. Their mycorrhizae were successfully synthesized with two native trees--Castanea mollissima and Pinus armandii--under greenhouse conditions. The identities of the mycorrhizae were confirmed through internal transcribed spacer (ITS) sequence analyses, and their morphological characteristics were described. All of the obtained mycorrhizae have an interlocking pseudoparenchymatous mantle, which is a typical feature of truffle mycorrhizae. The mycorrhizae of T. huidongense on the two trees have hyaline branched emanating hyphae, similar to the documented mycorrhizae of the Rufum group. The unramified, spiky, and hyaline cystidia on the mycorrhizae of T. liyuanum with both C. mollissima and P. armandii further confirmed that this characteristic is constant for the mycorrhizae of the Puberulum group. The successful mycorrhizal syntheses on the two nut-producing trees will be of economic importance in the cultivation of the two truffles. PMID:26452572

  20. Evaluation of the transpiration of Pinus pinea L under field conditions

    International Nuclear Information System (INIS)

    The transpiration of Pinus pinea L. was measured in the field using the tritiated water method. The stand is located on the french mediterranean coast. It has a density of 800 trees per hectare. The mean DBH is 20.2 cm per tree and their age approximately 35 years. The consumption of water by the forest stand was 974 mm between April and October 1978. As the rainfall input, during this same time, amounted only 265 mm, water supply came from the water table by root absorption and from the soil moisture by capillary rise. Low transpiration rates were attained in April (3.1 mm. day) and October (3.9 mm. day), while higher rates were attained in May (5.2 mm. day) and June (6.0 mm. day). Recorded seasonal values agreed with estimates obtained by studying the fluctuations of the ground water table and by using BOUCHET's 'Piche corrected' equation