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Sample records for tulkojusi liana blumberga

  1. The past, present, and potential future of liana ecology

    NARCIS (Netherlands)

    Schnitzer, S.A.; Putz, F.E.; Bongers, F.J.J.M.; Kroening, K.

    2014-01-01

    Lianas are a conspicuous component of many forests, particularly in the tropics. Lianas also compete intensely with trees for belowground resources – primarily water and nutrients. Liana publication rate was extremely low until the 1980s, after which it began a rapid rise. The increase in liana

  2. Lianas reduce carbon accumulation and storage in tropical forests.

    Science.gov (United States)

    van der Heijden, Geertje M F; Powers, Jennifer S; Schnitzer, Stefan A

    2015-10-27

    Tropical forests store vast quantities of carbon, account for one-third of the carbon fixed by photosynthesis, and are a major sink in the global carbon cycle. Recent evidence suggests that competition between lianas (woody vines) and trees may reduce forest-wide carbon uptake; however, estimates of the impact of lianas on carbon dynamics of tropical forests are crucially lacking. Here we used a large-scale liana removal experiment and found that, at 3 y after liana removal, lianas reduced net above-ground carbon uptake (growth and recruitment minus mortality) by ∼76% per year, mostly by reducing tree growth. The loss of carbon uptake due to liana-induced mortality was four times greater in the control plots in which lianas were present, but high variation among plots prevented a significant difference among the treatments. Lianas altered how aboveground carbon was stored. In forests where lianas were present, the partitioning of forest aboveground net primary production was dominated by leaves (53.2%, compared with 39.2% in liana-free forests) at the expense of woody stems (from 28.9%, compared with 43.9%), resulting in a more rapid return of fixed carbon to the atmosphere. After 3 y of experimental liana removal, our results clearly demonstrate large differences in carbon cycling between forests with and without lianas. Combined with the recently reported increases in liana abundance, these results indicate that lianas are an important and increasing agent of change in the carbon dynamics of tropical forests.

  3. Liana Distribution And Abundance In Moist Tropical Forest In Ghana ...

    African Journals Online (AJOL)

    We censused lianas in plots that were subjected to three different types of silvicultural intervention in Bobiri forest in Ghana in order to answer two questions: 1) does liana cutting during the initial years of a cutting cycle influence liana densities, basal area and vine loads in tree crowns relative to unlogged forest?; 2) does ...

  4. How liana loads alter tree allometry in tropical forests

    NARCIS (Netherlands)

    Souza Dias, de Arildo; Santos, Dos Karin; Santos, Dos Flavio Antonio Maës; Martins, Fernando R.

    2017-01-01

    Intense competition with lianas (wood climbers) can limit tree growth, reproduction, and survival. However, the negative effects of liana loads on tree allometry have not yet been addressed. We investigated the hypothesis that liana loading on tree crown alters tree’s allometry, expressed through

  5. Lianas and trees in tropical forests in south China

    NARCIS (Netherlands)

    Cai, Z.Q.

    2007-01-01

    Lianas (woody climbers) and trees are the most important life-forms in most tropical forests. In many of these forests lianas are abundant and diverse and their presence is often a key physiognomic feature. Lianas contribute substantially to the floristic, structural and functional diversity of

  6. Are temperate mature forests buffered from invasive lianas?

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    Pavlovic, Noel B.; Leicht-Young, Stacey A.

    2011-01-01

    Mature and old-growth forests are often thought to be buffered against invasive species due to low levels of light and infrequent disturbance. Lianas (woody vines) and other climbing plants are also known to exhibit lower densities in older forests. As part of a larger survey of the lianas of the southern Lake Michigan region in mature and old-growth forests, the level of infestation by invasive lianas was evaluated. The only invasive liana detected in these surveys was Celastrus orbiculatus Thunb. (Celastraceae). Although this species had only attached to trees and reached the canopy in a few instances, it was present in 30% of transects surveyed, mostly as a component of the ground layer. Transects with C. orbiculatus had higher levels of soil potassium and higher liana richness than transects without. In contrast, transects with the native C. scandens had higher pH, sand content, and soil magnesium and lower organic matter compared to transects where it was absent. Celastrus orbiculatus appears to be a generalist liana since it often occurs with native lianas. Celastrus orbiculatus poses a substantial threat to mature forests as it will persist in the understory until a canopy gap or other disturbance provides the light and supports necessary for it to ascend to the canopy and damage tree species. As a result, these forests should be monitored by land managers so that C. orbiculatus eradication can occur while invasions are at low densities and restricted to the ground layer.

  7. Diversity and field status of lianas in Tripura, India

    Directory of Open Access Journals (Sweden)

    Lalawmkima Darlong

    2014-12-01

    Full Text Available A checklist of lianas in Tripura, India was prepared which enumerates about 60 species of lianas in the state. In this present paper, diversity of lianas in Tripura was analyzed by field exploration from October 2010 to February 2013.  Out of the total 60 species enumerated, 34 species are provided with their phenology and places of occurrence . Field photographs are also given to facilitate their easy identification. Other 26 species could not be traced in the field and are represented only by herbarium specimens.  

  8. Exploration of High elevation liana colonies on Mt. Slamet, Central Java, Indonesia

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    WS Hoover

    2009-12-01

    Full Text Available One hundred forty–five individual lianas were distributed on 2 East facing ridges on the second highest mountain on Java, Mt. Slamet (3418 m., Central Java, Indonesia. Twenty one colonies were observed on small flat areas on ridges. The liana species observed include: Embelia pergamacea, Toddalia asiatica, Elaeagnus latifolia, Schefflera lucida, Vaccinium laurifolium and Lonicera javanica. Diameter of each liana was measured and liana density/flat area calculated. Floristic collecting was under- taken within the elevational gradient of liana distribution. Data suggest an ecotone transition from lower to upper mon- tane forest is observed between 2200 and 2300 m, though forest types are difficult to determine due to disturbance caused by fire at the upper elevations. Observing lianas at these unusuall high elevations with near pluvial rainfall, con- tradict established scientific theory concerning global distribution and abundance of lianas.  

  9. Long-term changes in liana abundance and forest dynamics in undisturbed Amazonian forests.

    Science.gov (United States)

    Laurance, William F; Andrade, Ana S; Magrach, Ainhoa; Camargo, José L C; Valsko, Jefferson J; Campbell, Mason; Fearnside, Philip M; Edwards, Will; Lovejoy, Thomas E; Laurance, Susan G

    2014-06-01

    Lianas (climbing woody vines) are important structural parasites of tropical trees and may be increasing in abundance in response to global-change drivers. We assessed long-term (-14-year) changes in liana abundance and forest dynamics within 36 1-ha permanent plots spanning -600 km2 of undisturbed rainforest in central Amazonia. Within each plot, we counted each liana stem (> or = 2 cm diameter) and measured its diameter at 1.3 m height, and then used these data to estimate liana aboveground biomass. An initial liana survey was completed in 1997-1999 and then repeated in 2012, using identical methods. Liana abundance in the plots increased by an average of 1.00% +/- 0.88% per year, leading to a highly significant (t = 6.58, df = 35, P rainfall and forest dynamics from our study site to test hypotheses about potential drivers of change in liana communities. Lianas generally increase with rainfall seasonality, but we found no significant trends over time (1997-2012) in five rainfall parameters (total annual rainfall, dry-season rainfall, wet-season rainfall, number of very dry months, CV of monthly rainfall). However, rates of tree mortality and recruitment have increased significantly over time in our plots, and general linear mixed-effect models suggested that lianas were more abundant at sites with higher tree mortality and flatter topography. Rising concentrations of atmospheric CO2, which may stimulate liana growth, might also have promoted liana increases. Our findings clearly support the view that lianas are increasing in abundance in old-growth tropical forests, possibly in response to accelerating forest dynamics and rising CO2 concentrations. The aboveground biomass of trees was lowest in plots with abundant lianas, suggesting that lianas could reduce forest carbon storage and potentially alter forest dynamics if they continue to proliferate.

  10. Lianas escape self-thinning: Experimental evidence of positive density dependence in temperate lianas Celastrus orbiculatus and C. scandens

    Science.gov (United States)

    Leicht-Young, S. A.; Latimer, A.M.; Silander, J.A.

    2011-01-01

    The neighborhood density of plants strongly affects their growth, reproduction, and survival. In most cases, high density increases competition and negatively affects a focal plant in predictable ways, leading to the self-thinning law. There are, however, situations in which high densities of plants facilitate focal plant performance, resulting in positive density dependence. Despite their importance in forest gap dynamics and distinctive growth form, there have been very few studies of the effect of density on lianas or vines. We grew an invasive (Celastrus orbiculatus) and a native (Celastrus scandens) liana species together in three different density treatments, while also manipulating the light and support availability. We found that across treatment conditions, C. orbiculatus always out-performed C. scandens, showing greater relative growth rate in height and diameter, greater biomass and higher survival. Both species responded similarly to the density treatments: with plants in high density not showing a decrease in relative height growth rate compared to medium density. Aboveground biomass for C. scandens was not affected by density, while for C. orbiculatus, the most massive plants were growing in medium density without support. More surprisingly, survival analysis indicated that the two species both had significantly lower mortality rates in the highest density treatment; this trend held true across the other treatments of light and supports. More generally, this study demonstrates that these lianas can escape the consequences of high density and thus the self-thinning law that affects self-supporting plants. This suggests a broader hypothesis about lianas in general: their greater flexibility in allocating growth resources allows them to grow taller and thinner without collapsing and thereby potentially escape shading and mortality even at high densities.

  11. Lianas as a food resource for brown howlers (Alouatta guariba) and southern muriquis (Brachyteles arachnoides) in a forest fragment

    OpenAIRE

    M. M. Martins

    2009-01-01

    Lianas as a food resource for brown howlers (Alouatta guariba) and southern muriquis (Brachyteles arachnoides) in a forest fragment.— Lianas, woody vines, are abundant and diverse in tropical forests, but their relative contribution as a source of food for herbivores has been neglected. I compared feeding rates on lianas and trees of two sympatric primates, A. guariba and B. arachnoides, in Southeastern Brazil. Availability of liana foods was gathered in parallel with primate behavioral data ...

  12. Different biomechanical design and ecophysiological strategies in juveniles of two liana species with contrasting growth habit

    NARCIS (Netherlands)

    Chen, Y.J.; Bongers, F.; Zhang, J.L.; Liu, J.Y.; Cao, K.F.

    2014-01-01

    Premise of the study: Lianas constitute a major functional type in tropical zones. While some liana species start climbing immediately after germination (shade-avoidance), others have a long self-supporting phase (shade-tolerance). The morphophysiological characteristics of these two growth habits

  13. Structure and composition of the liana assemblage of a mixed rainforest in the Congo Basin

    NARCIS (Netherlands)

    Ewango, C.E.N.; Bongers, F.; Makana, J.R.; Poorter, L.; Sosef, M.S.M.

    2015-01-01

    Background and aims – The Congo Basin lowland forest represents one of the largest tropical forest blocks in the world, but its liana assemblage has never been characterized. We evaluate liana floristics, diversity, and structure in the Ituri Forest, and determine the effects of forest structure and

  14. Taxonomic Diversity of Lianas in Tropical Forests of Northern Eastern Ghats of Andhra Pradesh, India

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    Maradana TARAKESWARA NAIDU

    2014-03-01

    Full Text Available Lianas are important in forest ecosystem and strongly influence the forest dynamics and diversity. Lianas are common in the tropical moist deciduous and rain forests, which are competing with other forest trees. Little information is known on the habitat specialization in tropical lianas diversity and the root causes for variation among forests in liana species composition. A total of 170 liana species (≥ 1.5 cm girth at breast height representing 109 genera and 43 families were reported in 5×5 m quadrate samples along with their climbing modes in the tropical forests of northern Eastern Ghats of Andhra Pradesh, India. A total of 210 grids were sampled in study area and reported that Convolvulaceae was the dominant family with 23 species followed by Papilionaceae, 22 species and Asclepiadaceae, 19 species and Ipomoea was the largest genera. Woody lianas were dominated by 128 species and these are classified into six climbing modes consisting in stem climbers (53.5% that were the most predominant followed by stragglersunarmed (14.7%, stragglers armed and tendril climbers (13.5% each, root climbers (2.9% and hook climbers (1.8%. The most dominant liana species in the northern Eastern Ghats were Acacia sinuata and Bauhinia vahlii. The results of this investigation suggests that better management and protection is an important for in situ conservation of liana diversity and involving local people is emphasized.

  15. Water-use advantage for lianas over trees in tropical seasonal forests

    NARCIS (Netherlands)

    Chen, Y.J.; Cao, K.F.; Schnitzer, S.A.; Fan, Z.X.; Zhang, J.L.; Bongers, F.

    2015-01-01

    Lianas exhibit peak abundance in tropical forests with strong seasonal droughts, the eco-physiological mechanisms associated with lianas coping with water deficits are poorly understood. •We examined soil water partitioning, sap flow, and canopy eco-physiological properties for 99 individuals of 15

  16. Diversity and aboveground biomass of lianas in the tropical seasonal rain forests of Xishuangbanna, SW China

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    Xiao-Tao Lü

    2009-06-01

    Full Text Available Lianas are important components of tropical forests and have significant impacts on the diversity, structure and dynamics of tropical forests. The present study documented the liana flora in a Chinese tropical region. Species richness, abundance, size-class distribution and spatial patterns of lianas were investigated in three 1-ha plots in tropical seasonal rain forests in Xishuangbanna, SW China. All lianas with = 2 cm diameter at breast height (dbh were measured, tagged and identified. A total of 458 liana stems belonging to 95 species (ranging from 38 to 50 species/ha, 59 genera and 32 families were recorded in the three plots. The most well-represented families were Loganiaceae, Annonceae, Papilionaceae, Apocynaceae and Rhamnaceae. Papilionaceae (14 species recorded was the most important family in the study forests. The population density, basal area and importance value index (IVI varied greatly across the three plots. Strychnos cathayensis, Byttneria grandifolia and Bousigonia mekongensis were the dominant species in terms of IVI across the three plots. The mean aboveground biomass of lianas (3 396 kg/ha accounted for 1.4% of the total community aboveground biomass. The abundance, diversity and biomass of lianas in Xishuangbanna tropical seasonal rain forests are lower than those in tropical moist and wet forests, but higher than those in tropical dry forests. This study provides new data on lianas from a geographical region that has been little-studied. Our findings emphasize that other factors beyond the amount and seasonality of precipitation should be included when considering the liana abundance patterns across scales. Rev. Biol. Trop. 57 (1-2: 211-222. Epub 2009 June 30.Las lianas son componentes importantes de los bosques tropicales y tienen importantes impactos en la diversidad, la estructura y la dinámica de los bosques tropicales. El presente estudio documenta la flora de lianas en una región tropical estacional china. La

  17. Root and leaf traits reflect distinct resource acquisition strategies in tropical lianas and trees.

    Science.gov (United States)

    Collins, Courtney G; Wright, S Joseph; Wurzburger, Nina

    2016-04-01

    In Neotropical forests, lianas are increasing in abundance relative to trees. This increased species richness may reflect a positive response to global change factors including increased temperature, atmospheric CO2, habitat fragmentation, and drought severity; however, questions remain as to the specific mechanisms facilitating the response. Previous work suggests that lianas may gain an ecological advantage over trees through leaf functional traits that offer a quick return on investment of resources, although it is unknown whether this pattern extends to root traits and relationships with fungal or bacterial symbionts belowground. We sampled confamilial pairs of liana and tree species and quantified morphological and chemical traits of leaves and fine roots, as well as root symbiont abundance, to determine whether functional traits associated with resource acquisition differed between the two. Compared to trees, lianas possessed higher specific leaf area, specific root length, root branching intensity, and root nitrogen (N) and phosphorus (P) concentrations, and lower leaf and root tissue density, leaf and root carbon (C), root diameter, root C:P and N:P, and mycorrhizal colonization. Our study provides new evidence that liana leaf and root traits are characterized by a rapid resource acquisition strategy relative to trees. These liana functional traits may facilitate their response to global change, raising questions about how increased liana dominance might affect ecosystem processes of Neotropical forests.

  18. Liana infestation impacts tree growth in a lowland tropical moist forest

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    G. M. F. van der Heijden

    2009-10-01

    Full Text Available Ecosystem-level estimates of the effect of lianas on tree growth in mature tropical forests are needed to evaluate the functional impact of lianas and their potential to affect the ability of tropical forests to sequester carbon, but these are currently lacking. Using data collected on tree growth rates, local growing conditions and liana competition in five permanent sampling plots in Amazonian Peru, we present the first ecosystem-level estimates of the effect of lianas on above-ground productivity of trees. By first constructing a multi-level linear mixed effect model to predict individual-tree diameter growth model using individual-tree growth conditions, we were able to then estimate stand-level above-ground biomass (AGB increment in the absence of lianas. We show that lianas, mainly by competing above-ground with trees, reduce tree annual above-ground stand-level biomass increment by ~10%, equivalent to 0.51 Mg dry weight ha−1 yr−1 or 0.25 Mg C ha−1 yr−1. AGB increment of lianas themselves was estimated to be 0.15 Mg dry weight ha−1 yr−1 or 0.07 Mg C ha−1 yr−1, thus only compensating ~29% of the liana-induced reduction in ecosystem AGB increment. Increasing liana pressure on tropical forests will therefore not only tend to reduce their carbon storage capacity, by indirectly promoting tree species with low-density wood, but also their rate of carbon uptake, with potential consequences for the rate of increase in atmospheric carbon dioxide.

  19. Diversity and aboveground biomass of lianas in the tropical seasonal rain forests of Xishuangbanna, SW China.

    Science.gov (United States)

    Lü, Xiao-Tao; Tang, Jian-Wei; Feng, Zhi-Li; Li, Mai-He

    2009-01-01

    Lianas are important components of tropical forests and have significant impacts on the diversity, structure and dynamics of tropical forests. The present study documented the liana flora in a Chinese tropical region. Species richness, abundance, size-class distribution and spatial patterns of lianas were investigated in three 1-ha plots in tropical seasonal rain forests in Xishuangbanna, SW China. All lianas with > or = 2 cm diameter at breast height (dbh) were measured, tagged and identified. A total of 458 liana stems belonging to 95 species (ranging from 38 to 50 species/ha), 59 genera and 32 families were recorded in the three plots. The most well-represented families were Loganiaceae, Annonceae, Papilionaceae, Apocynaceae and Rhamnaceae. Papilionaceae (14 species recorded) was the most important family in the study forests. The population density, basal area and importance value index (IVI) varied greatly across the three plots. Strychnos cathayensis, Byttneria grandifolia and Bousigonia mekongensis were the dominant species in terms of IVI across the three plots. The mean aboveground biomass of lianas (3 396 kg/ha) accounted for 1.4% of the total community above-ground biomass. The abundance, diversity and biomass of lianas in Xishuangbanna tropical seasonal rain forests are lower than those in tropical moist and wet forests, but higher than those in tropical dry forests. This study provides new data on lianas from a geographical region that has been little-studied. Our findings emphasize that other factors beyond the amount and seasonality of precipitation should be included when considering the liana abundance patterns across scales.

  20. Can terrestrial laser scanners (TLSs) and hemispherical photographs predict tropical dry forest succession with liana abundance?

    Science.gov (United States)

    Sánchez-Azofeifa, Gerardo Arturo; Guzmán-Quesada, J. Antonio; Vega-Araya, Mauricio; Campos-Vargas, Carlos; Milena Durán, Sandra; D'Souza, Nikhil; Gianoli, Thomas; Portillo-Quintero, Carlos; Sharp, Iain

    2017-03-01

    Tropical dry forests (TDFs) are ecosystems with long drought periods, a mean temperature of 25 °C, a mean annual precipitation that ranges from 900 to 2000 mm, and that possess a high abundance of deciduous species (trees and lianas). What remains of the original extent of TDFs in the Americas remains highly fragmented and at different levels of ecological succession. It is estimated that one of the main fingerprints left by global environmental and climate change in tropical environments is an increase in liana coverage. Lianas are non-structural elements of the forest canopy that eventually kill their host trees. In this paper we evaluate the use of a terrestrial laser scanner (TLS) in combination with hemispherical photographs (HPs) to characterize changes in forest structure as a function of ecological succession and liana abundance. We deployed a TLS and HP system in 28 plots throughout secondary forests of different ages and with different levels of liana abundance. Using a canonical correlation analysis (CCA), we addressed how the VEGNET, a terrestrial laser scanner, and HPs could predict TDF structure. Likewise, using univariate analyses of correlations, we show how the liana abundance could affect the prediction of the forest structure. Our results suggest that TLSs and HPs can predict the differences in the forest structure at different successional stages but that these differences disappear as liana abundance increases. Therefore, in well known ecosystems such as the tropical dry forest of Costa Rica, these biases of prediction could be considered as structural effects of liana presence. This research contributes to the understanding of the potential effects of lianas in secondary dry forests and highlights the role of TLSs combined with HPs in monitoring structural changes in secondary TDFs.

  1. Lianas as a food resource for brown howlers (Alouatta guariba and southern muriquis (Brachyteles arachnoides in a forest fragment

    Directory of Open Access Journals (Sweden)

    M. M. Martins

    2009-01-01

    Full Text Available Lianas as a food resource for brown howlers (Alouatta guariba and southern muriquis (Brachyteles arachnoides in a forest fragment.— Lianas, woody vines, are abundant and diverse in tropical forests, but their relative contribution as a source of food for herbivores has been neglected. I compared feeding rates on lianas and trees of two sympatric primates, A. guariba and B. arachnoides, in Southeastern Brazil. Availability of liana foods was gathered in parallel with primate behavioral data collection. Liana represented 33.9% and 27.3% of food sources for A. guariba and B. arachnoides, respectively. Foods coming from trees, rather than from lianas, were significantly more consumed by B. arachnoides. However, both species took advantage of the continuously renewable and ephemeral food resources provided by liana. Availability of liana flowers correlated positively with A. guariba feeding proportions. The nutritional supply provided by lianas is apparently beneficial, or at least unharmful, but experiments comparing primate choices in forests with different liana abundances will help to shed light on their possible negative effect on communities.

  2. Chemical Constituents from the Lianas of Gnetum cuspidatum Blume

    International Nuclear Information System (INIS)

    Nik Fatini Nik Azmin; Norizan Ahmat; Nik Khairunissa Nik Abdullah Zawawi; Norizan Ahmat; Nik Khairunissa Nik Abdullah Zawawi

    2016-01-01

    Gnetum is a genus of gymnosperms, the sole genus in the family Gnetaceae with approximately 40 species. Various species has been used for the treatment of rheumatitis, arthritis, bronchitis and asthma in folk medicines. Gnetum cuspidatum Blume is known throughout tropical Southeast Asia from Thailand, Vietnam, Cambodia, Malaysia, Sumatra, Java, and Borneo to the Maluku, Sulawesi and New Guinea. In this research work, a methanol extract of the lianas of Gnetum cuspidatum was subjected to vacuum liquid chromatography for fractionation. Later, several selective fractions had undergone the repetitive radial chromatography technique for further purification. Four known constituents categorized as stilbene type of compound have been successfully isolated and identified which include resveratrol (1), gnetucleistol C (2), gnetucleistol D (3) and gnemonol M (4). The structures and configuration of the reported compounds were elucidated on the basis of 2D-NMR correlations and comparison with the literature. (author)

  3. LIANA Model Integration System - architecture, user interface design and application in MOIRA DSS

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    D. Hofman

    2005-01-01

    Full Text Available The LIANA Model Integration System is the shell application supporting model integration and user interface functionality required for the rapid construction and run-time support of the environmental decision support systems (EDSS. Internally it is constructed as the framework of C++ classes and functions covering most common tasks performed by the EDSS (such as managing of and alternative strategies, running of the chain of the models, supporting visualisation of the data with tables and graphs, keeping ranges and default values for input parameters etc.. EDSS is constructed by integration of LIANA system with the models or other applications such as GIS or MAA software. The basic requirements to the model or other application to be integrated is minimal - it should be a Windows or DOS .exe file and receive input and provide output as text files. For the user the EDSS is represented as the number of data sets describing scenario or giving results of evaluation of scenario via modelling. Internally data sets correspond to the I/O files of the models. During the integration the parameters included in each the data sets as well as specifications necessary to present the data set in GUI and export or import it to/from text file are provided with MIL_LIANA language. Visual C++ version of LIANA has been developed in the frame of MOIRA project and is used as the basis for the MOIRA Software Framework - the shell and user interface component of the MOIRA Decision Support System. At present, the usage of LIANA for the creation of a new EDSS requires changes to be made in its C++ code. The possibility to use LIANA for the new EDSS construction without extending the source code is achieved by substituting MIL_LIANA with the object-oriented LIANA language.

  4. A stable isotopic view on lianas' and trees' below ground competition for water

    Science.gov (United States)

    De Deurwaerder, Hannes; Hervé-Fernández, Pedro; Stahl, Clément; Bonal, Damien; Burban, Benoît; Petronelli, Pascal; Boeckx, Pascal; Verbeeck, Hans

    2017-04-01

    Various studies highlight an increase in liana abundance and biomass in the neotropics in the last decades. To date, the reason why this growth form expresses this trend is still unclear. One of the proposed hypotheses ascribes tropical lianas, in comparison to tropical trees, of being able to adapt better to increased drought conditions resulting from climate change. Moreover, lianas presumably have a deeper root system, providing access to deeper soil layers less susceptible for dehydration during drought events. A dual stable water isotopic approach (δ18O and δ2H) enables studying vegetation below ground competition and in combination with Bayesian mixing models can provide insight in the fractional contribution of distinct soil layer depths. In this perspective, precipitation (bulk and through fall), bulk soil (at different depths), stream and xylem water of both lianas and trees were sampled between October 7-13, 2015. The study focusses on two distinct plots differing in soil texture (sand and clay), localized in close vicinity of the Guyana flux tower at Paracou (French Guyana). Our study highlights the erroneous of the deep tap root hypothesis and provides new insights in water and nutrient competition between tropical lianas and trees during dry season. Lianas isotopic signature is enriched compared to those of trees. This can be linked to water source depth and soil seasonal replenishment. Moreover, liana displaying a very active soil surface root activity, efficiently capturing the low amount of dry season precipitation, while trees show to tap the deeper and less drought susceptible soil layers. A strategy, which not only results in a spatial niche separation in the underground competition for water, but it also provides lianas with a definite advantage in nutrient competition.

  5. The effect of altitude, patch size and disturbance on species richness and density of lianas in montane forest patches

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    Mohandass, Dharmalingam; Campbell, Mason J.; Hughes, Alice C.; Mammides, Christos; Davidar, Priya

    2017-08-01

    The species richness and density of lianas (woody vines) in tropical forests is determined by various abiotic and biotic factors. Factors such as altitude, forest patch size and the degree of forest disturbance are known to exert strong influences on liana species richness and density. We investigated how liana species richness and density were concurrently influenced by altitude (1700-2360 m), forest patch size, forest patch location (edge or interior) and disturbance intensity in the tropical montane evergreen forests, of the Nilgiri and Palni hills, Western Ghats, southern India. All woody lianas (≥1 cm dbh) were enumerated in plots of 30 × 30 m in small, medium and large forest patches, which were located along an altitudinal gradient ranging from 1700 to 2360 m. A total of 1980 individual lianas were recorded, belonging to 45 species, 32 genera and 21 families, from a total sampling area of 13.86 ha (across 154 plots). Liana species richness and density decreased significantly with increasing altitude and increased with increasing forest patch size. Within forest patches, the proportion of forest edge or interior habitat influenced liana distribution and succession especially when compared across the patch size categories. Liana species richness and density also varied along the altitudinal gradient when examined using eco-physiological guilds (i.e. shade tolerance, dispersal mode and climbing mechanism). The species richness and density of lianas within these ecological guilds responded negatively to increasing altitude and positively to increasing patch size and additionally displayed differing sensitivities to forest disturbance. Importantly, the degree of forest disturbance significantly altered the relationship between liana species richness and density to increasing altitude and patches size, and as such is likely the primary influence on liana response to montane forest succession. Our findings suggest that managing forest disturbance in the examined

  6. Seasonal differences in leaf-level physiology give lianas a competitive advantage over trees in a tropical seasonal forest.

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    Cai, Zhi-Quan; Schnitzer, Stefan A; Bongers, Frans

    2009-08-01

    Lianas are an important component of most tropical forests, where they vary in abundance from high in seasonal forests to low in seasonal forests. We tested the hypothesis that the physiological ability of lianas to fix carbon (and thus grow) during seasonal drought may confer a distinct advantage in seasonal tropical forests, which may explain pan-tropical liana distributions. We compared a range of leaf-level physiological attributes of 18 co-occurring liana and 16 tree species during the wet and dry seasons in a tropical seasonal forest in Xishuangbanna, China. We found that, during the wet season, lianas had significantly higher CO(2) assimilation per unit mass (A(mass)), nitrogen concentration (N(mass)), and delta(13)C values, and lower leaf mass per unit area (LMA) than trees, indicating that lianas have higher assimilation rates per unit leaf mass and higher integrated water-use efficiency (WUE), but lower leaf structural investments. Seasonal variation in CO(2) assimilation per unit area (A(area)), phosphorus concentration per unit mass (P(mass)), and photosynthetic N-use efficiency (PNUE), however, was significantly lower in lianas than in trees. For instance, mean tree A(area) decreased by 30.1% from wet to dry season, compared with only 12.8% for lianas. In contrast, from the wet to dry season mean liana delta(13)C increased four times more than tree delta(13)C, with no reduction in PNUE, whereas trees had a significant reduction in PNUE. Lianas had higher A(mass) than trees throughout the year, regardless of season. Collectively, our findings indicate that lianas fix more carbon and use water and nitrogen more efficiently than trees, particularly during seasonal drought, which may confer a competitive advantage to lianas during the dry season, and thus may explain their high relative abundance in seasonal tropical forests.

  7. Introducing tropical lianas in a vegetation model, methods and first results

    Science.gov (United States)

    Verbeeck, Hans; di Porcia, Manfredo; Kearsley, Elizabeth; Longo, Marcos

    2017-04-01

    Lianas are an important component of tropical forests, commonly constituting up to 40% of the woody stems and about 35% of the woody species and contributing substantially to forest leaf biomass. Lianas compete strongly with trees for both above- and below-ground resources. Their indirect impact on the carbon balance, due to their influence on tree community dynamics (by increasing mortality and suppressing tree growth), is far larger than their direct contribution to biomass. Currently tropical forests are experiencing large-scale structural changes, including an increase in liana abundance and biomass. This may eventually reduce the projected carbon sink of tropical forests. Despite their crucial role no single terrestrial ecosystem model has included lianas so far. The goal of this work is to include lianas in a vegetation model and to test it against experimental data. For the purpose we chose ED2 (Ecosystem Demography model version 2), a model that occupies the midpoint on the continuum from gap models that contain individual trees, to area-based global models. ED2 explicitly tracks horizontal and vertical heterogeneity in canopy structure making it very suitable to study liana impacts at a large scale. At the same time, the very inner structure of the model, that is its spatial implicitness, constraints the programming design of this new liana PFT. The first part of the presentation will focus on the current representation of lianas in ED2 and the parameterization that has been used. We will provide reference to the available literature to justify the choices made for parameters and allometries. In the second part first results will be shown where we compare the output of the model with data collected in the Paracou site (French Guiana). The data comes from both inventories and fluxtowers. We will focus mainly on plant density, diameter distributions (demography) and carbon/water fluxes. By comparing runs starting from bare ground, rus starting from observed

  8. Hydraulic architecture of lianas in a semiarid climate: efficiency or safety?

    Directory of Open Access Journals (Sweden)

    Ellen Cristina Dantas Carvalho

    2015-06-01

    Full Text Available Xylem anatomical traits can provide insights regarding the mechanisms affecting the distribution of vascular plants across environmental gradients. In this study, we aimed to investigate the hypothesis that lianas occurring in semiarid environments have characteristics that maximize the xylem resistance to tension-induced cavitation along the root-stem-branch continuum. To gather information regarding the hydraulic architecture of the lianas, we analyzed several anatomical traits of wood: cross-sectional area occupied by the parenchyma (AP, fibers (AF, and vessels (AV; average vessel diameter (d; wood density (WD; pit diameter in the vessel wall (dpit; pit density (Npit, and potential hydraulic conductivity (Kp in branches, stems, and roots of three congeneric species of lianas that occur in two vegetation types of the semiarid regions of Brazil. We found that lianas in these semiarid environments possess a number of the following xylem traits that may allow resistance to tension-induced cavitation:1 lower vessel diameter, lower Kp, and higher hydraulic safety in roots and branches; 2 Dimorphic vessels, ensuring both hydraulic efficiency and safety; and 3 small diameter of pits (potentially associated with a decrease in the membrane area of the vessel pits. This suite of traits may provide insight into mechanisms allowing lianas to occur in semiarid environments.

  9. Biomass allocation and long-term growth patterns of temperate lianas in comparison with trees.

    Science.gov (United States)

    Ichihashi, Ryuji; Tateno, Masaki

    2015-08-01

    The host-dependent support habit of lianas is generally interpreted as a strategy designed to reduce resource investment in mechanical tissues; this allows preferential allocation to leaf and stem extension, thereby enhancing productivity and competitive abilities. However, this hypothesis has not been rigorously tested. We examined the aboveground allometries regarding biomass allocation (leaf mass and current-year stem mass (approximated as biomass allocated to extension growth) vs total aboveground mass) and long-term apparent growth patterns (height and aboveground mass vs age, i.e. numbers of growth rings) for nine deciduous liana species in Japan. Lianas had, on average, three- and five-fold greater leaf and current-year stem mass, respectively, than trees for a given aboveground mass, whereas the time course to reach the forest canopy was comparable and biomass accumulation during that period was only one-tenth that of co-occurring canopy trees. The balance between the lengths of yearly stem extension and existing older stems indicated that lianas lost c. 75% of stem length during growth to the canopy, which is probably a consequence of the host-dependent growth. Our observations suggest that, although lianas rely on hosts mechanically, allowing for short-term vigorous growth, this habit requires a large cost and could limit plant growth over protracted periods. © 2015 The Authors. New Phytologist © 2015 New Phytologist Trust.

  10. Above- and below-ground competition in high and low irradiance: tree seedling responses to a competing liana Byttneria grandifolia

    NARCIS (Netherlands)

    Chen, J.Y.; Bongers, F.; Cao, K.F.; Cai, Z.Q.

    2008-01-01

    Abstract: In tropical forests, trees compete not only with other trees, but also with lianas, which may limit tree growth and regeneration. Liana effects may depend on the availability of above- and below-ground resources and differ between tree species. We conducted a shade house experiment to test

  11. Seasonal differences in leaf-level physiology give lianas a competitive advantage over trees in a tropical seasonal forest

    NARCIS (Netherlands)

    Cai, Z.Q.; Schnitzer, S.A.; Bongers, F.

    2009-01-01

    Lianas are an important component of most tropical forests, where they vary in abundance from high in seasonal forests to low in aseasonal forests. We tested the hypothesis that the physiological ability of lianas to fix carbon (and thus grow) during seasonal drought may confer a distinct advantage

  12. Richness and Abundance of Lianas with Different Diameter Classes in Permanent Plots in the Amazon in Mato Grosso

    Directory of Open Access Journals (Sweden)

    D. G. Ferraz

    2013-11-01

    Full Text Available Lianas are an important component of the structure and diversity of tropical forests and the Amazon biome is one of few natural protected areas that still support the highest level of biodiversity in the world. Generally in disturbed forests high densities of lianas are found than mature forests. The aim of this study is to investigate the richness among families and lianas abundance with different diameter classes in permanent plots in the Amazon of Mato Grosso. To the survey were placed 8 plots of 40 x 250 in a forest fragment that has been management for 30 years, where we sampled lianas species with diameter breast height (DBH ≥ 1 cm. There were sampled 3970 stems in the permanent plots, and the two most abundant were 2 and 6 with 594 and 573 individuals respectively. The richest families were Sapindaceae, Dilleniaceae, Menispermaceae and Fabaceae. These results confirm the hypothesis that disturbed areas have more density of lianas with small DBH.

  13. The impact of lianas on the carbon cycle of tropical forests: a modeling study using the Ecosystem Demography model

    Science.gov (United States)

    di Porcia e Brugnera, M.; Longo, M.; Verbeek, H.

    2017-12-01

    Lianas are an important component of tropical forests, constituting up to 40% of the woody stems and about 35% of the woody species. Tropical forests have been experiencing large-scale structural changes, including an increase in liana abundance and biomass. This may eventually reduce the projected carbon sink of tropical forests. Despite their crucial role no single terrestrial ecosystem model has included lianas so far. Here, we present the very first implementation of lianas in the Ecosystem Demography model (ED2). ED2 is able to represent the competition for water and light between different vegetation types at the regional level. Our new implementation of ED2 is hence suitable to address important questions such as the impact of lianas on the tropical forest carbon balance. We validated the model against forest inventory and eddy covariance flux data at a dry seasonal site (Barro Colorado Island, Panama), and at a wet rainforest site (Paracou, French Guiana). The model was able to represent size structure and carbon accumulation rates. We also evaluated the impact of the unique allocation strategy of lianas on their competitive ability. Lianas invest only a small fraction of their carbon for structural tissues when compared to trees. As a result, lianas benefit from an extra amount of available carbon, however the trade-offs of low allocation on structural tissues are not yet well understood. We are currently investigating a number of hypotheses, including the possibility for lianas to have high turnover rates for leaves and fine roots, or to have high mortality rates due to the loss of structural support when trees die. As such our model allows us to get a better understanding of the role of lianas in the tropical forest carbon cycle.

  14. Woody lianas increase in dominance and maintain compositional integrity across an Amazonian dam-induced fragmented landscape.

    Directory of Open Access Journals (Sweden)

    Isabel L Jones

    Full Text Available Tropical forest fragmentation creates insular biological communities that undergo species loss and changes in community composition over time, due to area- and edge-effects. Woody lianas thrive in degraded and secondary forests, due to their competitive advantage over trees in these habitats. Lianas compete both directly and indirectly with trees, increasing tree mortality and turnover. Despite our growing understanding of liana-tree dynamics, we lack detailed knowledge of the assemblage-level responses of lianas themselves to fragmentation, particularly in evergreen tropical forests. We examine the responses of both sapling and mature liana communities to landscape-scale forest insularization induced by a mega hydroelectric dam in the Brazilian Amazon. Detailed field inventories were conducted on islands created during reservoir filling, and in nearby mainland continuous forest. We assess the relative importance of variables associated with habitat fragmentation such as area, isolation, surrounding forest cover, fire and wind disturbance, on liana community attributes including abundance, basal area, diversity, and composition. We also explore patterns of liana dominance relative to tree saplings and adults ≥10 cm diameter at breast height. We find that 1 liana community composition remains remarkably similar across mainland continuous forest and islands, regardless of extreme area- and edge- effects and the loss of vertebrate dispersers in the latter; and 2 lianas are increasing in dominance relative to trees in the sapling layer in the most degraded islands, with both the amount of forest cover surrounding islands and fire disturbance history predicting liana dominance. Our data suggest that liana communities persist intact in isolated forests, regardless of extreme area- and edge-effects; while in contrast, tree communities simultaneously show evidence of increased turnover and supressed recruitment. These processes may lead to lianas

  15. Disentangling above- and below-ground competition between lianas and trees in a tropical forest

    NARCIS (Netherlands)

    Schnitzer, S.A.; Kuzee, M.E.; Bongers, F.J.J.M.

    2005-01-01

    1 Light is thought to be the most limiting resource in tropical forests, and thus aboveground competition is commonly accepted as the mechanism that structures these communities. In many tropical forests, trees compete not only with other trees, but also with lianas, which compete aggressively for

  16. Tropical dry forest trees and lianas differ in leaf economic spectrum traits but have overlapping water-use strategies.

    Science.gov (United States)

    Werden, Leland K; Waring, Bonnie G; Smith-Martin, Christina M; Powers, Jennifer S

    2017-10-26

    Tree species in tropical dry forests employ a wide range of strategies to cope with seasonal drought, including regulation of hydraulic function. However, it is uncertain if co-occurring lianas also possess a diversity of strategies. For a taxonomically diverse group of 14 tree and 7 liana species, we measured morphological and hydraulic functional traits during an unusual drought and under non-drought conditions to determine (i) if trees have different water-use strategies than lianas and (ii) if relationships among these traits can be used to better understand how tree and liana species regulate diurnal leaf water potential (Ψdiurnal). In this Costa Rican tropical dry forest, lianas and trees had overlapping water-use strategies, but differed in many leaf economic spectrum traits. Specifically, we found that both lianas and trees employed a diversity of Ψdiurnal regulation strategies, which did not differ statistically. However, lianas and trees did significantly differ in terms of certain traits including leaf area, specific leaf area, petiole length, wood vessel diameter and xylem vessel density. All liana and tree species we measured fell along a continuum of isohydric (partial) to anisohydric (strict or extreme) Ψdiurnal regulation strategies, and leaf area, petiole length, stomatal conductance and wood vessel diameter correlated with these strategies. These findings contribute to a trait-based understanding of how plants regulate Ψdiurnal under both drought stress and sufficient water availability, and underscore that lianas and trees employ a similarly wide range of Ψdiurnal regulation strategies, despite having vastly different growth forms. © The Author 2017. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oup.com.

  17. LBA-ECO ND-11 Pre-harvest Forest Tree and Liana Biomass, NW Mato Grosso, Brazil: 2003

    Data.gov (United States)

    National Aeronautics and Space Administration — Tree and liana (vine) measurements were collected in a logging concession at the Fazenda Rohsamar in the municipality of Jurena in northwestern Mato Grosso. Tree...

  18. LBA-ECO ND-11 Pre-harvest Forest Tree and Liana Biomass, NW Mato Grosso, Brazil: 2003

    Data.gov (United States)

    National Aeronautics and Space Administration — ABSTRACT: Tree and liana (vine) measurements were collected in a logging concession at the Fazenda Rohsamar in the municipality of Jurena in northwestern Mato...

  19. Wood anatomy of lianas of sapindaceae commercially used in São Paulo - SP

    Directory of Open Access Journals (Sweden)

    Neusa Tamaio

    2011-12-01

    Full Text Available We performed an anatomical survey of Sapindaceae species growing on the private property that supplies liana fragments to the Adere (Association for the Development and Recovery for the Intellectually Disabled, one of the major producer of art wood marquetry made from the lianas from Sao Paulo. Based on species identification, we carried out both morphological and microscopic analyses of the transversal section of lianas stems, with the aim of separating the species based on wood characters. Only one of the seven analyzed species had no cambial variant (Paullinia trigonia Vell.; the rest presented cambial variant of the compound vascular cylinder type. Also, the six remaining species belong to the following genera: Serjania (Serjania caracasana (Jacq. Willd., Serjania lethalis A. St.-Hill., Serjania laruotteana Cambess., and Serjania multiflora Cambess. These genera could be distinguished by pith configuration, arrangement and quantity of peripheral vascular cylinders, as well as two statistically significant quantitative features: the diameter and frequency of vessel elements. In this work, a key for species identification and illustrations are presented, in addition to comments about the extractivism carried out by Adere.

  20. Contrasting cost-benefit strategy between lianas and trees in a tropical seasonal rain forest in southwestern China.

    Science.gov (United States)

    Zhu, Shi-Dan; Cao, Kun-Fang

    2010-07-01

    Lianas are an important component of tropical forests and often abundant in open habitats, such as tree-fall gaps, forest edges, and disturbed forests. The abundance of lianas in tropical forests has been increasing as a result of global environmental change and increasing forest fragmentation. In order to understand this phenomenon in terms of leaf functional traits and to evaluate their competitive potential, we conducted a cost-benefit analysis of leaves from 18 liana species and 19 tree species in a tropical seasonal rain forest. The results revealed that lianas were scattered in a group distinct from trees along the first axis of a principal component analysis using 15 leaf ecophysiological traits, being located at the quick-return end of the leaf economics spectrum, with higher specific leaf area and photosynthetic rates (A), higher photosynthetic nitrogen (N) and phosphorus (P) use efficiencies, a lower leaf construction cost per unit leaf area (CC) and cost-benefit ratio (CC/A), and a shorter leaf life span (LLS). Trees showed the opposite trends. The results indicate that lianas can grow faster and capture resources more efficiently than trees in disturbed, open habitats. The positive relationship between LLS and CC/A revealed a trade-off between leaf construction cost and benefit over time. The 37 species analyzed had a mean foliar N/P ratio of 20, indicating that the forest was characterized by a P deficit. With an increasing atmospheric CO(2) concentration, the higher nutrient use efficiency could benefit lianas more than trees in terms of productivity, possibly also contributing to the increasing abundance of lianas in nutrient-limited tropical forests.

  1. Development of Allometric Equations for Estimating Above-Ground Liana Biomass in Tropical Primary and Secondary Forests, Malaysia

    Directory of Open Access Journals (Sweden)

    Patrick Addo-Fordjour

    2013-01-01

    Full Text Available The study developed allometric equations for estimating liana stem and total above-ground biomass in primary and secondary forests in the Penang National Park, Penang, Malaysia. Using biomass-diameter-length data of 60 liana individuals representing 15 species, allometric equations were developed for liana stem biomass and total above-ground biomass (TAGB. Three types of allometric equations were developed: models fitted to untransformed, weighted, and log-transformed (log10 data. There was a significant linear relationship between biomass and the predictors (diameter, length, and/or their combinations. The same set of models was developed for primary and secondary forests due to absence of differences in regression line slopes of the forests (ANCOVA: . The coefficients of determination values of the models were high (stem: 0.861 to 0.990; TAGB: 0.900 to 0.992. Generally, log-transformed models showed better fit (Furnival's index, FI 0.5. A comparison of the best TAGB model in this study (based on FI with previously published equations indicated that most of the equations significantly ( overestimated TAGB of lianas. However, a previous equation from Southeast Asia estimated TAGB similar to that of the current equation (. Therefore, regional or intracontinental equations should be preferred to intercontinental equations when estimating liana biomass.

  2. Are lianas more drought-tolerant than trees? A test for the role of hydraulic architecture and other stem and leaf traits

    NARCIS (Netherlands)

    Sande, van der M.T.; Poorter, L.; Schnitzer, S.A.; Markesteijn, L.

    2013-01-01

    Lianas are an important component of Neotropical forests, where evidence suggests that they are increasing in abundance and biomass. Lianas are especially abundant in seasonally dry tropical forests, and as such it has been hypothesized that they are better adapted to drought, or that they are at an

  3. Anatomia do lenho de oito espécies de lianas da família Leguminosae ocorrentes na Floresta Atlântica Wood anatomy of eight liana species of Leguminosae family from Atlantic Rain Forest

    Directory of Open Access Journals (Sweden)

    Arno Fritz das Neves Brandes

    2008-06-01

    Full Text Available Lianas são importantes componentes estruturais das florestas tropicais, apesar disso a anatomia destes vegetais é pouco estudada. A família Leguminosae é relatada como a segunda maior em número de espécies de lianas, contudo pouco se conhece da diversidade anatômica das lianas desta família. O presente estudo descreveu e analisou a anatomia do lenho de oito espécies de lianas da família Leguminosae, ocorrentes no Parque Nacional do Itatiaia, localizado no Estado do Rio de Janeiro, região Sudeste do Brasil, local inserido no bioma Floresta Atlântica. As espécies apresentaram características comuns ao hábito liana, como: elementos de vaso com diâmetro elevado, com duas categorias de diâmetro; e maior proporção de parênquima axial em comparação às fibras. Quatro espécies do gênero Senegalia apresentaram variações cambiais produzidas por um único câmbio, normal em produto mas anormal em conformação. A anatomia do lenho das espécies estudadas é muito semelhante por compartilharem o mesmo hábito e pertencerem à mesma família. Apesar disso, as oito espécies estudadas puderam ser diferenciadas. As espécies com variações cambiais e Dalbergia frutescens são facilmente diferenciadas das demais. Contudo Senegalia tenuifolia, Piptadenia micracantha e Piptadenia adiantoides necessitam ser examinadas com muita cautela para identificá-las exclusivamente pela anatomia do lenho.Lianas are important structural component of tropical forests and even though the anatomy of these plants is poorly studied. Leguminosae family is reported as the second larger family in number of liana species, but little is know about the anatomical diversity of lianas from this family. The present study described and analyzed the wood anatomy of eight liana species of Leguminosae family, from Parque Nacional do Itatiaia, located in Rio de Janeiro State, Southeast region of Brazil and included in Atlantic Rain Forest Biome. The species show

  4. Water uptake and transport in lianas and co-occurring trees of a seasonally dry tropical forest.

    Science.gov (United States)

    José Luis Andrade; Frederick C. Meinzer; Guillermo Goldstein; Stefan A. Schnitzer

    2005-01-01

    Water uptake and transport were studied in eight liana species in a seasonally dry tropical forest on Barro Colorado Island, Panama. Stable hydrogen isotope composition (δD) of xylem and soil water, soil volumetric water content (θv), and basal sap flow were measured during the 1997 and...

  5. Effects of liana load, tree diameter and distances between conspecifics on seed production in tropical timber trees

    DEFF Research Database (Denmark)

    Nabe-Nielsen, Jacob; Kollmann, Johannes Christian; Peña-Claros, Marielos

    2009-01-01

    Seed production in tropical timber trees is limited by abiotic resources, pollination and pre-dispersal seed predation. Resource availability is influenced by the number of competing trees and by lianas that often reach high densities in disturbed parts of tropical forests. The distance between c...... seed trees can considerably improve seed production. In some species seed production may be further improved by ensuring that seed trees are located far apart....

  6. A liana from the lower Miocene of Panama and the fossil record of Connaraceae.

    Science.gov (United States)

    Jud, Nathan A; Nelson, Chris W

    2017-05-01

    Permineralized wood is common in the Miocene beds exposed during the expansion of the Panama Canal. We describe a stem with the distinctive anatomy of a liana and evaluate the evolutionary, biogeographic, and ecological significance of this discovery. The object of the study was obtained from a collection of fossil woods and fruits from a locality in the lower Miocene Cucaracha Formation, where the formation is exposed by the Culebra Cut of the Panama Canal. Thin sections were prepared using the cellulose acetate peel technique and examined using transmitted light microscopy. We described the anatomy and compared it with that of extant and fossil species. We also reviewed and evaluated published reports of fossils attributed to Connaraceae. The anatomy of this fossil wood matches the genus Rourea (Connaraceae). The stem is only 1 cm in diameter, but vessels >200 μm in diameter also occur, indicating the perennial climbing habit. We evaluated 12 other pre-Quaternary occurrences attributed to Connaraceae. Four are accepted, three are rejected, and we consider five unknown or uncertain. The discovery of this Rourea stem confirms the presence of Connaraceae in the Neotropics by the early Miocene, provides the oldest evidence of the climbing habit in the family, and contributes to our understanding of the flora of Panama 19 mya. Although the fossil record of Connaraceae is sparse, reliable occurrences span three continents and indicate that the family originated as early as the Late Cretaceous-Paleocene and was widespread by the early Miocene. © 2017 Botanical Society of America.

  7. Exploring the bark thickness-stem diameter relationship: clues from lianas, successive cambia, monocots and gymnosperms.

    Science.gov (United States)

    Rosell, Julieta A; Olson, Mark E; Anfodillo, Tommaso; Martínez-Méndez, Norberto

    2017-07-01

    Bark thickness is ecologically crucial, affecting functions from fire protection to photosynthesis. Bark thickness scales predictably with stem diameter, but there is little consensus on whether this scaling is a passive consequence of growth or an important adaptive phenomenon requiring explanation. With a comparative study across 913 species, we test the expectation that, if bark thickness-stem diameter scaling is adaptive, it should be possible to find ecological situations in which scaling is predictably altered, in this case between species with different types and deployments of phloem. 'Dicots' with successive cambia and monocots, which have phloem-free bark, had predictably thinner inner (mostly living) bark than plants with single cambia. Lianas, which supply large leaf areas with limited stem area, had much thicker inner bark than self-supporting plants. Gymnosperms had thicker outer bark than angiosperms. Inner bark probably scales with plant metabolic demands, for example with leaf area. Outer bark scales with stem diameter less predictably, probably reflecting diverse adaptive factors; for example, it tends to be thicker in fire-prone species and very thin when bark photosynthesis is favored. Predictable bark thickness-stem diameter scaling across plants with different photosynthate translocation demands and modes strongly supports the idea that this relationship is functionally important and adaptively significant. © 2017 The Authors. New Phytologist © 2017 New Phytologist Trust.

  8. Selective logging in tropical forests decreases the robustness of liana-tree interaction networks to the loss of host tree species.

    Science.gov (United States)

    Magrach, Ainhoa; Senior, Rebecca A; Rogers, Andrew; Nurdin, Deddy; Benedick, Suzan; Laurance, William F; Santamaria, Luis; Edwards, David P

    2016-03-16

    Selective logging is one of the major drivers of tropical forest degradation, causing important shifts in species composition. Whether such changes modify interactions between species and the networks in which they are embedded remain fundamental questions to assess the 'health' and ecosystem functionality of logged forests. We focus on interactions between lianas and their tree hosts within primary and selectively logged forests in the biodiversity hotspot of Malaysian Borneo. We found that lianas were more abundant, had higher species richness, and different species compositions in logged than in primary forests. Logged forests showed heavier liana loads disparately affecting slow-growing tree species, which could exacerbate the loss of timber value and carbon storage already associated with logging. Moreover, simulation scenarios of host tree local species loss indicated that logging might decrease the robustness of liana-tree interaction networks if heavily infested trees (i.e. the most connected ones) were more likely to disappear. This effect is partially mitigated in the short term by the colonization of host trees by a greater diversity of liana species within logged forests, yet this might not compensate for the loss of preferred tree hosts in the long term. As a consequence, species interaction networks may show a lagged response to disturbance, which may trigger sudden collapses in species richness and ecosystem function in response to additional disturbances, representing a new type of 'extinction debt'. © 2016 The Author(s).

  9. Florística de lianas em um fragmento de floresta estacional semidecidual, Parque Estadual de Vassununga, Santa Rita do Passa Quatro, SP, Brasil Floristic of lianas in a fragment of seasonal semidecidual forest State Park of Vassununga, Santa Rita do Passa Quatro, São Paulo State, Brazil

    Directory of Open Access Journals (Sweden)

    Yara Junqueira de Azevedo Tibiriçá

    2006-06-01

    Full Text Available Embora o conhecimento sobre a florística dos fragmentos de florestas estacionais semideciduais tenha crescido nos últimos anos, ainda sabe-se pouco sobre a comunidade de lianas (lenhosas ou herbáceas nesses fragmentos. Assim, foi realizado o levantamento florístico de lianas na gleba Maravilha, pertencente ao Parque Estadual de Vassununga (Santa Rita do Passa Quatro, SP, a fim de colaborar com o conhecimento dessa comunidade e subsidiar futuros trabalhos que envolvam essa forma de vida. A área de estudo compreende 127,08 ha, com inverno seco e temperatura média anual de 22 ºC. Para a coleta do material, percorreu-se mensalmente toda a borda do fragmento e três trilhas no interior da mata, de agosto/2002 a setembro/2003. Foram identificadas 120 espécies de lianas, pertencentes a 30 famílias e 71 gêneros, das quais 51% das espécies são volúveis, 42% apresentam gavinhas e apenas 7% são escandentes. As famílias mais representativas em número de espécies foram: Bignoniaceae (26, Malpighiaceae (14, Sapindaceae (12 e Asteraceae (9. Houve baixa similaridade florística entre as espécies de lianas presentes na gleba Maravilha em relação a outras áreas de florestas estacionais semideciduais do interior paulista.Although the knowledge about the floristic composition of the fragments of seasonal semidecidual forest had grown in the last few years, little is known about the liana communities (woody vines and herbaceous vines in those fragments. To collaborate with the knowledgement of the lianas and subsidize future works involving this life form, a floristic survey of the liana species occurring at the fragment Maravilha of the State Park of Vassununga (Santa Rita do Passa Quatro - SP was carried out. The study area comprised 127.08ha, with average temperature of 22 ºC. The whole border of the forest fragment and three tracks inside the forest were surveyed monthly between August 2002 and September 2003. One hundred and twenty species

  10. Short-term spatial variation in the demography of a common Neotropical liana is influenced by environmental factors

    DEFF Research Database (Denmark)

    Franci, Luciana De Campos; Nabe-Nielsen, Jacob; Svenning, Jens-Christian

    2016-01-01

    equilibrium (k = 1). In both periods, elasticity was higher for survival of large climbers than for other fates. The best models varied between life stages and periods, indicating that the impact of environmental factors on demographic rates changed through time. Model selection suggested that the influence......We used matrix models to investigate the relation between population dynamics of the liana Mansoa difficilis and environmental factors in frag- mented Atlantic forest in Brazil. The fate (growth and mortality) of individuals and the number of new individuals were recorded for 3 years in 100 plots...... of 10 m 9 10 m each. We used multinomial logistic regressions to assess the influence of environmental factors on the fate of individuals in different life stages. Adopting AIC for model selection, we tested a range of models including different groups of environmental variables: soil nutrients, water...

  11. Leaf allocation patterns and 13C and 15N natural abundances of tropical lianas (Passiflora sp.) as dependent on external climbing support.

    Science.gov (United States)

    Werth, Martin; Spiegel, Ann-Kathrin; Kazda, Marian

    2013-01-01

    The transformation from self-supporting lianas to host-supported climbing lianas is related to re-allocation of biomass and nutrients among plant organs. Therefore, first, variations in leaf mass per area (LMA), leaf carbon and nitrogen allocation and (13)C and (15)N natural abundances were analysed among three tropical Passiflora species (P. edulis, P. ligularis, and P. tripartita) in a greenhouse study. Second, the influence of a climbing support was considered for each species and parameter. P. ligularis leaves were most enriched in (13)C in both treatments when compared with the other two species. This enrichment was caused by a high LMA, which is related to a high internal resistance to CO(2) diffusion. For P. edulis and P. tripartita, δ(13)C was additionally increasing with nitrogen content per area. Generally, there were no differences when considering carbon and nitrogen allocation to leaves of host-supported and self-supporting lianas. The only hints towards increased investment into leaves after the transition from self-supporting to host-supported stages could be seen by a trend to increased leaf areas and masses. δ(13)C values of supported P. edulis or P. tripartita plants were significantly increasing faster than those of non-supported plants once the interactions of leaf mass or nitrogen content per area were accounted for. Hence, the offer of a climbing support had only a minor impact on δ(13)C or δ(15)N values in vitro, but this could be different with increasing age of lianas in vivo.

  12. Antileukemic ancistrobenomine B and related 5,1'-coupled naphthylisoquinoline alkaloids from the Chinese liana Ancistrocladus tectorius.

    Science.gov (United States)

    Bringmann, Gerhard; Seupel, Raina; Feineis, Doris; Xu, Minjuan; Zhang, Guoliang; Kaiser, Marcel; Brun, Reto; Seo, Ean-Jeong; Efferth, Thomas

    2017-09-01

    A striking feature of the metabolite pattern of the Southeast Asian liana Ancistrocladus tectorius (Ancistrocladaceae) is the predominance of 5,1'-coupled naphthylisoquinoline alkaloids. About 20 alkaloids of this coupling type have so far been discovered in this plant species. Here, we report on the isolation of four new 5,1'-linked naphthylisoquinolines from the twigs and stems of A. tectorius. Two of them, the ancistrobenomines B (5) and C (6), belong to the very rare group of alkaloids with a fully dehydrogenated isoquinoline portion. Likewise unusual for naphthylisoquinoline alkaloids is the presence of a hydroxymethylene group at C-3. Within the large class of meanwhile ca. 180 such natural products, this structural peculiarity had so far been known only from two other representatives isolated from the Malaysian species A. benomensis, and from one single naphthalene-devoid 3-hydroxymethyleneisoquinoline from A. tectorius. Seven further 5,1'-linked alkaloids, previously isolated from related Asian and African Ancistrocladus species, have now been identified for the first time in A. tectorius. Their structural elucidation was achieved by spectroscopic analysis including HRESIMS, 1D and 2D NMR, and by chemical (oxidative degradation) and chiroptical (electronic circular dichroism) methods. Ancistrobenomine B (5) exhibited moderate effects against Plasmodium falciparum and Trypanosoma brucei rhodesiense in vitro, and it was found to display strong cytotoxic activities against drug-sensitive acute lymphoblastic CCRF-CEM leukemia cells and their multidrug-resistant subline, CEM/ADR5000. Copyright © 2017 Elsevier B.V. All rights reserved.

  13. Dual mycorrhizal colonization of forest-dominating tropical trees and the mycorrhizal status of non-dominant tree and liana species.

    Science.gov (United States)

    McGuire, K L; Henkel, T W; Granzow de la Cerda, I; Villa, G; Edmund, F; Andrew, C

    2008-04-01

    The contribution of mycorrhizal associations to maintaining tree diversity patterns in tropical rain forests is poorly known. Many tropical monodominant trees form ectomycorrhizal (EM) associations, and there is evidence that the EM mutualism contributes to the maintenance of monodominance. It is assumed that most other tropical tree species form arbuscular mycorrhizal (AM) associations, and while many mycorrhizal surveys have been done, the mycorrhizal status of numerous tropical tree taxa remains undocumented. In this study, we tested the assumption that most tropical trees form AM associations by sampling root vouchers from tree and liana species in monodominant Dicymbe corymbosa forest and an adjacent mixed rain forest in Guyana. Roots were assessed for the presence/ absence of AM and EM structures. Of the 142 species of trees and lianas surveyed, three tree species (the mono-dominant D. corymbosa, the grove-forming D. altsonii, and the non-dominant Aldina insignis) were EM, 137 were exclusively AM, and two were non-mycorrhizal. Both EM and AM structures wer e observed in D. corymbosa and D. altsonii. These results provide empirical data supporting the assumption that most tropical trees form AM associations for this region in the Guiana Shield and provide the first report of dual EM/AM colonization in Dicymbe species. Dual colonization of the Dicymbe species should be further explored to determine if this ability contributes to the establishment and maintenance of site dominance.

  14. The study of lianas

    NARCIS (Netherlands)

    Jacobs, M.

    1976-01-01

    Take almost any profile diagram of rain forest and it reveals you the neglect: nothing but trees. Even in Flora Malesiana* the manner of their climbing is not always indicated. Foresters regard them as weeds and persecute them systematically (see FOX 1968), which subjects them to extra dangers

  15. In situ temperature response of photosynthesis of 42 tree and liana species in the canopy of two Panamanian lowland tropical forests with contrasting rainfall regimes.

    Science.gov (United States)

    Slot, Martijn; Winter, Klaus

    2017-05-01

    Tropical forests contribute significantly to the global carbon cycle, but little is known about the temperature response of photosynthetic carbon uptake in tropical species, and how this varies within and across forests. We determined in situ photosynthetic temperature-response curves for upper canopy leaves of 42 tree and liana species from two tropical forests in Panama with contrasting rainfall regimes. On the basis of seedling studies, we hypothesized that species with high photosynthetic capacity - light-demanding, fast-growing species - would have a higher temperature optimum of photosynthesis (T Opt ) than species with low photosynthetic capacity - shade-tolerant, slow-growing species - and that, therefore, T Opt would scale with the position of a species on the slow-fast continuum of plant functional traits. T Opt was remarkably similar across species, regardless of their photosynthetic capacity and other plant functional traits. Community-average T Opt was almost identical to mean maximum daytime temperature, which was higher in the dry forest. Photosynthesis above T Opt appeared to be more strongly limited by stomatal conductance in the dry forest than in the wet forest. The observation that all species in a community shared similar T Opt values suggests that photosynthetic performance is optimized under current temperature regimes. These results should facilitate the scaling up of photosynthesis in relation to temperature from leaf to stand level in species-rich tropical forests. © 2017 The Authors. New Phytologist © 2017 New Phytologist Trust.

  16. Cobertura de lianas no dossel florestal e seus efeitos sobre a regeneração de espécies arbóreas. Liana’s coverture in the forest canopy and its effects on regeneration of tree species.

    Directory of Open Access Journals (Sweden)

    Mariane Martins RODRIGUES

    2016-06-01

    Full Text Available A regeneração natural é um bom indicador da capacidade de perpetuação das espécies arbóreas e da manutenção da biodiversidade em fragmentos florestais. O estado de conservação desses remanescentes está diretamente relacionado ao seu tamanho, tipo de vizinhança e grau de perturbação. A abundância de lianas vem sendo apontada como um indicador de degradação afetando diretamente a regeneração natural. Desse modo, é importante a avaliação da presença e cobertura de lianas no dossel das árvores e verificar sua influência na regeneração natural. Neste estudo, avaliou-se a participação das lianas na cobertura do dossel de uma Floresta Estacional Semidecidual inserida em uma matriz de pastagem, procurando relacioná-la com a regeneração natural. Para avaliar essa regeneração foram instalados e avaliados doze transectos radiais perpendiculares à borda do fragmento. Observou-se que as maiores densidades de regeneração foram encontradas nas áreas em que a cobertura do dossel estava acima de 80%, independentemente de sua composição (lianas ou árvores, indicando que a cobertura por lianas também contribui positivamente para o desenvolvimento dos regenerantes. Natural regeneration is a good indicator of the perpetuation capacity and maintenance of biodiversity in forest fragments. The state of conservation of forest fragments is directly related to its size, neighborhood type and degree of disturbance. The abundance of lianas has been identified as an indicator of degradation directly affecting the natural regeneration. Thus, it is important to evaluate liana’s presence and cover in the canopy of trees and verify its influence on the natural regeneration. In this study it was evaluated the participation of lianas in the canopy cover of a Seasonal Semideciduous Forest inserted in a grassland matrix and its relationship to natural regeneration. To evaluate this regeneration it were installed and evaluated twelve

  17. Development of air conditioning system using ecological shading window. Part 1. Characteristics of temperature transpiration rate on liana; Ecological shading window system no kaihatsu. 1. Tsuru shokubutsu no josan sokudo no ondo tokusei

    Energy Technology Data Exchange (ETDEWEB)

    Kudo, T.; Tanaka, H.; Tokunaga, M. [Kajima Corp., Tokyo (Japan)

    1994-10-31

    This paper summarizes an air conditioning system using an ecological shading window. The system uses plants in a double window in place of a blind to cut off sunlight, and operates the room air conditioning equipment combined with the plant utilization. Its features may be summarized as follows: perimeter cooling load in summer and perimeter heating load in winter can be reduced; and the plants purify the air in rooms, making clean humidification possible. Four kinds of liana were used to experiment the temperature characteristics of their transpiration. The transpiration rate, photosynthesizing rate and leaf temperature were measured, and the following findings were obtained: such plants that are adapted to weak light as philodendron and potos cannot control the leaf temperature under such a high illuminance and temperature as in the experimental condition, hence are not suitable for this system; and plants that have high transpiration rate under high temperatures such as ivy and cucumber can control the leaf temperature, performing photosynthesis stably, hence are suitable for the system. Insolation reducing effect was trially calculated. In the case of using ivy, the insolation can be cut down by 41% because of the transpiration cooling effect. 5 refs., 5 figs., 1 tab.

  18. Trichome structure and evolution in Neotropical lianas.

    Science.gov (United States)

    Nogueira, Anselmo; Ottra, Juliana Hanna Leite El; Guimarães, Elza; Machado, Silvia Rodrigues; Lohmann, Lúcia G

    2013-11-01

    Trichomes are epidermal outgrowths generally associated with protection against herbivores and/or desiccation that are widely distributed from ferns to angiosperms. Patterns of topological variation and morphological evolution of trichomes are still scarce in the literature, preventing valid comparisons across taxa. This study integrates detailed morphoanatomical data and the evolutionary history of the tribe Bignonieae (Bignoniaceae) in order to gain a better understanding of current diversity and evolution of trichome types. Two sampling schemes were used to characterize trichome types: (1) macromorphological characterization of all 105 species currently included in Bignonieae; and (2) micromorphological characterization of 16 selected species. Individual trichome morphotypes were coded as binary in each vegetative plant part, and trichome density and size were coded as multistate. Ancestral character state reconstructions were conducted using maximum likelihood (ML) assumptions. Two main functional trichome categories were found: non-glandular and glandular. In glandular trichomes, three morphotypes were recognized: peltate (Pg), stipitate (Sg) and patelliform/cupular (P/Cg) trichomes. Non-glandular trichomes were uniseriate, uni- or multicellular and simple or branched. Pg and P/Cg trichomes were multicellular and non-vascularized with three clearly distinct cell layers. Sg trichomes were multicellular, uniseriate and long-stalked. ML ancestral character state reconstructions suggested that the most recent common ancestor (MRCA) of Bignonieae probably had non-glandular, Pg and P/Cg trichomes, with each trichome type presenting alternative histories of appearance on the different plant parts. For example, the MRCA of Bignonieae probably had non-glandular trichomes on the stems, prophylls, petiole, petiolule and leaflet veins while P/Cg trichomes were restricted to leaflet blades. Sg trichomes were not present in the MRCA of Bignonieae independently of the position of these trichomes. These trichomes had at least eight independent origins in tribe. The patterns of trichome evolution indicate that most morphotypes are probably homologous in Bignonieae and could be treated under the same name based on its morphological similarity and common evolutionary history, in spite of the plethora of names that have been previously designated in the literature. The trichome descriptions presented here will facilitate comparisons across taxa, allowing inferences on the relationsthips between trichome variants and future studies about their functional properties.

  19. Papilionoideae (Leguminosae arbóreas e lianas na estação de pesquisa, treinamento e educação ambiental (EPTEA, Mata do Paraíso, Viçosa, Zona da Mata Mineira Trees and lianes of the papilionoideae (Leguminosae in the research, training and environmental education station (EPTEA, Mata do Paraíso, Viçosa, Zona da Mata Mineira

    Directory of Open Access Journals (Sweden)

    Izabella Martins da Costa Rodrigues

    2007-01-01

    Full Text Available Este trabalho consiste em um levantamento florístico das árvores e lianas pertencentes à Papilionoideae da Mata do Paraíso, importante fragmento de Floresta Estacional Semidecidual Submontana, no Município de Viçosa, Zona da Mata mineira. A pesquisa de campo foi realizada por meio de visitas à área de estudo, no período de julho/2004 a agosto/2005. Foram reconhecidos 12 táxons infra-específicos pertencentes a oito gêneros, sendo Machaerium Pers. (4 spp. e Dalbergia L. f. (2 spp. os mais representativos. São apresentados chaves de identificação, descrições, ilustrações e comentários sobre os táxons analisados. Dalbergia nigra (Vell. Allemão ex Benth., espécie vulnerável, e Ormosia vicosana Rudd, endêmica da região, foram encontradas na EPTEA.This work is a floristic survey of trees and lianas of the Papilionoideae in the Mata do Paraíso, an important fragment of Submontane Semideciduous Seasonal Forest, in Viçosa, Zona da Mata Mineira. The fieldwork was carried out through visits to the studied area, from July/2004 to August/2005. Twelve taxa represented by eight genera were recorded. Machaerium Pers. (4spp. and Dalbergia L. f. (2 spp. were the most representatives. Identification keys, descriptions and illustrations are presented for the analyzed taxa. Dalbergia nigra (Vell. Allemão ex Benth., vulnerable species and, Ormosia vicosana Rudd, endemic for the region were found at EPTEA.

  20. Role of lianas for introduced chimpanzees (Pan troglodytes) on Rubondo Island, Tanzania

    Czech Academy of Sciences Publication Activity Database

    Moscovice, L. R.; Petrželková, Klára Judita; Issa, M. H.; Huffman, M. A.; Snowdon, C. T.; Mbago, F.; Kaur, T.; Singh, J.; Graziani, G.

    2004-01-01

    Roč. 75, S1 (2004), s. 308 ISSN 0015-5713. [Congress of the International Primatological Society /20./. Torino, 22.08.2004-28.08.2004] Institutional research plan: CEZ:AV0Z6093917 Keywords : Pan troglodytes * reintroduction * Rubondo Subject RIV: EH - Ecology, Behaviour Impact factor: 0.913, year: 2004

  1. The Growth Form of Croton pullei (Euphorbiaceae) - Functional Morphology and Biomechanics of a Neotropical Liana

    NARCIS (Netherlands)

    Gallenmüller, F.; Müller, U.; Rowe, N.; Speck, T.

    2001-01-01

    Croton pullei (Euphorbiaceae) is a woody climber of the lowland rainforest in French Guyana and Surinam. During ontogeny, a shift from a juvenile free-standing growth phase to an older supported growth phase is observed. The following biomechanical parameters were studied: structural Young's

  2. Fjodor Berman : "Nado umet terjat dengi" / Fjodor Berman ; interv. Liana Turpakova

    Index Scriptorium Estoniae

    Berman, Fjodor, 1951-

    2006-01-01

    BLRT Grupp ühendab 61 firmat kuues riigis, aktsionärid on aastate jooksul kogu teenitud raha suunanud kontserni arengusse. BLRT Grupi arengust, probleemidest kvalifitseeritud tööjõuga, majandus- ja kommunikatsiooniministeeriumi suhtumisest. Juhatuse esimehe Fjodor Bermani karjäärist Eestis, puhkusest ja vaba aja veetmisest, perekonnast

  3. Vai mēs kļūsim par Baltijas baskiem jeb Kā būt pārstāvētiem? / Jāns Undusks ; no igauņu valodas tulkojusi Maima Grīnberga-Preisa

    Index Scriptorium Estoniae

    Undusk, Jaan, 1958-

    2005-01-01

    Teksti aluseks on ettekanne 8. Balti vaimse koostöö konverentsil 16. juunil 2001 Tallinnas: Are we Basques of Baltic? The problem of how to be represented. Eesti k.: Looming, 2002, nr. 9. Orig.: Kas meist saavad balti baskid ehk kuidas olla esindatud?

  4. Eric Alan Johnson : "Mne nravitsja tot duhh, kotorõi tõ oshtshushtshaejesh v Pitere" / Eric Alan Johnson ; interv. Liana Turpakova

    Index Scriptorium Estoniae

    Johnson, Eric Alan

    2008-01-01

    USA saatkonna Eestis pressiatashee vastab küsimustele, mis puudutavad tema elukäiku, vene keele õppimist, huvi Venemaa vastu, elu Leningradis, ülikoolis õppimist, tööd diplomaadina Moskvas ja Peterburis, muusika- ja kirjandushuvi

  5. PENDUGAAN BIOMASSA INDIVIDU DAN ANALISIS CITRA LANDSAT LAHAN HUTAN TERPAPAR SPESIES LIANA INVASIF MERREMIA PELTATA DI TAMAN NASIONAL BUKIT BARISAN SELATAN

    Directory of Open Access Journals (Sweden)

    Yansen Yansen

    2014-11-01

    Forest vegetation plays an important role in balancing carbon sequestration. Consequently, less forest vegetation means less ability of forest to absorb carbon. Forest opening does not only decrease the carbon stocks but it could also initiate the development of unwanted invasive species. Therefore, the estimation of carbon absorption by forest area covered by certain vegetation, such as invasive plant species, is needed. Plant biomass estimation can be done by applying allometry, i.e. the relationship between one plant variable, such as diameter or height/length, with the plant total biomass/carbon. This study shows that for climbing plant M. peltata, plant height is the appropriate variable that can be used to estimate plant biomass. This study also shows that areas with different types of vegetation cover have different NDVI (normalized difference vegetation index. However, the NDVI values of area covered by M. peltata and secondary forests are not significantly different. This study provides additional insights of the ability of different forest vegetation covers to absorb carbon, which might be useful for the management of conservation forests.

  6. Stimulation of interleukin-1 and -6 production in alveolar macrophages by the neotropical liana, Uncaria tomentosa (uña de gato)

    Science.gov (United States)

    Lemaire, I; Assinewe, V; Cano, P; Awang, D V; Arnason, J T

    1999-02-01

    Two extracts of different collections of the traditional medicine uña de gato (Uncaria tomentosa) from Peru were characterized by High Pressure Liquid Chromatography as containing approximately 6 mg/g total oxindole content prior to studies with alveolar macrophages. The plant preparations greatly stimulated IL-1 and IL-6 production by rat macrophages in a dose dependent manner in the range of 0.025-0.1 mg/ml. They were also able to enhance IL-1 and -6 in lipopolysaccharide-stimulated macrophages. The results suggest a strong immunostimulant action of this plant.

  7. Okupatsiooni-argumendi käsitlemine Lätit puudutavates Euroopa Inimõiguste Kohtu lahendites : [bakalaureusetöö] / Liana Lemkov ; Tartu Ülikool, õigusteaduskond ; juhendaja: Lauri Mälksoo

    Index Scriptorium Estoniae

    Lemkov, Liana

    2009-01-01

    Kodakondsusega seotud küsimustest Euroopa Inimõiguste Kohtus, okupatsiooni-argumendist (Läti kaasused), riigi õigusest kaitsta demokraatiat ja majandust (Läti kaasused), sõjakuritegudest ja topelt-okupatsioonist (Läti kaasus)

  8. 76 FR 27175 - Quarterly Publication of Individuals Who Have Chosen To Expatriate, as Required by Section 6039G

    Science.gov (United States)

    2011-05-10

    ... JOHNSTON ANNIE F JONES TIMOTHY TAYLOR KAISER DONALD LANCE KAITHAN ANDREAS KURT KANG MICHAEL KATO KAORU KATO... GREGORY ROBERT MURRAY TOVE LIANA NAGY MARKUS MICHAEL NARGOLWALA APARNA NEEDHAM DAVID FREDERICK NEEDHAM...

  9. Journal of Language, Technology & Entrepreneurship in Africa - Vol ...

    African Journals Online (AJOL)

    Analysis of Women Small Scale Entrepreneurs Practices during Business Negotiations in Tanzania Agribusiness · EMAIL FREE FULL TEXT EMAIL FREE FULL TEXT DOWNLOAD FULL TEXT DOWNLOAD FULL TEXT. Felix Adamu Nandonde, Pamela John Liana, 28-45 ...

  10. LBA-ECO CD-02 Leaf Level Gas Exchange, Chemistry, and Isotopes, Amazonia, Brazil

    Data.gov (United States)

    National Aeronautics and Space Administration — ABSTRACT: This data set reports leaf gas flux and leaf properties from samples collected from trees, liana, pasture saplings, and pasture grass located at eight...

  11. LBA-ECO CD-02 Leaf Level Gas Exchange, Chemistry, and Isotopes, Amazonia, Brazil

    Data.gov (United States)

    National Aeronautics and Space Administration — This data set reports leaf gas flux and leaf properties from samples collected from trees, liana, pasture saplings, and pasture grass located at eight different...

  12. 76 FR 52961 - Agency Information Collection Activities: Form N-300; Revision of an Existing Information...

    Science.gov (United States)

    2011-08-24

    ... documentary requirements for those seeking to work in certain occupations or professions, or to obtain various... 18, 2011. Liana Miranda-Valido, Management and Program Analyst, Regulatory Products Division, Office...

  13. LBA-ECO CD-02 Leaf Water Potential, Forest and Pasture Sites, Para, Brazil: 2000-2001

    Data.gov (United States)

    National Aeronautics and Space Administration — Data are reported for leaf water potential of leaves of seven species of trees and lianas from the primary forest at the km 67 Tower Site, Tapajos National Forest,...

  14. Combtreaceae

    NARCIS (Netherlands)

    Stoffers, A.L.

    1979-01-01

    Trees, shrubs or lianas. Leaves alternate, verticillate, or rarely opposite. Stipules wanting. Inflorescence consisting of terminal, axillary or extra-axillary panicles, racemes or spikes. Flowers actinomorphic or occasionally zygomorphic, hermaphrodite or unisexual. Receptacle tubular, surpassing

  15. Effects of lightning on trees: A predictive model based on in situ electrical resistivity.

    Science.gov (United States)

    Gora, Evan M; Bitzer, Phillip M; Burchfield, Jeffrey C; Schnitzer, Stefan A; Yanoviak, Stephen P

    2017-10-01

    The effects of lightning on trees range from catastrophic death to the absence of observable damage. Such differences may be predictable among tree species, and more generally among plant life history strategies and growth forms. We used field-collected electrical resistivity data in temperate and tropical forests to model how the distribution of power from a lightning discharge varies with tree size and identity, and with the presence of lianas. Estimated heating density (heat generated per volume of tree tissue) and maximum power (maximum rate of heating) from a standardized lightning discharge differed 300% among tree species. Tree size and morphology also were important; the heating density of a hypothetical 10 m tall Alseis blackiana was 49 times greater than for a 30 m tall conspecific, and 127 times greater than for a 30 m tall Dipteryx panamensis . Lianas may protect trees from lightning by conducting electric current; estimated heating and maximum power were reduced by 60% (±7.1%) for trees with one liana and by 87% (±4.0%) for trees with three lianas. This study provides the first quantitative mechanism describing how differences among trees can influence lightning-tree interactions, and how lianas can serve as natural lightning rods for trees.

  16. The evolution of angiosperm lianescence without vessels--climbing mode and wood structure-function in Tasmannia cordata (Winteraceae).

    Science.gov (United States)

    Feild, Taylor S; Chatelet, David S; Balun, Lawong; Schilling, Edward E; Evans, Robert

    2012-01-01

    • The lack of extant lianescent vessel-less seed plants supports a hypothesis that liana evolution requires large-diameter xylem conduits. Here, we demonstrate an unusual example of a lianoid vessel-less angiosperm, Tasmannia cordata (Winteraceae), from New Guinea. • Wood mechanical, hydraulic and structural measurements were used to determine how T. cordata climbs and to test for ecophysiological shifts related to liana evolution vs 13 free-standing congeners. • The tracheid-based wood of T. cordata furnished low hydraulic capacity compared with that of vessel-bearing lianas. In comparison with most nonclimbing relatives, T. cordata possessed lower photosynthetic rates and leaf and stem hydraulic capacities. However, T. cordata exhibited a two- to five-fold greater wood elastic modulus than its relatives. • Tasmannia cordata provides an unusual example of angiosperm liana evolution uncoupled from xylem conduit gigantism, as well as high plasticity and cell type diversity in vascular development. Because T. cordata lacks vessels, our results suggest that a key limitation for a vessel-less liana is that strong and low hydraulically conductive wood is required to meet the mechanical demands of lianescence. © 2011 The Authors. New Phytologist © 2011 New Phytologist Trust.

  17. Distribution of Carbon Uptake Capacity of Plant Functional Groups Across the Canopy Gradient in Old-Growth Tropical Wet Forest in Costa Rica

    Science.gov (United States)

    Oberbauer, S. F.; Cruz, H. O.; Ryan, M. G.; Clark, D. B.; Clark, D. A.; Olivas, P.

    2004-12-01

    Because of the difficulties of accessing leaves within tree crowns, little is known about the photosynthetic capacity of different functional groups within tropical rain forest canopies. To address this deficiency, we measured photosynthetic capacity (Amax) in situ along vertical transects through old-growth forest canopy using a mobile walkup tower at the La Selva Biological Station in Costa Rica. We asked: What groups are responsible for most C-fixation and at what height in the canopy does most C-fixation occur? Photosynthesis (using a LI-COR Li-6400) and total leaf area were measured for all vascular plant species encountered within the tower footprint (4.6 m2). Plants were grouped into trees, palms, ferns, lianas, epiphytes, herbs, Pentaclethra macroloba (the dominant canopy tree), and vines. Amax values differed among functional groups. The ranking of Amax among the groups was trees > P. macroloba > palms > lianas > vines > epiphytes > herbs > ferns. Trees and P. macroloba had the highest photosynthetic rates, but the maximum rates occur at different heights. Amax of P. macroloba increases with canopy height to a maximum 10.3 \\mumol m-2 s-1 at 17.5 m. Amax of trees increases with canopy height (r2 = 0.77) and attains the highest Amax at 32.5 m (10.6 \\mumol m-2 s-1). Palms and lianas presented similar patterns of Amax. However, lianas reach the canopy top whereas palms are shorter and were not observed above 27.5 m. The maximum photosynthetic rates for both groups were: lianas 9.2 \\mumol m-2 s-1 at 27.5 m and palms 9.6 \\mumol m-2 s-1 at 17.5 m. By scaling the functional group Amax values with their leaf area, we estimated that most of the photosynthetic capacity occurs between 17.5 m and 37.5 m and is attributed mainly to trees, followed by P. macroloba and then lianas.

  18. Fulltext PDF

    Indian Academy of Sciences (India)

    Unknown

    that the biomass of woody climbing plants (lianas) increased over the last two decades (Phillips et al. 2002). They enhance ... It has been shown that dark green forest canopies reflect much less solar radiation than most other ... up CO2. Reforestation in light green tropical grasslands (e.g. Patanas) could also have a similar.

  19. Download this PDF file

    African Journals Online (AJOL)

    Conclusion: This study showed initial evidence of the use of plant materials by Togolese TH to heal asthma. These ..... kernel, latex and inflorescence followed the same trend and were less used for the healing of asthma. Liana. Herbs. Tree ..... alveolar lavage and eosinophil peroxidase in lungs by treatment. (Oliveira et al.

  20. Icacinaceae

    NARCIS (Netherlands)

    Sleumer, H.

    1972-01-01

    Trees, or whether or not climbing shrubs, or lianas. Leaves spirally arranged, rarely opposite, simple, entire or lobed (in Mal. never crenate or serrate), pennior palmatinerved, exstipulate. Inflorescences mostly axillary, sometimes terminal, rarely extra-axillary, or from old wood, in spikes or

  1. Passifloraceae

    NARCIS (Netherlands)

    Wilde, de W.J.J.O.

    1972-01-01

    Mostly climbing herbs or lianas with axillary tendrils, rarely erect herbs, shrubs or small trees, glabrous or hairy, in Mal. not spiny. Branching usually by a supraaxillary serial bud. Leaves (mostly) spirally arranged, simple or compound, pinninerved or palminerved, entire or lobed; petiole or

  2. Feed resources management of smallholder sheep and goat ...

    African Journals Online (AJOL)

    Materials fed to sheep and goats included cut forage such as grasses, weeds, herbs, forbs, trees and shrubs, lianas, crop residues, kitchen and local food processing wastes. Cut forage was fed to goats and sheep by 84.3 and 32.3% of the farmers irrespective of season. Kitchen waste was the commonest type of ...

  3. ORF Alignment: NC_003074 [GENIUS II[Archive

    Lifescience Database Archive (English)

    Full Text Available opsis thaliana] dbj|BAC41793.1| putative ... fertilization-independent endosperm protein [Arabidopsis... ... thaliana] gb|AAD23584.1| fertilization-independent ... endosperm protein [Arabidopsis tha...liana] ... ref|NP_188710.1| fertilization-independent endosperm ...

  4. Author Details

    African Journals Online (AJOL)

    Steenkamp, Liana. Vol 23, No 4 (2017): Supplement 1 - Articles Anthelmintic drug dispensing in South Africa: An analysis of community pharmacy dispensing data. Abstract · Vol 23, No 4 (2017): Supplement 1 - Articles Recording of nonverbal communication during focus group discussions in health research. Abstract.

  5. Unigene BLAST: CBRC-ATHA-05-0034 [SEVENS

    Lifescience Database Archive (English)

    Full Text Available CBRC-ATHA-05-0034 gnl|UG|At#S11736431 Arabidopsis thaliana ATMPK19 (Arabidopsis tha...liana MAP kinase 19); MAP kinase (ATMPK19) mRNA, complete cds /cds=p(1,1761) /gb=NM_112333 /gi=30683276 /ug=At.8069 /len=1897 6.9 42% ...

  6. Naphthalene, an insect repellent, is produced by Muscodor vitigenus, a novel endophytic fungus

    Science.gov (United States)

    Bryn H. Daisy; Gary A. Strobel; Uvidelio Castillo; David Ezra; Joe Sears; David K. Weaver; Justin B. Runyon

    2002-01-01

    Muscodor vitigenus is a recently described endophytic fungus of Paullinia paullinioides, a liana growing in the understorey of the rainforests of the Peruvian Amazon. This fungus produces naphthalene under certain cultural conditions. Naphthalene produced by M. vitigenus was identified by gas chromatography/mass...

  7. Forest climbing plants of West Africa: diversity, ecology and management

    NARCIS (Netherlands)

    Bongers, F.J.J.M.; Parren, M.P.E.; Traoré, D.

    2005-01-01

    Climbing plants, including lianas, represent a fascinating component of the ecology of tropical forests. This book focuses on the climbing plants of West African forests. Based on original research, it presents information on the flora (including a checklist), diversity (with overviews at several

  8. Biodiversity and human activities in the Udzungwa Mountain forests ...

    African Journals Online (AJOL)

    An ethnobotanical survey was conducted between March and September 1997 in the northwestern and southern parts of the Uzungwa Scarp Forest Reserve using strip transects. Altogether 489 plant species from 107 families were recorded, most of them trees (37 %) and shrubs (27 %). Others were lianas, herbs, ferns and ...

  9. Polygalaceae

    NARCIS (Netherlands)

    Meijden, van der R.

    1984-01-01

    Herbs (sometimes saprophytic), shrubs, lianas or trees. Stipules absent but stem sometimes provided with a pair of glands at the nodes. Leaves simple, entire, usually spirally arranged, sometimes alternate, (semi)decussate or verticillate, sometimes scale-like or absent. Inflorescence usually

  10. Bignoniaceae

    NARCIS (Netherlands)

    Steenis, van C.G.G.J.

    1974-01-01

    Trees, shrubs, lianas, very rarely herbaceous (extra-Mal.); twigs often lenticellate and nodes with gland fields; spines very rare (extra-Mal.). Stipules absent. Leaves simple or mostly compound (digitate or impari-1-4-pinnate), (in Mal.) decussate, rarely in whorls of 3-4, often provided with

  11. [Effects of topography on the diversity and distribution pattern of ground plants in karst montane forests in Southwest Guangxi, China].

    Science.gov (United States)

    Yuan, Tie-Xiang; Zhang, He-Ping; Ou, Zhi-Yang; Tan, Yi-Bo

    2014-10-01

    Covariance analysis, curve-fitting, and canonical correspondence analysis (CCA) were used to explore the effects of topographic factors on the plant diversity and distribution patterns of ground flora with different growth forms in the karst mountains of Southwest Guangxi, China. A total of 152 ground plants were recorded. Among them, 37 species were ferns, 44 species herbs, 9 species lianas, and 62 species shrubs. Covariance analysis revealed that altitude significantly correlated with the individual number and richness of ground plants, and slope aspect had a significant effect on richness. Statistical analyses showed a highly significant nonlinear correlation between the individual number or richness of ground plants and altitude. Results of CCA revealed that slope aspect had a significant effect on the distribution pattern of ferns, and slope had a significant effect on the distribution patterns of herbs, lianas and shrubs. Ferns were more sensitive than herbs, lianas and shrubs to changes in heat and soil water caused by aspect. The effect of slope was stronger than that of elevation on soil water and nutrients, and it was the most important topographic factor that affected the distribution patterns of herbs, lianas and shrubs in this region.

  12. Thymelaeaceae

    NARCIS (Netherlands)

    Hou, Ding

    1960-01-01

    Shrubs, trees, or lianas, rarely undershrubs or herbs, with a very strongly developed and layered, fibrous, tough bast (“Seidenbast”, silky fibres). Leaves opposite or decussate, spiral or alternate, very rarely some ternate, simple, entire, exstipulate, articulated at the base, glandular-punctate

  13. The evolution of development of vascular cambia and secondary growth

    Science.gov (United States)

    Andrew Groover; Rachel Spicer

    2010-01-01

    Secondary growth from vascular cambia results in radial, woody growth of stems. The innovation of secondary vascular development during plant evolution allowed the production of novel plant forms ranging from massive forest trees to flexible, woody lianas. We present examples of the extensive phylogenetic variation in secondary vascular growth and discuss current...

  14. Micropropagation and acclimatization of Bauhinia cheilantha (an ...

    African Journals Online (AJOL)

    user

    2011-02-21

    Feb 21, 2011 ... liana (Bauhinia vahlii Wight & Arnott). Plant Cell Rep. 18: 664-669. Durkovic J, Lux A (2010). Micropropagation with a novel pattern of adventitious rooting in American sweetgum (Liquidambar styraciflua. L.). Trees, 24(3): 491-497. Feng C-M, Qu R, Zhou L-L, Xie D-Y, Xiang Q-Y (2009). Shoot regeneration ...

  15. 75 FR 65706 - Notice of Final Federal Agency Actions on Proposed Highway in Washington State

    Science.gov (United States)

    2010-10-26

    ... actions taken by the FHWA and other Federal agencies that are final within the meaning of 23 U.S.C. 139(l... notice, the FHWA is advising the public of final agency actions subject to 23 U.S.C. 139(l)(1). A claim... still applies. FOR FURTHER INFORMATION CONTACT: For FHWA: Ms. Liana Liu, Area Engineer, Federal Highway...

  16. 78 FR 26417 - Notice of Final Federal Agency Actions on Transportation Project in Washington State

    Science.gov (United States)

    2013-05-06

    ... the meaning of 23 U.S.C. 139(l)(1). The actions relate to the Interstate 90 (I-90) Snoqualmie Pass... to 23 U.S.C. 139(l)(1). A claim seeking judicial review of the Federal agency actions on the listed... claim, then that shorter time period still applies. FOR FURTHER INFORMATION CONTACT: Liana Liu, Area...

  17. Notes on New World Salacioideae (Celastraceae incl. Hippocrateaceae). I. New species of Salacia

    NARCIS (Netherlands)

    Mennega, A.M.W.

    1983-01-01

    Three new species of Salacia are described. Salacia bullata spec. nov., a liana, characterized by bullate leaves, was collected in Brazil, Territorio Amapa. It comes closest to S. amplectens. A.C. Smith’s key (1940) should be amended to include a new group ‘Amplectentes’. This group, containing S.

  18. Prima Vistale tuleb tuntud kirjanikke mitmest Euroopa riigist / Kaarel Kressa

    Index Scriptorium Estoniae

    Kressa, Kaarel, 1983-

    2010-01-01

    Prima Vista kirjandusfestivali külalisi: Leonie Swann, Attila Bartis, Dmitri Bõkov, Zinaida Lindén, Mihhail Šiškin, Fay Weldon, Jason Goodwin, Rosa Maria Rodríguez Magda, Inga Gaile, Juris Kronbergs, Guntars Godinš, Liana Langa

  19. Anatomia do lenho de Uncaria guianensis e U. tomentosa (Rubiaceae do estado do Acre, Brasil Wood anatomy of Uncaria guianensis e U. tomentosa (Rubiaceae from the State of Acre, Brazil

    Directory of Open Access Journals (Sweden)

    Percy A. Zevallos Pollito

    2006-01-01

    Full Text Available As plantas de Uncaria guianensis e U. tomentosa são lianas trepadeiras, arbustos trepadores ou rasteiros ascendentes que ocorrem em amplas áreas da Amazônia brasileira e países da América Central e do Sul. Possuem excepcional importância medicinal, com sua casca, lenho e folhas utilizadas pelos povos amazônicos e pela indústria farmacêutica. Face a necessidade da identificação das plantas em condições de campo e de laboratório, o presente trabalho descreveu a estrutura anatômica do lenho de Uncaria guianensis e U. tomentosa, ocorrentes no Estado do Acre, Brasil. Os resultados mostraram que o lenho das espécies é característico da família Rubiaceae, a exceção dos vasos arredondados, grandes e solitários, parenquima axial difuso e largura dos raios que são próprios das lianas.Uncaria guianensis and U. tomentosa are climbing lianas, bush lianas occuring in large areas of Brazilian Amazon and Central and South America countries. The species presented exceptional medicinal importance, with its bark, wood and leaves used by Amazon native people and pharmaceutical industries. Considering the importance of the species identification in field and laboratory conditions, the present work described the anatomical structure of Uncaria guianensis and U. tomentosa, which occurs in State of Acre, Brazil. The results showed that the wood of the species was characteristic of the Rubiaceae family, except the rounded vessel, greater and solitary, parenchyma axial diffuse and width of the rays, proper of lianas.

  20. STRUKTUR, KERAGAMAN DAN ASOSIASI KOMUNITAS TUMBUHAN PEMANJAT DENGAN POPULASI ALAM MERBAU DI TAMAN WISATA ALAM GUNUNG MEJA MANOKWARI-PAPUA BARAT (Structure, Diversity and Association of Climbing Plants Communities with Merbau Population in Gunung Meja

    Directory of Open Access Journals (Sweden)

    Elieser Viktor Sirami

    2016-02-01

    Full Text Available ABSTRAK Struktur, keragaman dan asosiasi komunitas tumbuhan pemanjat dengan pohon inang di hutan tropis sangat ditentukan oleh banyak faktor biofisik habitat yang saling timbal balik hubungannya. Penelitian ini bertujuan untuk mengetahui struktur, keragaman dan derajat asosiasi antara tumbuhan pemanjat dengan tegakan alam merbau di TWA Gunung Meja Manokwari, Papua Barat. Hasil penelitian menunjukkan bahwa liana di bawah tegakan merbau memiliki keragaman sedang, terdiri dari 67 jenis, 52 genera dan 32 famili liana, liana berkayu 33 jenis, 29 genera dan 22 famili dan liana tak berkayu 35 jenis, 27 genera dan 19 famili. Jenis dominan adalah Pothos rumphii, dominansi sedang Philodendron sp. dan 65 jenis yang lain kurang dominan. Sebanyak 33 jenis berasosiasi sangat kuat dengan tegakan merbau, 28 jenis asosiasinya kuat dan 6 jenis asosiasinya kurang kuat. Faktor lingkungan yang berperan terhadap strukur dan keragaman serta asosiasi adalah struktur vertikal dan struktur horizontal tegakan, naungan hutan, diameter, tinggi, tekstur batang dan lebar tajuk pohon merbau dan jenis pohon yang lain.    ABSTRACT Reciprocal relationship among biophysical factors of habitat influence the structure, diversity and assocition levels of climbing plants with host tree in the tropical forest. The aims of this study were to know structure, diversity and assocition levels of liana and merbau population in Gunung Meja natural tourism park of Manokwari, West Papua. There were 67 species, 52 genera and 32 families of climbing plants under the merbau stands. It consists of 33 species of lianas, 29 genera, 22 families, 35 species of vines, 27 genera and 19 families and they have medium diversity levels. Pothos rumphii is the most dominant species, Philodendron sp. is medium dominant and 65 species are minimum dominant. 33 species have strong association with merbau stands, 28 species has less strong and 6 were not strong. Habitat factors that plays an important roll in the

  1. Encroachment of oriental bittersweet into Pitcher’s thistle habitat

    Science.gov (United States)

    Leicht-Young, Stacey A.; Pavlovic, Noel B.

    2012-01-01

    Common invasive species and rare endemic species can grow and interact at the ecotone between forested and non-forested dune habitats. To investigate these interactions, a comparison of the proximity and community associates of a sympatric invasive (Celastrus orbiculatus; oriental bittersweet) and native (C. scandens; American bittersweet) liana species to federally threatened Cirsium pitcheri (Pitcher's thistle) in the dunes habitats of Lake Michigan was conducted. Overall, the density of the invasive liana species was significantly greater in proximity to C. pitcheri than the native species. On the basis of composition, the three focal species occurred in both foredune and blowout habitats. The plant communities associated with the three focal species overlapped in ordination space, but there were significant differences in composition. The ability of C. orbiculatus to rapidly grow and change the ecological dynamics of invasion sites adds an additional threat to the successional habitats of C. pitcheri.

  2. Climber Diversity across Vegetational Landscape of North-Eastern Uttar Pradesh, India

    Directory of Open Access Journals (Sweden)

    Ashish DVIVEDI

    2016-12-01

    Full Text Available The composition and diversity of climbers among grassland, wasteland and forest vegetations was examined with respect to their woodiness, climbing mode and circumnutation pattern across the vegetational landscape of north-eastern Uttar Pradesh during 2011-2015. A total of 111 climbers, constituting 63 lianas and 48 vine species, under 35 families, were recorded. The forest and wasteland vegetation were quite similar in regard with climber diversity. Family Convolvulaceae included a maximum of 19 climbers. Majority of twining climbers showed right-handed twining.  The wasteland vegetation was most suitable and quite similar to forest habitat for vines as well as for lianas. The right handed circumnutation was the dominant pattern among the twiners of the region. Local climbing flora provides considerable natural resource to the region. They often create special micro-habitats and increase the complexity of the ecosystem.

  3. Atividade anti-helmíntica de plantas em frangos de corte naturalmente infectados com Ascaridia galli Anthelminthic activity of plants in broiler chickens naturally infected with Ascaridia galli

    Directory of Open Access Journals (Sweden)

    R.M. Fernandes

    2005-09-01

    Full Text Available The anthelminthic activity of four plants - Allium sativum (garlic, Punica granatum (pomegranate, Tynnanthus labiatus (liana-carnation and Cocus nucifera (coconut with the activity of mebendazole - was compared. Seventy Hubbard chickens, naturally infected with Ascarídia galli, divided in 5 groups of 10 chichens plus a control group (not treated, n=20 were used in the experiment. The vegetable matter was used in the forms of aqueous extract, juice and triturated, administered by probe or incorporated to the diet, in the doses of 2, 3 and 10g/kg/day, for three days. A non parametric test was used to evaluate the anthelminthic effect of the plants. The eliminations of A. galli for the garlic, pomegranate, liana-carnation, coconut and mebendazole were: 9.7; 6.6, 16.7; 19.0 and 99.0%, respectively. The results showed that those plants do not have anthelminthic activity.

  4. Hippocrateaceae endémicas del Perú

    Directory of Open Access Journals (Sweden)

    Blanca León

    2013-10-01

    Full Text Available The Hippocrateaceae are represented in Peru by nine genera and 52 species (Brako & Zarucchi, 1993; Ulloa Ulloa et al., 2004, mostly lianas. Here we recognize three endemic species in the same number of genera. These endemic species are found in the Humid Lowland Amazonian Forests region, between 100 and 135 m elevation. We applied IUCN categories and criteria to two species. No endemic Hippocrateaceae have been registered to date in Peru’s protected areas system.

  5. По зимнему бездорожью на полном приводе / Велиматти Хонканен, Яри Питкаярви и Ярмо Сукава

    Index Scriptorium Estoniae

    Хонканен, Велиматти

    2003-01-01

    Audi A4 1,8 T Quattro, BMW 325Xi, Honda HR-V 1,6i, Jaguar X-Type 3,0 V6, Mercedes-Benz E 320 4matic, Renault Scenic RX4 2,0, Škoda Octavia Combi 2,0WD, Subaru Impreza 2,0 GX, Suzuki Liana 1,6 4WD, Volvo S60 AWD

  6. Trafficking in Persons: U.S. Policy and Issues for Congress

    Science.gov (United States)

    2010-08-04

    smuggling, irregular migration, and the movement of asylum seekers . In 2000, the United Nations drafted two protocols, known as the Palermo Protocols...the Border: Immigrants in Detention and Victims of Trafficking, Part II, 110th Cong., 1 sess., March 20, 2007. 128 Personal communication with ICE...Liana Sun Wyler Analyst in International Crime and Narcotics Alison Siskin Specialist in Immigration Policy August 4, 2010 Congressional Research

  7. Cynanchum mooreanum Hemsl. (Asclepiadaceae, a New Recorded Species in Taiwan

    Directory of Open Access Journals (Sweden)

    Chien-Ti Chao

    2010-09-01

    Full Text Available Cynanchum mooreanum Hemsl. is a perennial liana of Asclepiadaceae. Based on literature study this species is endemic to Mainland China. Recently, we found a new distribution record of this species in central Taiwan. It grows in open and dry grasslands. In this article we provide description, photos, distribution map, key and line drawing. This is a new recorded species to the flora of Taiwan.

  8. Seed cleaning of Strychnos ramentifera (Loganiaceae) by ants inMaracá island, Brazilian Amazonia.

    OpenAIRE

    Antonio Rossano Mendes Pontes

    2005-01-01

    Thousands of plant species rely on ants to disperse their seeds, including many South American epiphytes and vines, which, apart from minimizing competition among seedlings, may also reduce competition among different plant species (Handel & Beattie, 1990). The lianas of the Genus Strychnos (Loganiaceae) are recognized as having fruits with highly poisonous seeds containing strychnine in the integuments, which are, nevertheless, dispersed endozoochorously by highly-specialized frugivores (i.e...

  9. Merida Initiative: Insight Into U.S. Mexico Relations

    Science.gov (United States)

    2016-09-01

    accomplishment. I would like to thank my parents for their love and support in all of life’s endeavors and encouraging me to pursue a military...accessed May 7, 2016, https://www.stratfor.com/sites/default/files/ styles /stratforfull/public/main/images/ mexico_cartels_v7_1.jpg?itok=oPd1GY7E. 31...countries like Pakistan , Afghanistan, 128 Ibid., 171–172. 129 Liana Sun Wyler, Weak and Failing

  10. AcEST: DK959444 [AcEST

    Lifescience Database Archive (English)

    Full Text Available liana GN=ycf... 31 3.1 sp|A4QKZ7|YCF2B_CRUWA Protein ycf2 B OS=Crucihimalaya wallichii ... 31 3.1 sp|A4QKX4|...YCF2A_CRUWA Protein ycf2 A OS=Crucihimalaya wallichii ... 31 3.1 sp|Q9CS72|FLIP1_MOUSE Filamin-A-interacting

  11. Remnant Trees in Enrichment Planted Gaps in Quintana Roo, Mexico: Reasons for Retention and Effects on Seedlings

    Directory of Open Access Journals (Sweden)

    Angélica Navarro-Martínez

    2017-07-01

    Full Text Available Natural forest management in the tropics is often impeded by scarcity of advanced regeneration of commercial species. To supplement natural regeneration in a forest managed by a community in the Selva Maya of Mexico, nursery-grown Swietenia macrophylla seedlings were planted in multiple-tree felling gaps, known as bosquetes. Remnant trees are often left standing in gaps for cultural and economic reasons or due to their official protected status. We focus on these purposefully retained trees and their impacts on planted seedlings. Sampled bosquetes were 400–1800 m2, of which remnant trees covered a mean of 29%. Seedling height growth rates over the first 18 months after out-planting more than doubled with increased canopy openness from 0.09 m year−1 under medium cover to 0.22 m year−1 in full sun. Liana infestations and shoot tip damage were most frequent on seedlings in the open, but, contrary to our expectations, height growth rates were 0.14 m year−1 faster for liana-infested seedlings than non-infested and did not differ between damaged and undamaged seedlings. Apparently the more rapid height growth of well-illuminated seedlings more than compensated for the effects of lianas or shoot tip damage. Despite the abundance of remnant trees and their negative effects on seedling growth, enrichment planting in bosquetes has potential for community-based natural forest management in the tropics in supplementing natural regeneration of commercial species. One obvious recommendation is to leave fewer remnant trees, especially those of commercial species that are non-merchantable due to stem defects and trees retained for no apparent reason, which together constituted half of the remnant crown cover in the sampled bosquetes. Finally, given the rapid growth of lianas and understory palms in large canopy gaps, at least the most vigorous of the planted seedlings should be tended for at least two years.

  12. El cuento americano: Güeno-mapu

    Directory of Open Access Journals (Sweden)

    Gabriel Carvajal

    1966-02-01

    Full Text Available Helechos. Susurran como el abanico del pavo real. Ahí están. En grupos o hileras sobre la huella rojiza que va al caserío. Junto a la selva. Lejos, adentro, a donde solo llegan a ramonear los vahuales. En la traba de pellines, ulmos y araucarias, rosal silvestre y zarza levantada en altura de lianas y cañaveral.

  13. Evaluation of gastroprotective activity of Passiflora alata

    OpenAIRE

    Wasicky, André; Hernandes, Leandro S.; Vetore-Neto, Alberto; Moreno, Paulo R.H.; Bacchi, Elfriede Marianne; Kato, Edna Tomiko Myiake; Yoshida, Massayoshi

    2015-01-01

    AbstractPassiflora alata Curtis, Passifloraceae, is a liana popularly known in Brazil as ‘maracujá-doce’ that has been used for treating different illnesses. Its leaves are described in the Brazilian Pharmacopoeia, but the gastroprotective activity has never been investigated. In the present study a freeze-dried crude 60% ethanol–water extract of P. alata aerial parts was prepared. Total flavonoid content, expressed as vitexin, was 0.67% ± 0.01. The hemolytic activity was 32...

  14. Response to water deficit of Ipomoea cairica (L.) Sweet Resposta de Ipomoea cairica (L.) Sweet à deficiência hídrica

    OpenAIRE

    Grasiela Bruzamarello Tognon; Cláudia Petry; Francine Lorena Cuquel

    2012-01-01

    Green spaces require frequent watering, increasing the pressure on water resources. The use of native plants in landscaping reduces the risks of biological contamination, contributing to preservation of Brazilian biodiversity and provides the value of sustainability in urban green areas. Of these native plants, a restricted number are native lianas which are adapted to Brazilian climate and available on the market. In this regard, the selection and recommending of native plants which are effi...

  15. Beta-lactam Resistance and Novel Therapeutics for Staphylococcus aureus

    OpenAIRE

    Chan, Liana

    2014-01-01

    Abstractβ-Lactam Resistance and Novel Therapeutics for Staphylococcus aureus byLiana Celene ChanDoctor of Philosophy in Infectious Diseases & ImmunityUniversity of California, BerkeleyProfessor George Sensabaugh, Chair Staphylococcus aureus is an important human pathogen capable of causing disease in otherwise healthy individuals. It causes mostly skin and soft tissue infections but can cause more invasive diseases. Treatment for S. aureus has become a problem due to increasing resistanc...

  16. The genus Machaerium (Fabaceae): taxonomy, phytochemistry, traditional uses and biological activities.

    Science.gov (United States)

    Amen, Yhiya M; Marzouk, Amani M; Zaghloul, Mona G; Afifi, Mohamed S

    2015-01-01

    Machaerium, in the family Fabaceae, predominantly is a genus of a Neotropical distribution of trees, shrubs, and lianas occurring from southern Mexico to Brazil and northern Argentina and as far as South America. Several Machaerium species are widely used in traditional medicine and are considered to have multiple medicinal properties. This review aims to provide up-to-date and comprehensive information on the taxonomy, phytochemistry, traditional uses and biological activities of plants in the genus Machaerium.

  17. Able-bodied wild chimpanzees imitate a motor procedure used by a disabled individual to overcome handicap.

    Directory of Open Access Journals (Sweden)

    Catherine Hobaiter

    2010-08-01

    Full Text Available Chimpanzee culture has generated intense recent interest, fueled by the technical complexity of chimpanzee tool-using traditions; yet it is seriously doubted whether chimpanzees are able to learn motor procedures by imitation under natural conditions. Here we take advantage of an unusual chimpanzee population as a 'natural experiment' to identify evidence for imitative learning of this kind in wild chimpanzees. The Sonso chimpanzee community has suffered from high levels of snare injury and now has several manually disabled members. Adult male Tinka, with near-total paralysis of both hands, compensates inability to scratch his back manually by employing a distinctive technique of holding a growing liana taut while making side-to-side body movements against it. We found that seven able-bodied young chimpanzees also used this 'liana-scratch' technique, although they had no need to. The distribution of the liana-scratch technique was statistically associated with individuals' range overlap with Tinka and the extent of time they spent in parties with him, confirming that the technique is acquired by social learning. The motivation for able-bodied chimpanzees copying his variant is unknown, but the fact that they do is evidence that the imitative learning of motor procedures from others is a natural trait of wild chimpanzees.

  18. Able-bodied wild chimpanzees imitate a motor procedure used by a disabled individual to overcome handicap.

    Science.gov (United States)

    Hobaiter, Catherine; Byrne, Richard W

    2010-08-05

    Chimpanzee culture has generated intense recent interest, fueled by the technical complexity of chimpanzee tool-using traditions; yet it is seriously doubted whether chimpanzees are able to learn motor procedures by imitation under natural conditions. Here we take advantage of an unusual chimpanzee population as a 'natural experiment' to identify evidence for imitative learning of this kind in wild chimpanzees. The Sonso chimpanzee community has suffered from high levels of snare injury and now has several manually disabled members. Adult male Tinka, with near-total paralysis of both hands, compensates inability to scratch his back manually by employing a distinctive technique of holding a growing liana taut while making side-to-side body movements against it. We found that seven able-bodied young chimpanzees also used this 'liana-scratch' technique, although they had no need to. The distribution of the liana-scratch technique was statistically associated with individuals' range overlap with Tinka and the extent of time they spent in parties with him, confirming that the technique is acquired by social learning. The motivation for able-bodied chimpanzees copying his variant is unknown, but the fact that they do is evidence that the imitative learning of motor procedures from others is a natural trait of wild chimpanzees.

  19. Acclimation of seedlings of Gnetum leyboldii Tul. Gnetaceae to light changes in a tropical rain forest

    Directory of Open Access Journals (Sweden)

    Gerardo Celis

    2013-12-01

    Full Text Available The neotropical liana Gnetum leyboldii Gnetaceae is a gymnosperm that resembles angiosperms in wood anatomy, overall morphology, and seed dispersal mechanism. Like other woody lianas, seedlings germinate in the shaded forest understory and start climbing towards the canopy, being eposed to sites with etreme differences in light conditions. However, the etent of physiological and structural adjustment to contrasting light conditions in the early regeneration stages of Gnetum is unknown. To answer this question, we analyzed seedling growth and photosynthetic responses using a common garden eperiment with two light regimes: full sun and low light 20 of full sun at La Selva Biological Station, Costa Rica. We also characterized the germination pattern of this species. We monitored one and half-month old seedlings for four months. Leaf structure finely adapted to light treatments, but gas echange properties were buffered by large seed reserves, which dominated biomass distribution about 50 of the total biomass, followed by stem 27, leaf 16 and root biomass 6 across light conditions. The presence of large seeds and the low photosynthetic rates of seedlings in both environments show that G. leyboldii is specialized to eploit deep shade. More research is needed to determine if the patterns found in G. leyboldii are typical of similar lianas that initially eploit deep-shaded understories in their ascension to the canopy.

  20. CTI capacity building seminar for CEE/FSU countries. Climate technology and energy efficiency. Challenges and changes for climate technology. Seminar proceedings

    Energy Technology Data Exchange (ETDEWEB)

    Tempel, Sybille; Moench, Harald (eds.); Mez, Lutz; Krug, Michael (comps.) [Free Univ. Berlin (DE). Environmental Policy Research Centre (FFU)

    2005-01-15

    use of energy (Peter Loeffler); (24) The interaction between the EU CHP Directive and the New Danish Regulation (Ture Hammar); (25) The future of CHP in Russia (Igor Bashmakov); (26) The CHP competence centres in the Slovak Republic: Developed strategies and work program (Vladimir Hecl); (26) Discussant Notes: Session building renovation and employment effects (Mihael Tomsic); (27) Initiative for climate protection and job creation in Berlin-Brandenburg (Lutz Mez); (28) Analysis of building renovation projects in Latvia: Energy, climate and socioeconomic aspect (Dagnija Blumberga); (29) Employment effects of building renovation projects (Adam Gula); (30) Developing and implementing a uniform German certificate for buildings (Felicitas Kraus); (31) Discussant notes: Session building renovation and employment effects (Valia Peeva).

  1. Large-scale carbon stock assessment of woody vegetation in tropical dry deciduous forest of Sathanur reserve forest, Eastern Ghats, India.

    Science.gov (United States)

    Gandhi, Durai Sanjay; Sundarapandian, Somaiah

    2017-04-01

    Tropical dry forests are one of the most widely distributed ecosystems in tropics, which remain neglected in research, especially in the Eastern Ghats. Therefore, the present study was aimed to quantify the carbon storage in woody vegetation (trees and lianas) on large scale (30, 1 ha plots) in the dry deciduous forest of Sathanur reserve forest of Eastern Ghats. Biomass of adult (≥10 cm DBH) trees was estimated by species-specific allometric equations using diameter and wood density of species whereas in juvenile tree population and lianas, their respective general allometric equations were used to estimate the biomass. The fractional value 0.4453 was used to convert dry biomass into carbon in woody vegetation of tropical dry forest. The mean aboveground biomass value of juvenile tree population was 1.86 Mg/ha. The aboveground biomass of adult trees ranged from 64.81 to 624.96 Mg/ha with a mean of 245.90 Mg/ha. The mean aboveground biomass value of lianas was 7.98 Mg/ha. The total biomass of woody vegetation (adult trees + juvenile population of trees + lianas) ranged from 85.02 to 723.46 Mg/ha, with a mean value of 295.04 Mg/ha. Total carbon accumulated in woody vegetation in tropical dry deciduous forest ranged from 37.86 to 322.16 Mg/ha with a mean value of 131.38 Mg/ha. Adult trees accumulated 94.81% of woody biomass carbon followed by lianas (3.99%) and juvenile population of trees (1.20%). Albizia amara has the greatest biomass and carbon stock (58.31%) among trees except for two plots (24 and 25) where Chloroxylon swietenia contributed more to biomass and carbon stock. Similarly, Albizia amara (52.4%) showed greater carbon storage in juvenile population of trees followed by Chloroxylon swietenia (21.9%). Pterolobium hexapetalum (38.86%) showed a greater accumulation of carbon in liana species followed by Combretum albidum (33.04%). Even though, all the study plots are located within 10 km radius, they show a significant spatial variation among

  2. Microhabitat of small mammals at ground and understorey levels in a deciduous, southern Atlantic Forest

    Directory of Open Access Journals (Sweden)

    GERUZA L. MELO

    2013-06-01

    Full Text Available Each animal species selects specific microhabitats for protection, foraging, or micro-climate. To understand the distribution patterns of small mammals on the ground and in the understorey, we investigated the use of microhabitats by small mammals in a deciduous forest of southern Brazil. Ten trap stations with seven capture points were used to sample the following microhabitats: liana, fallen log, ground litter, terrestrial ferns, simple-trunk tree, forked tree, and Piper sp. shrubs. Seven field phases were conducted, each for eight consecutive days, from September 2006 through January 2008. Four species of rodents (Akodon montensis, Sooretamys angouya, Oligoryzomys nigripes and Mus musculus and two species of marsupials (Didelphis albiventris and Gracilinanus microtarsus were captured. Captured species presented significant differences on their microhabitat use (ANOVA, p = 0.003, particularly between ground and understorey sites. Akodon montensis selected positively terrestrial ferns and trunks, S. angouya selected lianas, D. albiventris selected fallen trunks and Piper sp., and G. microtarsus choose tree trunks and lianas. We demonstrated that the local small-mammal assemblage does select microhabitats, with different types of associations between species and habitats. Besides, there is a strong evidence of habitat selection in order to diminish predation.Cada espécie animal pode apresentar seletividade por micro-habitats priorizando proteção, forrageio ou microclima. Para compreender os padrões de distribuição de pequenos mamíferos ao nível do solo e de sub-bosque, nós analisamos o uso de micro-habitat por pequenos mamíferos em uma floresta estacional no sul do Brasil. Dez estações amostrais com sete pontos de captura foram usadas para amostragem dos seguintes microhabitats: liana, tronco caído, solo apenas coberto por folhiço, solo coberto por samambaias, árvore com tronco simples, árvore com bifurcações e arbustos do g

  3. Parameterization of Leaf-Level Gas Exchange for Plant Functional Groups From Amazonian Seasonal Tropical Rain Forest

    Science.gov (United States)

    Domingues, T. F.; Berry, J. A.; Ometto, J. P.; Martinelli, L. A.; Ehleringer, J. R.

    2004-12-01

    Plant communities exert strong influence over the magnitude of carbon and water cycling through ecosystems by controlling photosynthetic gas exchange and respiratory processes. Leaf-level gas exchange fluxes result from a combination of physiological properties, such as carboxylation capacity, respiration rates and hydraulic conductivity, interacting with environmental drivers such as water and light availability, leaf-to-air vapor pressure deficit, and temperature. Carbon balance models concerned with ecosystem-scale responses have as a common feature the description of eco-physiological properties of vegetation. Here we focus on the parameterization of ecophysiological gas-exchange properties of plant functional groups from a pristine Amazonian seasonally dry tropical rain forest ecosystem (FLONA-Tapajós, Santarém, PA, Brazil). The parameters were specific leaf weight, leaf nitrogen content, leaf carbon isotope ratio, maximum photosynthetic assimilation rate, photosynthetic carboxylation capacity, dark respiration rates, and stomatal conductance to water vapor. Our plant functional groupings were lianas at the top of the canopy, trees at the top of the canopy, mid-canopy trees and undestory trees. Within the functional groups, we found no evidence that leaves acclimated to seasonal changes in precipitation. However, there were life-form dependent distinctions when a combination of parameters was included. Top-canopy lianas were statistically different from top-canopy trees for leaf carbon isotope ratio, maximum photosynthetic assimilation rate, and stomatal conductance to water vapor, suggesting that lianas are more conservative in the use of water, causing a stomatal limitation on photosynthetic assimilation. Top-canopy, mid canopy and understory groupings were distinct for specific leaf weight, leaf nitrogen content, leaf carbon isotope ratio, maximum photosynthetic assimilation rate, and photosynthetic carboxylation capacity. The recognition that plant

  4. Evolution of development of vascular cambia and secondary growth.

    Science.gov (United States)

    Spicer, Rachel; Groover, Andrew

    2010-05-01

    Secondary growth from vascular cambia results in radial, woody growth of stems. The innovation of secondary vascular development during plant evolution allowed the production of novel plant forms ranging from massive forest trees to flexible, woody lianas. We present examples of the extensive phylogenetic variation in secondary vascular growth and discuss current knowledge of genes that regulate the development of vascular cambia and woody tissues. From these foundations, we propose strategies for genomics-based research in the evolution of development, which is a next logical step in the study of secondary growth.

  5. Anatomia do lenho de Uncaria guianensis e U. tomentosa (Rubiaceae) do estado do Acre, Brasil Wood anatomy of Uncaria guianensis e U. tomentosa (Rubiaceae) from the State of Acre, Brazil

    OpenAIRE

    Percy A. Zevallos Pollito; Mario Tomazello

    2006-01-01

    As plantas de Uncaria guianensis e U. tomentosa são lianas trepadeiras, arbustos trepadores ou rasteiros ascendentes que ocorrem em amplas áreas da Amazônia brasileira e países da América Central e do Sul. Possuem excepcional importância medicinal, com sua casca, lenho e folhas utilizadas pelos povos amazônicos e pela indústria farmacêutica. Face a necessidade da identificação das plantas em condições de campo e de laboratório, o presente trabalho descreveu a estrutura anatômica do lenho de U...

  6. Derechos de los pueblos indígenas en el Ecuador I

    OpenAIRE

    CONAIE; Fundación Centro Lianas; Fundación Selva Viva; Fundación Pachamama; INREDH

    2010-01-01

    Elaborado por la Confederación de Nacionalidades Indígenas del Ecuador (CONAIE), la Fundación Regional de Asesoría en Derechos Humanos INREDH, la Fundación Centro Lianas, la Fundación Pachamama y la Fundación Selva Viva. Presentado ante la Comisión Interamericana de Derechos Humanos. Autoría: Bolívar Beltrán, David Cordero, Pablo Fajardo, Wilton Guaranda, Mario Melo y Marcelo Orellana. Septiembre de 2009. Este informe se basa en la respuesta al Cuestionario para los Estados, puebl...

  7. Ancistrotanzanine C and related 5,1 '- and 7,3 '-coupled naphthylisoquinoline alkaloids from Ancistrocladus tanzaniensis

    DEFF Research Database (Denmark)

    Bringmann, G.; Dreyer, M.; Faber, J.H.

    2004-01-01

    Three new naphthylisoquinoline alkaloids, the 7,3'-coupled ancistrotanzanine C (6), the 5,1'-coupled O-methylancistrocladinine (7), and the likewise 5,1'-coupled O,N-dimethylancistrocladine (8, previously known only as a partial-synthetic compound), have been isolated from the highland liana...... Ancistrocladus tanzaniensis, along with the two known 7,3'-coupled naphthylisoquinoline alkaloids ancistrocladidine (4) and ancistrotectorine (5). All of the compounds are S-configured at C-3 and bear an oxygen at C-6, and thus belong to the so-called Ancistrocladaceae type, similar to 1-3 previously isolated...

  8. Structure on lower montane secondary forests and shrublands in northern Antioquia, Colombia

    Directory of Open Access Journals (Sweden)

    Héctor Iván Restrepo

    2012-12-01

    Full Text Available Tropical montane forests have the highest biodiversity in the world. However, they are being seriously threatened by deforestation, degradation and climate change. Their conservation is also at risk because we know little about their ecology. We established four permanent plots at two successional stages: secondary forest and cultivated areas. Distribution by diameter was analyzed using Hugershoff non-linear models. We estimated biomass of trees above and below-ground along with liana, under bush, understory and epiphyte biomass. In addition we measured necromass of standing dead trees, litter from wood and litterfall. We estimated total carbon in living and dead organic matter and in the soil. All the diametric distributions were of a J-inverted shape. The Hugershoff models successfully explained the behavior of the secondary forest and shrub structure. The biomass, necromass and total carbon were estimated at 185.7 and 29.8 t ha-1, 9.2 and 3.8 t ha-1 and 151.7 and 78.2 t ha-1 respectively for forests and cultivated areas. An interesting finding is the high biomass of trees below-ground, lianas and epiphytes in tropical montane forest. Tropical montane forests provide important environmental services and therefore we have to search for better ways to conserve them.

  9. Different hydraulic traits of woody plants from tropical forests with contrasting soil water availability.

    Science.gov (United States)

    Zhu, Shi-Dan; Chen, Ya-Jun; Fu, Pei-Li; Cao, Kun-Fang

    2017-11-01

    In southwestern China, tropical karst forests (KF) and non-karst rain forests (NKF) have different species composition and forest structure owing to contrasting soil water availability, but with a few species that occur in both forests. Plant hydraulic traits are important for understanding the species' distribution patterns in these two forest types, but related studies are rare. In this study, we investigated hydraulic conductivity, vulnerability to drought-induced cavitation and wood anatomy of 23 abundant and typical woody species from a KF and a neighboring NKF, as well as two Bauhinia liana species common to both forests. We found that the KF species tended to have higher sapwood density, smaller vessel diameter, lower specific hydraulic conductivity (ks) and leaf to sapwood area ratio, and were more resistant to cavitation than NKF species. Across the 23 species distinctly occurring in either KF or NKF, there was a significant tradeoff between hydraulic efficiency and safety, which might be an underlying mechanism for distributions of these species across the two forests. Interestingly, by possessing rather large and long vessels, the two Bauhinia liana species had extremely high ks but were also high resistance to cavitation (escaping hydraulic tradeoff). This might be partially due to their distinctly dimorphic vessels, but contribute to their wide occurrence in both forests. © The Author 2017. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oup.com.

  10. Cuticles of Mariopteris occidentalis White nov. emend. from the Middle Pennsylvanian of Oklahoma (USA), and a new type of climber hook for mariopteroid pteridosperms.

    Science.gov (United States)

    Krings, M; Taylor, T N.; Taylor, E L.; Axsmith, B J.; Kerp, H

    2001-04-01

    Cuticles of Mariopteris occidentalis are described from the Desmoinesian (Middle Pennsylvanian) of Oklahoma (USA). This species, like other mariopteroids, had a vine- to liana-like growth habit and climbed with specialized climber hooks. However, M. occidentalis is different from other mariopteroids in having small recurved hooks on the abaxial surfaces of the pinna axes. The diagnosis for M. occidentalis White 1899 is emended based on additional macroscopical observations and data on the epidermal anatomy; a lectotype is designated. M. occidentalis is compared with Pseudomariopteris cordato-ovata from the Stephanian and Autunian of Europe and North America, a taxon which is considered very similar and may be related. Although the two taxa indeed display similarities, significant evidence for a closer relationship could not be found. Finally, some features, e.g. marginal water pits and the stomatal structure, are considered with regard to their palaeoautecological significance where they are interpreted as adaptations to special physiological requirements of a vine- to liana-like life form.

  11. Flowering phenology, growth forms, and pollination syndromes in tropical dry forest species: Influence of phylogeny and abiotic factors.

    Science.gov (United States)

    Cortés-Flores, Jorge; Hernández-Esquivel, Karen Beatriz; González-Rodríguez, Antonio; Ibarra-Manríquez, Guillermo

    2017-01-01

    Analyses of the influence of temporal variation in abiotic factors on flowering phenology of tropical dry forest species have not considered the possible response of species with different growth forms and pollination syndromes, while controlling for phylogenetic relationships among species. Here, we investigated the relationship between flowering phenology, abiotic factors, and plant functional attributes, while controlling for phylogenetic relationship among species, in a dry forest community in Mexico. We characterized flowering phenology (time and duration) and pollination syndromes of 55 tree species, 49 herbs, 24 shrubs, 15 lianas, and 11 vines. We tested the influence of pollination syndrome, growth form, and abiotic factors on flowering phenology using phylogenetic generalized least squares. We found a relationship between flowering duration and time. Growth form was related to flowering time, and the pollination syndrome had a more significant relationship with flowering duration. Flowering time variation in the community was explained mainly by abiotic variables, without an important phylogenetic effect. Flowering time in lianas and trees was negatively and positively correlated with daylength, respectively. Functional attributes, environmental cues, and phylogeny interact with each other to shape the diversity of flowering patterns. Phenological differentiation among species groups revealed multiples strategies associated with growth form and pollination syndromes that can be important for understanding species coexistence in this highly diverse plant community. © 2017 Botanical Society of America.

  12. [Features of calcium crystals and calcium components in 54 plant species in salinized habitats of Tianjin].

    Science.gov (United States)

    Xu, Jing-Jing; Ci, Hua-Cong; He, Xing-Dong; Xue, Ping-Ping; Zhao, Xue-Lai; Guo, Jian-Tan; Gao, Yu-Bao

    2012-05-01

    Plant calcium (Ca) is composed of dissociated Ca2+ and easily soluble, slightly soluble, and hard soluble combined Ca salts. The hard soluble Ca salts can often engender Ca crystals. To understand the Ca status in different growth form plants in salinized habitats, 54 plant species were sampled from the salinized habitats in Tianjin, with the Ca crystals examined by microscope and the Ca components determined by sequential fractionation procedure. More Ca crystals were found in 38 of the 54 plant species. In 37 of the 38 plant species, drusy and prismatic Ca oxalate crystals dominated, whereas the cystolith of Ca carbonate crystal only appeared in the leaves of Ficus carica of Moraceae. The statistics according to growth form suggested that deciduous arbors and shrubs had more Ca oxalate crystal, liana had lesser Ca oxalate crystal, and herbs and evergreen arbors had no Ca oxalate crystal. From arbor, shrub, liana to herb, the concentration of HCl-soluble Ca decreased gradually, while that of water soluble Ca was in adverse. The concentration of water soluble Ca in herbs was significantly higher than that in arbors and shrubs. This study showed that in salinized habitats, plant Ca crystals and Ca components differed with plant growth form, and the Ca oxalate in deciduous arbors and shrubs played an important role in withstanding salt stress.

  13. Bonobos apparently search for a lost member injured by a snare.

    Science.gov (United States)

    Tokuyama, Nahoko; Emikey, Besao; Bafike, Batuafe; Isolumbo, Batuafe; Iyokango, Bahanande; Mulavwa, Mbangi N; Furuichi, Takeshi

    2012-07-01

    This is the first report to demonstrate that a large mixed-sex party of bonobos travelled a long distance to return to the location of a snare apparently to search for a member that had been caught in it. An adult male was caught in a metallic snare in a swamp forest at Wamba, Luo Scientific Reserve, Democratic Republic of the Congo. After he escaped from the snare by breaking a sapling to which the snare was attached, other members of his party assisted him by unfastening the snare from lianas in which it was caught and licked his wound and tried to remove the snare from his fingers. In the late afternoon, they left him in the place where he was stuck in the liana and travelled to the dry forest where they usually spend the night. The next morning, they travelled back 1.8 km to revisit the location of the injured male. When they confirmed that he was no longer there, they returned to the dry forest to forage. This was unlike the usual ranging patterns of the party, suggesting that the bonobos travelled with the specific intention of searching for this injured individual who had been left behind. The incident described in this report likely occurred because bonobos usually range in a large mixed-sex party and try to maintain group cohesion as much as possible.

  14. Environmental variables and tree population structures in deciduous forests of central Brazil with different levels of logging

    Directory of Open Access Journals (Sweden)

    Daniel Luis Mascia Vieira

    2008-04-01

    Full Text Available Population structures of six tree species in three fragments of intact seasonal deciduous forest and three fragments disturbed by logging were studied in the northeastern Goiás. Forty random 400 m² plots were allocated in each fragment to survey plant population structures, number of stumps, cattle feces, burnt logs, and canopy openness. Soil cover by life forms was estimated in 1m² sub-plots. Lianas were abundant in intermediately logged fragments and invasive herbs in the most disturbed fragment. Cattle avoided dense herbaceous strata, such as liana tangles. Cavanillesia arborea, Eugenia dysenterica and Swartzia multijuga trees occurred at very low densities in all the fragments and their seedlings were practically absent, which might endanger their future populations in these fragments. Myracrodruon urundeuva, Tabebuia impetiginosa and Astronium fraxinifolium, the most logged species, had high density of seedlings in all the fragments. However, the highest density of saplings and juvenile individuals occurred in the most disturbed fragment.As estruturas populacionais de seis espécies de árvores foram estudadas em três fragmentos de floresta estacional decidual intactos e três fragmentos impactados pela exploração seletiva de madeira no nordeste goiano. Quarenta parcelas de 400m² foram estabelecidas em cada fragmento para a amostragem de populações, número de tocos, fezes de gado, troncos queimados e abertura de dossel. A cobertura do solo por formas de vida foi estimada em sub-parcelas de 1m². Lianas foram mais abundantes em fragmentos com perturbação intermediária, enquanto herbáceas invasoras no fragmento mais perturbado. Cavanillesia arborea, Eugenia dysenterica e Swartzia multijuga ocorreram em densidades muito baixas em todos os fragmentos e plântulas foram praticamente ausentes, o que pode ameaçar o futuro de suas populações. Myracrodruon urundeuva, Tabebuia impetiginosa e Astronium fraxinifolium, as espécies mais

  15. [Trends of angiosperm genome evolution].

    Science.gov (United States)

    Sheremet'ev, S N; Gamaleĭ, Iu V; Slemnev, N N

    2011-01-01

    Direction of evolutionary variability of parameters of genome size and structurally functional activity of plants on life forms groups and angiosperms taxa are analyzed. It is shown that, in the Cretaceous-Cenozoic, their nuclear genome tended to increase. Functional genome efficiency (intensity of functions per 1 pg of DNA) decreased from as much as possible high at trees and lianas of rain and monsoonal forests of the Paleogene to minimum at shrubs, perennial and annual grasses of meadow-steppe vegetation which had appeared in the neogene. Important for the vegetation environmental changes in temperature, humidity and CO2 concentration in an adverse direction are discussed as the cause of evolutionary genome size growth and decrease in its functional efficiency. Price for phylogenetic adaptogenesis of angiosperms to the step Cenozoic climate cooling was 4-fold and more genome growth.

  16. Fenología de las palmas de una selva cálido húmeda de México

    Directory of Open Access Journals (Sweden)

    1992-01-01

    Full Text Available PHÉNOLOGIE DES PALMIERS D’UNE FORÊT TROPICALE HUMIDE DU MEXIQUE. Cette étude décrit l’activité phénologique des palmiers de la forêt tropicale humide du sud-est de Veracruz, Mexique. La floraison se concentre dans la période de moindre précipitation, contrairement à la fructification qui diminue à cette époque, avec toutefois un léger sommet en février, et des valeurs relativement constantes pendant le reste de l'année. Ce comportement a été comparé à celui des arbres et des lianes et des résultats similaires ont été observés pour la floraison. Quant à la fructification, elle est constante tout au long de l'année pour les lianes, alors que les arbres présentent deux sommets d'activité (en saison sèche et en saison pluvieuse d'hiver. Les analyses statistiques montrent que la floraison et la fructification des trois formes biologiques est différente. Ces résultats sont comparés à la phénologie des plantes de l'île de Barro Colorado, Panamá. Se documenta la actividad fenológica de las palmas de una selva del SE de Veracruz, México. La floración se concentró durante la época de menor precipitación, a diferencia de la fructificación que disminuye en este período, con un ligero máximo en febrero y valores relativamente constantes durante el resto del año. Al comparar estos patrones con árboles y lianas, se observan resultados similares para la floración, en tanto que la fructificación resultó constante durante todo el año para las lianas, pero no para los árboles, ya que estos exhiben dos máximos de actividad (en temporada de “secas” y de “lluvias de invierno”. Los análisis estadísticos mostraron que la floración y fructificación de las tres formas resultó distinta. Estos resultados son confrontados con la fenología de las plantas de la Isla de Barro Colorado, Panamá. PHENOLOGY OF THE PALMS IN A TROPICAL RAIN FOREST OF MEXICO. t The phenology of palms in a tropical rain forest in SE

  17. Bioactive properties of Tynanthus panurensis (Bureau) Sanwith bark extract, the Amazonian "clavo huasca".

    Science.gov (United States)

    Morales, Lidia; Acero, Nuria; Galán, Antonio; Perez-García, Carmen; Alguacil, Luis Fernando; Muñoz-Mingarro, Dolores

    2011-09-01

    Tynanthus panurensis (Bureau) Sanwith (Bignoniaceae) is a liana vine used in traditional Amazonian medicine as a tonic and energizer as well as a treatment for rheumatism. These traditional indications prompted this study of the antioxidant and anti-inflammatory activities of T. panurensis bark extract (ETP). Phytochemical analysis of ETP showed the presence of saponins and a high concentration of phenols and flavonoids. A battery of in vitro tests revealed that the extract has free radical-scavenging antioxidant properties and reduces microsomal lipid peroxidation, uric acid synthesis, and tumor necrosis factor-α production. The anti-inflammatory properties of ETP were further confirmed in vivo in a rat carrageenan edema model, in which the extract exhibited a potent activity. These results support the idea that T. panurensis bark extract could be beneficial for treating inflammation and are in agreement with one of the main traditional uses of this plant.

  18. Sleeping site selection by agile gibbons: the influence of tree stability, fruit availability and predation risk.

    Science.gov (United States)

    Cheyne, Susan M; Höing, Andrea; Rinear, John; Sheeran, Lori K

    2012-01-01

    Primates spend a significant proportion of their lives at sleeping sites: the selection of a secure and stable sleeping tree can be crucial for individual survival and fitness. We measured key characteristics of all tree species in which agile gibbons slept, including exposure of the tree crown, root system, height, species and presence of food. Gibbons most frequently slept in Dipterocarpaceae and Fabaceae trees and preferentially chose trees taller than average, slept above the mean canopy height and showed a preference for liana-free trees. These choices could reflect avoidance of competition with other frugivores, but we argue these choices reflect gibbons prioritizing avoidance of predation. The results highlight that gibbons are actively selecting and rejecting sleeping trees based on several characteristics. The importance of the presence of large trees for food is noted and provides insight into gibbon antipredatory behaviour. Copyright © 2013 S. Karger AG, Basel.

  19. Identification of N,N-dimethyltryptamine and beta-carbolines in psychotropic ayahuasca beverage.

    Science.gov (United States)

    Gambelunghe, Cristiana; Aroni, Kyriaki; Rossi, Riccardo; Moretti, Luca; Bacci, Mauro

    2008-10-01

    Recently many people have shown great interest in traditional indigenous practices and popular medicine, involving the ingestion of natural psychotropic drugs. We received a request to analyze and determine the nature of a dark green liquid with a dark brown plant sediment, which the police had seized at an airport and inside the home of a person belonging to the 'Santo Daime' religious movement. Gas chromatography/mass spectrometry analysis of the extract identified N,N-dimethyltryptamine, a potent hallucinogen, and the beta-carboline alkaloids harmine and harmaline, revealing monoamine oxidase A-inhibiting properties. These substances are typical components of Ayahuasca, a South American psychotropic beverage obtained by boiling the bark of the liana Banisteriopsis caapi together with the leaves of various admixture plants, principally Psychotria viridis.

  20. Morphology and anatomy of the developing fruit and seed of Dalechampia stipulacea Müll. Arg. (Euphorbiaceae - DOI: 10.4025/actascibiolsci.v31i4.4834

    Directory of Open Access Journals (Sweden)

    Luiz Antonio de Souza

    2009-08-01

    Full Text Available In forest remnants of Maringá, Paraná, Brazil, there is abundance of the liana species, with little studied reproductive structures, morphologically and anatomically. Among these species occurs Dalechampia stipulacea Müll. Arg., which is the object of the present study. It is a Euphorbiaceae with pseudanthium and trichomes that cause irritation of the skin. The fruits and seeds were fixed and cut freehand and in a rotation microtome, according to the usual techniques. The fruit is a schizocarp tricocca with loculicidal and septicidal dehiscence. The mature pericarp presents sclerenchymatous middle mesocarp and endocarp that originate from meristems installed in the ovary mesophyll and epidermis. The inner mesocarp is constituted by a layer of macrosclereids of subepidermic origin. The seed originates from anatropous, bitegmic and crassinucelate ovule; it is exotegmic and albuminous. The seed presents structural characteristics verified in Acalyphoideae, except for the mesotegmen vascularization

  1. Ecosystem carbon storage and partitioning in a tropical seasonal forest in Southwestern China

    DEFF Research Database (Denmark)

    Lü, Xiao-Tao; Yin, Jiang-Xia; Jepsen, Martin Rudbeck

    2010-01-01

    in Malaysia. The variation of C storage in the tree layer among different plots was mainly due to different densities of large trees (DBH > 70 cm). The contributions of the shrub layer, herb layer, woody lianas, and fine litter each accounted for 1-2 t C ha-1 to the total carbon stock. The mineral soil C...... pools (top 100 cm) ranged from 84 to 102 t C ha-1 and the C in woody debris from 5.6 to 12.5 t C ha-1, representing the second and third largest C component in this ecosystem. Our results reveal that a high percentage (70%) of C is stored in biomass and less in soil in this tropical seasonal forest...

  2. Shape matters: improved flight in tapered auto-rotating wings

    Science.gov (United States)

    Liu, Yucen; Vincent, Lionel; Kanso, Eva

    2017-11-01

    Many plants use gravity and wind to disperse their seeds. The shape of seed pods influence their aerodynamics. For example, Liana seeds form aerodynamic gliders and Sycamore trees release airborne ``helicopters.'' Here, we use carefully-controlled experiments and high-speed photography to examine dispersion by tumbling (auto-rotation) and we focus on the effect of geometry on flight characteristics. We consider four families of shapes: rectangular, elliptic, tapered, and sharp-tip wings, and we vary the span-to-chord ratio. We find that tapered wings exhibit extended flight time and range, that is, better performance. A quasi-steady two-dimensional model is used to highlight the mechanisms by which shape affects flight performance. These findings could have significant implications on linking seedpod designs to seed dispersion patterns as well as on optimizing wing design in active flight problems.

  3. Effects of an invasive plant species, celastrus orbiculatus, on soil composition and processes

    Science.gov (United States)

    Leicht-Young, S. A.; O'Donnell, H.; Latimer, A.M.; Silander, J.A.

    2009-01-01

    Celastrus orbiculatus is a non-native, invasive liana that was introduced to the United States in the 1860s and has spread rapidly throughout the Northeast Several attributes contribute to the invasiveness of C. orbiculatus, including tolerance to a wide range of light levels and habitat types. We compared soil characteristics in seven sets of adjacent, paired plots, spanning a range of habitats and soil types, with and without C. orbiculatus. The paired plots were similar other than the presence or absence of Celastrus. Plots with C. orbiculatus had significantly higher soil pH, potassium, calcium and magnesium levels. Furthermore, nitrogen mineralization and litter decomposition rates were higher in plots with C. orbiculatus. Phosphorus levels were not significantly different between the paired plots. The results of this study contribute to the growing body of research of the effects of invasive species on ecosystem processes.

  4. Construction of arboreal nests by brown-nosed coatis, Nasua nasua (Carnivora: Procyonidae in the Brazilian Pantanal

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    Natalie Olifiers

    2009-09-01

    Full Text Available The construction of arboreal nests is rare among mammals in the order Carnivora. However, coatis (Procyonidae: Nasua Storr, 1780 build arboreal nests that are used for resting or birthing. Here we describe Nasua nasua (Linnaeus, 1766 nests located during a telemetry study of coatis in the Brazilian Pantanal. Coati nests were all "bird-like", that is, open nests having a semispherical shape. Nests were constructed of twigs, branches, and lianas sometimes interlaced with leaves. Nest volume was 30-50 cm³ and average nest height was approximately 9.5 m. Nests were found in open "cerrado" vegetation, along forest edges, or in interior "cordilheiras" forest. The reasons why coatis build such nests are unclear, but may relate to inter or intraspecific competition for nesting sites, litter size, thermoregulation, and predation avoidance.

  5. New Record Marsdenia tenacissima (Asclepiadoideae, Apocynaceae In Gunung Ijo Baturagung Yogyakarta

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    Widodo Widodo

    2016-04-01

    Full Text Available Marsdenia tenacissima population were found among wild bushes at S 07 o 47’ 03.4”; E 110o 30’ 48.0” about 415 meter above sea level in Gunung Ijo Baturagung Yogyakarta. Identification was based on literature and herbarium specimen. The research was conduct using exploration methods, morphoanatomical observation, and specimen collection. Marsdenia tenacissima in Jawa was not reported in Flora of Java. Marsdenia tenacissima habitus was liana. The specific character for its identification was pollinia’s structure. This paper presented other important character namely leaf, stem, flower, pollinia, and fruit of Marsdenia tenacissima in Gunung Ijo Baturagung Yogyakarta. Accurate description and examination of any plant species were needed for its conservation and awareness of public to local biodiversity.

  6. Levantamento florístico de uma mata decídua em Uberlândia, Minas Gerais, Brasil Floriste survey of an area of deciduous forest in Uberlândia, Minas Gerais, Brazil

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    Luciene Alves Rodrigues

    1997-12-01

    Full Text Available Esse trabalho consistiu de levantamento florístico em mata mesófila decídua situada em solo raso de origem basáltica em Uberlândia, Minas Gerais. Foram feitas visitas quinzenais à mata, no período de fevereiro/93 a junho/95, para coletas de exemplares botânicos férteis. O material coletado foi incorporado ao Herbário da Universidade Federal de Uberlândia (HUFU. Foram identificadas 105 espécies de árvores, arbustos, lianas e herbáceas, distribuídas em 88 gêneros e 43 famílias. As espécies mais freqüentes na mata foram: Anadenanthera colubrina, Bauhinia sp., Croton sp., Myracrodruon urundeuva e Sweetiafruticosa. Euphorbiaceae (10, Rubiaceae (8, Mimosaceae (6, Myrtaceae (6, Caesalpinaceae (5 e Fabaceae (5 foram as famílias com maior número de espécies identificadas.A floristic survey was carried out in a deciduous forest on a shallow basaltic soil, in Uberlândia, Minas Gerais. Visits were performed fortnightly from February/93 to June/95. The sampled material was lodged at the Herbarium of the Universidade Federal de Uberlândia (HUFU. A list is provided with 105 species of trees, shrubs, scandent shrubs, lianas and herbs, belonging to 88 genera and 43 botanic families. The most frequent species were: Anadenanthera colubrina, Bauhinia sp., Croton sp., Myracrodruon urundeuva and Sweetia fruticosa. Euphorbiaceae (10, Rubiaceae (8, Mimosaceae (6, Myrtaceae (6, Caesalpinaceae (5 e Fabaceae (5 were the families with the largest numbers of identified species.

  7. Do Small Canopy Gaps Created by Japanese Black Bears Facilitate Fruiting of Fleshy-Fruited Plants?

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    Kazuaki Takahashi

    Full Text Available Japanese black bears often break branches when climbing trees and feeding on fruit in canopies, thereby creating small canopy gaps. However, the role of black bear-created canopy gaps has not been evaluated in the context of multiple forest dynamics. Our hypothesis was that small canopy gaps created by black bears improve light conditions, which facilitates fruiting of adult fleshy-fruited plants located beneath the gaps, and also that this chain interaction depends on interactions among the size of gaps, improved light conditions, forest layers, and life form of plants. The rPPFD, size of black bear-created canopy gaps, and fruiting/non-fruiting of fleshy-fruited plants were investigated in five forest layers beneath black-bear-created canopy gaps and closed canopies of Mongolian oak (Quercus crispula. We found that light conditions improved beneath black bear-disturbed trees with canopy gaps of large size, and the effect of improvement of light conditions was reduced with descending forest layers. Fruiting of fleshy-fruited plants, especially woody lianas and trees, was facilitated by the improvement of light conditions accompanied by an increase in the size of black-bear-created gaps. Data from this study revealed that canopy disturbance by black bears was key for improving light conditions and accelerating fruiting of fleshy-fruited trees and woody lianas in the canopy layers in particular. Therefore, our hypothesis was mostly supported. Our results provide evidence that Japanese black bears have high potential as ecosystem engineers that increase the availability of resources (light and fruit in this study to other species by causing physical state changes in biotic materials (branches of Q. crispula in this study.

  8. Do Small Canopy Gaps Created by Japanese Black Bears Facilitate Fruiting of Fleshy-Fruited Plants?

    Science.gov (United States)

    Takahashi, Kazuaki; Takahashi, Kaori; Washitani, Izumi

    2015-01-01

    Japanese black bears often break branches when climbing trees and feeding on fruit in canopies, thereby creating small canopy gaps. However, the role of black bear-created canopy gaps has not been evaluated in the context of multiple forest dynamics. Our hypothesis was that small canopy gaps created by black bears improve light conditions, which facilitates fruiting of adult fleshy-fruited plants located beneath the gaps, and also that this chain interaction depends on interactions among the size of gaps, improved light conditions, forest layers, and life form of plants. The rPPFD, size of black bear-created canopy gaps, and fruiting/non-fruiting of fleshy-fruited plants were investigated in five forest layers beneath black-bear-created canopy gaps and closed canopies of Mongolian oak (Quercus crispula). We found that light conditions improved beneath black bear-disturbed trees with canopy gaps of large size, and the effect of improvement of light conditions was reduced with descending forest layers. Fruiting of fleshy-fruited plants, especially woody lianas and trees, was facilitated by the improvement of light conditions accompanied by an increase in the size of black-bear-created gaps. Data from this study revealed that canopy disturbance by black bears was key for improving light conditions and accelerating fruiting of fleshy-fruited trees and woody lianas in the canopy layers in particular. Therefore, our hypothesis was mostly supported. Our results provide evidence that Japanese black bears have high potential as ecosystem engineers that increase the availability of resources (light and fruit in this study) to other species by causing physical state changes in biotic materials (branches of Q. crispula in this study).

  9. Differences in seed rain composition in small and large fragments in the northeast Brazilian Atlantic Forest.

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    Knörr, U C; Gottsberger, G

    2012-09-01

    Tropical forests are seriously threatened by fragmentation and habitat loss. The impact of fragment size and forest configuration on the composition of seed rain is insufficiently studied. For the present study, seed rain composition of small and large forest fragments (8-388 ha) was assessed in order to identify variations in seed abundance, species richness, seed size and dispersal mode. Seed rain was documented during a 1-year period in three large and four small Atlantic Forest fragments that are isolated by a sugarcane matrix. Total seed rain included 20,518 seeds of 149 species of trees, shrubs, palms, lianas and herbs. Most species and seeds were animal-dispersed. A significant difference in the proportion of seeds and species within different categories of seed size was found between small and large fragments. Small fragments received significantly more very small-sized seeds (1.5 cm) that were generally very rare, with only one species in small and eight in large fragments. We found a negative correlation between the inflow of small-sized seeds and the percentage of forest cover. Species richness was lower in small than in large fragments, but the difference was not very pronounced. Given our results, we propose changing plant species pools through logging, tree mortality and a high inflow of pioneer species and lianas, especially in small forest fragments and areas with low forest cover. Connecting forest fragments through corridors and reforestation with local large-seeded tree species may facilitate the maintenance of species diversity. © 2012 German Botanical Society and The Royal Botanical Society of the Netherlands.

  10. Oriental bittersweet (Celastrus orbiculatus): Spreading by fire

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    Pavlovic, Noel B.; Leicht-Young, Stacey A.; Grundel, Ralph

    2016-01-01

    In many forest ecosystems, fire is critical in maintaining indigenous plant communities, but can either promote or arrest the spread of invasive species depending on their regeneration niche and resprouting ability. We examined the effects of cutting and burning treatments on the vegetative response (cover, stem density) and root resources of Oriental bittersweet (Celastrus orbiculatus), a liana invasive to North America that was introduced from East Asia. Treatments were control, spring cut, spring burn, spring cut & burn, summer cut, fall cut, fall burn, fall cut & burn, and fall herbicide. Cover was reduced the greatest by herbicide and summer cutting treatments, but increased more in the second year on moraine soils than on sandy soils. Burning and cutting & burning combined resulted in a resprout density four times greater than stem density prior to treatment for stems <2.5 mm diameter than cutting alone. For stems, across all diameter classes, there was a more than 100% increase in stem density with burning and almost a 300% increase in stem density with cutting & burning in the spring. Density of resprouts and root-suckers, and survival increased with increasing stem size. While cutting of C. orbiculatus during the growing season (summer) reduced total nonstructural carbohydrates by 50% below early growing season levels and 75% below dormant season levels, burning did not significantly reduce total nonstructural carbohydrates. Thus, Oriental bittersweet is quite responsive to burning as a disturbance and resprouting and root-suckering creates additional opportunities for growth and attainment of the forest canopy. The positive response of Oriental bittersweet to burning has important implications for management of invasive lianas in fire-dependent forest landscapes.

  11. Patterns of Leaf Biochemical and Structural Properties of Cerrado Life Forms: Implications for Remote Sensing

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    Ball, Aaron; Sanchez-Azofeifa, Arturo; Portillo-Quintero, Carlos; Rivard, Benoit; Castro-Contreras, Saulo; Fernandes, Geraldo

    2015-01-01

    Aim The general goal of this study is to investigate and analyze patterns of ecophysiological leaf traits and spectral response among life forms (trees, shrubs and lianas) in the Cerrado ecosystem. In this study, we first tested whether life forms are discriminated through leaf level functional traits. We then explored the correlation between leaf-level plant functional traits and spectral reflectance. Location Serra do Cipo National Park, Minas Gerais, Brazil. Methods Six ecophysiological leaf traits were selected to best characterize differences between life forms in the woody plant community of the Cerrado. Results were compared to spectral vegetation indices to determine if plant groups provide means to separate leaf spectral responses. Results Values obtained from leaf traits were similar to results reported from other tropical dry sites. Trees and shrubs significantly differed from lianas in terms of the percentage of leaf water content and Specific Leaf Area. Spectral indices were insufficient to capture the differences of these key traits between groups, though indices were still adequately correlated to overall trait variation. Conclusion The importance of life forms as biochemical and structurally distinctive groups is a significant finding for future remote sensing studies of vegetation, especially in arid and semi-arid environments. The traits we found as indicative of these groups (SLA and water content) are good candidates for spectral characterization. Future studies need to use the full wavelength (400 nm–2500 nm) in order to capture the potential response of these traits. The ecological linkage to water balance and life strategies encourages these traits as starting points for modeling plant communities using hyperspectral remote sensing. PMID:25692675

  12. Ecological and reproductive aspects of Aparasphenodon brunoi (Anura: Hylidae in an ombrophilous forest area of the Atlantic Rainforest Biome, Brazil

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    Laura Gomez-Mesa

    2017-10-01

    Full Text Available ABSTRACT Presented is the first information on the ecological and reproductive aspects of the treefrog, Aparasphenodon brunoi Miranda-Ribeiro, 1920, living in ombrophilous forest areas of the Atlantic Rainforest, Brazil. We recorded the species’ daily activity and over the course of a year, population density during the year, microhabitat usage, diet, and some reproductive features (quantity, diameter and mean mass of oocytes, mean reproductive effort of female. Field sampling was conducted monthly from June 2015 to July 2016. Searches for treefrogs were systematic, using visual encounter surveys along 14 plots RAPELD long term research modules established in the forest. For each captured individual, we recorded the hour, microhabitat used, and perch height. The diet of the population was ascertained based on 15 individuals collected outside the study plot areas. Treefrogs used seven different types of microhabitats in the forest but the preferred microhabitats were tree-trunks and lianas. The amount of accumulated rainfall and air temperature interacted to explain the number of A. brunoi individuals active throughout the year. The reproductive strategy for females of this comparatively large arboreal frog in the ombrophilous forest is to produce clutches with a large number (900.8 ± 358.1 of relatively small-sized eggs. We conclude that in the ombrophious forest of the Vale Natural Reserve, A. brunoi is a nocturnal arboreal treefrog active throughout the year but activity increases during the wet season as a result of increased precipitation. In the forest, treefrogs tend to perch mainly on tree-trunks and lianas about 1 m above ground, where it feeds preferably on relatively large bodied arthropod prey. When living in the ombrophilous forest of the Atlantic rainforest, A. brunoi may change some features of its ecology (e.g. marked difference in the use of bromeliads compared to when living in restinga habitats.

  13. COMPOSICIÓN, ESTRUCTURA Y PATRÓN ESPACIAL DE UN BOSQUE TUCUMANO-BOLIVIANO EN EL DEPARTAMENTO DE TARIJA (BOLIVIA

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    F. Santiago Zenteno-Ruiz

    2010-01-01

    Full Text Available El bosque tucumano-boliviano, en su sector correspondiente a Bolivia, ha comenzado a ser conocido con mayor detalle en los últimos años. Sin embargo, los estudios realizados han tenido un carácter más cualitativo o se han realizado en superficies pequeñas (0,1 ha; además, la biogeografía de sus zonas más bajas no está del todo clara. Por otro lado, algunos aspectos ecológicos, como los referidos a patrones espaciales de los árboles, no han sido nunca abordados. Nosotros realizamos el estudio de una hectárea de bosque tucumano-boliviano a 700-950 m, y mapeamos todos los árboles y lianas con DAP ¿10 cm a fin de caracterizar cuantitativamente un área representativa de este bosque. El propósito fue conocer su composición, abundancia y estructura. Realizamos el primer estudio de patrones espaciales para este tipo de bosque en Bolivia. Registramos 591 individuos agrupados en 31 familias, 47 géneros y 57 especies. Seis especies fueron las más abundantes: Urera caracasana, Trichilia clausenii, Piper tucumanum, Diatenopteryx sorbifolia, Chrysophyllum gonocarpum y Cupania vernalis. El bosque estudiado puede considerarse parte del bosque tucumano-boliviano más que del Arco Pleistocénico. El área basal total fue de 29.4 m2/ha. La presencia de lianas fue relativamente baja, lo que indica que se trata de un bosque relativamente poco perturbado. Se trata de un lugar diverso. La riqueza específica resultó comparable a la de los bosques secos de Madidi (La Paz, Bolivia, y superior a la del tucumano-boliviano en el lado argentino, y fue estimada en 74 especies de árboles. La diversidad (3,5 índice Shannon-Wiener es tan alta como la de muchos bosques más tropicales, e incluso algunos amazónicos. Encontramos un patrón espacial aleatorio en los individuos de la comunidad, y la mayoría de las especies presentó agregación a alguna escala espacial.

  14. Trepadeiras: florística da Estação Ecológica do Caiuá e chave de identificação vegetativa para espécies do Norte do Estado do Paraná - doi: 10.4025/actascibiolsci.v34i2.5892 Climbers: flora of the Caiuá Ecological Station and an identification key for the vegetative species of Northern Paraná State - doi: 10.4025/actascibiolsci.v34i2.5892

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    Juliana de Souza Carneiro

    2012-03-01

    Full Text Available As trepadeiras são plantas com alta representatividade nas florestas tropicais e de grande importância ecológica, apontadas como um dos fatores básicos que diferencia florestas tropicais de temperadas. Este trabalho apresenta as espécies de trepadeiras da Estação Ecológica do Caiuá (EECAIUÁ, município de Diamante do Norte, Estado do Paraná, inserida na floresta estacional semidecidual (FES submontana, situada à margem do rio Paranapanema. Foram encontradas 17 famílias, 44 gêneros e 53 espécies. As cinco famílias mais ricas em número de espécies perfazem juntas 57% do total encontrado. As trepadeiras herbáceas ocorrem em menor número quando comparadas às lianas, e quanto à estratégia utilizada para ascender, as volúveis são as mais diversas, seguidas pelas de órgãos preensores (gavinhas e escandentes. Uma chave de identificação para famílias, baseada em caracteres vegetativos, foi produzida para as famílias desta localidade com as famílias encontradas em outras duas no Norte do Paraná.Climbers are highly represented in tropical forests and are of great ecological importance, having been identified as one of the key factors that differentiate tropical forests from temperate rainforests. This paper presents the climber species of the Caiuá Ecological Station (EECAIUÁ in the City of Diamante do Norte, Paraná State; the Station is located in a submountainous seasonal semideciduous forest (SSF and is situated on the edge of the Paranapanema river. We found 17 families, 44 genera and 53 species of vines. The five families with the greatest number of species jointly accounted for 57% of the total species found. Herbaceous vines occurred less frequently than did lianas. When considering the climbing strategy used by the species, the graspers were the most diverse, followed by those that had tendrils (scramblers and climbers. An identification key based on vegetative characters of families found in other parts of

  15. Diversity and habitat differentiation of mosses and liverworts in the cloud forest of. Monteverde, Costa Rica

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    Gradstein S. Rob

    2001-07-01

    Full Text Available An inventory of the understory and canopy of 4 ha oflower montane cloud forest at Monteverde, Costa Rica, yielded 190 bryophyte species: 133 hepatics, 56 mosses and 1 homwort. Thick branches of the lower canopy were by far the richest habitat in terms of number of species (99, trunks from 1m upwards had 65 species, lianas, shrubs, saplings, or living leaves in the understory had about 36-46 species each, and 16 species were found on rotten logs. The figures are illustrative of the great diversification of microhabitats of bryophytes in a tropical montane cloud forest. About 36% ofthe species, including more than half ofthe corticolous ones, occurred exclusively in the canopy. It appeared thatthe percentage ofbryophyte species restricted to the canopy may be the same in lowland and montane rain forests, in spite of the great differences in species abundance and composition in the two kinds of forest.  Ciento noventa especies de briofitas (133 hepáticas, 56 musgos, 1 antocerote fueron encontradas en un inventario hecho en 4 hectáreas del sotobosque y el dosel en el bosque nublado (1500 m de Monteverde, Costa Rica. Las ramas gruesas del dosel fueron la porción más rica en termino de numero de especies (99, en troncos había 65 especies, lianas, arbustos, árboles juveniles o hojas vivas en el sotobosque tenían entre 36-46 especies cada una, y 16 especies fueron encontradas en troncos en descomposición. Las cifras ilustran la gran diversidad de microhabitats de briofitas en el bosque nublado. Cerca de 36% de las especies, incluyendo mas de la mitad de los corticolos, se presentaron exclusivamente en el dosel. Parece que el porcentaje de especies de briofitas restringidas al dosel podría ser el mismo en bosques de tierras bajas y en bosques nublados, a pesar de la gran diferencia en abundancia y composición taxonómica de las briofitas en las dos clases de bosque.

  16. A Meta-analysis of Plant Photosynthetic Traits and Water-use efficiency Responses to Drought

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    Zhang, J.

    2017-12-01

    Drought is predicted to become more intense and frequent in many regions of the world in the context of climate change, especially in the semi-arid regions of the Northern Hemisphere. Understanding the plant photosynthetic traits (Pn, Gs and Tr) and water use efficiency (WUE) response to drought is very important with regard to plant growth and productivity, which could reflect the terrestrial primary productivity worldwide. We used a meta-analysis based on studies of a worldwide range and full plant species Pn, Gs, Tr and WUE under drought condition and aimed to determine the responses of Pn, Gs, Tr and WUE of different drought intensities (mild, moderate and severe), different photosynthetic pathways (C3 and C4) and growth forms (herbs, shrubs, trees and lianas). Furthermore, reveal the differences from different plant groups (e.g. C3 and C4 plants; annual (A-herbs) and perennial (P-herbs) herbs; conifer, deciduous and evergreen trees) under the same drought intensities. Additionally, we analyzed the relationship between stomatal conductance (Gs) with Pn, Tr and WUE. Our results were as follows: 1) drought decreased the photosynthetic traits with the drought stress increasing, but increased the water use efficiency, and increased to the greatest extent in lianas, compared with herbs, shrubs and trees. 2) Furthermore, C4 plants had an advantage in photosynthesis compared to C3 plants under the same drought conditions. However, the WUE in C4 plants was not promoted as in C3 plants. The photosynthesis traits showed a more substantial decrease in P-herbs than in A-herbs. The drought promoted the WUE in P-herbs, but inhibited it in A-herbs. Compared with conifer and deciduous trees, the photosynthesis traits declined the most in evergreen tree. The WUE in deciduous trees showed a more obvious increase among the three leaf habits. 3) Finally, the Gs showed a close relationship with photosynthesis rate (Pn) and transpiration rate (Tr), which could explain 50% of the

  17. Plantio de Myracrodruon urundeuva Fr. All. (aroeira em área alterada de floresta: desenvolvimento das mudas e restauração florestal. Planting of Myracrodruon urundeuva Fr. All. (aroeira in altered area of forest: seedling development and forest restoration.

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    José Eduardo de Arruda BERTONI

    2007-06-01

    Full Text Available Fragmentos florestais submetidos aalgum tipo de distúrbio têm recuperação lenta oupode até mesmo não ocorrer. Nas bordas ocrescimento indiscriminado de cipós e gramíneasdificultam a regeneração natural. Para acelerar arestauração, muitas vezes é necessária a intervençãohumana. Uma área alterada de floresta foi restauradaatravés de um manejo simples que consistiu nocorte periódico de cipós, gramíneas e combate àsformigas saúvas. Na área a ser restaurada, foramplantadas mudas da espécie arbórea Myracrodruonurundeuva Fr. All. – Anacardiaceae (aroeira, com oobjetivo de avaliar o desenvolvimento e ocomportamento desta espécie quando plantadanuma área em restauração. A regeneração naturalfoi favorecida pelo manejo utilizado, pela presençado banco de sementes de espécies pioneiras nosolo, pelas fontes de dispersão de sementes e pelacoroação das mudas de aroeira plantadas. Comoresultado, no 4o ano após a implantação, inúmerasespécies pioneiras e as aroeiras davam à áreafisionomia de capoeira em franca recuperação.O método utilizado mostrou ser eficiente e práticopara restauração de áreas alteradas, como clareiras ebordas de fragmentos florestais.Forest fragments under some kind ofdisturbance might have a slow recovery rate or itmight not happen. Throughout borders theindiscriminate growth of lianas and grasses turnsdifficult the natural regeneration. Sometimes thehuman intervention is necessary to accelerate therestoration. A disturbed area of forest was restoredthrough a simple management that consisted ofperiodical control of lianas, grasses and leafcuttingant. In this area seedlings of the arborealspecies Myracrodruon urundeuva Fr. All. –Anacardiaceae (aroeira were planted to evaluatethe development and conduct of this specieswhen planted in recovering area. The naturalregeneration of arboreal stratum was acceleratedby the management, presence of seeds bank ofpioneer species in the soil, sources

  18. Quantification and identification of lightning damage in tropical forests.

    Science.gov (United States)

    Yanoviak, Stephen P; Gora, Evan M; Burchfield, Jeffrey M; Bitzer, Phillip M; Detto, Matteo

    2017-07-01

    Accurate estimates of tree mortality are essential for the development of mechanistic forest dynamics models, and for estimating carbon storage and cycling. However, identifying agents of tree mortality is difficult and imprecise. Although lightning kills thousands of trees each year and is an important agent of mortality in some forests, the frequency and distribution of lightning-caused tree death remain unknown for most forests. Moreover, because all evidence regarding the effects of lightning on trees is necessarily anecdotal and post hoc, rigorous tests of hypotheses regarding the ecological effects of lightning are impossible. We developed a combined electronic sensor/camera-based system for the location and characterization of lightning strikes to the forest canopy in near real time and tested the system in the forest of Barro Colorado Island, Panama. Cameras mounted on towers provided continuous video recordings of the forest canopy that were analyzed to determine the locations of lightning strikes. We used a preliminary version of this system to record and locate 18 lightning strikes to the forest over a 3-year period. Data from field surveys of known lightning strike locations (obtained from the camera system) enabled us to develop a protocol for reliable, ground-based identification of suspected lightning damage to tropical trees. In all cases, lightning damage was relatively inconspicuous; it would have been overlooked by ground-based observers having no knowledge of the event. We identified three types of evidence that can be used to consistently identify lightning strike damage in tropical forests: (1) localized and directionally biased branch mortality associated with flashover among tree and sapling crowns, (2) mortality of lianas or saplings near lianas, and (3) scorched or wilting epiphytic and hemiepiphytic plants. The longitudinal trunk scars that are typical of lightning-damaged temperate trees were never observed in this study. Given the

  19. Essential Oils from Neotropical Piper Species and Their Biological Activities

    Science.gov (United States)

    da Trindade, Rafaela; Alves, Nayara Sabrina; Figueiredo, Pablo Luís; Maia, José Guilherme S.; Setzer, William N.

    2017-01-01

    The Piper genus is the most representative of the Piperaceae reaching around 2000 species distributed in the pantropical region. In the Neotropics, its species are represented by herbs, shrubs, and lianas, which are used in traditional medicine to prepare teas and infusions. Its essential oils (EOs) present high yield and are chemically constituted by complex mixtures or the predominance of main volatile constituents. The chemical composition of Piper EOs displays interspecific or intraspecific variations, according to the site of collection or seasonality. The main volatile compounds identified in Piper EOs are monoterpenes hydrocarbons, oxygenated monoterpenoids, sesquiterpene hydrocarbons, oxygenated sesquiterpenoids and large amounts of phenylpropanoids. In this review, we are reporting the biological potential of Piper EOs from the Neotropical region. There are many reports of Piper EOs as antimicrobial agents (fungi and bacteria), antiprotozoal (Leishmania spp., Plasmodium spp., and Trypanosoma spp.), acetylcholinesterase inhibitor, antinociceptive, anti-inflammatory and cytotoxic activity against different tumor cells lines (breast, leukemia, melanoma, gastric, among others). These studies can contribute to the rational and economic exploration of Piper species, once they have been identified as potent natural and alternative sources to treat human diseases. PMID:29240662

  20. Ontogenetic modulation of branch size, shape, and biomechanics produces diversity across habitats in the Bursera simaruba clade of tropical trees.

    Science.gov (United States)

    Rosell, Julieta A; Olson, Mark E; Aguirre-Hernández, Rebeca; Sánchez-Sesma, Francisco J

    2012-01-01

    Organismal size and shape inseparably interact with tissue biomechanical properties. It is therefore essential to understand how size, shape, and biomechanics interact in ontogeny to produce morphological diversity. We estimated within species branch length-diameter allometries and reconstructed the rates of ontogenetic change along the stem in mechanical properties across the simaruba clade in the tropical tree genus Bursera, measuring 376 segments from 97 branches in nine species in neotropical dry to rain forest. In general, species with stiffer materials had longer, thinner branches, which became stiffer more quickly in ontogeny than their counterparts with more flexible materials. We found a trend from short stature and flexible tissues to tall statures and stiff tissues across an environmental gradient of increasing water availability, likely reflecting a water storage-mechanical support tradeoff. Ontogenetic variation in size, shape, and mechanics results in diversity of habits, for example, rapid length extension, sluggish diameter expansion, and flexible tissues results in a liana, as in Bursera instabilis. Even species of similar habit exhibited notable changes in tissue mechanical properties with increasing size, illustrating the inseparable relationship between organismal proportions and their tissue mechanics in the ontogeny and evolution of morphological diversity. © 2012 Wiley Periodicals, Inc.

  1. Capillary electrophoresis as a fast and efficient alternative for the analysis of Urceola rosea leaf extracts.

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    Gufler, Vera; Ngoc, Hieu Nguyen; Stuppner, Hermann; Ganzera, Markus

    2018-03-01

    Urceola rosea, a plant whose leaves are used as food and for medical purposes, is a climbing liana found in many south-east Asian countries. Main polar compounds are flavonoids (kaempferol and quercetin glycosides) and phenolic acids. As an alternative to the established HPLC method their analysis by capillary electrophoresis is described for the first time. It was possible in <8min with a 25mM sodium tetraborate decahydrate solution with pH8.5, at a capillary temperature of 40°C and an applied voltage of 25kV. Up to five compounds could be quantified in different methanolic U. rosea extracts, which showed to be of variable composition; e.g. the content of total flavonoids ranged from 0.29 to 1.08%. In respect to quantitative results as well as validation parameters (e.g. R 2 ≥0.994, recovery rates from 95.5 to 103.6%, inter-day precision≤4.5%) the CE method was well comparable to HPLC. However, in terms of required analysis time and environmental sustainability capillary electrophoresis is definitely advantageous. Copyright © 2017 Elsevier B.V. All rights reserved.

  2. A global analysis of parenchyma tissue fractions in secondary xylem of seed plants.

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    Morris, Hugh; Plavcová, Lenka; Cvecko, Patrick; Fichtler, Esther; Gillingham, Mark A F; Martínez-Cabrera, Hugo I; McGlinn, Daniel J; Wheeler, Elisabeth; Zheng, Jingming; Ziemińska, Kasia; Jansen, Steven

    2016-03-01

    Parenchyma is an important tissue in secondary xylem of seed plants, with functions ranging from storage to defence and with effects on the physical and mechanical properties of wood. Currently, we lack a large-scale quantitative analysis of ray parenchyma (RP) and axial parenchyma (AP) tissue fractions. Here, we use data from the literature on AP and RP fractions to investigate the potential relationships of climate and growth form with total ray and axial parenchyma fractions (RAP). We found a 29-fold variation in RAP fraction, which was more strongly related to temperature than with precipitation. Stem succulents had the highest RAP values (mean ± SD: 70.2 ± 22.0%), followed by lianas (50.1 ± 16.3%), angiosperm trees and shrubs (26.3 ± 12.4%), and conifers (7.6 ± 2.6%). Differences in RAP fraction between temperate and tropical angiosperm trees (21.1 ± 7.9% vs 36.2 ± 13.4%, respectively) are due to differences in the AP fraction, which is typically three times higher in tropical than in temperate trees, but not in RP fraction. Our results illustrate that both temperature and growth form are important drivers of RAP fractions. These findings should help pave the way to better understand the various functions of RAP in plants. © 2015 The Authors. New Phytologist © 2015 New Phytologist Trust.

  3. The complete plastome sequence of Gnetum ula (Gnetales: Gnetaceae).

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    Hsu, Chih-Yao; Wu, Chung-Shien; Surveswaran, Siddharthan; Chaw, Shu-Miaw

    2016-09-01

    This study reports the complete plastome sequence of Gnetum ula, a gymnosperm species of Gnetaceae (Gnetophyta). The plastome is 113 249 bp long. It has a quadripartite structure containing a pair of large inverted repeat regions of 19 772 bp each, a large single-copy region of 64 914 bp, and a small single-copy region of 8791 bp. One hundred sixteen genes were predicted in the plastome, including 68 protein-coding genes, eight ribosomal RNA genes, and 40 transfer RNA genes. The gene density is 1.024 (genes/kb). Similar to other known Gnetum plastomes, the G.ula plastome has lost 20 protein-coding genes commonly present in other seed plant plastomes. Our phylogenetic analyses indicate that the four sampled Gnetum species are monophyletic and that G. ula is close to the two other lianas rather than the only small tree species, G. gnemon. Our phylogenetic trees also indicate that gnetophytes have the fastest evolutionary rates among gymnosperms.

  4. A dieta dos morcegos frugívoros (Mammalia, Chiroptera, Phyllostomidae de um pequeno remanescente de Floresta Estacionai Semidecidual do sul do Brasil The diet of fruit-eating bats (Mammalia, Chiroptera, Phyllostomidae in a small Semideciduous Seasonal Forest remnant in south Brazil

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    Sandra Bos Mikich

    2002-03-01

    Full Text Available The diet of some leaf-nosed frugivorous bats - Artibeus Leach, 1821, Carollia perspicillata (Linnaeus, 1758 and Sturnira lilium (e. Geoffroy, 1810 - was studied for nine consecutive months through faecal analysis of individuais captured with mist-nets in a small forest remnant of Paraná state, Brazil. The analysis revealed that Artibeus spp. exhibited preference for fruits of Ficus spp. and Carollia perspicillata for those of Piper spp., which is in accordance with the results of previous studies. But contrary to what was expected, fruit of Solanum spp. were not found for the diet of Sturnira lilium in spite of their high availabilily (16 species in the study area and their known relationship with this bat genus. The species of consumed fruit belonged to several plant life forms (trees, bushes, and lianas and occurred in several habitais. This result emphasizes the importance of keeping habitat diversity, especially in small isolated reserves. Most consumed fruits were green, in agreement with the chiropterochoric syndrome, but ali seeds were small due to limitations of the sampling method. Fruit species abundance in the study area did not seem to have influenced their consumption, but intra-specific fruit availability did so, since most fruits were consumed within their intra-annual peak of availability.

  5. Caractéristiques structurales et écologiques des populations d'espèces commerciales de bois: une base pour la sylviculture dans les peuplements forestiers de Niaouli (Sud-Benin

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    Agbangla, MM.

    2015-01-01

    Full Text Available Structural and Ecological Characteristics of Commercial Timber species' population: a Basis for Silviculture in Niaouli Forest Stands (Southern Benin. This study was carried out to provide silvicultural guidance in the Niaouli forest (6°43'- 6°44'N and 2°07'- 2°08'E, Southern Benin, based on commercial species. Twenty-three 0.25 ha plots (50 m x 50 m were set to characterize the structure and the ecology of these species' populations. Within each plot of 0.25 ha, three 100 m² sub-plots (10 m × 10 m were set for the assessment of regeneration. A multidimensional scaling was performed with SPSS 16.0 on presence-absence data of species, and led to the identification of four forest stands. Overall, the number of species and their abundance in the stands were linked to the presence of water. Diameter structure and regeneration revealed that the populations of the studied species were not at equilibrium. The silvicultural interventions suggested to equilibrate them were as follows: enrichment of the forest stands with the studied species; removal of liana and clearing of the undergrowth to enable the germination of seeds and the growth of the seedlings of commercial species, and the protection of the forest from illegal logging by improving security.

  6. Ecological aspects of the casque-headed frog Aparasphenodon brunoi (Anura, Hylidae in a Restinga habitat in southeastern Brazil

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    Daniel Oliveira Mesquita

    2004-09-01

    Full Text Available We describe some aspects of the ecology of Aparasphenodon brunoi, a species associated with bromeliads. We comment on the relationships of this species with bromeliad size, microhabitat use, diet and sexual dimorphism. This study was conducted on a Restinga habitat near Presidente Kennedy, state of Espírito Santo, southeastern coast of Brazil. When the animals were found inside the bromeliads, we measure bromeliad and head size of frogs. We analyzed stomach contents and determined the sex and reproductive condition. We found 17 individuals (58.6% in bromeliad leafs, six (20.7% in Cactaceae, three (10.3% in liana and three (10.3% on trunks. The correlation between head measurements and bromeliad size were high, indicating that animals apparently use bromeliads based on their size, which could be related to the minimization of water loss. The most common prey items were beetles, ants, and insect larvae, suggesting that the species is relatively generalist in prey consumption. Aparasphenodon brunoi showed significant sexual size and shape dimorphism with females having larger bodies than males (size and females having tibia, eye diameter and SVL larger than males (shape, but larger sample size and more detailed ecological and life history data are needed to elucidate the factors that have led to sexual size dimorphism.

  7. Actions to control the disturbance and recovery of woodland along the Cauto River in the Cauto sectors and 21

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    Karell Chala Arias

    2016-06-01

    Full Text Available 46 transects of 10 mx 50 m were sampled with a total area of 2.3 ha, systematically distributed in two areas: The Cauto and all 21 individuals were recorded over 7 cm d1.30 m, with the objective to develop actions to control the disturbance and forest recovery. Species richness, structural elements of the index value of ecological, thereafter a canonical correspondence analysis was applied to see the influence of stressors to determine the action of the plants. The diversity was high, represented by 4751 individuals of 86 species of 80 genera and 41 families. The most diverse were Mimosaceae, Boraginaceae, Caesalpinaceae, Malvaceae and Euphorbiaceae, it was determined that 36% of the species are exotic, endemic 3% and 61% are native. Tree species higher index value of ecological importance in the two sectors were Samanea saman, Pithecellobium sweet, Cordia Cordia dentata Trichilia hirta and gerascanthus,. Stressors like; intensive grazing, gully erosion and infestation by lianas are the factors that have historically been altering the dynamics of regeneration and forest composition, causing shortages mainly economically important species.

  8. Tropical rainforest palm communities in Madre de Dios in Amazonian Peru

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    Henrik Balslev

    2016-05-01

    Full Text Available We studied palm communities, in particular species-richness and abundance, in the tropical rainforests in southeastern Peru in 54 transects (5×500m covering an area of 13.5 hectares in flood plain, terra firme, terrace and premontane hills. We found 42 palm species in 18 genera in the transects. Terra firme forest had the highest species richness (38 species followed by floodplain and premontane hills with 27 species and terrace forests with 26 species. The highest palm abundances were found in premontane hill forest which had 3243 palms per hectare and terra firme forest which had 2968 palms per hectare. The floodplain forests were intermediate in palm abundance with 2647 and the terrace forests had the lowest abundance with 1709 palms per hectare. Intermediate sized palms were the most common being represented by 18 species, while large palms were represented with 16 species. There were only eight species of small palms of which one was acaulescent. Only one species of liana palm was registered. Of the 42 species observed in the 54 transects, 20 were cespitose, 21 solitary and two had colonial growth. Seven species were found 40–320 km outside of their previously known range.

  9. Use of Roud Wood in Kaingáng Houses

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    Ricardo Dias Silva

    2002-01-01

    Full Text Available This work has the purpose of describing and analyzing the evolutionary habitation process of the Kaingáng. Its main focus is the typological reading of the shelters as well as the registration of the wooden building system used in the construction of the houses in the “Äpucaraninha” Reserve, located in a district of Londrina. The research proceeds with the elaboration of the genealogy of the kaingáng’s habitation through the consultation to the published historical reports and their chronological organization. The data collection within the group was accomplished through informal interviews, photographic survey and in loco observations. Aspects related to the use of the round wood as well as the other elements that are part of the construction, were verified at this stage. The raw material used in every building system is obtained in the Reserve itself, being the wood used not only in the structure but also in the sealing. The connections are made through fittings and fastenings with liana. In spite of the mixture of values and meanings that the Kaingáng community experiences through the contact with other cultures, traditional aspects related to the building of the “traditional house” are preserved, with no domain of other techniques by most of the group. The registration intends to contribute towards the identification and understanding of important issues related to the spaces built by the man.

  10. Foraging ants trade off further for faster: use of natural bridges and trunk trail permanency in carpenter ants

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    Loreto, Raquel G.; Hart, Adam G.; Pereira, Thairine M.; Freitas, Mayara L. R.; Hughes, David P.; Elliot, Simon L.

    2013-10-01

    Trail-making ants lay pheromones on the substrate to define paths between foraging areas and the nest. Combined with the chemistry of these pheromone trails and the physics of evaporation, trail-laying and trail-following behaviours provide ant colonies with the quickest routes to food. In relatively uniform environments, such as that provided in many laboratory studies of trail-making ants, the quickest route is also often the shortest route. Here, we show that carpenter ants ( Camponotus rufipes), in natural conditions, are able to make use of apparent obstacles in their environment to assist in finding the fastest routes to food. These ants make extensive use of fallen branches, twigs and lianas as bridges to build their trails. These bridges make trails significantly longer than their straight line equivalents across the forest floor, but we estimate that ants spend less than half the time to reach the same point, due to increased carriage speed across the bridges. We also found that these trails, mainly composed of bridges, are maintained for months, so they can be characterized as trunk trails. We suggest that pheromone-based foraging trail networks in field conditions are likely to be structured by a range of potentially complex factors but that even then, speed remains the most important consideration.

  11. LINEAR MIXED MODEL TO DESCRIBE THE BASAL AREA INCREMENT FOR INDIVUDUAL CEDRO (Cedrela odorata L.TREES IN OCCIDENTAL AMAZON, BRAZIL

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    Thiago Augusto da Cunha

    2013-01-01

    Full Text Available Reliable growth data from trees are important to establish a rational forest management. Characteristics from trees, like the size, crown architecture and competition indices have been used to mathematically describe the increment efficiently when associated with them. However, the precise role of these effects in the growth-modeling destined to tropical trees needs to be further studied. Here it is reconstructed the basal area increment (BAI of individual Cedrela odorata trees, sampled at Amazon forest, to develop a growth- model using potential-predictors like: (1 classical tree size; (2 morphometric data; (3 competition and (4 social position including liana loads. Despite the large variation in tree size and growth, we observed that these kinds of predictor variables described well the BAI in level of individual tree. The fitted mixed model achieve a high efficiency (R2=92.7 % and predicted 3-years BAI over bark for trees of Cedrela odorata ranging from 10 to 110 cm at diameter at breast height. Tree height, steam slenderness and crown formal demonstrated high influence in the BAI growth model and explaining most of the growth variance (Partial R2=87.2%. Competition variables had negative influence on the BAI, however, explained about 7% of the total variation. The introduction of a random parameter on the regressions model (mixed modelprocedure has demonstrated a better significance approach to the data observed and showed more realistic predictions than the fixed model.

  12. Tropical forest light regimes in a human-modified landscape.

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    Fauset, Sophie; Gloor, Manuel U; Aidar, Marcos P M; Freitas, Helber C; Fyllas, Nikolaos M; Marabesi, Mauro A; Rochelle, André L C; Shenkin, Alexander; Vieira, Simone A; Joly, Carlos A

    2017-11-01

    Light is the key energy input for all vegetated systems. Forest light regimes are complex, with the vertical pattern of light within canopies influenced by forest structure. Human disturbances in tropical forests impact forest structure and hence may influence the light environment and thus competitiveness of different trees. In this study, we measured vertical diffuse light profiles along a gradient of anthropogenic disturbance, sampling intact, logged, secondary, and fragmented sites in the biodiversity hot spot of the Atlantic forest, southeast Brazil, using photosynthetically active radiation sensors and a novel approach with estimations of vertical light profiles from hemispherical photographs. Our results show clear differences in vertical light profiles with disturbance: Fragmented forests are characterized by rapid light extinction within their low canopies, while the profiles in logged forests show high heterogeneity and high light in the mid-canopy despite decades of recovery. The secondary forest showed similar light profiles to intact forest, but with a lower canopy height. We also show that in some cases the upper canopy layer and heavy liana infestations can severely limit light penetration. Light extinction with height above the ground and depth below the canopy top was highest in fragmented forest and negatively correlated with canopy height. The novel, inexpensive, and rapid methods described here can be applied to other sites to quantify rarely measured vertical light profiles.

  13. Online Recruitment: Feasibility, Cost, and Representativeness in a Study of Postpartum Women.

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    Leach, Liana S; Butterworth, Peter; Poyser, Carmel; Batterham, Philip J; Farrer, Louise M

    2017-03-08

    Online recruitment is feasible, low-cost, and can provide high-quality epidemiological data. However, little is known about the feasibility of recruiting postpartum women online, or sample representativeness. The current study investigates the feasibility of recruiting a population of postpartum women online for health research and examines sample representativeness. Two samples of postpartum women were compared: those recruited online as participants in a brief survey of new mothers (n=1083) and those recruited face-to-face as part of a nationally representative study (n=579). Sociodemographic, general health, and mental health characteristics were compared between the two samples. Obtaining a sample of postpartum women online for health research was highly efficient and low-cost. The online sample over-represented those who were younger (aged 25-29 years), were in a de facto relationship, had higher levels of education, spoke only English at home, and were first-time mothers. Members of the online sample were significantly more likely to have poor self-rated health and poor mental health than the nationally representative sample. Health differences remained after adjusting for sociodemographic differences. Potential exists for feasible and low-cost e-epidemiological research with postpartum populations; however, researchers should consider the potential influence of sample nonrepresentativeness. ©Liana S Leach, Peter Butterworth, Carmel Poyser, Philip J Batterham, Louise M Farrer. Originally published in the Journal of Medical Internet Research (http://www.jmir.org), 08.03.2017.

  14. A meta-analysis of leaf gas exchange and water status responses to drought.

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    Yan, Weiming; Zhong, Yangquanwei; Shangguan, Zhouping

    2016-02-12

    Drought is considered to be one of the most devastating natural hazards, and it is predicted to become increasingly frequent and severe in the future. Understanding the plant gas exchange and water status response to drought is very important with regard to future climate change. We conducted a meta-analysis based on studies of plants worldwide and aimed to determine the changes in gas exchange and water status under different drought intensities (mild, moderate and severe), different photosynthetic pathways (C3 and C4) and growth forms (herbs, shrubs, trees and lianas). Our results were as follows: 1) drought negatively impacted gas exchange and water status, and stomatal conductance (gs) decreased more than other physiological traits and declined to the greatest extent in shrubs and C3 plants. Furthermore, C4 plants had an advantage compared to C3 plants under the same drought conditions. 2) The decrease in gs mainly reduced the transpiration rate (Tr), and gs could explain 55% of the decrease in the photosynthesis (A) and 74% of the decline in Tr. 3). Finally, gas exchange showed a close relationship with the leaf water status. Our study provides comprehensive information about the changes in plant gas exchange and water status under drought.

  15. TREE DIAMETER GROWTH FOLLOWING SILVICULTURAL TREATMENTS IN A SEMI-DECIDUOUS SECONDARY FOREST IN CENTRAL BRAZIL

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    Fábio Venturoli

    2015-03-01

    Full Text Available In the Cerrado biome of Brazil, savannas and dry forests are intimately linked and form mosaics. These forests are composed of species of high commercial value, well accepted in the timber market, which causes intensive deforestation on the remaining vegetation. Thus, the management of these forests is an important alternative to reduce deforestation in the remaining vegetation. The objective of this study was to analyze the response of tree species in relation to silvicultural treatments of competition and liana cutting in a semi-deciduous forest in Central Brazil. The results showed that community basal area increased 24% over 4.8 years and the median periodic annual increment in diameter was about 20% higher in plots with silvicultural treatments: 2.9 mm.yr-1 in the control compared to 3.2 mm.yr-1 to 3.6 mm.yr-1 between treatments. This study demonstrated that it is possible to increase the rates of radial growth through silvicultural techniques.

  16. Mast fruiting is a frequent strategy in woody species of eastern South America.

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    Natalia Norden

    Full Text Available BACKGROUND: It is thought that mast seeding is a rare reproductive strategy in the tropics, since tropical climates are less variable, and fruit consumers tend to be more generalist in these regions. However, previous tests of this hypothesis were based on only few tropical datasets, and none from tropical South America. Moreover, reproductive strategies have been quantified based on the coefficient of variation of interannual seed production, an index that potentially confounds masting and high interannual variability in seed production. METHODOLOGY/PRINCIPAL FINDINGS: We developed a new approach to model the monthly variability in seed production for 28 tree species, and 20 liana species monitored during 5 years in a tropical forest of Central French Guiana. We found that 23% of the species showed a masting pattern, 54% an annual fruiting pattern, and 23% an irregular fruiting pattern. The majority of masting species were trees (8 out of 11, most of them animal-dispersed. The classification into reproductive strategies based on the coefficient of variation was inconsistent with our results in nearly half of the cases. CONCLUSIONS/SIGNIFICANCE: Our study is the first to clearly evidence the frequency of the masting strategy in a tropical forest community of Eastern South America. The commonness of the masting strategy in tropical plants may promote species coexistence through storage dynamics.

  17. Chronic intermittent exposure to ayahuasca during aging does not affect memory in mice

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    N.F. Correa-Netto

    Full Text Available The Quechua term ayahuasca refers to a beverage obtained from decoctions of the liana Banisteriopsis caapi with leaves of Psychotria viridis. The ritualistic use of ayahuasca is becoming a global phenomenon, with some individuals using this beverage throughout life, including in old age. Cognitive impairment is a common manifestation during aging. There are conflicting reports on the ability of some ayahuasca compounds to exert neuroprotective or neurotoxic effects that could improve or impair learning and memory. Animal models provide a relevant and accessible means of investigating the behavioral effects of ayahuasca without the environmental conditions associated with the ritualistic use of the beverage. In this study, we investigated the influence of chronic ayahuasca exposure throughout aging on the spatial reference and habituation memories of mice. Twenty-eight male c57bl/6 mice (6 months old received ayahuasca or water (1.5 mL/kg, orally twice a week for 12 months and were tested in the Morris water maze (MWM, open field and elevated plus maze (EPM tasks before and after treatment. During aging, there was significant impairment in the evocation (but not acquisition of spatial reference memory and in habituation to the open field. There was also a decrease in locomotor activity in the open field and EPM tests, whereas the anxiety parameters were unaltered. Ayahuasca treatment did not alter any of these parameters associated with aging. These findings indicate that chronic exposure to ayahuasca during aging did not affect memory in mice.

  18. Chronic intermittent exposure to ayahuasca during aging does not affect memory in mice.

    Science.gov (United States)

    Correa-Netto, N F; Coelho, L S; Galfano, G S; Nishide, F; Tamura, F; Shimizu, M K; Santos, J G; Linardi, A

    2017-06-05

    The Quechua term ayahuasca refers to a beverage obtained from decoctions of the liana Banisteriopsis caapi with leaves of Psychotria viridis. The ritualistic use of ayahuasca is becoming a global phenomenon, with some individuals using this beverage throughout life, including in old age. Cognitive impairment is a common manifestation during aging. There are conflicting reports on the ability of some ayahuasca compounds to exert neuroprotective or neurotoxic effects that could improve or impair learning and memory. Animal models provide a relevant and accessible means of investigating the behavioral effects of ayahuasca without the environmental conditions associated with the ritualistic use of the beverage. In this study, we investigated the influence of chronic ayahuasca exposure throughout aging on the spatial reference and habituation memories of mice. Twenty-eight male c57bl/6 mice (6 months old) received ayahuasca or water (1.5 mL/kg, orally) twice a week for 12 months and were tested in the Morris water maze (MWM), open field and elevated plus maze (EPM) tasks before and after treatment. During aging, there was significant impairment in the evocation (but not acquisition) of spatial reference memory and in habituation to the open field. There was also a decrease in locomotor activity in the open field and EPM tests, whereas the anxiety parameters were unaltered. Ayahuasca treatment did not alter any of these parameters associated with aging. These findings indicate that chronic exposure to ayahuasca during aging did not affect memory in mice.

  19. 'Hemiepiphyte': a confusing term and its history.

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    Zotz, Gerhard

    2013-06-01

    Over more than 120 years of scientific study since Schimper's seminal work, the recognized categories of structurally dependent plants have changed several times. Currently, ignoring parasitic mistletoes, it is usual to distinguish four functional groups: (1) true epiphytes; (2) primary hemiepiphytes; (3) secondary hemiepiphytes; and (4) climbing plants, i.e. lianas and vines. In this Viewpoint, it is argued that the term secondary hemiepiphytes (SHs) is misleading, that its definition is hard to impossible to apply in the field and, possibly causally related to this conceptual problem, that the use of this category in field studies is inconsistent, which now hampers interpretation and generalization. Categories will frequently fail to capture gradual biological variation, but terms and concepts should be as unambiguous as possible to facilitate productive communication. A detailed analysis of the conceptual problems associated with the term SH and its application in scientific studies clearly shows that this goal is not fulfilled in this case. Consequently, the use of SH should be abandoned. An alternative scheme to categorize structurally dependent flora is suggested.

  20. Distribution and Conservation of Davilla (Dilleniaceae in Brazilian Atlantic Forest Using Ecological Niche Modeling

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    Ismael Martins Pereira

    2014-01-01

    Full Text Available We have modeled the ecological niche for 12 plant species belonging to the genus Davilla (Dilleniaceae which occur in the Atlantic Forest of Brazil. This group includes endemic species lianas threatened by extinction and is therefore a useful indicator for forest areas requiring conservation. The aims are to compare the distribution and richness of species within the protected areas, assessing the degree of protection and gap analysis of reserves for this group. We used the Maxent algorithm with environmental and occurrence data, and produced geographic distribution maps. The results show that high species richness occurs in forest and coastal forest of Espírito Santo to Bahia states. The endemic species comprise D. flexuosa, D. macrocarpa, D. flexuosa, D. grandifolia, and D. sessilifolia. In the Atlantic Forest of southeastern Brazil, the following endemic species occur: D. tintinnabulata and D. glaziovii, with this latter species being included in the “red list” due habitat loss and predatory extractivism. The indicators of species richness in the coastal region of Bahia correspond with floristic inventories that point to this area having a high biodiversity. Although this region has several protected areas, there are gaps in reserves, which, combined with anthropogenic threats and fragmentation, have caused several problems for biodiversity.

  1. CONSERVAÇÃO DAS FLORESTAS DO PROJETO DE ASSENTAMENTO BENFICA, SUDESTE DA AMAZÔNIA

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    Roberta de Fátima Rodrigues Coelho

    2013-01-01

    Full Text Available In this study we analyze the floristic and structure of forest remnants in Benfica Settlement Project located in the municipality of Itupiranga, in southeastern Amazon. Eleven areas of forests located in different properties and different levels of disturbance were selected. Within each area, plants in one plot of 500 m2, were surveyed considering three strata: upper, middle and inferior. The species were classified in five life forms: tree, scrub, liana, palm and herb; and two functional groups, the pioneer and forest species. Two houndred and eighty-six (286 species, 173 genera and 68 families were found. Most woody species (51 % occurred in only one stratum. The richness of species was 70 % of estimated richness by Jack-nife of first order. The percentage of rare species was high, 138 species occurred in only one area. In all strata, the trees had higher density, except in inferior stratum, where the grasses were denser. The forest species, in all strata, were dominant. There was significant difference between the forest and pioneer in all forms of life, in all strata. The principal components analysis showed heterogeneity among the studied plots, forming three groups which appear to be related to the different disturbance levels.

  2. Specific gravity of woody tissue from lowland Neotropical plants: differences among forest types.

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    Casas, Luisa Fernanda; Aldana, Ana María; Henao-Diaz, Francisco; Villanueva, Boris; Stevenson, Pablo R

    2017-05-01

    Wood density, or more precisely, wood specific gravity, is an important parameter when estimating aboveground biomass, which has become a central tool for the management and conservation of forests around the world. When using biomass allometric equations for tropical forests, researchers are often required to assume phylogenetic trait conservatism, which allows us to assign genus- and family-level wood specific gravity mean values, to many woody species. The lack of information on this trait for many Neotropical plant species has led to an imprecise estimation of the biomass stored in Neotropical forests. The data presented here has information of woody tissue specific gravity from 2,602 individual stems for 386 species, including trees, lianas, and hemi-epiphytes of lowland tropical forests in Colombia. This data set was produced by us collecting wood cores from woody species in five localities in the Orinoco and Magdalena Basins in Colombia. We found lower mean specific gravity values in várzea than in terra firme and igapó. © 2017 The Authors. Ecology, published by Wiley Periodicals, Inc., on behalf of the Ecological Society of America.

  3. The role of sex and age in the architecture of intrapopulation howler monkey-plant networks in continuous and fragmented rain forests

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    Julieta Benitez-Malvido

    2016-03-01

    Full Text Available We evaluated the structure of intrapopulation howler monkey-plant interactions by focusing on the plant species consumed by different sex and age classes in continuous and fragmented forests in southern Mexico. For this we used network analysis to evaluate the impact of fragmentation on howler population traits and on resource availability and food choice. A total of 37 tree and liana species and seven plant items (bark, immature fruits, flowers, mature fruits, immature leaves, mature leaves and petioles were consumed, but their relative consumption varied according to sex and age classes and habitat type. Overall, adult females consumed the greatest number of plant species and items while infants and juveniles the lowest. For both continuous and fragmented forests, we found a nested diet for howler monkey-plant networks: diets of more selective monkeys represent subsets of the diets of other individuals. Nestedness was likely due to the high selectivity of early life stages in specific food plants and items, which contrasts with the generalized foraging behaviour of adults. Information on the extent to which different plant species and primate populations depend on such interactions in different habitats will help to make accurate predictions about the potential impact of disturbances on plant-animal interaction networks.

  4. Estimation of the Distribution of Tabebuia guayacan (Bignoniaceae) Using High-Resolution Remote Sensing Imagery

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    Sánchez-Azofeifa, Arturo; Rivard, Benoit; Wright, Joseph; Feng, Ji-Lu; Li, Peijun; Chong, Mei Mei; Bohlman, Stephanie A.

    2011-01-01

    Species identification and characterization in tropical environments is an emerging field in tropical remote sensing. Significant efforts are currently aimed at the detection of tree species, of levels of forest successional stages, and the extent of liana occurrence at the top of canopies. In this paper we describe our use of high resolution imagery from the Quickbird Satellite to estimate the flowering population of Tabebuia guayacan trees at Barro Colorado Island (BCI), in Panama. The imagery was acquired on 29 April 2002 and 21 March 2004. Spectral Angle Mapping via a One-Class Support Vector machine was used to detect the presence of 422 and 557 flowering tress in the April 2002 and March 2004 imagery. Of these, 273 flowering trees are common to both dates. This study presents a new perspective on the effectiveness of high resolution remote sensing for monitoring a phenological response and its use as a tool for potential conservation and management of natural resources in tropical environments. PMID:22163825

  5. Balancing on the edge of word: specificity of women’s accounts of concentration camp life (Delbo, Millu, Szmaglewska, Żywulska

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    Joanna Teklik

    2010-01-01

    Full Text Available The problem of presenting the traumatic experience of deportation and detention in a concentration camp is still painfully topical, the more so that hitherto existing methods and linguistic strategies provide no useful tools for its investigation, being either frustratingly ineffective, or altogether useless. Over time, a certain regularity in handling the problem has become noticeable, i.e. a distinctive separation of the available accounts of the experience into those provided by women and those evidenced by men. The answer to the question of how to narrate has to be then preceded by an appropriate question on social, cultural and gender identity of the narrator. On the basis of the exemplary accounts by four former inmates of the concentration camp at Auschwitz-Birkenau it is possible to understand the specificity and uniqueness of feminine perception of the camp’s reality. The accounts provided by Charlotte Delbo, Liana Millu, Seweryna Szmaglewska and Krystyna Żywulska — all easily identifiable by the different adopted form of message conveyance — share the specificity of women’s subjects raised, aspects closely related to the structure of a woman and her existence in responding to extreme conditions, often omitted in accounts provided by male witnesses. Camp pregnancies, dramatic deliveries, pseudo-scientific experiments, rapes and prostitution — all these constitute additional themes related to by women, victims to the above.

  6. Litter production and seed rain in semideciduous forest fragments at different successional stages in the western part of the state of Paraná, Brazil

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    Maria Angélica Gonçalves Toscan

    2014-09-01

    Full Text Available We documented litter production and seed rain in fragments of semideciduous forest (SDF in the western part of the state of Paraná, Brazil: a late successional fragment (LF; an early successional fragment (EF; and a reforested late successional fragment (RLF. In each fragment, we established three permanent plots with four litter traps each, corresponding to 12 litter traps per fragment. Botanical material was collected monthly between June 2011 and May 2012. We sorted the material by category: leaves; branches; reproductive structures; and miscellaneous. We analyzed the seed rain using the reproductive structures. Annual production was highest (11,560 kg.ha-1 in the LF, followed by the RLF, with 9330 kg.ha-1, and the EF, with 7838 kg.ha-1. The RLF yielded 7167 diaspores, from 33 species, compared with 4751 diaspores, from 38 species, for the EF; in both fragments, pioneer and anemochorous species predominated. The LF yielded 2173 diaspores, from 49 species, among which late secondary and climax species with zoochorous dispersal predominated. We observed asynchrony in the frequency of diaspore production of trees and lianas. Our data describe the dynamics of plant assemblages in SDF fragments and provide information on successional stages, dispersion syndromes, patterns of asynchrony, deciduousness, reproductive periods, and resource availability for frugivores.

  7. Estimation of the Distribution of Tabebuia guayacan (Bignoniaceae Using High-Resolution Remote Sensing Imagery

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    Mei Mei Chong

    2011-03-01

    Full Text Available Species identification and characterization in tropical environments is an emerging field in tropical remote sensing. Significant efforts are currently aimed at the detection of tree species, of levels of forest successional stages, and the extent of liana occurrence at the top of canopies. In this paper we describe our use of high resolution imagery from the Quickbird Satellite to estimate the flowering population of Tabebuia guayacan trees at Barro Colorado Island (BCI, in Panama. The imagery was acquired on 29 April 2002 and 21 March 2004. Spectral Angle Mapping via a One-Class Support Vector machine was used to detect the presence of 422 and 557 flowering tress in the April 2002 and March 2004 imagery. Of these, 273 flowering trees are common to both dates. This study presents a new perspective on the effectiveness of high resolution remote sensing for monitoring a phenological response and its use as a tool for potential conservation and management of natural resources in tropical environments.

  8. Genetic characterization of hybridization between native and invasive bittersweet vines (Celastrus spp.)

    Science.gov (United States)

    Zaya, David N.; Leicht-Young, Stacey A.; Pavlovic, Noel B.; Feldheim, Kevin A.; Ashley, Mary V.

    2015-01-01

    Hybridization associated with species introductions can accelerate the decline of native species. The main objective of this study was to determine if the decline of a North American liana (American bittersweet, Celastrus scandens) in the eastern portion of its range is related to hybridization with an introduced congener (oriental bittersweet, C. orbiculatus). We used newly characterized microsatellite loci, a maternally-inherited chloroplast DNA marker, and field observation to survey individuals across the USA to determine the prevalence of hybrids, their importance in the invasion of C. orbiculatus, and the predominant direction of hybridization. We found that only 8.4 % of non-native genotypes were hybrids (20 of 239), and these hybrids were geographically widespread. Hybrids showed reduced seed set (decline of >98 %) and small, likely inviable pollen. Genetic analysis of a maternally inherited chloroplast marker showed that all 20 identified hybrids came from C. scandens seed parents. The strong asymmetry in pollen flow that favors fecundity in introduced males has the potential to greatly accelerate the decline of native species by wasting limited female reproductive effort.

  9. The metal hyperaccumulators from New Caledonia can broaden our understanding of nickel accumulation in plants

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    Tanguy eJaffré

    2013-07-01

    Full Text Available While an excess of metals such as zinc, cadmium or nickel (Ni is toxic for most plants, about 500 plant species called hyperaccumulators are able to accumulate high amounts of these metals. These plants and the underlying mechanisms are receiving an increasing interest because of their potential use in sustainable biotechnologies such as biofortification, phytoremediation and phytomining. Among hyperaccumulators, about 400 species scattered in 40 families accumulate Ni. Despite this wide diversity, our current knowledge of the mechanisms involved in Ni accumulation is still limited and mostly restricted to temperate herbaceous Brassicaceae. New Caledonia is an archipelago of the tropical southwest pacific with a third of its surface (5500 km2 covered by Ni-rich soils originating from ultramafic rocks. The rich New Caledonia flora contains 2145 species adapted to these soils, among which 65 are Ni hyperaccumulators, including lianas, shrubs or trees, mostly belonging to the orders Celastrales, Oxalidales, Malpighiales and Gentianales. We present here our current knowledge on Ni hyperaccumulators from New Caledonia and the latest molecular studies developed to better understand the mechanisms of Ni accumulation in these plants.

  10. The Ontogeny of Gap Crossing Behaviour in Bornean Orangutans (Pongo pygmaeus wurmbii.

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    Jackie Chappell

    Full Text Available For orangutans, the largest predominantly arboreal primates, discontinuous canopy presents a particular challenge. The shortest gaps between trees lie between thin peripheral branches, which offer the least stability to large animals. The affordances of the forest canopy experienced by orangutans of different ages however, must vary substantially as adult males are an order of magnitude larger in size than infants during the early stages of locomotor independence. Orangutans have developed a diverse range of locomotor behaviour to cross gaps between trees, which vary in their physical and cognitive demands. The aims of this study were to examine the ontogeny of orangutan gap crossing behaviours and to determine which factors influence the distance orangutans crossed. A non-invasive photographic technique was used to quantify forearm length as a measure of body size. We also recorded locomotor behaviour, support use and the distance crossed between trees. Our results suggest that gap crossing varies with both physical and cognitive development. More complex locomotor behaviours, which utilized compliant trunks and lianas, were used to cross the largest gaps, but these peaked in frequency much earlier than expected, between the ages of 4 and 5 years old, which probably reflects play behaviour to perfect locomotor techniques. Smaller individuals also crossed disproportionately large gaps relative to their size, by using support deformation. Our results suggest that orangutans acquire the full repertoire of gap crossing techniques, including the more cognitively demanding ones, before weaning, but adjust the frequency of the use of these techniques to their increasing body size.

  11. MISCELLANEOUS BOTANICAL NOTES—IV*

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    C. G. G. J. VAN STEENIS

    2015-11-01

    Full Text Available 1. In connection with the first record from Malaysia (Atjeh, North Sumatra of a species of Schoepfia (Olacaceae, viz. S. fragrans Wall, in Roxb., some notes on the genus are given, including a key to the species of section Schoepfiopsis (emended and to the two Indian species of Schoepfia. The specimens of the Kew and Leyden Herbaria of these two species are listed. The name Schoepfia ffriffithii Tiegh. is validly published in the present paper, if this was not done before. 2. Smilax pygmaea Merr. (Liliaceae is recorded from Atjeh, Sumatra. 3. The first indigenous species of Mivmlus (Scrophulariaceae, M. tenellus Bunge, is recorded for Malaysia from Atjeh, Sumatra. 4. A new species of Macadamia (Proteaceae is described from Celebes: Maca- damia hildebrandii Van Steenis. It belongs to the same genus as the common Australian bush nut, M. ternifolia, with edible seeds. 5. Some information, additional to a previous paper on Biophytum (Oxalidaceae in Malaysia, is given. • 6. Some records of plants new to Mount Pangrango, West Java, are mentioned. 7. The recent introduction and the present distribution in Malaysia of the weed Eupatorium odoratum L. (Compositae is discussed. 8. Some additional records of the liana Hollrungia aurantioides K. Schum. (Passifloraceae from New Guinea and from outside this island (Ternate, Moluccas are published.

  12. Do plant species influence soil CO2 and N2O fluxes in a diverse tropical forest?

    Science.gov (United States)

    van Haren, Joost L. M.; de Oliveira, R. Cosme; Restrepo-Coupe, Natalia; Hutyra, Lucy; de Camargo, Plinio B.; Keller, Michael; Saleska, Scott R.

    2010-09-01

    To test whether plant species influence greenhouse gas production in diverse ecosystems, we measured wet season soil CO2 and N2O fluxes close to ˜300 large (>35 cm in diameter at breast height (DBH)) trees of 15 species at three clay-rich forest sites in central Amazonia. We found that soil CO2 fluxes were 38% higher near large trees than at control sites >10 m away from any tree (P Caryocar villosum, Lecythis lurida, Schefflera morototoni, and Manilkara huberi were 84%-196% greater than Erisma uncinatum and Vochysia maxima, both Vochysiaceae. Tree species identity was the most important explanatory factor for N2O fluxes, accounting for more than twice the N2O flux variability as all other factors combined. Two observations suggest a mechanism for this finding: (1) sugar addition increased N2O fluxes near C. villosum twice as much (P < 0.05) as near Vochysiaceae and (2) species mean N2O fluxes were strongly negatively correlated with tree growth rate (P = 0.002). These observations imply that through enhanced belowground carbon allocation liana and tree species can stimulate soil CO2 and N2O fluxes (by enhancing denitrification when carbon limits microbial metabolism). Alternatively, low N2O fluxes potentially result from strong competition of tree species with microbes for nutrients. Species-specific patterns in CO2 and N2O fluxes demonstrate that plant species can influence soil biogeochemical processes in a diverse tropical forest.

  13. Patterns in leaf morphological traits of Chinese woody plants and the application for paleoclimate reconstruction

    Science.gov (United States)

    Li, Yaoqi; Wang, Zhiheng

    2017-04-01

    Leaf morphological traits (LMTs) directly influence carbon-uptake and water-loss of plants in different habitats, and hence can be sensitive indicators of plant interaction with climate. The relationships between community-aggregated LMTs and their surrounding climate have been used to reconstruct paleoclimate. However, the uncertainties in its application remain poorly explored. Using distribution maps and LMTs data (leaf margin states, leaf length, leaf width, and length-width product/ratio) of 10480 Chinese woody dicots and dated family-level phylogenies, we demonstrated the variations of LMTs in geographical patterns, and analyzed their relationships with climate across different life-forms (evergreen and deciduous; trees, shrubs and lianas) and species quartiles with different family-ages. Results showed that from southern to northern China, leaves became shorter and narrower, while leaf length-width ratio increased and toothed-margin percentage decreased. Our results revealed great uncertainties in leaf margin-temperature relationships induced by life-form, precipitation and evolutionary history, and suggested that the widely-used method, leaf margin analysis, should be applied cautiously on paleotemperature reconstruction. Differently, mean leaf size responded tightly to spatial variations in annual evapotranspiration (AET) and primary productivity (GPP and NPP), and these relationships remained constant across different life-forms and evolutionary history, suggesting that leaf size could be a useful surrogate for paleo primary productivity.

  14. Enhancement in statistical and image analysis for in situ µSXRF studies of elemental distribution and co-localization, using Dioscorea balcanica

    Energy Technology Data Exchange (ETDEWEB)

    Dučić, Tanja, E-mail: tanja.ducic@desy.de; Borchert, Manuela [DESY, Notkestrasse 85, D-22607 Hamburg (Germany); Savić, Aleksandar; Kalauzi, Aleksandar; Mitrović, Aleksandra; Radotić, Ksenija, E-mail: tanja.ducic@desy.de [University of Belgrade, Kneza Višeslava 1, 11000 Belgrade (Serbia)

    2013-03-01

    Synchrotron-radiation-based X-ray microfluorescence has been used for in situ investigation of the distribution of micronutrient and macronutrient elements in an unstained cross section of a stem of monocotyledonous liana plant Dioscorea balcanica Košanin. The elemental allocation has been quantified and the grouping/co-localization in straight and twisted stem internodes has been analysed. Synchrotron-based X-ray microfluorescence (µSXRF) is an analytical method suitable for in situ investigation of the distribution of micronutrient and macronutrient elements in several-micrometres-thick unstained biological samples, e.g. single cells and tissues. Elements are mapped and quantified at sub-p.p.m. concentrations. In this study the quantity, distribution and grouping/co-localization of various elements have been identified in straight and twisted internodes of the stems of the monocotyledonous climber D. balcanica Košanin. Three different statistical methods were employed to analyse the macro-nutrient and micronutrient distributions and co-localization. Macronutrient elements (K, P, Ca, Cl) are distributed homogeneously in both straight and twisted internodes. Micronutrient elements are mostly grouped in the vasculature and in the sclerenchyma cell layer. In addition, co-localization of micronutrient elements is much more prominent in twisted than in straight internodes. These image analyses and statistical methods provided very similar outcomes and could be applied to various types of biological samples imaged by µSXRF.

  15. Comparison of hand use and forelimb posture during vertical climbing in mountain gorillas (Gorilla beringei beringei) and chimpanzees (Pan troglodytes).

    Science.gov (United States)

    Neufuss, Johanna; Robbins, Martha M; Baeumer, Jana; Humle, Tatyana; Kivell, Tracy L

    2017-12-01

    Studies on grasping and limb posture during arboreal locomotion in great apes in their natural environment are scarce and thus, attempts to correlate behavioral and habitat differences with variation in morphology are limited. The aim of this study is to compare hand use and forelimb posture during vertical climbing in wild, habituated mountain gorillas (Gorilla beringei beringei) and semi-free-ranging chimpanzees (Pan troglodytes) to assess differences in the climbing styles that may relate to variation in hand or forelimb morphology and body size. We investigated hand use and forelimb posture during both ascent and descent vertical climbing in 15 wild mountain gorillas and eight semi-free-ranging chimpanzees, using video records obtained ad libitum. In both apes, forelimb posture was correlated with substrate size during both ascent and descent climbing. While climbing, both apes used power grips and diagonal power grips, including three different thumb postures. Mountain gorillas showed greater ulnar deviation of the wrist during vertical descent than chimpanzees, and the thumb played an important supportive role when gorillas vertically descended lianas. We found that both apes generally had the same grip preferences and used similar forelimb postures on supports of a similar size, which is consistent with their overall similarity in hard and soft tissue morphology of the hand and forelimb. However, some species-specific differences in morphology appear to elicit slightly different grasping strategies during vertical climbing between mountain gorillas and chimpanzees. © 2017 Wiley Periodicals, Inc.

  16. Differential responses of invasive Celastrus orbiculatus (Celastraceae) and native C. scandens to changes in light quality.

    Science.gov (United States)

    Leicht, Stacey A; Silander, John A

    2006-07-01

    When plants are subjected to leaf canopy shade in forest understories or from neighboring plants, they not only experience reduced light quantity, but light quality in lowered red : far red light (R : FR). Growth and other developmental responses of plants in reduced R : FR can vary and are not consistent across species. We compared how an invasive liana, Celastrus orbiculatus, and its closely related native congener, C. scandens, responded to changes in the R : FR under controlled, simulated understory conditions. We measured a suite of morphological and growth attributes under control, neutral shading, and low R : FR light treatments. Celastrus orbiculatus showed an increase in height, aboveground biomass, and total leaf mass in reduced R : FR treatments as compared to the neutral shade, while C. scandens had increased stem diameter, single leaf area, and leaf mass to stem mass ratio. These differences provide a mechanistic understanding of the ability of C. orbiculatus to increase height and actively forage for light resources in forest understories, while C. scandens appears unable to forage for light and instead depends upon a light gap forming. The plastic growth response of C. orbiculatus in shaded conditions points to its success in forested habitats where C. scandens is largely absent.

  17. Variación intraespecifica en el uso de Percha Nocturna de Basiliscus galeritus (Sauria: Corytophanidae en Isla Palma, Pacífico Colombiano

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    Óscar Darío Hernández-Córdoba

    2012-01-01

    Full Text Available Las variaciones en el uso de percha nocturna son en parte un reflejo de la partición de recursos que permite la coexistencia al disminuir la competencia intraespecifica entre individuos de diferentes sexos y tamaños. En este trabajo se evaluó el uso de percha nocturna en los machos, las hembras y los juveniles de Basiliscus galeritus en Isla Palma - Pacífico Colombiano en abril de 2011. Los individuos fueron capturados manualmente y se tomó la información de la altura de la percha, posición en la que estaban perchados, longitud rostro cloacal y cobertura vegetal. Se registraron 39 individuos, encontrando que el tipo de percha utilizado con mayor frecuencia fueron las ramas (46,15% seguido por las hojas (38,46% y ocasionalmente fueron observados sobre lianas, suelo y tallos. Se evaluo el grado de asociación entre los sexos y cada una de las variables estudiadas con la altura de percha utilizando tablas de contingencia. No se detectó asociación alguna aunque el uso de percha estuvo relacionado con el tamaño corporal del individuo, independiente de su sexo. (rs = ‑0,08, p = 0,7.

  18. Extremely long-distance seed dispersal by an overfished Amazonian frugivore.

    Science.gov (United States)

    Anderson, Jill T; Nuttle, Tim; Saldaña Rojas, Joe S; Pendergast, Thomas H; Flecker, Alexander S

    2011-11-22

    Throughout Amazonia, overfishing has decimated populations of fruit-eating fishes, especially the large-bodied characid, Colossoma macropomum. During lengthy annual floods, frugivorous fishes enter vast Amazonian floodplains, consume massive quantities of fallen fruits and egest viable seeds. Many tree and liana species are clearly specialized for icthyochory, and seed dispersal by fish may be crucial for the maintenance of Amazonian wetland forests. Unlike frugivorous mammals and birds, little is known about seed dispersal effectiveness of fishes. Extensive mobility of frugivorous fish could result in extremely effective, multi-directional, long-distance seed dispersal. Over three annual flood seasons, we tracked fine-scale movement patterns and habitat use of wild Colossoma, and seed retention in the digestive tracts of captive individuals. Our mechanistic model predicts that Colossoma disperses seeds extremely long distances to favourable habitats. Modelled mean dispersal distances of 337-552 m and maximum of 5495 m are among the longest ever reported. At least 5 per cent of seeds are predicted to disperse 1700-2110 m, farther than dispersal by almost all other frugivores reported in the literature. Additionally, seed dispersal distances increased with fish size, but overfishing has biased Colossoma populations to smaller individuals. Thus, overexploitation probably disrupts an ancient coevolutionary relationship between Colossoma and Amazonian plants.

  19. Sleeping above the enemy: Sleeping site choice by black-fronted titi monkeys (Callicebus nigrifrons).

    Science.gov (United States)

    Caselli, Christini B; Gestich, Carla C; Nagy-Reis, Mariana B

    2017-10-01

    The costs imposed by predation may result in behavioral adaptations to reduce mortality risk, including the choice and use of sleeping sites. The threat of predation, however, is rarely the sole force shaping sleeping site choice, which is likely to reflect other factors such as foraging needs as well. Here we describe the use of sleeping sites by three groups of small Neotropical monkeys, the black-fronted titi monkeys (Callicebus nigrifrons), and evaluate the role of predation pressure and foraging optimization in their choice of sleeping sites. We monitored each group for 9-20 months at two Atlantic Forest sites in southeastern Brazil. The titi monkeys used taller and larger trees to sleep than the average trees at each study site and chose branches with high vegetation coverage and located in higher forest strata than those used during diurnal activity. Sleeping sites were randomly distributed within each group's home range, and the groups avoided using the same site on consecutive nights. The characteristics of the sleeping sites and the behavior of the titi monkeys suggest that predation avoidance, especially of scansorial carnivores, is an important factor driving sleeping site choice. We conclude that titi monkeys' strategy to avoid predation while sleeping depends on the presence of a heterogeneous forest stratum with large emergent trees and liana tangles, which offer a physical barrier against predators. © 2017 Wiley Periodicals, Inc.

  20. Composição florística de florestas estacionais ribeirinhas no estado de Mato Grosso do Sul, Brasil Floristic composition of seasonal riparian forests in Mato Grosso do Sul state, Brazil

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    Vivian Ribeiro Baptista-Maria

    2009-06-01

    Full Text Available O presente estudo teve como objetivos caracterizar a composição florística em dois trechos de floresta estacional semidecidual associada ao rio Formoso, Bonito, MS, e em três trechos de florestas estacionais deciduais e semideciduais associadas aos rios Salobra, Salobrinha e Perdido ocorrentes no Parque Nacional da Serra da Bodoquena (76.481 ha - única unidade de Conservação Federal de Proteção Integral implantada no Estado de Mato Grosso do Sul. O levantamento florístico foi realizado mensalmente entre o período de outubro/2004 a março/2006, onde foram coletadas fanerógamas em fase reprodutiva (flores e frutos, através do método de tempo de avaliação. O levantamento florístico resultou em 56 famílias, 184 gêneros e 307 espécies. Do total das espécies, 68% apresentaram hábito arbóreo, 17% arbustos, 14% foram lianas e apenas 1% palmeiras. A família Fabaceae (Leguminosae, representada por 51 (16,6% espécies, foi a de maior riqueza. Os resultados obtidos neste trabalho contribuíram para o conhecimento da flora sul-mato-grossense e sua distribuição geográfica, reforçando a necessidade de conservação destas matas ribeirinhas e fornecendo subsídios para os planos de restauração das áreas degradadas do entorno da unidade de conservação e das áreas de proteção permanente (APP's dos rios ocorrentes na região.This study aimed to characterize the floristic composition in two stretches of seasonal semideciduous forest associated with the Formoso River, Bonito, Mato Grosso do Sul State, and in three stretches of seasonal deciduous and semideciduous forests associated with the Salobra, Salobrinha and Perdido rivers in Bodoquena Plateau National Park (76,481 ha - the only Federal Conservation unit with Integral Protection in the state of Mato Grosso do Sul. The floristic survey was carried out monthly from October/2004 to March/2006, where flowering and fruiting phanerogams were collected by the method of evaluation

  1. Distribución, mortalidad y asociación con plantas, de nidos de Paraponera clavata (Hymenoptera: Formicidae en la isla de Barro Colorado, Panamá

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    Rolando Pérez

    1999-12-01

    Full Text Available Se estudió la distribución, mortalidad, reclutamiento y asociación con plantas, de 308 nidos de la hormiga neotropical Paraponera clavata en una parcela de cincuenta hectáreas de bosque viejo en la isla de Barro Colorado entre septiembre de 1993 y febrero de 1995. Los nidos estaban distribuidos uniformemente a través de toda la parcela, y se asociaban de manera significativa con el tipo de hábitat, existían más nidos de los esperados en las planicies altas y en la sección de bosque más joven de la parcela. La densidad promedio era de 6.2 nidos por hectárea. Los nidos con un mayor número de vecinos entre 0 y 20 m de distancia, tenían una mayor probabilidad de morir, si se comparaban con aquéllos que se encontraban separados por distancias mayores. La mortalidad era entre 13.36 y 69.64% dependiendo del intervalo de censo, y el reclutamiento fue del 22.63 y 31.72%. Los nidos se encontraron en las bases de 84 especies de plantas, en 34 familias con cuatro categorías de forma de vida: 76 especies eran árboles, 5 especies eran arbustos, 2 especies eran palmas y 1 era liana. Ocho especies de plantas se asociaban positivamente con los nidos de la hormiga. Plantas medianas entre 8 y 63.9 cm de DAP eran las más utilizadas. Arboles y arbustos pequeños presentan muy poca asociación con los nidos. La hormiga no se asocia con árboles que tienen nectarios extraflorales. El 53% de los nidos tenían a Phrynus gervaisii (Amblypygi: Phrynidae habitando en el interior. Estos nidos presentaron menores tasas de mortalidad en comparación con el resto.We studied the distribution, mortality and association with plants, of 308 nests of the neotropical ant Paraponera clavata, in a permanent 50 hectare plot in old-growth forest on Barro Colorado island between September 1993 and February 1995. Ant nests were uniformly dispersed throughout the plot, and significantly associated with the high plateau and patch of young forest in the plot. The average

  2. Caracterização fitofisionômica e levantamento florístico preliminar no Pantanal dos Rios Mortes-Araguaia, Cocalinho, Mato Grosso, Brasil Vegetation types and preliminary floristic survey in the Mortes-Araguaia Pantanal, Cocalinho, Mato Grosso, Brazil

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    Beatriz Schwantes Marimon

    2001-08-01

    Full Text Available O presente estudo realizou-se no Pantanal dos Rios Mortes-Araguaia, extensa planície inundável localizada no municípo de Cocalinho, nordeste de Mato Grosso, Brasil. Efetuou-se uma caracterização fitofisionômica e um levantamento florístico preliminar da região. Foram selecionados três Sítios, com fitofisionomias representativas: proximidades do Rio das Mortes (12° 37'S; 50° 55'W, foz do Rio das Mortes com o Araguaia (11° 54'S; 50° 48'W e porção mediana do Rio Cristalino (12° 52'S; 50° 49'W. O método de amostragem adotado foi o de levantamentos rápidos. Foram identificadas oito fitofisionomias: Mata Inundável, Caapão, Babaçual, Cerradão, Cerrado stricto sensu, Campo de Murunduns, Campo de Byrsonima orbignyana e Campo Cerrado de Vochysia rufa. Foram levantadas 248 espécies de árvores, arbustos, sub-arbustos e lianas, distribuídas em 158 gêneros e 62 famílias. As fitofisionomias apresentaram um padrão heterogêneo, sendo que nenhuma das espécies ocorreu em todas elas. Porém, Alibertia edulis (L. Rich. A. Rich., Andira cuyabensis Benth., Maprounea guianensis (Aubl. M. Arg., entre outras, ocorreram em seis das oito fitofisionomias. As famílias com maior riqueza foram: Caesalpiniaceae, Annonaceae e Myrtaceae. Ocorreram algumas semelhanças florísticas com o Pantanal do Rio Paraguai, porém, são necessários estudos mais aprofundados para confirmar. Os padrões de heterogeneidade fitofisionômica indicam que a área estudada necessita de medidas conservacionistas.This study was carried out in the Pantanal of the Mortes and Araguaia rivers, a flooded plain located in Cocalinho, northeastern Mato Grosso, Brazil. The objectives of this study were to conduct a preliminary survey of the flora and to characterize the vegetation types. Three representative sites were selected: one near Rio das Mortes (12° 37'S; 50° 55'W, one at the mouth of Araguaia and Mortes rivers (11° 54'S; 50° 48'W and one in the middle portion of

  3. Estrutura e composição florística do estrato arbóreo de um remanescente de Mata Atlântica submontana no município de Rio Bonito, RJ, Brasil (Mata Rio Vermelho Structure and floristic composition of a tree community in a submontane Atlantic Forest remnant in Rio Bonito, RJ, Brazil (Rio Vermelho Forest

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    Fabrício Alvim Carvalho

    2007-08-01

    Full Text Available Neste trabalho, descreveram-se a composição florística e a estrutura do estrato arbóreo de um remanescente de Floresta Ombrófila Densa Submontana (Mata Rio Vermelho na região Centro-Norte fluminense, comparando-a com outras florestas da região. Foram alocadas oito parcelas de 5 m x 100 m, e todos os indivíduos vivos e mortos com DAP > 5 cm foram amostrados. Ao todo, foram registradas 106 espécies pertencentes a 77 gêneros e 32 famílias. As famílias com maior riqueza de espécies foram Leguminosae (13 espécies e Lauraceae (8, e as mais abundantes foram Monimiaceae (13% dos indivíduos e Leguminosae (11%. As espécies mais importantes quanto ao valor de cobertura (VC foram Siparuna guianensis, Apuleia leiocarpa, Cupania oblongifolia e Machaerium brasiliensis, todas características de áreas secundárias. O índice de diversidade de espécies (H' = 3,91 nats.ind-1 foi próximo ao encontrado em outras florestas secundárias. Os resultados (elevado número de árvores mortas, com lianas, perfilhadas e secundárias iniciais; baixo número de árvores de grande porte e área basal indicaram que a mata em foco se encontrava perturbada e em fase de regeneração intermediária. Ainda assim, permanecia detentora de considerável riqueza e diversidade florística, com espécies arbóreas ameaçadas de extinção, como Melanoxylon brauna e Dalbergia nigra. Devido à importância ecológica desde remanescente para a manutenção da flora e fauna local e ao avançado processo de fragmentação da região, sugere-se que a Mata Rio Vermelho seja prioritária em programas de conservação e manejo.This work describes the floristic composition and forest structure of a tree community in a Submontane Ombrofilous Dense Atlantic forest (Rio Vermelho Forest and compares this forest to other remnant forests in the region. Eight 100 m x 5 m plots were allocated and all trees > 5 cm DBH were sampled. A total of 106 species was sampled, distributed in 77

  4. Florística e fitossociologia de uma floresta de vertente na Amazônia Central, Amazonas, Brasil Floristic and phytosociology of a slope forest in Central Amazonia, Amazonas, Brazil

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    Arlem Nascimento de Oliveira

    2004-01-01

    Full Text Available O estudo florístico e fitossociológico de árvores, palmeiras e lianas com diâmetro à altura do peito (DAP >10 cm, em uma floresta de vertente na Amazônia Central (2º35'45" S e 60º12'40" W, foi realizado empregando-se 20 parcelas de 50 x 10 m, distribuídas em dois transectos paralelos de 500 x 10 m. Foram registrados 771 indivíduos, pertencentes a 50 famílias, 120 gêneros e 239 espécies. Das espécies amostradas, 44% são "localmente raras". Sapotaceae, Lecythidaceae, Fabaceae, Caesalpiniaceae e Chrysobalanaceae constituíram as cinco famílias com maior riqueza de espécies e número de indivíduos. Dos 771 indivíduos amostrados, mais de 65% apresentaram DAP > 20 cm. As espécies Eschweilera bracteosa e Protium apiculatum apresentaram os maiores valores de IVI. Cerca de 83% das espécies encontram-se distribuídas aleatoriamente no hectare amostrado. O índice de diversidade Shannon-Wiener foi de 5,01 nats.indivíduo-1, com uniformidade de 0,91, valores altos no contexto de levantamentos semelhantes na região. A heterogeneidade edáfica e topográfica da área, as taxas de recrutamento de novos indivíduos e de espécies "localmente raras" à comunidade local, podem ter contribuído para as altas dissimilaridade (36,2% e diversidade florísticas documentadas neste estudo.The floristic and phytosociological study of trees, palms and lianas with diameter at breast height (DBH >10 cm in a forest slope in Central Amazonia (2º35'45 "S and 60º12'40" W was carried out using 20 plots of 50 x 10 m, distributed in two parallel transects of 500 x 10 m. A total of 771 plants were registered, belonging to 50 families, 120 genera and 239 species. Of the sampled species, 44% are locally rare. Families with the most species and number of individuals were Sapotaceae, Lecythidaceae, Fabaceae, Caesalpiniaceae and Chrysobalanaceae. More than 65% of the sampled plants had DBH > 20 cm. Eschweilera bracteosa and Protium apiculatum were the most

  5. Vegetação da área de proteção ambiental Jabotitiua-Jatium. Município de Viseu, Pará, Brasil Vegetation of the Jabotitiua-Jatium Protected Environmental Area, municipality of Viseu, Pará, Brazil

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    João Ubiratan M. dos Santos

    2003-01-01

    Full Text Available A Área de Proteção Ambiental Jabotitiua-Jatium, localiza-se no município de Viseu, Nordeste do Pará, ocupando uma área de 14.25 ha, sendo criada através da lei municipal n.º 002/98, de 07 de abril de 1998, visando a proteção de um trecho representativo e preservado do litoral paraense, abrigando um espetacular ninhal de guarás (Eudocimus ruber L., ave costeira que encontra-se na lista oficial da fauna em extinção no Brasil. Objetivando auxiliar o plano de manejo ambiental desta APA, o estudo em questão identificou quatro tipos de ambientes, classificados em Mangue, Campo Natural, Floresta Mista com Palmeiras e Restinga. Utilizando-se a metodologia da Avaliação Ecológica Rápida (AER, foi identificado um total de 141 espécies, representantes de 61 famílias. O maior número de espécies corresponde à Floresta Mista com Palmeiras, apresentando 66 representantes, e a menor representatividade diz respeito ao mangue, com apenas quatro espécies. Fabaceae (15, Cyperaceae (10 e Rubiaceae (10, destacaram-se em número de espécies, correspondendo, juntas, a 24,82% do total das espécies registradas. As ervas representam a maioria (48 quanto a forma de vida, seguida dos arbustos (38, árvores (34, Lianas (13, estipe (5 e epífitos (3.The Jabotitiua-Jatium Protected Area comprises 14.25 ha in the Municipal District of Viseu in northeast Pará. The area was established by municipal law 002/98 on 7 April 1998 in order to protect a representative sample of coastal Amazonia, including an important nesting site of the endangered scarlet ibis (Eudocimus ruber L.. The objective of this study was to provide floristic information useful for developing a management plan for the area. Four habitat types were found to occur in the area: mangrove, savanna?, mixed palm-forest, and sandy coastal. A Rapid Ecological Assessment (AER of the area identified 141 species of angiosperms in 61 families. The mixed palm-forest, with 66 species, is the most

  6. Composição florística, espectro biológico e fitofisionomia da vegetação de muçununga nos municípios de Caravelas e Mucuri, Bahia Floristic composition, biological spectrum and phytophysiognomy of muçununga vegetation at Caravelas and Mucuri municipalities, Bahia state, Brazil

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    João Augusto Alves Meira Neto

    2005-02-01

    Full Text Available A pouco conhecida vegetação de muçununga ocorre em Florestas Ombrófilas Densas de Terras Baixas no norte do Espírito Santo e Sul da Bahia, em locais de solo arenoso, úmido e fofo. Este trabalho teve como objetivo realizar estudos florísticos e fitofisionômicos para uma avaliação de como interferências antrópicas influenciaram a composição e a estrutura das muçunungas de Caravelas (17º41'13''S e 39º28'24''W e Mucuri (18º10'29''S e 39º53'25''W, no Estado da Bahia. Foram realizadas incursões na vegetação para coletas botânicas e construção do espectro biológico. Foram feitos perfis em quatro diferentes estratos, em ambas as muçunungas. Na muçununga de Caravelas foram relacionadas 67 espécies de 32 famílias e na de Mucuri, 53 espécies de 31 famílias. Na listagem florística ficou evidenciada a maior riqueza da muçununga de Caravelas. Nos perfis é possível perceber maior equabilidade na distribuição dos indivíduos entre as espécies da muçununga de Caravelas que entre as espécies de Mucuri. Os impactos originários da atividade humana favoreceram as formas de vida hemicriptofítica e as lianas na muçununga de Mucuri. As espécies Baccharis trimera, Blechnum serrulatum, Imperata brasiliensis e Pteridium aquilinum são indicadoras dos impactos de passagem de fogo e pastejo bovino. Os impactos antrópicos nas muçunungas foram os principais responsáveis pela diminuição da biodiversidade nesse tipo de vegetação.Little is known about muçununga vegetation, which occurs surrounded by Tropical Rain Forests in northern Espirito Santo State and southern Bahia State, in sites with sandy and wet soils. This work had the objective of studying floristic and phytophysiognomic aspects in order to evaluate how human activity influenced the structure and composition of the muçununga vegetation of Caravelas (17o41'13''S and 39o28'24''W and Mucuri (18o10'29''S and 39o53'25''W. This work was carried out trough paths in mu

  7. Ecologia da polinização de Ipomoea asarifolia (Ders. Roem. & Schult. (Convolvulaceae na região semi-árida de Pernambuco Pollination ecology of Ipomoea asarifolia (Ders. Roem. & Schult. (Convolvulaceae in the semi-arid area of Pernambuco

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    Lúcia Helena Piedade Kiill

    2003-09-01

    Full Text Available O presente trabalho foi desenvolvido no período de março/1995 a julho/1997, com o objetivo de estudar aspectos da fenologia, polinização e reprodução de Ipomoea asarifolia, na Fazenda Catalunha, Santa Maria da Boa Vista, PE. I. asarifolia é uma liana perene, com hábito exclusivamente rasteiro e floração registrada no período de março a outubro, caracterizada como do tipo cornucópia. As flores estão reunidas em cimeiras, são infundibuliformes, de cor rosa com as mesopétalas magenta, que funcionam como guias de néctar. A antese é diurna (5:30 e 6:00h e a duração das flores é de aproximadamente seis horas. A quantidade de néctar secretada por flor é inferior a 1µl. Abelhas Megachilidae e Apidae foram os principais visitantes desta Convolvulaceae. Liturge huberi Ducke foi considerada polinizador efetivo e Acamptopoeum prinii Holm. e Diadasina riparia Ducke polinizadores ocasionais. Quanto ao sistema de reprodução, I. asarifolia é autoincompatível, produzindo frutos e sementes viáveis somente após polinização cruzada. Os testes de crescimento de tubo polínico mostraram que, após 10 horas, há tubos polínicos na micrópila de óvulos autopolinizados e daqueles submetidos à polinização cruzada, sugerindo que se trata de um sistema de incompatibilidade tardia. Os testes de germinação mostraram que somente as sementes obtidas em condições naturais (93,3% e nos experimentos de polinização cruzada (100% foram viáveis, reforçando os dados obtidos no sistema de reprodução.The present work was carried out during March/1995 to July/1997, to study aspects of the phenology, pollination and reproduction of Ipomoea asarifolia growing at Fazenda Catalunha, Santa Maria da Boa Vista, PE. I. asarifolia is a perennial creeping liana with floration registered in the period of March to October, characterized as a cornucopian pattern of flowering. The flowers are gathered in cymes, with a pink funnel-like corolla with

  8. Diversidade e distribuição de espécies arbóreas em duas matas de galeria na micro-bacia do Riacho Fundo, Distrito Federal Diversity and distribution of arboreal species in two gallery forests in the "Riacho Fundo" hydrographic basin, Distrito Federal

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    Alexandre Bonesso Sampaio

    2000-08-01

    Full Text Available As Matas de Galeria representam uma formação florestal típica do cerrado, que acompanha cursos d'água de pequeno porte. Variações locais na florística e na fitossociologia dessas matas parecem estar correlacionadas principalmente com a topografia, grau de encharcamento do solo e luminosidade. Haveria maior similaridade florística e estrutural entre trechos de matas diferentes, sob condições abióticas semelhantes, do que entre trechos de uma mesma mata sob condições abióticas distintas? Para responder a esta pergunta foram comparadas as comunidades arbóreas das matas de galeria do córrego Riacho Fundo e Açudinho, Distrito Federal, ambas pertencentes à mesma micro-bacia hidrográfica. Nestas duas matas foram estabelecidas linhas de amostragem perpendiculares ao córrego, totalizando 118 parcelas de 10x20m (2,36ha. Foram amostrados todos os indivíduos com DAP>5cm, exceto lianas. A amostragem no Riacho Fundo incluiu 1.831 indivíduos vivos (l,58ha, 150 spp., H' = 4,15 e no Açudinho 1.228 (0,78ha, 126 spp., H' = 4,25. Os resultados indicaram que as variações florísticas e estruturais encontradas entre estas matas podem ser explicadas principalmente pelas condições abióticas, particulares à cada uma delas. Trechos de cada mata que possuem condições ambientais semelhantes foram mais similares entre si do que trechos contíguos na mesma mata, sob condições diferentes, conforme foi verificado pela classificação por TWINSPAN. As condições de drenagem do solo, as fitofisionomias adjacentes e o histórico de perturbação foram os principais fatores determinantes dos agrupamentos.Local variation in the floristic composition and structure of gallery forests seems to be related to slope, soil humidity and light. Would the floristic similarity between patches of different forests under similar abiotic conditions be higher than the similarity between patches of the same forest under different conditions? "Riacho Fundo" and "A

  9. High tolerance to salinity and herbivory stresses may explain the expansion of Ipomoea cairica to salt marshes.

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    Gang Liu

    Full Text Available Invasive plants are often confronted with heterogeneous environments and various stress factors during their secondary phase of invasion into more stressful habitats. A high tolerance to stress factors may allow exotics to successfully invade stressful environments. Ipomoea cairica, a vigorous invader in South China, has recently been expanding into salt marshes.To examine why this liana species is able to invade a stressful saline environment, we utilized I. cairica and 3 non-invasive species for a greenhouse experiment. The plants were subjected to three levels of salinity (i.e., watered with 0, 4 and 8 g L(-1 NaCl solutions and simulated herbivory (0, 25 and 50% of the leaf area excised treatments. The relative growth rate (RGR of I. cairica was significantly higher than the RGR of non-invasive species under both stress treatments. The growth performance of I. cairica was not significantly affected by either stress factor, while that of the non-invasive species was significantly inhibited. The leaf condensed tannin content was generally lower in I. cairica than in the non-invasive I. triloba and Paederia foetida. Ipomoea cairica exhibited a relatively low resistance to herbivory, however, its tolerance to stress factors was significantly higher than either of the non-invasive species.This is the first study examining the expansion of I. cairica to salt marshes in its introduced range. Our results suggest that the high tolerance of I. cairica to key stress factors (e.g., salinity and herbivory contributes to its invasion into salt marshes. For I. cairica, a trade-off in resource reallocation may allow increased resources to be allocated to tolerance and growth. This may contribute to a secondary invasion into stressful habitats. Finally, we suggest that I. cairica could spread further and successfully occupy salt marshes, and countermeasures based on herbivory could be ineffective for controlling this invasion.

  10. Minerals in the foods and diet of diademed sifakas: Are they nutritional challenges?

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    Irwin, Mitchell T; Raharison, Jean-Luc; Chapman, Colin A; Junge, Randall E; Rothman, Jessica M

    2017-04-01

    Minerals, though needed in small quantities, are essential to metabolic processes, and deficiencies can seriously threaten health, reproduction and survival. Despite this, few studies have measured mineral composition of wild primate foods and fewer have quantified mineral intake. Here we measured the concentration of nine minerals in 75 foods of diademed sifakas (Propithecus diadema; five groups) in habitats with varying levels of disturbance at Tsinjoarivo and estimated daily intakes using focal-animal feeding data and intake rates over one year. For six minerals (Ca, P, Na, Fe, Zn, and Cu), mean concentrations in foods fell short of the National Research Council's (NRC) recommendations for captive primates. Concentrations were highest in lianas, herbs, and epiphytes, and hemiparasites had exceptionally high Na. Leaves tended to have higher concentrations than fruits or flowers, but overlap was extensive. Mineral concentrations in daily diets varied little seasonally, but absolute intakes (g/day) were higher in the abundant season, due to the increase in food ingested. Disturbed habitat groups' diets had higher mineral concentrations for five minerals, but this translated into increased intakes only for Cu, as these groups ate less food overall. Overall, comparisons with percentage-based NRC recommendations suggests deficiencies, but this is contradicted by: (1) the fact that mass-specific intakes exceeded human recommendations, and (2) the lack of observed signs of deficiency. Ongoing efforts to quantify mineral consumption across wild primate populations and better understanding requirements on both a percentage and absolute basis will help in understanding effects on food selection, managing primate habitats and formulating captive diets. © 2017 Wiley Periodicals, Inc.

  11. Practice makes perfect: Performance optimisation in 'arboreal' parkour athletes illuminates the evolutionary ecology of great ape anatomy.

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    Halsey, Lewis G; Coward, Samuel R L; Crompton, Robin H; Thorpe, Susannah K S

    2017-02-01

    An animal's size is central to its ecology, yet remarkably little is known about the selective pressures that drive this trait. A particularly compelling example is how ancestral apes evolved large body mass in such a physically and energetically challenging environment as the forest canopy, where weight-bearing branches and lianas are flexible, irregular and discontinuous, and the majority of preferred foods are situated on the most flexible branches at the periphery of tree crowns. To date the issue has been intractable due to a lack of relevant fossil material, the limited capacity of the fossil record to reconstruct an animal's behavioural ecology and the inability to measure energy consumption in freely moving apes. We studied the oxygen consumption of parkour athletes while they traversed an arboreal-like course as an elite model ape, to test the ecomorphological and behavioural mechanisms by which a large-bodied ape could optimize its energetic performance during tree-based locomotion. Our results show that familiarity with the arboreal-like course allowed the athletes to substantially reduce their energy expenditure. Furthermore, athletes with larger arm spans and shorter legs were particularly adept at finding energetic savings. Our results flesh out the scanty fossil record to offer evidence that long, strong arms, broad chests and a strong axial system, combined with the frequent use of uniform branch-to-branch arboreal pathways, were critical to off-setting the mechanical and energetic demands of large mass in ancestral apes. Crown Copyright © 2016. Published by Elsevier Ltd. All rights reserved.

  12. Estrutura de um cerrado strico sensu na Gleba Cerrado Pé-de-Gigante, Santa Rita do Passa Quatro, SP

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    Fidelis Alessandra Tomaselli

    2003-01-01

    Full Text Available O Cerrado ocupa aproximadamente 23% do território brasileiro e 70% do bioma correspondem a cerrado stricto sensu (s.s., sendo relevantes os estudos que buscam o entendimento da estrutura da vegetação nessas áreas. Com esse objetivo, foram estudadas cinco parcelas (10×25m em um hectare de cerrado s.s., amostrando-se todos os indivíduos com perímetro no nível do solo igual ou acima de 3cm (exceto lianas e indivíduos mortos. Alguns parâmetros fitossociológicos foram analisados, assim como a distribuição de classes de diâmetro dos indivíduos amostrados e a estrutura vertical. Foram amostradas 1.747 indivíduos, distribuídos em 75 espécies, pertencentes a 31 famílias. A densidade total absoluta encontrada foi de 13.976 ind.ha-1 e a área basal total, de 4,902m². Leguminosae foi a família com o maior número de espécies (16. As espécies que apresentaram os maiores valores de Índice do Valor de Importância (IVI foram Anadenanthera falcata (Benth. Altschul, Myrcia guianensis (Aubl. DC., Xylopia aromatica (Lm. Mart., Ouratea spectabilis (Mart. Engl. e Pouteria ramiflora (Mart. Radlk. O Índice de Shannon encontrado foi de 3,623. A distribuição de classes de diâmetro apresentou curva na forma de "J" invertido, estando a maioria dos indivíduos na primeira classe. A área estudada não apresentou estratos bem definidos, estando a maioria dos indivíduos entre 1 e 3m de altura.

  13. Rainforests north of the Tropic of Cancer: Physiognomy, floristics and diversity in ‘lowland rainforests’ of Meghalaya, India

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    Uma Shankar

    2017-02-01

    Full Text Available The lowland rainforests of Meghalaya, India represent the westernmost limit of the rainforests north of the Tropic of Cancer. These forests, on the Shillong plateau, are akin to Whitmore's ‘tropical lowland evergreen rainforest’ formation and exhibit striking similarities and conspicuous differences with the equatorial rainforests in Asia-Pacific as well as tropical seasonal rainforests in southwestern China near the Tropic of Cancer. We found these common attributes of the rainforests in Meghalaya: familial composition with predominance of Euphorbiaceae, Lauraceae, Meliaceae, Moraceae, Myrsiticaceae, Myrtaceae and Rubiaceae; deciduousness in evergreen physiognomy; dominance of mega- and mesophanerophytic life-forms; abundance of species with low frequency of occurrence (rare and aggregated species; low proportional abundance of the abundant species; and truncated lognormal abundance distribution. The levels of stand density and stand basal area were comparable with seasonal rainforests in southwestern China, but were lower than equatorial rainforests. Tropical Asian species predominated flora, commanding 95% of the abundance. The differences include overall low stature (height of the forest, inconspicuous stratification in canopy, fewer species and individuals of liana, thicker understory, higher proportion of rare species, absence of locally endemic species and relatively greater dominance of Fagaceae and Theaceae. The richness of species per hectare (S was considerably lower at higher latitudes in Meghalaya than in equatorial rainforests, but was comparable with seasonal rainforests. Shannon's diversity index (H′ = 4.40 nats for ≥10 cm gbh and 4.25 nats for ≥30 cm gbh was lower on higher latitudes in Meghalaya in comparison to species-rich equatorial rainforests, but it was the highest among all lowland rainforests near the Tropic of Cancer.

  14. Identificación y clasificación en biotipos de las malezas asociadas con el cultivo de la palma de aceite

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    Carlos Andrés Ariza

    2012-07-01

    Full Text Available En dos plantaciones de palma de aceite, ubicadas en los municipios de Villanueva, Casanare, y Barranca de Upía, Meta, (Colombia, zona del Bajo Upía, se realizó un reconocimiento y clasificación en biotipos de las malezas asociadas con la palma de aceite. Para realizar el trabajo se visitaron las dos fincas, y se procedió a recoger muestras y fotografiar las malezas que se encontraban dentro del cultivo, así como en su contorno. La identificación y descripción se realizó siguiendo la metodología binaria latina expuesta por Linneo y especificada en el Código Internacional de Nomenclatura Botánica, reportada para las especies reconocidas, mediante los servicios del herbario de la Universidad Pedagógica y Tecnológica de Colombia, y referencias de autores como Doll et al. (1972, Lemus y Lemus (2004, Rentería et al. (2006, Blair y Madrigal (2005, Fuentes et al. (1998, Kress et al. (2004, Becerra y Chaparro (1999 y Genty (1993. Para la agrupación de las malezas en biotipos (lianas, herbáceas, arbustos y árboles se tuvieron en cuenta sus características morfológicas. Se encontraron en  total 195 especies de malezas asociadas con el cultivo de la palma de aceite, 145 dicotiledóneas y 50 monocotiledóneas, pertenecientes a 43 familias.

  15. The roots of diversity: below ground species richness and rooting distributions in a tropical forest revealed by DNA barcodes and inverse modeling.

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    F Andrew Jones

    Full Text Available Plants interact with each other, nutrients, and microbial communities in soils through extensive root networks. Understanding these below ground interactions has been difficult in natural systems, particularly those with high plant species diversity where morphological identification of fine roots is difficult. We combine DNA-based root identification with a DNA barcode database and above ground stem locations in a floristically diverse lowland tropical wet forest on Barro Colorado Island, Panama, where all trees and lianas >1 cm diameter have been mapped to investigate richness patterns below ground and model rooting distributions.DNA barcode loci, particularly the cpDNA locus trnH-psba, can be used to identify fine and small coarse roots to species. We recovered 33 species of roots from 117 fragments sequenced from 12 soil cores. Despite limited sampling, we recovered a high proportion of the known species in the focal hectare, representing approximately 14% of the measured woody plant richness. This high value is emphasized by the fact that we would need to sample on average 13 m(2 at the seedling layer and 45 m(2 for woody plants >1 cm diameter to obtain the same number of species above ground. Results from inverse models parameterized with the locations and sizes of adults and the species identifications of roots and sampling locations indicates a high potential for distal underground interactions among plants.DNA barcoding techniques coupled with modeling approaches should be broadly applicable to studying root distributions in any mapped vegetation plot. We discuss the implications of our results and outline how second-generation sequencing technology and environmental sampling can be combined to increase our understanding of how root distributions influence the potential for plant interactions in natural ecosystems.

  16. Danos provocados pelo fogo sobre a vegetação natural em uma floresta primária no estado do Acre, amazônia brasileira

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    Henrique José Borges de Araujo

    2013-01-01

    Full Text Available The emission of CO2 is an important cause of the greenhouse effect and the Amazonian burns contribute to it. Because of the high moisture retained, the primary Amazon forest is considered immune to fire, however, under abnormal climate conditions it is vulnerable. The objective of this study is to evaluate the effects of fire, originated from forest-fires occurred in 2005, in a natural primary forest in the state of Acre, Brazilian Amazon region. The effects of fire on trees, palm trees and lianas were evaluated in three levels of size: I-DBH≥5 cm; II-5 cm>DBH≥2 cm; and III-DBH<2 cm and height ≥1,0 m. The individuals were evaluated for General Condition (levels I and II, Bark and Cup (Level I and budding. Five evaluations were made, the first in November 2005 and last in January 2009. The results showed that the smallest subjects were the most impacted ones and showed the highest mortality rates, reaching 80.1 % for Level II and decreasing according to the increasing size of the tree and it is null (0 % in higher classes. It was observed a growing number of individuals with no apparent damage in all diameter classes and a 43 % increase in the number of species in regeneration, indicating a recovery process of the forest. It was observed a significant reduction of species diversity (15 % in Level I and 33 % in Level II, showing that the forest was modified in its floristic composition. Based on the significant damage caused by only one fire, the case of study, it is expected the incidence of new fires, at short intervals insufficient for the recovery and it will promote the irremediable degeneration of forest.

  17. Climate niches of milkweeds with plesiomorphic traits (Secamonoideae; Apocynaceae) and the milkweed sister group link ancient African climates and floral evolution.

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    Livshultz, Tatyana; Mead, Jerry V; Goyder, David J; Brannin, Michelle

    2011-12-01

    Climate change that increases mortality of plants and pollinators can create mate-finding Allee effects and thus act as a strong selective force on floral morphology. Milkweeds (Secamonoideae and Asclepiadoideae; Apocynaceae) are typically small plants of seasonally dry habitats, with pollinia and high pollen-transfer efficiency. Their sister group (tribe Baisseeae and Dewevrella) is mostly comprised of giant lianas of African rainforests, with pollen in monads. Comparison of the two groups motivated a new hypothesis: milkweeds evolved in the context of African aridification and the shifting of rainforest to dry forest. Pollinia and high pollen-transfer efficiency may have been adaptations that alleviated mate-finding Allee effects generated by high mortality during droughts. We formally tested whether milkweeds have a drier climate niche by comparing milkweeds with plesiomorphic traits (Secamonoideae) and the milkweed sister group in continental Africa. We georeferenced specimens of the milkweed sister group and Secamonoideae in continental Africa, extracted 19 climatic variables from the Worldclim model, conducted factor analysis to identify correlated suites of variables, and compared the frequency distributions of the two lineages relative to each factor. The distributions of Secamonoideae and the milkweed sister group differed significantly relative to four factors, each correlated with a distinct suite of climate parameters: (1) air temperature (Secamonoideae: cooler), (2) total and (3) summer precipitation (Secamonoideae: drier), and (4) temperature seasonality and isothermality (Secamonoideae: more seasonal and less isothermal). Secamonoideae in continental Africa inhabit drier, cooler sites than do the milkweed sister group, consistent with a shift from rainforests to dry forests in a cooling climate.

  18. General patterns of acclimation of leaf respiration to elevated temperatures across biomes and plant types.

    Science.gov (United States)

    Slot, Martijn; Kitajima, Kaoru

    2015-03-01

    Respiration is instrumental for survival and growth of plants, but increasing costs of maintenance processes with warming have the potential to change the balance between photosynthetic carbon uptake and respiratory carbon release from leaves. Climate warming may cause substantial increases of leaf respiratory carbon fluxes, which would further impact the carbon balance of terrestrial vegetation. However, downregulation of respiratory physiology via thermal acclimation may mitigate this impact. We have conducted a meta-analysis with data collected from 43 independent studies to assess quantitatively the thermal acclimation capacity of leaf dark respiration to warming of terrestrial plant species from across the globe. In total, 282 temperature contrasts were included in the meta-analysis, representing 103 species of forbs, graminoids, shrubs, trees and lianas native to arctic, boreal, temperate and tropical ecosystems. Acclimation to warming was found to decrease respiration at a set temperature in the majority of the observations, regardless of the biome of origin and growth form, but respiration was not completely homeostatic across temperatures in the majority of cases. Leaves that developed at a new temperature had a greater capacity for acclimation than those transferred to a new temperature. We conclude that leaf respiration of most terrestrial plants can acclimate to gradual warming, potentially reducing the magnitude of the positive feedback between climate and the carbon cycle in a warming world. More empirical data are, however, needed to improve our understanding of interspecific variation in thermal acclimation capacity, and to better predict patterns in respiratory carbon fluxes both within and across biomes in the face of ongoing global warming.

  19. Biodiversity and functional regeneration during secondary succession in a tropical dry forest: from microorganisms to mammals

    Science.gov (United States)

    do Espírito Santo, M. M.; Neves, F. S.; Valério, H. M.; Leite, L. O.; Falcão, L. A.; Borges, M.; Beirão, M.; Reis, R., Jr.; Berbara, R.; Nunes, Y. R.; Silva, A.; Silva, L. F.; Siqueira, P. R.

    2015-12-01

    In this study, we aimed to determine the changes on soil traits, forest structure and species richness and composition of multiple groups of organisms along secondary succession in a tropical dry forest (TDF) in southeastern Brazil. We defined three successional stages based in forest vertical and horizontal structure and age: early (18-25 years), intermediate (50-60 years) and late (no records of clearing). Five plots of 50 x 20 m were established per stage, and the following groups were sampled using specific techniques: rhizobacteria, mycorrhiza, trees and lianas, butterflies, ants, dung beetles, mosquitoes (Culicidae), birds and bats. We also determined soil chemical and physical characteristics and forest structure (tree height, density and basal area). Soil fertility increased along the successional gradient, and the same pattern was observed for all the forest structure variables. However, species richness and composition showed mixed results depending on the organism group. Three groups usually considered as good bioindicators of habitat quality did not differ in species richness and composition between stages: butterflies, ants and dung beetles. On the other hand, rizhobacteria and mycorrhiza differed both in species richness and composition between stages and may be more sensitive to changes in environmental conditions in TDFs. The other five groups differed either in species richness or composition between one or two pairs of successional stages. Although changes in abiotic conditions and forest structure match the predictions of classical successional models, the response of each group of organism is idiosyncratic in terms of diversity and ecological function, as a consequence of specific resource requirements and life-history traits. In general, diversity increased and functional groups changed mostly from early to intermediate-late stages, strengthening the importance of secondary forests to the maintenance of ecosystem integrity of TDFs.

  20. Effects of hurricanes and climate oscillations on annual variation in reproduction in wet forest, Puerto Rico.

    Science.gov (United States)

    Zimmerman, Jess K; Hogan, J Aaron; Nytch, Christopher J; Bithorn, John E

    2018-04-06

    Interannual changes in global climate and weather disturbances may influence reproduction in tropical forests. Phenomena such as the El Niño Southern Oscillation (ENSO) are known to produce interannual variation in reproduction, as do severe storms such as hurricanes. Using stationary trap-based phenology data collected fortnightly from 1993 to 2014 from a hurricane-affected (1989 Hugo, 1998 Georges) subtropical wet forest in northeastern Puerto Rico, we conducted a time series analysis of flowering and seed production. We addressed 1) the degree to which interannual variation in flower and seed production was influenced by global climate drivers and time since hurricane disturbance, and 2) how long-term trends in reproduction varied with plant lifeform. The seasonally de-trended number of species in flower fluctuated over time while the number of species producing seed exhibited a declining trend, one that was particularly evident during the second half of the study period. Lagged El Niño indices and time series hurricane disturbance jointly influenced the trends in numbers of flowering and fruiting species, suggesting complex global influences on tropical forest reproduction with variable periodicities. Lag times affecting flowering tended to be longer than those affecting fruiting. Long-term patterns of reproduction in individual lifeforms paralleled the community-wide patterns, with most groups of lifeform exhibiting a long-term decline in seed but not flower production. Exceptions were found for hemiepiphytes, small trees, and lianas whose seed reproduction increased and then declined over time. There was no long-term increase in flower production as reported in other Neotropical sites. This article is protected by copyright. All rights reserved. This article is protected by copyright. All rights reserved.

  1. Pharmacological effects of mitraphylline from Uncaria tomentosa in primary human monocytes: Skew toward M2 macrophages.

    Science.gov (United States)

    Montserrat-de la Paz, S; de la Puerta, R; Fernandez-Arche, A; Quilez, A M; Muriana, F J G; Garcia-Gimenez, M D; Bermudez, B

    2015-07-21

    Uncaria tomentosa (Willdenow ex Roemer & Schultes) DC. (Rubiaceae) is a Peruvian thorny liana, commonly known as "cat׳s claw", and traditionally used in folk medicine to deal with several inflammatory diseases. Mitraphylline (MTP) is the most abundant pentacyclic oxindolic alkaloid (POA) from U. Tomentosa and has been reported to modify the inflammatory response. Herein, we have sought to identify the mechanisms underlying this modulatory effect of MTP on primary human monocytes and its ability to regulate differentiation processes on human primary monocyte and monocyte-derived macrophages. In vitro studies with human primary monocytes and monocyte-derived macrophages were performed. Monocytes and M0 macrophages were exposed to MTP (25μM) and LPS (100ng/mL). M0 macrophages were polarized to M1 and M2 phenotypes in the absence or presence of MTP. The activation state of monocytes/macrophages was assessed by flow cytometry, gene expression and protein analysis of different specific markers. In human primary monocytes, the incubation of MTP for 24h reduced the number of classical (CD14(++)CD16(-)) and intermediate (CD14(++)CD16(+)) subsets when compared to untreated or LPS-treated cells. MTP also reduced the chemotactic capacity of human primary monocytes. In addition, MTP promoted the polarization of M0 macrophages toward an anti-inflammatory M2 phenotype, the abrogation of the release of pro-inflammatory cytokines such as TNFα, IL-6 or IL-1β, as well as the restoration of markers for M2 macrophages in LPS-treated M1 macrophages. Our results suggest that MTP may be a key modulator for regulating the plasticity of monocytes/macrophages and the attenuation of the inflammatory response. Copyright © 2015 Elsevier Ireland Ltd. All rights reserved.

  2. Taphonomy of plants in a paratropical fluvial system

    Energy Technology Data Exchange (ETDEWEB)

    Burnham, R.J.

    1986-05-01

    Investigation of the subenvironments of a modern paratropical fluvial system in southern Mexico indicates that certain depositional settings are relatively accurate in representing the local flora. Epiphytes, lianas, and those woody plants that are a small fraction of the standing biomass occur in sediments in approximate proportion to their representation (number of individuals) in the vegetation. A paleoenvironmental reconstruction of the flood plain as a whole can be made from the plants preserved when all subenvironments provide conditions for fossilization and when plant parts from each environment are retrieved in large quantities. However, discrepancies arise in reconstruction from the preservational qualities of distinct subenvironments and from differences in plant species composition among the subenvironments. For example, sites at a channel margin provide ideal preservational potential, but the plants preserved are low in specific diversity relative to the flood-plain forest, reflecting only those plants that live at the edge of the water. Important sedimentologic differences also exist among subenvironments of a fluvial system. A combination of potential plant-macrofossil and sedimentologic indicators can be used to characterize the subenvironments most likely to preserve plants. Ancient fluvial and upper deltaic sediments in Washington state have been investigated for fossil macrofloras and sedimentary structures. Subenvironments have been characterized based on the diversity and taxonomic composition of the preserved floras as well as on sedimentological criteria. The Eocene sediments support the hypothesis that within a fluvial system, dramatic floristic differences exist among subenvironments. Paleoecologic and evolutionary reconstructions can be improved with knowledge of the probable taphonomic biases of each depositional site.

  3. Energy determines broad pattern of plant distribution in Western Himalaya.

    Science.gov (United States)

    Panda, Rajendra M; Behera, Mukunda Dev; Roy, Partha S; Biradar, Chandrashekhar

    2017-12-01

    Several factors describe the broad pattern of diversity in plant species distribution. We explore these determinants of species richness in Western Himalayas using high-resolution species data available for the area to energy, water, physiography and anthropogenic disturbance. The floral data involves 1279 species from 1178 spatial locations and 738 sample plots of a national database. We evaluated their correlation with 8-environmental variables, selected on the basis of correlation coefficients and principal component loadings, using both linear (structural equation model) and nonlinear (generalised additive model) techniques. There were 645 genera and 176 families including 815 herbs, 213 shrubs, 190 trees, and 61 lianas. The nonlinear model explained the maximum deviance of 67.4% and showed the dominant contribution of climate on species richness with a 59% share. Energy variables (potential evapotranspiration and temperature seasonality) explained the deviance better than did water variables (aridity index and precipitation of the driest quarter). Temperature seasonality had the maximum impact on the species richness. The structural equation model confirmed the results of the nonlinear model but less efficiently. The mutual influences of the climatic variables were found to affect the predictions of the model significantly. To our knowledge, the 67.4% deviance found in the species richness pattern is one of the highest values reported in mountain studies. Broadly, climate described by water-energy dynamics provides the best explanation for the species richness pattern. Both modeling approaches supported the same conclusion that energy is the best predictor of species richness. The dry and cold conditions of the region account for the dominant contribution of energy on species richness.

  4. Woodiness within the Spermacoceae–Knoxieae alliance (Rubiaceae): retention of the basal woody condition in Rubiaceae or recent innovation?

    Science.gov (United States)

    Lens, Frederic; Groeninckx, Inge; Smets, Erik; Dessein, Steven

    2009-01-01

    Background and Aims The tribe Spermacoceae is essentially a herbaceous Rubiaceae lineage, except for some species that can be described as ‘woody’ herbs, small shrubs to treelets, or lianas. Its sister tribe Knoxieae contains a large number of herbaceous taxa, but the number of woody taxa is higher compared to Spermacoceae. The occurrence of herbaceous and woody species within the same group raises the question whether the woody taxa are derived from herbaceous taxa (i.e. secondary woodiness), or whether woodiness represents the ancestral state (i.e. primary woodiness). Microscopic observations of wood anatomy are combined with an independent molecular phylogeny to answer this question. Methods Observations of wood anatomy of 21 woody Spermacoceae and eight woody Knoxieae species, most of them included in a multi-gene molecular phylogeny, are carried out using light microscopy. Key Results Observations of wood anatomy in Spermacoceae support the molecular hypothesis that all the woody species examined are secondary derived. Well-known wood anatomical characters that demonstrate this shift from the herbaceous to the woody habit are the typically flat or decreasing length vs. age curves for vessel elements, the abundance of square and upright ray cells, or even the (near-) absence of rays. These so-called paedomorphic wood features are also present in the Knoxieae genera Otiophora, Otomeria, Pentas, Pentanisia and Phyllopentas. However, the wood structure of the other Knoxieae genera observed (Carphalea, Dirichletia and Triainolepis) is typical of primarily woody taxa. Conclusions In Spermacoceae, secondary woodiness has evolved numerous times in strikingly different habitats. In Knoxieae, there is a general trend from primary woodiness towards herbaceousness and back to (secondary) woodiness. PMID:19279041

  5. Floristic indicators of tropical landuse systems: Evidence from mining areas in Southwestern Nigeria

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    Sehinde Akinbiola

    2016-07-01

    Full Text Available Most forests in the tropics have not only been reduced in size but have also experienced forest degradation. The delicate balance of the components of the forest ecosystem has been altered largely by the landuse systems which have resulted in the disappearance of some species and the introduction of new ones. In order to understand the influence of human disturbance caused by artisanal mining on plant biodiversity and the physical environment, this study assessed changes in vegetation characteristics using plant functional groups, such as invasive, pioneer and understory species. The study was conducted at two sites in two Southwestern states of Nigeria, Itagunmodi in Atakumosa West Local Government Area of Osun State and Olode in Oluyole Local Government Area of Oyo State. Complete enumerations of woody, non-woody and herbaceous plant species were carried out in 20 m by 20 m plots selected using stratified random sampling as representative of landuse classes: freshly mined (6 months and a control plot (secondary forest. The results showed that the control plot in Itagunmodi had undergone degradation as indicated by the presence of Alchornea laxiflora, Geophilia obvallata, Musa sapientum,Elaeis guineensis and Keetia hispida. However, if left undisturbed, it has the potential of regeneration back to its original state because of its woody tree species composition and lianas (Triclisia gilletii. In addition the forest soils in the mines had been exposed to direct insolation for a long period, and the soil structure and texture have been affected, consequently altering the viability of the seed bank. Poaceae and Papilionoideae were the most common in the freshly mined plots while invasive species were the most common in abandoned mined plots. In conclusion, the floristic composition in the mining sites has been altered and there was no clear evidence that regrowth would bring restoration of the lost ecosystem services.

  6. Plant diversity changes during the postglacial in East Asia: insights from Forest Refugia on Halla Volcano, Jeju Island.

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    Jiri Dolezal

    Full Text Available Understanding how past climate changes affected biodiversity is a key issue in contemporary ecology and conservation biology. These diversity changes are, however, difficult to reconstruct from paleoecological sources alone, because macrofossil and pollen records do not provide complete information about species assemblages. Ecologists therefore use information from modern analogues of past communities in order to get a better understanding of past diversity changes. Here we compare plant diversity, species traits and environment between late-glacial Abies, early-Holocene Quercus, and mid-Holocene warm-temperate Carpinus forest refugia on Jeju Island, Korea in order to provide insights into postglacial changes associated with their replacement. Based on detailed study of relict communities, we propose that the late-glacial open-canopy conifer forests in southern part of Korean Peninsula were rich in vascular plants, in particular of heliophilous herbs, whose dramatic decline was caused by the early Holocene invasion of dwarf bamboo into the understory of Quercus forests, followed by mid-Holocene expansion of strongly shading trees such as maple and hornbeam. This diversity loss was partly compensated in the Carpinus forests by an increase in shade-tolerant evergreen trees, shrubs and lianas. However, the pool of these species is much smaller than that of light-demanding herbs, and hence the total species richness is lower, both locally and in the whole area of the Carpinus and Quercus forests. The strongly shading tree species dominating in the hornbeam forests have higher leaf tissue N and P concentrations and smaller leaf dry matter content, which enhances litter decomposition and nutrient cycling and in turn favored the selection of highly competitive species in the shrub layer. This further reduced available light and caused almost complete disappearance of understory herbs, including dwarf bamboo.

  7. Biodiversidad florística del Jardín Botánico de la Universidad Nacional de Ucayali

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    Víctor Araujo Abanto

    2015-12-01

    Full Text Available El objetivo fue la clasificación taxonómica y descripciones botánicas de 36 especies (23 familias y 33 géneros, árboles, arbustos, lianas y hierbas en el Jardín Botánico y Campus de la Universidad Nacional de Ucayali. De las 36 especies, 6 son ornamentales: Sanchezia tigrina, Crinum augustum, Sansevieria trifasciata, Dracaena fragans, Costus guanaiensis y Vitex cymosa; Rhynchosia phaseoloides cuyas semillas son cotizadas como artesanal; 7 podrían tener uso ornamental: Tabernaemontana heteropylla, Sparattosperma leucanthum, Cayaponia ophthalmica, Gurania eriantha, Gurania spinulosa, Stigmaphyllon florosum y Capirona decorticans; 3 son medicinales: Euphorbia umbellata (tratamiento del cáncer y otros males, Uncaria guianensis (refuerza el sistema inmunológico y Pilocarpus peruvianus contiene Pilocarpina de uso oftalmológico; Pourouma guianensis tiene fuerte olor a mentol; 3 con frutos alimenticios Tamarindus indica, Bunchosia armeniaca y Physalis angulata, conteniendo este último alto contenido en pro vitamina A; 10 son maderables: Dipteryx odorata, Vitex cymosa, Tectona grandis, Ocotea bofo, Perebea xanthochyma, Virola pavonis, Calycophyllum spruceanum, Capirona decorticans, Guazuma ulmifolia y Bambusa arundinacea; Pueraria phaseoloides usado como forraje, en el Jardín Botánico está como maleza al igual que Davilla nítida y Urena lobata, que podría servir como ornamental, su corteza tiene propiedades similares al yute verdadero; Cecropia membranácea, C. concolor, C. sciadophylla y Gouania lupuloides que pueden servir como alimento de la fauna silvestre.

  8. Phylogenetic signal detection from an ancient rapid radiation: Effects of noise reduction, long-branch attraction, and model selection in crown clade Apocynaceae.

    Science.gov (United States)

    Straub, Shannon C K; Moore, Michael J; Soltis, Pamela S; Soltis, Douglas E; Liston, Aaron; Livshultz, Tatyana

    2014-11-01

    Crown clade Apocynaceae comprise seven primary lineages of lianas, shrubs, and herbs with a diversity of pollen aggregation morphologies including monads, tetrads, and pollinia, making them an ideal group for investigating the evolution and function of pollen packaging. Traditional molecular systematic approaches utilizing small amounts of sequence data have failed to resolve relationships along the spine of the crown clade, a likely ancient rapid radiation. The previous best estimate of the phylogeny was a five-way polytomy, leaving ambiguous the homology of aggregated pollen in two major lineages, the Periplocoideae, which possess pollen tetrads, and the milkweeds (Secamonoideae plus Asclepiadoideae), which possess pollinia. To assess whether greatly increased character sampling would resolve these relationships, a plastome sequence data matrix was assembled for 13 taxa of Apocynaceae, including nine newly generated complete plastomes, one partial new plastome, and three previously reported plastomes, collectively representing all primary crown clade lineages and outgroups. The effects of phylogenetic noise, long-branch attraction, and model selection (linked versus unlinked branch lengths among data partitions) were evaluated in a hypothesis-testing framework based on Shimodaira-Hasegawa tests. Discrimination among alternative crown clade resolutions was affected by all three factors. Exclusion of the noisiest alignment positions and topologies influenced by long-branch attraction resulted in a trichotomy along the spine of the crown clade consisting of Rhabdadenia+the Asian clade, Baisseeae+milkweeds, and Periplocoideae+the New World clade. Parsimony reconstruction on all optimal topologies after noise exclusion unambiguously supports parallel evolution of aggregated pollen in Periplocoideae (tetrads) and milkweeds (pollinia). Our phylogenomic approach has greatly advanced the resolution of one of the most perplexing radiations in Apocynaceae, providing the

  9. Succession of Ephemeral Secondary Forests and Their Limited Role for the Conservation of Floristic Diversity in a Human-Modified Tropical Landscape

    Science.gov (United States)

    van Breugel, Michiel; Hall, Jefferson S.; Craven, Dylan; Bailon, Mario; Hernandez, Andres; Abbene, Michele; van Breugel, Paulo

    2013-01-01

    Both local- and landscape-scale processes drive succession of secondary forests in human-modified tropical landscapes. Nonetheless, until recently successional changes in composition and diversity have been predominantly studied at the patch level. Here, we used a unique dataset with 45 randomly selected sites across a mixed-use tropical landscape in central Panama to study forest succession simultaneously on local and landscape scales and across both life stages (seedling, sapling, juvenile and adult trees) and life forms (shrubs, trees, lianas, and palms). To understand the potential of these secondary forests to conserve tree species diversity, we also evaluated the diversity of species that can persist as viable metapopulations in a dynamic patchwork of short-lived successional forests, using different assumptions about the average relative size at reproductive maturity. We found a deterministic shift in the diversity and composition of the local plant communities as well as the metacommunity, driven by variation in the rate at which species recruited into and disappeared from the secondary forests across the landscape. Our results indicate that dispersal limitation and the successional niche operate simultaneously and shape successional dynamics of the metacommunity of these early secondary forests. A high diversity of plant species across the metacommunity of early secondary forests shows a potential for restoration of diverse forests through natural succession, when trees and fragments of older forests are maintained in the agricultural matrix and land is abandoned or set aside for a long period of time. On the other hand, during the first 32 years the number of species with mature-sized individuals was a relatively small and strongly biased sub-sample of the total species pool. This implies that ephemeral secondary forests have a limited role in the long-term conservation of tree species diversity in human-modified tropical landscapes. PMID:24349283

  10. Evaluation of gastroprotective activity of Passiflora alata

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    André Wasicky

    Full Text Available AbstractPassiflora alata Curtis, Passifloraceae, is a liana popularly known in Brazil as ‘maracujá-doce’ that has been used for treating different illnesses. Its leaves are described in the Brazilian Pharmacopoeia, but the gastroprotective activity has never been investigated. In the present study a freeze-dried crude 60% ethanol–water extract of P. alata aerial parts was prepared. Total flavonoid content, expressed as vitexin, was 0.67% ± 0.01. The hemolytic activity was 32 units for P. alata, using Saponin (Merck® as reference. P. alata presented EC50 of 1061.2 ± 8.5 µg/ml in the 2,2-diphenyl-1-picryhydrazyl assay and 1076 ± 85 µmol Trolox/g in the Oxygen Radical Absorbance Capacity assay. P. alata, its solvent fractions and a P. alatananopreparation were investigated for gastroprotective activity. The test samples exhibited gastroprotective activity on HCl/ethanol induced gastric mucosal lesions in rats. P. alata at doses of 100, 200 and 400 mg/kg, using the necrotizing agent at 150 mmol/l, inhibited 100% of ulcer formation (compared to the negative control, while lansoprazole (30 mg/kg 77%. When tested against a more concentrated necrotizing agent (300 mmol/l, fractions of P. alata at 100 mg/kg reduced 57% (n-hexane, 34% (ethyl acetate and 72% (aqueous fraction the ulcer formation. In this assay, lansoprazole (30 mg/kg inhibited 47%. When encapsulated, P. alata inhibited ulcer formation at 55%, 94% and 90% for dosages of 25, 50 and 100 mg/kg. These results suggest the potential use of P. alata as a gastroprotective herbal medicine.

  11. Establecimiento in vitro y cultivo de células de la uña de gato (Uncaria tomentosa (Willd. D.C.

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    Silvana Alvarenga Venutolo

    2010-12-01

    Full Text Available La Uncaria tomentosa (Willd. D.C., (uñade gato es una liana del bosque tropical,que se distribuye en forma natural en lazona Atlántica de Costa Rica, a alturasmenores de 600 msnm. La infusión dela corteza de la raíz forma parte delacervo de la medicina tradicional deCosta Rica para aliviar diversas dolencias,como son: la gastritis, la artritis; además,funciona como fortificante del sistemainmunológico y, recientemente, para tratarel cáncer y el VIH.El cultivo in vitro sedesarrolló como una herramienta para lamicropropagación de plantas en la zonade Guápiles (Pococí, como estrategiade conservación para la explotacióncomercial sostenible de la especie. En esteartículo se describen los protocolos para elestablecimiento y la micropropagación apartir de microestacas, en un medio M & S(1962 con 2 mg/L de BA, 3% de sacarosay 7 g/L de agar; así como la germinaciónin vitro en el mismo medio M & S (1962semi sólido (1,8 g/L de Phyta-Gel.Se probó el cultivo en medio líquido, en jarrasfermentadoras y en sistemas de inmersióntemporal automatizado (RITA®, y fueefectivo el método de inmersión cada treshoras, durante tres minutos. Se describe elproceso de aclimatación, el crecimiento ydesarrollo de las vitroplantas.

  12. Germinación y dormancia de arbustos y trepadoras del bosque siempreverde de la Sierra del Rosario, Cuba

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    J. A Sánchez

    Full Text Available Se determinaron los requerimientos germinativos y las clases de dormancia seminal en 14 especies de arbustos y 16 trepadoras (13 enredaderas y tres lianas, del bosque siempreverde estacional tropical de la Reserva de la Biosfera Sierra del Rosario, Cuba. También se evaluaron las relaciones entre las clases de dormancia y otros rasgos de historia de vida de las plantas. Los experimentos de germinación se realizaron en condiciones controladas de laboratorio (luz y temperatura: una temperatura constante de 25 ºC, tres condiciones de temperatura alterna (25/30 ºC, 25/35 ºC y 25/40 ºC y dos ambientes lumínicos (luz y oscuridad. En los arbustos, la luz fue el principal factor que reguló la germinación; mientras que en las trepadoras los factores experimentados no afectaron significativamente la germinación en su totalidad, aunque algunas tuvieron una respuesta especie-específica. Solo dos especies fueron totalmente fotoblásticas positivas, y la germinación a la luz disminuyó con la masa fresca de la semilla. La dormancia ocurrió en 23 especies (76,6 %, de ellas 10 eran arbustos y 13, trepadoras. En los arbustos la dormancia fisiológica fue la más abundante, y en las trepadoras predominaron la fisiológica y la física. Entre las trepadoras se hallaron las únicas especies con dormancia morfológica y/o morfofisiológica. El mayor número de semillas dormantes se encontró en la estación seca (87 %. El estudio confirmó la diversidad de mecanismos de dormancia y requerimientos germinativos ya reportados en estas formas de vida para el trópico.

  13. Floristic composition, biological spectrum and phenology of tehsil havelian, district abbottabad, KP, pakistan

    International Nuclear Information System (INIS)

    Shaheen, S.; Iqbal, Z.; Ijaz, F.; Rahman, I.

    2016-01-01

    Detailed field survey was carried out to assess the floristic composition, phenology, leaf and biological spectrum of Tehsil Havelian during 2011-2012. A total of 205 plant species belonging to 78 families were documented. According to plant habit there are 129 species of herbs, 38 species of trees and 38 species of shrubs. Asteraceae and Lamiaceae were dominant families with 15 species each, then Brassicaceae 11 species, Rosaceae and Papilionaceae with 10 species each. They were followed by Ranunculaceae with 9 species. All the remaining 72 families have less than 7 members. Flowering season was classified in two spells, first from March to July with 62.56% herbs, 19.48% shrubs, 18.46% trees, 2.56% grasses and 1.02% ferns. Second spell starts from August to November with 50% shrubs, 30% herbs and 20% trees. The life form classes were determined by the Raunkier's method which reveals that the most dominant life form was Therophytes with 89 species (43.68%), followed by Nanophanerophytes 26 species (12.62%), Megaphanerophytes 20 species (9.70%), Mesophanerophytes 19 species (9.22%), Chamaephytes 15 species (7.28%), Hemicryptophytes 15 species (7.28%), Geophytes 11 species (5.33%), Lianas 6 species (2.91%), Microphanerophytes 3 species (1.45%) and Neophytes with 1 species (0.48%). As for as leaf size concerned, Microphyll was the most prevalent leaf size with 98 species (47.80%), followed by Nanophyll 55 spp. (26.82%), Leptophyll 28 species (13.65%), Mesophyll 16 spp. (7.80%) and Megaphyll contributing with 8 species (3.90%). Study reflects the overall ecological scenario and may be beneficial as reference study for conservation and sustainable use of plants. (author)

  14. Widespread paleopolyploidy, gene tree conflict, and recalcitrant relationships among the carnivorous Caryophyllales.

    Science.gov (United States)

    Walker, Joseph F; Yang, Ya; Moore, Michael J; Mikenas, Jessica; Timoneda, Alfonso; Brockington, Samuel F; Smith, Stephen A

    2017-06-01

    The carnivorous members of the large, hyperdiverse Caryophyllales (e.g., Venus flytrap, sundews, and Nepenthes pitcher plants) represent perhaps the oldest and most diverse lineage of carnivorous plants. However, despite numerous studies seeking to elucidate their evolutionary relationships, the early-diverging relationships remain unresolved. To explore the utility of phylogenomic data sets for resolving relationships among the carnivorous Caryophyllales, we sequenced 10 transcriptomes, including all the carnivorous genera except those in the rare West African liana family Dioncophyllaceae. We used a variety of methods to infer the species tree, examine gene tree conflict, and infer paleopolyploidy events. Phylogenomic analyses supported the monophyly of the carnivorous Caryophyllales, with a crown age of 68-83 million years. In contrast to previous analyses, we recovered the remaining noncore Caryophyllales as nonmonophyletic, although the node supporting this relationship contained a significant amount of gene tree discordance. We present evidence that the clade contains at least seven independent paleopolyploidy events, previously unresolved nodes from the literature have high levels of gene tree conflict, and taxon sampling influences topology even in a phylogenomic data set, regardless of the use of coalescent or supermatrix methods. Our data demonstrate the importance of carefully considering gene tree conflict and taxon sampling in phylogenomic analyses. Moreover, they provide a remarkable example of the propensity for paleopolyploidy in angiosperms, with at least seven such events in a clade of less than 2500 species. © 2017 Walker et al. Published by the Botanical Society of America. This work is licensed under a Creative Commons Attribution License (CC-BY).

  15. PENERAPAN KONSEP BANGUNAN RAMAH LINGKUNGAN MELALUI KONSTRUKSI GREEN PANEL SEBAGAI ALTERNATIF PENINGKATAN KENYAMANAN DALAM RUANG

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    Fitriyah Nurul Hidayati Utami

    2008-12-01

    Full Text Available Warmer air condition as the impact of global warming had effect to human bulding scale, i.e. the increasing of room temperature (T and relative humidity (RH. It causes an uncomfortable situation inside one building without using mechanical controlling temperature equipment, such as air conditioner (AC. Therefore, there is an alternative to improve indoor amenity by using green panel construction which appropriate with green building concept. The terninology of green panel in this research was designated a panel made by an iron material, which as a function as secondary skin (second layer that protect room inside from direct solar radiation, and also as an attempt for green building, or as a media for liana-plant growing. This research was conducted in Departemnr of Landscafe Architecture (DLA Class Room and its Corridor (Wing 13, Level VI. As a comparison location was General Laboratory which is managed by Departement of Agronomy and Horticulture (DAH located in the same wing and level, and DAH’s seminar room in the same level, but it antother wing. The effect of micro climate (T and RH in DLA’s Class Room were showed from the value of Temperature Humidity Index (THI around 25.7 to 30.6, with average 28.1 which is categorized as uncomfortable zone. The THI of DLA’s Class Room were about 25.7-27.1 (in the morning, 25.8-29.3 (in the afternoon and 25.8-30.6 (in the evening. Amenity level (THI value of DLA’s Class Room after green panel constructions were changed to 25.4 until 30.2 with average 27.7 which is still in uncomfortable category. However, THI value in the morning was in comportable category. If green panel coverage’s reach 100% the average THI value will decrease to comportable category (THI 21.0-27.0. The result of SBE test shows that the SBE value has positive correlation with green panel construction. Four photos with the highest SBE’s value were the photo after green panel constructed. This mean the construction of green

  16. Análise de agrupamento da vegetação de um fragmento de Floresta Estacional Decidual Aluvial, Cachoeira do Sul, RS, Brasil

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    Maristela Araujo Machado

    2004-01-01

    Full Text Available In the state of Rio Grande do Sul, the riparian forests have been altered and fragmented by human activity. The objective of this study was to analyze the structure and floristic composition of these forests, therefore providing information for the re-establishment of these ecosystems. The study site is a 4 ha fragment located in Cachoeira do Sul- RS, low Jacuí River (30o04´36”S; 52o53´09”W. The arboreal and shrubby species and lianas (only life-form were inventoried using 10 m wide strips that were laid out perpendicular to the river and spaced at 50 m intervals. The strips were divided into 10 x 10 m plots. Within each plot all a individuals with girth at breast height – SBH ³ 15 were identified and their circumference and height measured. Species density data were entered into a matrix (70 x 42 that was used for multivariate analysis. The presence of species clusters at the interior of the fragment was analysed with TWINSPAN (Two-way indicator species analysis, which identified the existence of three forest sub-formations (S-F1, S-F2 e S-F3. S F1 was characterized by a higher influence of flooding and the ground water table was closer to the surface; SF2 occurred in the central part of the fragment, but presented a strong influence of flooding provided by inundation; and S-F3, also in the central part of the fragment, occurred the greatest influence from the ground water table. The indicator species of the three forest sub formations were Sebastiania commersoniana and Eugenia uniflora (S-F1; Gymnanthes concolor, Cupania vernalis and Seguieria aculeata (S-F2; and Casearia sylvestris and Allophylus edulis (S-F3. Therefore, in preservation projects, conservation and reestablishment of these ecosystems, the forest community cannot be treated as riparian only, but environmental and, consequently, floristics variations should be considered.

  17. ANÁLISE DE AGRUPAMENTO DA VEGETAÇÃO DE UM FRAGMENTO DE FLORESTA ESTACIONAL DECIDUAL ALUVIAL, CACHOEIRA DO SUL, RS, BRASIL

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    Paulo Luiz Contente de Barros

    2004-04-01

    Full Text Available No estado do Rio Grande do Sul, as florestas ripárias se encontram alteradas pela ação antrópica formando fragmentos. O estudo teve como objetivo analisar a estrutura e florística interna dessas florestas o que subsidiará informações para o restabelecimento desses ecossistemas. A área escolhida foi um fragmento (30o04’36”S; 52o53’09”W, de 4 ha, localizada no município de Cachoeira do Sul, RS, no Baixo Rio Jacuí. As espécies arbóreas, arbustivas e lianas (somente quanto à forma de vida foram inventariadas, utilizando-se faixas perpendiculares ao rio, distanciadas por 50 m, as quais apresentaram 10 m de largura e comprimento que variou com a largura da floresta. As faixas foram divididas em unidades amostrais de 10 x 10 m, nos quais foram identificados indivíduos com circunferência a 1,3m (CAP 15 cm, registrados os valores de circunferência e altura. Os dados de densidade por espécie formaram uma matriz (70x42 utilizada na análise multivariada. A presença de agrupamentos de espécies no interior do fragmento foi avaliada pelo TWINSPAN (Two-way indicator species analysis, com base no qual foi constatada a existência de três subformações florestais (S-F1, S-F2 e S-F3. A S-F1 foi caracterizada por ter maior influência das enchentes e lençol freático mais próximo da superfície; a S-F2 ocorreu na parte central do fragmento, mas apresentou forte influência dos extravasamentos causados pelas enchentes; e na S-F3, também na porção central, ocorreu maior influência do lençol freático. As espécies indicadoras das subformações foram: Sebastiania commersoniana e Eugenia uniflora (S-F1; Gymnanthes concolor, Cupania vernalis e Seguieria aculeata (S-F2; e Casearia sylvestris e Allophylus edulis (S-F3. Portanto, em projetos de preservação, conservação e restabelecimento desses ecossistemas, a comunidade florestal não pode ser tratada unicamente como ripária, mas considerando as variações ambientais e

  18. Phenology of seed and leaves rain in response to periodic climatic variability in a seasonal wet tropical forest

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    Matteo, D.; Wright, S. J.; Davies, S. J.; Muller-Landau, H. C.; Wolfe, B.; Detto, M.

    2016-12-01

    Phenology, by controlling the rhythms of plants, plays a fundamental role in regulating access to resources, ecosystem processes, competition among species, interactions with consumers and feedbacks to the climate. In high biodiverse tropical forests, where phenology of flowering and leafing are complex, an adequate representation of phenology must take into account a given set of climatic, edaphic and biotic factors. Climatic factors are particularly important because plants may use them as cues for timing different phenological phases and be influenced by their intensity. Climatic variability can be periodic, if events occur with regular frequency, or aperiodic. One prominent periodic large-scale pattern that causes unusual weather is ENSO event. In general, Central America tends to be dry and warm during a mature phase of an ENSO event, which usually peaks between October and January with a frequency of 2-3 events per decade. Because in many tropical areas the effect of ENSO is highly prominent, it is plausible that plants have adapted their growth and reproduction mechanisms to synchronize ENSO phases, in a similar way that plants do during the seasonal cycle. We used a long dataset (30+ years) of fruits and leaves rains of tropical trees and lianas to determine ecosystem response and species specific response of these phenological events to local climate variability corresponding to the modes of ENSO. Specifically, we tested the hypothesis that phenological responses to ENSO are similar to response to seasonal cycles, i.e., higher litterfall before a warm-dry phase and higher fruiting after such phase, with strong correlation between seeds and leaves. At sub-community level, we evaluated whether evergreen and deciduous, biotic and abiotic dispersers and free and climbing life forms, have the same response to ENSO in terms of leaves and seeds rain. At species level we tested the hypothesis that species with low photosynthetic capacity leaves are more responsive

  19. Levantamento florístico em remanescente de floresta ripária no alto rio Paraná: Mata do Araldo, Porto Rico, Paraná, Brasil - DOI: 10.4025/actascibiolsci.v27i4.1275 Floristic survey in riparian forest remains of the upper Paraná River: Mata do Araldo, Porto Rico, Paraná, Brazil - DOI: 10.4025/actascibiolsci.v27i4.1275

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    Reinaldo Monteiro

    2005-03-01

    Full Text Available Com o objetivo de elaborar um levantamento florístico em floresta ripária do alto rio Paraná, foi realizado o presente estudo em remanescente sob domínio da floresta estacional semidecidual submontana, localizado em Porto Rico, Paraná, Brasil (53o19’3”W e 22o47’37”S. No interior e adjacências de uma parcela de 10.000 m2 (100 m x 100 m, foram levantadas 165 espécies, reunidas em 124 gêneros e 60 famílias, e distribuídas entre arbóreas, arbustivas, herbáceas, lianas e hemiparasitas. Leguminosae, Myrtaceae, Poaceae, Rubiaceae e Bignoniaceae foram as famílias de maior riqueza específica, contribuindo juntas com 33,33% das espécies e, dentre os gêneros, a maior riqueza foi representada por Eugenia, Casearia, Guarea, Inga, Panicum e Solanum, que reuniram 12,73% das espécies. Apesar das perturbações verificadas no remanescente, oito espécies foram consideradas raras para florestas ripárias e 12 foram citadas como alimento natural de peixesThe purpose of this study was to realize a floristic survey in riparian forest remains of the Upper Paraná River, under domain of the submontane seasonal semideciduous forest, located in Porto Rico, Paraná, Brazil (53o19’3” W e 22o47’37” S. Within and in the neighborhood of 10.000 m2 area (100 m x 100 m, 165 species were surveyed, in 124 genera and 60 families, distributed in arboreous, shrubs, herbs, climbers and hemiparasites. Leguminosae, Myrtaceae, Poaceae, Rubiaceae, and Bignoniaceae were the families with the highest species' richness, showing together 33.33%, and the genera more representative were Eugenia, Casearia, Guarea, Inga, Panicum, and Solanum, with 12.73% of the species. Though the perturbations verified in the forest remains, eight species were rare for this type of vegetation and 12 were listed as fishes natural food

  20. ETNO-MATEMÁTICA EN INDÍGENAS ULWAS, COMUNIDAD DE KARAWALA, REGIÓN AUTÓNOMA ATLÁNTICO SUR, NICARAGUA

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    Minerva Soza Valverde

    2013-02-01

    Full Text Available Esta investigación analizó los conocimientos etno-matemáticos que poseen los pueblos indígenas ulwas, comunidad de Karawala, Región Autónoma Atlántico Sur (RAAS, a partir de la identificación de las manifestaciones socioculturales que representan saberes etno-matemáticos ancestrales. La investigación fue cualitativa con enfoque antropológico. Se realizaron  guías de observación, entrevistas y grupos focales con líderes, autoridades de la comunidad, docentes y ancianos. Entre los resultados se obtuvo que el Sistema Numérico del Conteo con los Dedos; este conteo los ancestros ulwas lo hacían con los dedos de las manos y de los pies, en el Sistema de Medición se identifican como unidades de medidas la vara, la jícara, los nudos en bejuco. También el empleo  de conocimientos geométricos en la construcción de viviendas tradicionales, nasas y elaboración del metate. Estos aportes contribuyen a la revitalización cultural de  los pueblos indígenas ulwas y a la gestión curricular en el Subsistema Educativo Autonómico Regional (SEAR, los cuales deben ser adoptados en la transformación curricular de los programas de la Educación Intercultural Bilingüe.  Summary  This research examined the ethno-mathematical knowledge that the Ulwas indigenous people possesses, who are located in Karawala community, South Atlantic Autonomous Region (RAAS, based on the identification of sociocultural manifestations that the ethno-mathematical ancestral knowledge represents. The research was qualitative with anthropological approach. Observation guides were made, interviews and focus groups with leaders, community authorities, teachers and elders. Among the results obtained, it reflects the Counting Numerical System with the Fingers. This counting was done by the Ulwas ancestors with their fingers and toes. In the Measurement System several elements were identified as measuring units, such as the stick, the gourd, and the knots on liana

  1. Late Miocene (Pannonian) Vegetation from the Northern Part of Central Paratethys

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    Kováčová, M.; Doláková, N.

    2009-04-01

    During Late Miocene, the Western Carpathian paleogeography started to change. The Lake Pannon retreated southwards, and the northern coast of the back arc basin was slightly elevated due to progradation of deltaic and alluvial facies, especially in the lowlands. The studied „Pannonian lake" sediments come from the Czech and Slovak parts of Central Paratethys. Changes of the sedimentary environment from deep to shallow lake and deltaic environment, followed by development of alluvial plains were noticed. Salinity crisis due to Paratethys isolation led to development of total freshwater environment to the end of this period. Samples from 3 surficial localities and 15 boreholes were palynologically studied. Occasional occurences of Dinoflagellates indicate a slightly higher salinity, whereas green algae Pediastrum, aquatic ferns Azolla, and aquatic and coastal plants (Nelumbo, Nymphaea, Myriophyllum, Sparganium, Potamogeton, Cyperaceae etc.) represent a freshwater environment. Due to paleogeographic changes and climatic oscillations the number of thermophilous taxa decreased and some of them disappeared completely from this area (f. e. Sapotaceae, Palmae). Mostly broad-leaved deciduous elements of mixed mesophytic forests (Quercus, Celtis, Carya, Tilia, Carpinus, Betula, Juglans) with some thermophilous elements admixture of Engelhardia, Castanea, Trigonobalanopsis, Symplocos, Cornaceaepollis satzveyensis generally dominate. Variously high relief of the uplifted mountainy chains created ideal conditions for higher presence of extrazonal vegetation (Cedrus, Tsuga, Picea, Cathaya) in the investigated area. Zonal type of vegetation including marshes, riparian forests with Alnus, Salix, Pterocarya, Liquidambar, Betula, Fraxinus, shrubs and lianas on dryer substrates associated riparian forest (Buxus, Ericaceae, Vitaceae, Lonicera, Rosaceae type Rubus), and coastal swamps with Taxodiaceae, Nyssa, Myrica, Sciadopitys were growing in the floodplain lowlands of Vienna Basin

  2. Zusammenfassungen in Deutsch

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    Nora Wiedenmann

    2010-04-01

    Full Text Available 1. Eine hybride Heuristik zur Lösung des Triangulations-ProblemsGloria Cerasela Crişan, Camelia Mihaela Pintea2. Vorschlag einer datenbasierten Architektur für eine Kardiologie-Netzwerk-AnwendungHorea Adrian Greblă, Călin Ovidiu Cenan3. Erziehungswissenschaftliche Forschung: zur technologischen Dimension des PrivatlebensLiliana Mâţă4. Ausgewählte Operationen für Assembler EncodingTomasz Praczyk5. Computerbasierte Programme zur Sprechtherapie bei Dyslalie und Dyslexie-DysgraphieIolanda Tobolcea, Mirela Danubianu6. Gedacht soap, jedoch gesagt ‘oaps’. Der Lautvorspann (Sound Preparation Period: Backward Calculation von der Äußerung bis zur Muskel-InnervierungNora Wiedenmann7. State of the Art: Lösungskonzepte für KoalitionsspieleSimina Brânzei8. Die Faktoren von Intelligenz-Entwicklung und individuelle PerformanzGheorghe Dumitriu9. Einige Ergebnisse zur Fuzzy-TheorieAngel Garrido10. Wissensfusion in akademischen NetzwerkenHorea Adrian Grebla, Calin Ovidiu Cenan, Liana Stanca11. Eine Delphi-Anwendung für die syntaktische und lexikalische Analyse eines Phrasen verwendenden Cocke-Younger-Kasami -Algorithmus.Bogdan Pătruţ, Ioana Boghian12. Über ein Problem von Passdaten bei Gebrauch von Bézier-KurvenCarmen Violeta Muraru13. State of the Art: Verifizierung von Unterschriften-Biometrie-DatenMohamed Soltane, Noureddine Doghmane, Noureddine Guersi14. Die Neurowissenschaften des Lehrens von Erzähltexten: zur Erleichterung der sozialenund emotionalen EntwicklungLisa Whalen15. Logische Grundlagen der Künstlichen IntelligenzAngel Garrido16. Psychologisch-mystische Aspekte zu St. Evagrius Ponticus und St. Maximus dem BekennerGheorghe Teofil Popovici17. Geo-spatiale Analyse-StrukturElisabeta Antonia Haller18. Henric Sanielevici – von der Literaturkritik zur Anatomie oder Wie beeinflusst der Schädelumfang die Literatur?Adrian Jicu19. Wie komplex das menschliche Gehirn funktioniert: die beiden HemisphärenIulia Cristina Timofti20

  3. Primary forest dynamics in lowland dipterocarp forest at Danum Valley, Sabah, Malaysia, and the role of the understorey.

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    Newbery, D M; Kennedy, D N; Petol, G H; Madani, L; Ridsdale, C E

    1999-11-29

    Changes in species composition in two 4-ha plots of lowland dipterocarp rainforest at Danum, Sabah, were measured over ten years (1986-1996) for trees > or = 10 cm girth at breast height (gbh). Each included a lower-slope to ridge gradient. The period lay between two drought events of moderate intensity but the forest showed no large lasting responses, suggesting that its species were well adapted to this regime. Mortality and recruitment rates were not unusual in global or regional comparisons. The forest continued to aggrade from its relatively (for Sabah) low basal area in 1986 and, together with the very open upper canopy structure and an abundance of lianas, this suggests a forest in a late stage of recovery from a major disturbance, yet one continually affected by smaller recent setbacks. Mortality and recruitment rates were not related to population size in 1986, but across subplots recruitment was positively correlated with the density and basal area of small trees (10-change in mortality with increasing gbh: in the former it increased, in the latter it decreased. Forest processes are centred on this understorey quasi-stratum. The two replicate plots showed a high correspondence in the mortality, recruitment, population changes and growth rates of small trees for the 49 most abundant species in common to both. Overstorey species had higher rgrs than understorey ones, but both showed considerable ranges in mortality and recruitment rates. The supposed trade-off in traits, viz slower rgr, shade tolerance and lower population turnover in the understorey group versus faster potential growth rate, high light responsiveness and high turnover in the overstorey group, was only partly met, as some understorey species were also very dynamic. The forest at Danum, under such a disturbance-recovery regime, can be viewed as having a dynamic equilibrium in functional and structural terms. A second trade-off in shade-tolerance versus drought-tolerance is suggested for

  4. Comparison of the diet of Alouatta caraya (Primates: Atelidae between a riparian island and mainland on the Upper Parana River, southern Brazil Comparação da dieta de Alouatta caraya (Primates: Atelidae em mata ciliar insular e continental na região do Alto rio Paraná, Sul do Brasil

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    Gabriela Ludwig

    2008-09-01

    Full Text Available Howler monkeys (Alouatta Lacèpéde, 1799 are folivores-frugivores with flexible diets depending on conditions. Here, we compare the diets of Alouatta caraya (Humboldt, 1812 in two riparian forests (island and mainland, in Porto Rico region, Upper Paraná River, Southern Brazil. Howlers were followed from October 2004 to September 2005 in the riparian forest of a 1,050 ha island and in the continuous riparian forest on the mainland (left bank of the river. The "scan sampling" method with instantaneous samples every 15 minutes was used. Besides vines, diet breadth was similar: 17 species consumed on the island versus 16 species on the mainland. Both consumed leaves followed by fruits more than any other food type (leaves: island - 65%, mainland - 49%, fruits: island - 24%, mainland - 46%. Even though the plant Cecropia pachystachya Trécul is less abundant in the mainland it was the item most consumed in both locations all year long, which suggests its importance for the howlers. Diet also varied both seasonally and between the island and mainland, apparently following changes in local abundance of each item and due to plant phenologies.Os bugios (Alouatta Lacèpéde, 1799 são primatas folívoros-frugívoros que podem adaptar suas dietas dependendo das condições do ambiente. O presente trabalho compara a dieta de grupos de Alouatta caraya (Humboldt, 1812 presentes em matas ciliares estruturalmente diferentes (ilha e continente, na região de Porto Rico, Alto rio Paraná, sul do Brasil. Os bugios-pretos foram seguidos de outubro de 2004 a setembro de 2005 em mata ciliar de uma ilha fluvial de 1050 ha e em mata ciliar contínua da margem esquerda do rio. Foi utilizado o método "scan sampling" em amostragens instantâneas com intervalos de 15 minutos. Além das lianas, 17 espécies foram consumidas na ilha versus 16 espécies no continente. Ambos os grupos consumiram mais folhas seguido de frutos do que qualquer outro tipo de alimento (folhas

  5. [Diversity, structure and regeneration of the seasonally dry tropical forest of Yucatán Peninsula, Mexico].

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    Hernández-Ramírez, Angélica María; García-Méndez, Socorro

    2015-09-01

    Seasonally dry tropical forests are considered as the most endangered ecosystem in lowland tropics. The aim of this study was to characterize the floristic composition, richness, diversity, structure and regeneration of a seasonally dry tropical forest landscape constituted by mature forest, secondary forest and seasonally inundated forest located in the Northeastern part of the Yucatán Peninsula, Mexico. We used the Gentry's standard inventory plot methodology (0.1 ha per forest type in 2007) for facilitating comparison with other Mesoamerican seasonally dry tropical forests. A total of 77 species belonging to 32 families were observed in the study area. Fabaceae and Euphorbiaceae were the families with the largest taxonomic richness in the three forest types. Low levels of β diversity were observed among forest types (0.19-0.40), suggesting a high turnover of species at landscape level. The non-regenerative species were dominant (50-51 %), followed by regenerative species (30- 28 %), and colonizer species (14-21 %) in the three forest types. Zoochory was the most common dispersal type in the study area. The 88 % of the observed species in the study area were distributed in Central America. Some floristic attributes of the seasonally dry tropical forest of the Yucatán Peninsula, fall into the values reported for Mesoamerican seasonally dry tropical forests. Natural disturbances contributed to explain the high number of individuals, the low number of liana species, as well as the low values of basal area observed in this study. Our results suggested that the seasonally dry tropical forest of Yucatán Peninsula seems to be resilient to natural disturbances (hurricane) in terms of the observed number of species and families, when compared with the reported values in Mesoamerican seasonally dry tropical forests. Nonetheless, the recovery and regeneration of vegetation in long-term depends on animal-dispersed species. This study highlights the importance of

  6. Chuva de sementes em remanescentes florestais de Campo Verde, MT

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    William Pietro-Souza

    2014-08-01

    Full Text Available O objetivo deste trabalho consistiu em avaliar sazonalmente a produção de sementes provenientes de fragmentos florestais presentes na zona rural de Campo Verde, MT. Essa caracterização ocorreu em termos de produção de sementes e riqueza de espécies vegetais. Foram selecionados três fragmentos florestais caracterizados como Floresta Estacional Semidecidual. Em cada fragmento, cinco coletores foram instalados e confeccionados com canos de PVC (1 m²; malha de náilon de 0,001 m e 0,15 m de profundidade do bojo. O material foi coletado mensalmente, cujas sementes foram quantificadas e separadas conforme a síndrome de dispersão, etapa sucessional e forma de vida. Houve a determinação da densidade, frequência absoluta, índice de diversidade e equitabilidade. Ao todo, foram obtidas 3.622 sementes, pertencentes a 74 táxons. Maiores densidades de sementes foram observadas durante os meses de setembro, outubro e novembro. As lianas Gouania sp., Fridericia speciosa, Heteropterys sp. e Distictella sp. responderam com 55,95% do total de sementes aportadas. Das espécies que compuseram a chuva de sementes, 74% não são dispersas pelo vento. Todavia, quando se verificou a quantidade de diásporos coletados, formas dispersas pelo vento foram predominantes, representando 76% do total. Citam-se como táxons arbóreos importantes para a recomposição florestal na região de Campo Verde, situada no Sudeste de Mato Grosso: Tachigali rubiginosa, Siparuna guianensis, Nectandra sp., Cordia alliodora, Alibertia sp., Terminalia brasiliensis e Myrcia sp. Essas espécies devem ser alvo de estudos mais específicos relacionados ao seu potencial para recuperação de ambientes degradados, considerando-se as Áreas de Preservação Permanente e Reservas Legais.

  7. Floristic structure and biomass distribution of a tropical seasonal rain forest in Xishuangbanna, southwest China

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    Shanmughavel, P.; Zheng Zheng; Sha Liqing; Cao Min [Chinese Academy of Sciences, Kunming (China). Dept. of Forest Ecology

    2001-07-01

    The aim of this research was to study the forest community structure, tree species diversity and biomass production of a tropical seasonal rain forest in Xishuangbanna, southwest China. The community structure showed a diversified species composition and supported many species of economic significance. This tropical rain forest in closely related to Malaysian forests. The biomass and its distribution were studied using standard regression analysis and the clear-cut method for shrubs and herbs. The total biomass was 360.9 t/ha and its allocation in different layers was: tree layer 352.5 t/ha, shrub layer 4.7 t/ha, liana 3.1 t/ha and herb layer 0.5 t/ha. Most of the biomass was concentrated in the trees: stem 241.2 t/ha, root 69.6 t/ha, branch 37.2 t/ha and leaves 4.3 t/ha. The DBH class allocation of the tree biomass was concentrated in the middle DBH class. The biomass of six DBH classes from 20 to 80 cm was 255.4 t/ha. There are twenty-six species with biomass over 0.5% of the total biomass of the tree layer, and three species with biomass over 5%, i.e., Pometia tomentosa, Barringtonia macrostachya (5.4%) and Terminalia myriocarpa (5.2%). Data on stem, branch, leaves and root of the individual tree species were used to develop regression models. D{sup 2}H was found to be the best estimator of the biomass in this tropical rain forest. However, higher biomass figures have been reported from tropical forests elsewhere e.g., 415-520 t/ha in the tropical forests of Cambodia, the tropical moist mixed dipterocarp forests, and the tropical moist logged moist evergreen-high, medium, and low yield forests of Sri Lanka. In some forests, lower accumulation of biomass was reported, e.g., 10-295 t/ha in the tropical moist forests of Bangladesh, the tropical moist dense forest of Cambodia, the tropical dry forests of India, the tropical moist forests of Peninsular-Malaysia, the tropical moist mixed dipterocarp forests of Sarawak-Malaysia, the tropical evergreen forests of

  8. Análise de agrupamento da vegetação de um fragmento de Floresta Estacional Decidual Aluvial, Cachoeira do Sul, RS, Brasil.

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    Maristela Machado Araújo

    2010-08-01

    Full Text Available No estado do Rio Grande do Sul, as florestas ripárias se encontram alteradas pela ação antrópica formando fragmentos. O estudo teve como objetivo analisar a estrutura e florística interna dessas florestas o que subsidiará informações para o restabelecimento desses ecossistemas. A área escolhida foi um fragmento (30o04'36"S; 52o53'09"W, de 4 ha, localizada no município de Cachoeira do Sul, RS, no Baixo Rio Jacuí. As espécies arbóreas, arbustivas e lianas (somente quanto à forma de vida foram inventariadas, utilizando-se faixas perpendiculares ao rio, distanciadas por 50 m, as quais apresentaram 10 m de largura e comprimento que variou com a largura da floresta. As faixas foram divididas em unidades amostrais de 10 x 10 m, nos quais foram identificados indivíduos com circunferência a 1,3m (CAP 15 cm, registrados os valores de circunferência e altura. Os dados de densidade por espécie formaram uma matriz (70x42 utilizada na análise multivariada. A presença de agrupamentos de espécies no interior do fragmento foi avaliada pelo TWINSPAN (Two-way indicator species analysis, com base no qual foi constatada a existência de três subformações florestais (S-F1, S-F2 e S-F3. A S-F1 foi caracterizada por ter maior influência das enchentes e lençol freático mais próximo da superfície; a S-F2 ocorreu na parte central do fragmento, mas apresentou forte influência dos extravasamentos causados pelas enchentes; e na S-F3, também na porção central, ocorreu maior influência do lençol freático. As espécies indicadoras das subformações foram: Sebastiania commersoniana e Eugenia uniflora (S-F1; Gymnanthes concolor, Cupania vernalis e Seguieria aculeata (S-F2; e Casearia sylvestris e Allophylus edulis (S-F3. Portanto, em projetos de preservação, conservação e restabelecimento desses ecossistemas, a comunidade florestal não pode ser tratada unicamente como ripária, mas considerando as variações ambientais e, conseq

  9. Temporal dynamics and leaf trait variability in Neotropical dry forests

    Science.gov (United States)

    Hesketh, Michael Sean

    This thesis explores the variability of leaf traits resulting from changes in season, ecosystem successional stage, and site characteristics. In chapter two, I present a review of the use of remote sensing analysis for the evaluation of Neotropical dry forests. Here, I stress the conclusion, drawn from studies on land cover characterization, biodiversity assessment, and evaluation of forest structural characteristics, that addressing temporal variability in spectral properties is an essential element in the monitoring of these ecosystems. Chapter three describes the effect of wet-dry seasonality on spectral classification of tree and liana species. Highly accurate classification (> 80%) was possible using data from either the wet or dry season. However, this accuracy decreased by a factor of ten when data from the wet season was classified using an algorithm trained on the dry, or vice versa. I also address the potential creation of a spectral taxonomy of species, but found that any clustering based on spectral properties resulted in markedly different arrangements in the wet and dry seasons. In chapter 4, I address the variation present in both physical and spectral leaf traits according to changes in forest successional stage at dry forest sites in Mexico and Costa Rica. I found significant differences in leaf traits between successional stages, but more strongly so in Costa Rica. This variability deceased the accuracy of spectral classification of tree species by a factor of four when classifying data using an algorithm trained on a different successional stage. Chapter 5 shows the influence of seasonality and succession on trait variability in Mexico. Differences in leaf traits between successional stages were found to be greater during the dry season, but were sufficient in both seasons to negatively influence spectral classification of tree species. Throughout this thesis, I show clear and unambiguous evidence of the variability of key physical and spectral

  10. Ayahuasca: uma abordagem toxicológica do uso ritualístico Ayahuasca: a toxicological approach of the ritualistic use

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    Maria Carolina Meres Costa

    2005-12-01

    Full Text Available O chá da Ayahuasca vem sendo utilizado milenarmente por índios da América do Sul,como instrumento espiritual e ritual, com extrema religiosidade. No século passado surgiram seitas não-indígenas, que passaram a fazer uso do chá. Essa utilização vem aumentando desde a liberação do uso da Ayahuasca para fins religiosos no Brasil. A ação do chá deve-se à presença de alcalóides nas plantas utilizadas na sua preparação: o cipó Banisteriopsis caapi e as folhas do arbusto Psycotria viridis. Os efeitos observados são: alucinações, hipertensão, taquicardia, náuseas, vômitos e diarréia. Estas ações podem causar efeitos mais sérios ao organismo e, portanto, merecem maior atenção dos profissionais da saúde, no sentido de que se promovam estudos que possam permitir a utilização religiosa do chá sem maiores danos biológicos e para a conscientização dos usuários sobre os possíveis efeitos tóxicos destas substâncias.The Ayahuasca tea has been used for more than a thousand years by the Indians of South America, as a spiritual and ritualistic instrument, for religious purposes. Non-Indians sects have arose in the last century, and started to use the tea. This utilization is increasing since the legalization of the Ayahuasca for religious use in Brazil. The effect of the tea is caused by the presence of alkaloids in the plants used in its preparation: the Banisteriopsis caapi liana, and the leaves of Psycotria viridis shrub. The effects observed are: hallucination, hypertension, tachycardia, nausea, vomiting and diarrhea. These actions may cause more serious damage to the organism, and therefore deserve more attention from the health professionals, because even for strickly religious use the tea may cause higher biological damage and therefore, the users should be made aware of the possible toxic effects of these substances.

  11. O CONFLITO COMO PROMOTOR DA LIBERDADE NA REPÚBLICA MAQUIAVELIANA

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    Luis Fernando de Carvalho Sousa

    2016-12-01

    The Machiavellian thinking is cause of disputes and controversies between several researchers. These conflicts usually revolve around the interpretation of political positions and implications of concepts used by the author. This article seeks to understand the issue of conflict in the Machiavellian republic and its actors, aiming to identify the role of the people in the conflict and the role that Machiavelli attributes to it as one of the key players in maintaining in promoting freedom within the republican regime proposed by the philosopher. This element appears as one of the key players in the maintenance and promotion of democracy. In this sense, become key elements to understand the political disputes in the republic. Through a bibliographical research the article sought to understand this conflicting relationship that takes place within the republican environment and concluded that although there are divergences around the dispositions within the republic the role of resolving them always rests with the institutions. Keywords: Machiavelli; Conflict; Freedom; Republic; People. EL CONFLICTO COMO UN PROMOTOR DE LA LIBERTAD EN LA REPÚBLICA MAQUIAVÉLIANA RESUMEN El pensamiento maquiavélico es causa de conflictos y controversias entre varios investigadores. Estos conflictos por lo general giran en torno a la interpretación de las posiciones políticas e implicaciones de los conceptos utilizados por el autor. En este artículo se busca entender el tema del conflicto en la república maquiavélica y sus actores, con el objetivo de identificar el papel del pueblo en los conflictos y el papel que Maquiavelo atribuye a él como uno de los jugadores clave en el mantenimiento en la promoción de la libertad dentro del régimen republicano propuesto por el filósofo. Este elemento aparece como uno de los jugadores clave en el mantenimiento y promoción de la democracia. En este sentido, se convierten en elementos clave para entender los conflictos políticos en la rep

  12. Changes in structure and composition of evergreen forests on an altitudinal gradient in the Venezuelan Guayana Shield

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    Lionel Hernández

    2012-03-01

    Full Text Available There have been several ecological studies in forests of the Guayana Shield, but so far none had examined the changes in structure and composition of evergreen forests with altitude. This study describes and analyzes the structure, species composition and soil characteristics of forest stands at different altitudinal zones in Southeastern Venezuelan Guayana, in order to explain the patterns and the main factors that determine the structure and composition of evergreen forests along the altitudinal gradient. Inventories of 3 948 big (>10cm DBH and 1 328 small (5-10cm DBH woody stems were carried out in eleven plots, ranging from 0.1 to 1.0ha, along a 188km long transect with elevations between 290 and 1 395masl. It has been found that 1 hemiepihytes become more dominant and lianas reduce their dominance with increasing altitude and 2 the forest structure in the study area is size-dependent. Five families and 12 genera represented only 9% of the total number of families and genera, respectively, recorded troughout the gradient, but the two groups of taxa comprised more than 50% of the Importance Value (the sum of the relative density and the relative dominance of all measured stems. Moreover, the results suggest that low species richness seems to be associated with the dominance of one or few species. Stand-level wood density (WD of trees decreased significantly with increasing elevation. WD is an indicator of trees’life history strategy. Its decline suggests a change in the functional composition of the forest with increasing altitude. The Canonical Correspondence Analysis (CCA indicated a distinction of the studied forests on the basis of their altitudinal levels and geographic location, and revealed different ecological responses by the forests, to environmental variables along the altitudinal gradient. The variation in species composition, in terms of basal area among stands, was controlled primarily by elevation and secondarily by rainfall

  13. Vegetation and floristics of a lowland tropical rainforest in northeast Australia.

    Science.gov (United States)

    Tng, David Y P; Apgaua, Deborah M G; Campbell, Mason J; Cox, Casey J; Crayn, Darren M; Ishida, Françoise Y; Laidlaw, Melinda J; Liddell, Michael J; Seager, Michael; Laurance, Susan G W

    2016-01-01

    Full floristic data, tree demography, and biomass estimates incorporating non-tree lifeforms are seldom collected and reported for forest plots in the tropics. Established research stations serve as important repositories of such biodiversity and ecological data. With a canopy crane setup within a tropical lowland rainforest estate, the 42-ha Daintree Rainforest Observatory (DRO) in Cape Tribulation, northern Australia is a research facility of international significance. We obtained an estimate of the vascular plant species richness for the site, by surveying all vascular plant species from various mature-phase, remnant and open vegetation patches within the site. We also integrate and report the demography and basal areas of trees ≥ 10 cm diameter at breast height (dbh) in a new 1-ha core plot, an extension to the pre-existing forest 1-ha plot under the canopy crane. In addition, we report for the canopy crane plot new demography and basal areas for smaller-size shrubs and treelets subsampled from nine 20 m(2) quadrats, and liana basal area and abundance from the whole plot. The DRO site has an estimated total vascular plant species richness of 441 species, of which 172 species (39%) are endemic to Australia, and 4 species are endemics to the Daintree region. The 2 x 1-ha plots contains a total of 262 vascular plant species of which 116 (1531 individuals) are tree species ≥ 10 cm dbh. We estimate a stem basal area of 34.9 m(2) ha(-1), of which small stems (tree saplings and shrubs analysis shows that DRO forests has a comparatively high stem density and moderate species diversity, due to the influence of cyclones. These data will provide an important foundation for ecological and conservation studies in lowland tropical forest. We present a floristic checklist, a lifeform breakdown, and demography data from two 1-ha rainforest plots from a lowland tropical rainforest study site. We also present a meta-analysis of stem densities and species diversity from

  14. Chemical composition, antinociceptive and anti-inflammatory effects in rodents of the essential oil of Peperomia serpens (Sw.) Loud.

    Science.gov (United States)

    Pinheiro, B G; Silva, A S B; Souza, G E P; Figueiredo, J G; Cunha, F Q; Lahlou, S; da Silva, J K R; Maia, J G S; Sousa, P J C

    2011-11-18

    Peperomia serpens (Piperaceae), popularly known as "carrapatinho", is an epiphyte herbaceous liana grown wild on different host trees in the Amazon rainforest. Its leaves are largely used in Brazilian folk medicine to treat inflammation, pain and asthma. This study investigated the effects of essential oil of Peperomia serpens (EOPs) in standard rodent models of pain and inflammation. The antinociceptive activity was evaluated using chemical (acetic acid and formalin) and thermal (hot plate) models of nociception in mice whereas the anti-inflammatory activity was evaluated by carrageenan- and dextran-induced paw edema tests in rats croton oil-induced ear edema, as well as cell migration, rolling and adhesion induced by carrageenan in mice. Additionally, phytochemical analysis of the EOPs has been also performed. Chemical composition of the EOPs was analyzed by gas chromatography and mass spectrometry (GC/MS). Twenty-four compounds, representing 89.6% of total oil, were identified. (E)-Nerolidol (38.0%), ledol (27.1%), α-humulene (11.5%), (E)-caryophyllene (4.0%) and α-eudesmol (2.7%) were found to be the major constituents of the oil. Oral pretreatment with EOPs (62.5-500 mg/kg) significantly reduced the writhing number evoked by acetic acid injection, with an ED(50) value of 188.8 mg/kg that was used thereafter in all tests. EOPs had no significant effect on hot plate test but reduced the licking time in both phases of the formalin test, an effect that was not significantly altered by naloxone (0.4 mg/kg, s.c.). EOPs inhibited the edema formation induced by carrageenan and dextran in rats. In mice, EOPs inhibited the edema formation by croton oil as well as the leukocyte and neutrophil migration, the rolling and the adhesion of leukocytes. These data show for the first time that EOPs has a significant and peripheral antinociceptive effect that seems unrelated to interaction with the opioid system. EOPs also displays a significant anti-inflammatory effect in

  15. 2-de protocol optimization and evaluation for proteome analysis of genus clematis taxa (ranunculaceae)

    International Nuclear Information System (INIS)

    Ishtiaq, M.; Maqbool, M.; Hussain, T.; Azam, S.

    2014-01-01

    to absence of Clematis DNA or protein sequences databases, FASTA and BLAST similarity searches were performed against other plant species databases were used for protein identification. The significance of 2-DE proteome analysis in predicting evolutionary trend of Clematis (liana) species and its potential significance in taxonomic identification for Traditional Chinese Medicine (TCM) pharmacopeia is described. (author)

  16. El yoco del cielo es cultivado: perspectivas sobre Paullinia yoco en el chamanismo airo-pai (secoya-tucano occidental

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    Luisa Elvira Belaunde

    2008-12-01

    Full Text Available Este artículo asocia la cosmovisón chamánica y onírica de los airo-pai (secoya con su manejo silvicultural del yoco (Paullinia yoco, una liana silvestre rica en cafeína, endémica del refugio del pleistocénico del Napo. Según las nociones etnobotánicas airo-pai,el yoco tiene la propiedad de «dar consejo» a quienes lo consumen. A partir del análisis de un canto chamánico de yajé (Banisteriopsis caapi, mitos e interpretación de sueños, mostramos cómo el manejo de esta especiees concebido según perspectivas contrastantes: para los espíritus celestiales el yoco es una planta cultivada, que crece en las chagras del cielo; para cuacuiyó («el dueño» del yoco, ave dispersora de su semilla, el yoco es su propio cultivo; y para los seres humanos terrestres, la recolección de yoco silvestre es parecida a la cacería (asociada oníricamente con el paujil (Nothocrax urumutum. De esta manera, este estudio ilustra la relevancia de un abordaje perspectivistapara comprender los conocimientos etnobotánicos subyacentesal manejo y extracción de especies silvestres de importancia ritual y práctica. -- This article associates Airo-pai shamanistic vision and interpretation of dreams with their silvicultural management of yoco (Paullinia yoco, a wild vine rich in caffeine, endemic to the pleistocene refuge of Napo. According to Airo-pai ethnobotanic notions, yoco is a plantthat «gives advice» to those who intake it. From the analysis of a shamanic chant of yajé (Banisteriopsis caapi, myths and interpretation of dreams, we show how the management of this species is conceived from contrasting perspectives: for celestial beings, yoco is a domesticated plant that grows in the celestial gardens; for cuacuiyó (yoco’s «Master», a seed-dispersing bird, yoco is its own plantation; and for terrestrial human beings, the collection of wild yoco is like hunting, associated in dreams with the nocturnal curassow (Nothocrax urumutum. This study thus

  17. Recursion to food plants by free-ranging Bornean elephant

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    Megan English

    2015-08-01

    Full Text Available Plant recovery rates after herbivory are thought to be a key factor driving recursion by herbivores to sites and plants to optimise resource-use but have not been investigated as an explanation for recursion in large herbivores. We investigated the relationship between plant recovery and recursion by elephants (Elephas maximus borneensis in the Lower Kinabatangan Wildlife Sanctuary, Sabah. We identified 182 recently eaten food plants, from 30 species, along 14 × 50 m transects and measured their recovery growth each month over nine months or until they were re-browsed by elephants. The monthly growth in leaf and branch or shoot length for each plant was used to calculate the time required (months for each species to recover to its pre-eaten length. Elephant returned to all but two transects with 10 eaten plants, a further 26 plants died leaving 146 plants that could be re-eaten. Recursion occurred to 58% of all plants and 12 of the 30 species. Seventy-seven percent of the re-eaten plants were grasses. Recovery times to all plants varied from two to twenty months depending on the species. Recursion to all grasses coincided with plant recovery whereas recursion to most browsed plants occurred four to twelve months before they had recovered to their previous length. The small sample size of many browsed plants that received recursion and uneven plant species distribution across transects limits our ability to generalise for most browsed species but a prominent pattern in plant-scale recursion did emerge. Plant recovery time was a good predictor of time to recursion but varied as a function of growth form (grass, ginger, palm, liana and woody and differences between sites. Time to plant recursion coincided with plant recovery time for the elephant’s preferred food, grasses, and perhaps also gingers, but not the other browsed species. Elephants are bulk feeders so it is likely that they time their returns to bulk feed on these grass species when

  18. Bioequivalence study of two formulations of candesartan cilexetil tablet in healthy subjects under fasting conditions

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    Tjandrawinata RR

    2013-08-01

    Full Text Available Raymond R Tjandrawinata,1 Effi Setiawati,2 Danang Agung Yunaidi,2 Ronal Simanjuntak,2 Iwan Dwi Santoso,2 Liana W Susanto1 1Dexa Laboratories of Biomolecular Sciences (DLBS, Cikarang, Indonesia; 2Bioavailability and Bioequivalence Laboratory, PT Equilab International, Jakarta, Indonesia Introduction: The present study was conducted to compare the bioavailability of two candesartan cilexetil 16 mg tablet formulations (test and reference formulations. Materials and methods: This study was a randomized, single- blind, two-period, cross-over study which included 24 healthy adult male and female subjects under fasting conditions. The pharmacokinetic parameters were determined based on the concentrations of candesartan (CAS 139481-59-7, using ultra-pressure high-performance liquid chromatography with a tandem mass spectrometer detector. In each of the two study periods (separated by a washout period of 1 week, a single dose of test or reference product was administered. The pharmacokinetic parameters assessed were area under the plasma concentration time curve (AUC from time 0 hours to 24 hours, AUC from time zero to infinity, the peak plasma concentration of the drug (Cmax, time to achieve the Cmax, and the elimination half-life. Results: The geometric mean ratios (90% confidence interval of the test drug/reference drug for candesartan were 100.92% (92.15%–110.52% for the AUC from 0 hours to 24 hours, 100.24% (92.24%–108.95% for the AUC from time zero to infinity, and 106.71% (93.20%–122.18% for the Cmax. The differences between the test and reference product in the time to achieve Cmax values and elimination half-life values were not statistically significant (P > 0.05. The 90% confidence intervals of the test/reference AUC ratio and Cmax ratio of candesartan were within the acceptance range for bioequivalence. There was no adverse event encountered during this bioequivalence study. Conclusion: It was concluded that the two candesartan tablet

  19. Bosques montanos-relictos en Kañaris (Lambayeque, Perú

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    Santos Llatas-Quiroz

    2013-05-01

    Full Text Available En Kañaris (Lambayeque se encuentran grandes bosques relictos, probablemente los mayores de la vertiente occidental de los Andes peruanos. Actualmente están muy bien conservados, pero al mismo tiempo es la zona botánicamente menos estudiada de todos los bosques relictos de la zona. Estos bosques se ubican en las alturas de Upaypiteq y adyacentes a los flancos de la cordillera occidental de los Andes en la vertiente del Atlántico: Shin Shin, San Lorenzo, Huacapampa, Pandachí, Gramalote, Walte, Mollepampa; entre los 1500 a 3000 m sobre el nivel del mar, en el distrito de Kañaris (2300 m y los bosques de Chiñama y Luto en la vertiente del Pacífico. La presente investigación se emprendió con el objeto de estudiar científicamente, mediante muestreos florísticos, la vida y estructura de los componentes de los bosques de Upaypiteq. Las muestras conducen a un avance de la investigación, determinando que los principales componentes arbóreos corresponden a las Lauráceas: Persea, Ocotea y Nectandra, Cunoniáceas: Weinmannia, Podocarpáceas: Podocarpus, Cecropiáceas: Cecropia, Mirtáceas: Myrcianthes, Moráceas: Ficus, Rubiáceas: Cinchona, Bignoniáceas: Tabebuia, Arecáceas: Ceroxylon y, helechos arborescentes del género Nephelea. Circundantes a la masa boscosa se encuentran varias especies de arbustos, de los géneros Miconia, Munnozia, Baccharis, Senna, Colignonia, Gaiadendron, Oreopanax, etc.; también en la estructura es muy frecuente las epífitas y lianas ascendentes: Bromeliáceas, Orquídeas, Heliconias, Aráceas, musgos. Los helechos herbáceos, hongos, líquenes gelatinosos, hepáticas, Balanoforáceas y Begonias, tapizan por completo el piso boscoso. La composición florística es similar al bosque de Cutervo y los bosques de la Vertiente Oriental de los Andes, que a los demás bosques relictos en la Vertiente Occidental. La presencia de estos bosques se debe preservar, por su importancia en los procesos ecológicos para la

  20. Species Diversity Distribution Patterns of Chinese Endemic Seed Plants Based on Geographical Regions.

    Science.gov (United States)

    Huang, Jihong; Ma, Keping; Huang, Jianhua

    2017-01-01

    Based on a great number of literatures, we established the database about the Chinese endemic seed plants and analyzed the compositions, growth form, distribution and angiosperm original families of them within three big natural areas and seven natural regions. The results indicate that the above characters of Chinese endemic plants take on relative rule at the different geographical scales. Among the three big natural areas, Eastern Monsoon area has the highest endemic plants richness, whereas Northwest Dryness area is the lowest. For life forms, herbs dominate. In contrast, the proportion of herbs of Eastern Monsoon area is remarkable under other two areas. Correspondingly the proportions of trees and shrubs are substantially higher than other two. For angiosperm original families, the number is the highest in Eastern Monsoon area, and lowest in Northwest Dryness area. On the other hand, among the seven natural regions, the humid and subtropical zone in Central and Southern China has the highest endemic plants richness, whereas the humid, hemi-humid region and temperate zone in Northeast China has the lowest. For life forms, the proportion of herbs tends to decrease from humid, hemi-humid region and temperate zone in Northeast China to humid and tropical zone in Southern China. Comparably, trees, shrubs and vines or lianas increase with the same directions. This fully represents these characters of Chinese endemic plants vary with latitudinal gradients. Furthermore, as to the number of endemic plants belonging to angiosperm original families, the number is the most in humid and subtropical zone in Center and Southern China, and tropical zone in Southern China in the next place. In contrast, the endemic plant of these two regions relatively is richer than that of The Qinghai-Tibet alpine and cold region. All above results sufficiently reflect that the Chinese endemic plants mainly distribute in Eastern Monsoon area, especially humid and subtropical zone in Center

  1. Rational design of novel, fluorescent, tagged glutamic acid dendrimers with different terminal groups and in silico analysis of their properties

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    Martinho N

    2017-09-01

    Full Text Available Nuno Martinho,1–3 Liana C Silva,1,4 Helena F Florindo,1 Steve Brocchini,2 Mire Zloh,3 Teresa S Barata2 1Research Institute for Medicines (iMed.ULisboa, Faculty of Pharmacy, Universidade de Lisboa, Lisbon, Portugal; 2Department of Pharmaceutics, UCL School of Pharmacy, London, 3School of Life and Medical Sciences, University of Hertfordshire, Hatfield, UK; 4Centro de Química-Física Molecular and IN – Institute of Nanoscience and Nanotechnology, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal Abstract: Dendrimers are hyperbranched polymers with a multifunctional architecture that can be tailored for the use in various biomedical applications. Peptide dendrimers are particularly relevant for drug delivery applications due to their versatility and safety profile. The overall lack of knowledge of their three-dimensional structure, conformational behavior and structure–activity relationship has slowed down their development. Fluorophores are often conjugated to dendrimers to study their interaction with biomolecules and provide information about their mechanism of action at the molecular level. However, these probes can change dendrimer surface properties and have a direct impact on their interactions with biomolecules and with lipid membranes. In this study, we have used computer-aided molecular design and molecular dynamics simulations to identify optimal topology of a poly(L-glutamic acid (PG backbone dendrimer that allows incorporation of fluorophores in the core with minimal availability for undesired interactions. Extensive all-atom molecular dynamic simulations with the CHARMM force field were carried out for different generations of PG dendrimers with the core modified with a fluorophore (nitrobenzoxadiazole and Oregon Green 488 and various surface groups (glutamic acid, lysine and tryptophan. Analysis of structural and topological features of all designed dendrimers provided information about their size, shape

  2. Biofuel plantations on forested lands: double jeopardy for biodiversity and climate.

    Science.gov (United States)

    Danielsen, Finn; Beukema, Hendrien; Burgess, Neil D; Parish, Faizal; Brühl, Carsten A; Donald, Paul F; Murdiyarso, Daniel; Phalan, Ben; Reijnders, Lucas; Struebig, Matthew; Fitzherbert, Emily B

    2009-04-01

    The growing demand for biofuels is promoting the expansion of a number of agricultural commodities, including oil palm (Elaeis guineensis). Oil-palm plantations cover over 13 million ha, primarily in Southeast Asia, where they have directly or indirectly replaced tropical rainforest. We explored the impact of the spread of oil-palm plantations on greenhouse gas emission and biodiversity. We assessed changes in carbon stocks with changing land use and compared this with the amount of fossil-fuel carbon emission avoided through its replacement by biofuel carbon. We estimated it would take between 75 and 93 years for the carbon emissions saved through use of biofuel to compensate for the carbon lost through forest conversion, depending on how the forest was cleared. If the original habitat was peatland, carbon balance would take more than 600 years. Conversely, planting oil palms on degraded grassland would lead to a net removal of carbon within 10 years. These estimates have associated uncertainty, but their magnitude and relative proportions seem credible. We carried out a meta-analysis of published faunal studies that compared forest with oil palm. We found that plantations supported species-poor communities containing few forest species. Because no published data on flora were available, we present results from our sampling of plants in oil palm and forest plots in Indonesia. Although the species richness of pteridophytes was higher in plantations, they held few forest species. Trees, lianas, epiphytic orchids, and indigenous palms were wholly absent from oil-palm plantations. The majority of individual plants and animals in oil-palm plantations belonged to a small number of generalist species of low conservation concern. As countries strive to meet obligations to reduce carbon emissions under one international agreement (Kyoto Protocol), they may not only fail to meet their obligations under another (Convention on Biological Diversity) but may actually hasten

  3. Florística de trechos de matas ciliares do ribeirão Borá e ribeirão Cubatão, Potirendaba – SP. Floristic of stretches of gallery forest of ribeirão Bora and ribeirão Cubatão, Potirendaba – SP.

    Directory of Open Access Journals (Sweden)

    Melina ALCALÁ

    2006-12-01

    Full Text Available As matas ciliares são de suma importânciapara a proteção dos cursos d’água, na manutenção dafauna aquática e terrestre, na regularização doregime hídrico e da melhoria da qualidade de água.A situação crítica em que se encontram essasflorestas deixa evidente a necessidade de estudosobre sua composição florística e a ecologia de seusremanescentes. O conhecimento da vegetação ciliar éimprescindível para a caracterização da vegetaçãoregional adjacente, permitindo estabelecer deforma mais segura as medidas mais adequadas demanejo e recuperação de áreas alteradas. As matasestudadas encontram-se na região noroeste doEstado de São Paulo, no município de Potirendaba(21° 01’ 34” S e 49° 22’ 38” W, a 469 m de altitude.Com o objetivo de caracterizar floristicamente ostrechos de matas ciliares do ribeirão Borá e Cubatão,foram identificadas espécies arbóreas, arbustivas,herbáceas e lianas de Magnoliophyta e classificaram-seas espécies arbóreas/arbustivas em categoriassucessionais. No ribeirão Borá (17 ha foramidentificadas 46 famílias, 84 gêneros e 96 espécies;no ribeirão Cubatão foram identificadas 41 famílias,94 gêneros e 109 espécies, sendo as famíliasLeguminosae, Asteraceae e Rubiaceae, as queapresentaram maior número de espécies.Considerando as categorias sucessionais, no ribeirãoBorá, as espécies arbóreo-arbustivas encontradasforam, na sua maioria, de secundárias iniciais, e noribeirão Cubatão a maioria foi de espéciespioneiras. A distribuição de espécies de acordocom as categorias sucessionais, mostra que há opredomínio de espécies iniciais (pioneira esecundária inicial. Isto sugere que esta floresta seencontra em uma condição jovem. Por se tratar deuma mata com predomínio de espécies iniciais,conclui-se que a caracterização sucessional davegetação está em estágio inicial de regeneração.O levantamento florístico fornece uma listaimportante de espécies que

  4. Florística e estrutura da vegetação arbórea de um fragmento de floresta semidecedual às margens do reservatório da usina hidrelétrica Dona Rita (Itambé do Mato Dentro, MG Floristic composition and structure of the tree community of a fragment of the submontane semideciduous forest in Itambé do Mato Dentro Minas Gerais State, south-eastern Brazil

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    Douglas Antônio de Carvalho

    2000-04-01

    Full Text Available Realizou-se o levantamento florístico e fitossociológico da comunidade arbórea de um fragmento de Floresta Estacionai Semidecidual Sub-Montana localizado às margens do reservatório da usina hidrelétrica Dona Rita, situado na Fazenda Camarinha, em Itambé do Mato Dentro, MG, na bacia do rio Doce (19º26'S, 43º 14' W, altitude entre 610 e 630m. Todos os indivíduos com diâmetro do caule à altura do solo > 5,0cm (exceto lianas encontrados em 35 parcelas de 15xl5m (0,78ha foram identificados, medidos e tiveram sua altura estimada (também foram coletados indivíduos que se apresentavam com estruturas reprodutivas, fora das parcelas. Foram estimados para cada espécie os seguintes parâmetros: densidade por área, freqüência absoluta, dominância absoluta e índice de valor de importância (IVI. Também foram calculados o índice de diversidade de Shannon e a equabilidade correspondente, o índice de similaridade de Jaccard e as distâncias euclidianas quadradas entre esta floresta e outras do alto e médio Rio Grande, baixo Paranaíba e alto São Francisco. Nas parcelas foram amostrados 2.430 indivíduos. Identificou-se 216 espécies (15 fora das parcelas pertencentes a 50 famílias e 144 gêneros. Destacam-se pelo IVI as famílias Euphorbiaceae, Myrtaceae e Caesalpiniaceae e as espécies Apuleia leiocarpa, Pera glabrata, Licania hypoleuca e Mabeafistulifera. Comparada com algumas florestas ciliares do Estado, a floresta de Itambé do Mato Dentro se assemelha mais com a do alto Rio Grande (ambas localizadas em regiões sob influência da Mata Atlântica, muito embora as espécies mais importantes não sejam as mesmas. Em termos pedológicos a floresta de Itambé apresenta os solos mais intemperizados, lixiviados e profundos, apesar de seu relevo íngreme, devido ao material constitutivo dos mesmos ter sofrido intenso processo de alteração anterior ao atual ciclo pedogênico.A floristic and phytosociological survey of the tree commnunity

  5. Changes in structure and composition of evergreen forests on an altitudinal gradient in the Venezuelan Guayana Shield

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    Lionel Hernández

    2012-03-01

    Full Text Available There have been several ecological studies in forests of the Guayana Shield, but so far none had examined the changes in structure and composition of evergreen forests with altitude. This study describes and analyzes the structure, species composition and soil characteristics of forest stands at different altitudinal zones in Southeastern Venezuelan Guayana, in order to explain the patterns and the main factors that determine the structure and composition of evergreen forests along the altitudinal gradient. Inventories of 3 948 big (>10cm DBH and 1 328 small (5-10cm DBH woody stems were carried out in eleven plots, ranging from 0.1 to 1.0ha, along a 188km long transect with elevations between 290 and 1 395masl. It has been found that 1 hemiepihytes become more dominant and lianas reduce their dominance with increasing altitude and 2 the forest structure in the study area is size-dependent. Five families and 12 genera represented only 9% of the total number of families and genera, respectively, recorded troughout the gradient, but the two groups of taxa comprised more than 50% of the Importance Value (the sum of the relative density and the relative dominance of all measured stems. Moreover, the results suggest that low species richness seems to be associated with the dominance of one or few species. Stand-level wood density (WD of trees decreased significantly with increasing elevation. WD is an indicator of trees’life history strategy. Its decline suggests a change in the functional composition of the forest with increasing altitude. The Canonical Correspondence Analysis (CCA indicated a distinction of the studied forests on the basis of their altitudinal levels and geographic location, and revealed different ecological responses by the forests, to environmental variables along the altitudinal gradient. The variation in species composition, in terms of basal area among stands, was controlled primarily by elevation and secondarily by rainfall

  6. Plantas lenhosas da Floresta Ombrófila Mista do Parque Municipal das Araucárias – Guarapuava (PR / Woody plants of the Mixed Ombrophylous Forest the Araucaria Municipal Park - Guarapuava (PR

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    Juliano Cordeiro

    2011-12-01

    Full Text Available Foi realizado o levantamento florístico das espécies lenhosas da uma área de 41 ha de Floresta Ombrófila Mista (FOM do Parque Municipal das Araucárias, localizado em Guarapuava (PR com coordenadas geográficas 25º 20’ 44” e 25º 21’ 35” de latitude Sul e 51º 27’ 31” e 51º 28’ 16” de longitude Oeste. O patamar altimétrico do Parque fica em torno dos 1070 m.s.n.m., o predomínio é relevo suave ondulado e solo do tipo Latossolo Bruno Ácrico Húmico. O levantamento foi realizado de mar/04 a out/08 com média de uma visita a cada vinte dias. Foram identificadas 107 espécies, pertencentes a 77 gêneros e 41 famílias botânicas, distribuídos nas formas biológicas de microfanerófitos (n=44, mesofanerófitos (n=39, nanofanerófitos (n=15, lianas (n=8 e megafanerófito (n=1. As famílias que apresentaram maior diversidade foram: Solanaceae com 12 espécies, Myrtaceae com nove, Fabaceae com oito, Bignoniaceae com seis, Asteraceae com cinco. Estas famílias agruparam 37,4% das espécies, enquanto que as outras 38 famílias responderam por 62,6% da diversidade. Aproximadamente 60,5% das famílias são representadas por apenas uma espécie cada. Considerando o critério a frequência Allophylus edulis (A. St.-Hil., A. Juss & Cambess. Hieron. ex Niederl., Casearia decandra Jacq., Cedrela fissilis Vell., Cinnamodendron dinisii Schwacke, Jacaranda puberula Cham., Matayba elaeagnoides Radlk., Ocotea porosa (Nees & Mart. Barroso, Ocotea puberula (Rich. Nees, Ocotea pulchella (Nees Mez, Schinus terebinthifolius Raddi, Vernonanthura discolor (Spreng. H. Rob. e Zanthoxylum rhoifolium Lam. podem ser consideradas espécies companheiras da Araucaria angustifolia (Bertol. Kuntze na florística da FOM. Os dados quanto ao total de espécies da FOM ainda são incompletos. Faz-se necessário que levantamentos sejam direcionados aos escassos remanescentes que restam e que o critério amostral estenda-se sobre todas as formas biol

  7. Forest structure of artificial islands in the Tucuruí dam reservoir in northern Brazil: a test core-area model Estrutura da floresta em ilhas artificiais no reservatório da usina hidrelétrica de Tucuruí, Brasil: um teste do modelo de área nuclear

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    Leandro V. Ferreira

    2012-06-01

    Full Text Available Construction of hydroelectric dams in tropical regions has been contributing significantly to forest fragmentation. Alterations at edges of forest fragments impact plant communities that suffer increases in tree damage and dead, and decreases in seedling recruitment. This study aimed to test the core-area model in a fragmented landscape caused by construction of a hydroelectric power plant in the Brazilian Amazon. We studied variations in forest structure between the margin and interiors of 17 islands of 8-100 hectares in the Tucuruí dam reservoir, in two plots (30 and >100m from the margin per island. Mean tree density, basal area, seedling density and forest cover did not significantly differ between marginal and interior island plots. Also, no significant differences were found in liana density, dead tree or damage for margin and interior plots. The peculiar topographic conditions associated with the matrix habitat and shapes of the island seem to extend edge effects to the islands' centers independently of the island size, giving the interior similar physical microclimatic conditions as at the edges. We propose a protocol for assessing the ecological impacts of edge effects in fragments of natural habitat surrounded by induced (artificial edges. The protocol involves three steps: (1 identification of focal taxa of particular conservation or management interest, (2 measurement of an "edge function" that describes the response of these taxa to induced edges, and (3 use of a "Core-Area Model" to extrapolate edge function parameters to existing or novel situations.A construção de usinas hidrelétricas em regiões tropicais tem contribuído significativamente para a fragmentação da floresta. As alterações nas bordas de fragmentos florestais causam profundos impactos na comunidade de plantas, tais como, o aumento em de árvores mortas ou danificadas e a diminuição do recrutamento de plântulas. Este estudo tem como objetivo testar o

  8. Close relationship between diameters at 30cm height and at breast height (DBH Relações entre diametros a 30 cm de altura e à altura do peito (DAP

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    Christoph Gehring

    2008-01-01

    Full Text Available This paper proposes the establishment of a second diameter measuring standard at 30cm shoot extension ('diam30' as input variable for allometric biomass estimation of small and mid-sized plant shoots. This diameter standard is better suited than the diameter at breast height (DBH, i.e. diameter at 1.30m shoot extension for adequate characterization of plant dimensions in low bushy vegetation or in primary forest undergrowth. The relationships between both diameter standards are established based on a dataset of 8645 tree, liana and palm shoots in secondary and primary forests of central Amazonia (ranging from 1-150mm dbh. Dbh can be predicted from the diam(30 with high precision, the error introduced by diameter transformation is only 2-3% for trees and palms, and 5% for lianas. This is well acceptable for most field study purposes. Relationships deviate slightly from linearity and differ between growth forms. Relationships were markedly similar for different vegetation types (low secondary regrowth vs. primary forests, soils, and selected genera or species. This points to a general validity and applicability of diameter transformations for other field studies. This study provides researchers with a tool for the allometric estimation of biomass in low or structurally heterogeneous vegetation. Rather than applying a uniform diameter standard, the measuring position which best represents the respective plant can be decided on shoot-by-shoot. Plant diameters measured at 30cm height can be transformed to dbh for subsequent allometric biomass estimation. We recommend the use of these diameter transformations only for plants extending well beyond the theoretical minimum shoot length (i.e., >2m height. This study also prepares the ground for the comparability and compatability of future allometric equations specifically developed for small- to mid-sized vegetation components (i.e., bushes, undergrowth which are based on the diam(30 measuring standard

  9. Diversidade de angiospermas e espécies medicinais de uma área de Cerrado

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    A.F. SILVA

    2015-01-01

    Full Text Available RESUMO Este trabalho teve como objetivo conhecer a diversidade vegetal de uma área de Cerrado em Prudente de Morais, MG, bem como suas indicações medicinais. Foram feitas nove excursões à reserva da Fazenda Experimental Santa Rita da Empresa de Pesquisa Agropecuária de Minas Gerais (FESR/EPAMIG (19°26’20”’ S e 44°09’15”’ W. O material vegetal coletado foi herborizado, identificado e incorporado ao acervo do Herbário PAMG/EPAMIG. O sistema de classificação utilizado foi o APG III. Após a identificação, realizou-se uma pesquisa bibliográfica buscando dados sobre a utilização medicinal das espécies. Coletaram-se 108 espécies pertencentes a 47 famílias. As famílias mais representativas foram: Fabaceae, com 16 espécies, Myrtaceae com sete espécies, Asteraceae e Rubiaceae com seis espécies cada, Malpighiaceae e Solanaceae com cinco espécies cada, Erythroxylaceae, Euphorbiaceae e Vochysiaceae, com quatro espécies cada, Anacardiaceae, Apocynaceae, Lamiaceae e Sapindaceae com três espécies cada, Annonaceae, Arecaceae, Bignoniaceae, Celastraceae e Primulaceae com duas espécies cada. Vinte e nove famílias foram monoespecíficas. Das 108 espécies, 39 são árvores (36%, 43 arbustos (40%, seis subarbustos (5,5%, 14 lianas (13% e seis são ervas (5,5%. Sessenta e seis (61% espécies pertencentes a 39 famílias (83% são utilizadas popularmente, para o tratamento de alguma doença. As famílias com maior número de espécies medicinais foram: Fabaceae com oito espécies; Rubiaceae com cinco espécies e Solanaceae com quatro espécies. As espécies que apresentaram mais finalidades terapêuticas foram: Brosimum gaudichaudii Trécul (Moraceae, Caryocar brasiliense Cambess. (Caryocaraceae, Cochlospermum regium (Mart. ex Schrank Pilg. (Bixaceae, Croton urucurana Bail. (Euphorbiaceae, Gomphrena officinalis Mart. (Amaranthaceae, Hymenaea stigonocarpa Mart. ex Hayne (Fabaceae, Lithrea molleoides (Vell. Engl. (Anacardiaceae

  10. Composição florística da floresta estacional decídua montana de Serra das Almas, CE, Brasil Flora of seasonal deciduous montane forest at Serra das Almas, Ceará State, Brazil

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    Jacira Rabelo Lima

    2009-09-01

    life form, comprising 87% of the species. About 72% of the species were trees and shrubs, 15% were lianas, 6% understory shrubs and 7% herbs. A cluster analysis of the woody flora of the 14 areas, using the Jaccard index and a posteriori group averages, indicated the formation of groups as a function of geographical proximity of the areas. However, this effect was not significant, according to the Mantel test, demonstrating floristic heterogeneity even in neighboring areas. The flora of the forest at Serra das Almas was most similar to that of the vegetation found atop the Ibiapaba plateau.

  11. Chuva de sementes em Floresta Estacional Semidecidual em Viçosa, MG, Brasil Seed rain in a seasonal semideciduous forest at Viçosa, Minas Gerais State, Brazil

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    Érica Pereira de Campos

    2009-06-01

    Full Text Available Este estudo objetivou avaliar a composição florística, a densidade e a freqüência de sementes, em 25 coletores, em um trecho de Floresta Estacional Semidecidual. Além disso, classificar os táxons quanto à forma de vida, às síndromes de dispersão e, nas arbóreas, quanto ao estádio sucessional e verificar a similaridade florística entre as espécies identificadas na chuva de sementes e as espécies arbóreas localizadas nas mesmas parcelas dos coletores. O trabalho foi realizado entre dezembro/2004 a novembro/2006. Foram reconhecidos 43 táxons, sendo que Leguminosae foi representada por 11 espécies. A forma de vida dominante foi arbórea (63,1%, as lianas foram representadas por 28,9% das espécies amostradas, as herbáceas por 5,3% e as arbustivas por 2,6%. A densidade média de sementes no primeiro ano foi de 113,92 sementes.m-2 e no segundo de 2.603,84 sementes.m-2. Essas diferenças demonstraram heterogeneidade espacial e temporal da chuva de sementes. A similaridade florística encontrada pelo índice de Sørensen entre as espécies da chuva de sementes e as espécies arbóreas do trecho do fragmento estudado foi de 32%, valor considerado baixo (This study aims to evaluate the floristic composition, density and frequency of seeds in 25 traps in a section of seasonal semideciduous forest, as well as classify taxons as to life form, dispersal syndromes, and succession phase of the tree species, and verify floristic similarities between seed rain species and tree species located in the same plots. The work was carried out from December/2004 to November/2006. Forty three taxons were recognized and Leguminosae was represented by 11 species. The dominant life form was arboreal (63.1%, climbers were represented by 28.9% of the sampled species, herbs by 5.3% and shrubs by 2.6%. Mean seed density in the first year was 113.92 seeds.m-2 and 2603.84 seeds.m-2 in the second year. These differences showed spatial and seasonal heterogeneity

  12. Floração, frutificação e síndromes de dispersão de uma comunidade de floresta de brejo na região de Campinas (SP Flowering, fruiting and dispersal syndromes of a wet forest community

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    Andréa Pozetti Spina

    2001-12-01

    Full Text Available Dados referentes as fenofases de floração e de frutificação, das espécies de uma floresta de brejo, foram analisados quanto à época de ocorrência e suas possíveis variações nos diferentes hábitos. Os dados foram obtidos mensalmente durante o levantamento florístico das plantas vasculares. Foram registrados: o hábito da espécie, a presença ou ausência de flores e/ou frutos, a cor e a textura dos frutos. Os dados de frutificação foram agrupados quanto à deiscência e textura dos frutos, e estes quando secos e deiscentes, foram analisados quanto à presença ou não de arilo ou arilóide, e de mecanismos explosivos de deiscência. Através desta análise as espécies foram classificadas quanto às síndromes de dispersão. Na comunidade a floração e a frutificação ocorreram durante o ano todo com um pico em junho, comum à maioria das espécies. Quando as espécies são agrupadas pelo hábito, são observadas diferenças quanto à época de ocorrência de seus picos de floração e de frutificação ao longo do ano. A síndrome de dispersão mais freqüente foi a zoocoria (75% das espécies, seguida pela anemocoria (27% e pela autocoria (l6%. As espécies arborescentes e arbustivas apresentaram as maiores porcentagens de zoocoria (75% e 57% respectivamente enquanto que, 63% das espécies de lianas apresentaram anemocoria.Flowering and fruiting phenophase data of species from a wet forest community were analyzed. The data were collected monthly during the floristic study. Habit, the presence or absence of flowers and/or fruits, and the color and texture of fruits were registered. Fruiting data were grouped in relation to dehiscence type and texture. When dry and dehiscent the fruits were discriminated by the presence of an aril or arillode or by the explosive dehiscence. By these analyses the species were classified according to their dispersal syndromes. In the community flowering and fruiting occurred during all the year

  13. Association between sarcopenia and quality of life in quilombola elderly in Brazil

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    Silva Neto LS

    2016-04-01

    Full Text Available Luiz Sinésio Silva Neto,1–3 Margô GO Karnikowski,2 Neila B Osório,3 Leonardo C Pereira,2 Marcilio B Mendes,1 Dayani Galato,2 Liana B Gomide Matheus,4 João Paulo C Matheus2,4 1School of Medicine, Federal University of Tocantins, Palmas, Tocantins, 2Graduate Program in Health Sciences and Technology, Ceilândia College, University of Brasilia, Federal District, 3Graduate Program in Education, Federal University of Tocantins, Palmas, Tocantins, 4School of Physiotherapy, Ceilândia College, University of Brasília, Federal District, Brazil Introduction: Currently, there is no single consensual definition of sarcopenia in the literature. This creates a challenge for the evaluation of its prevalence and its direct or indirect impact on the quality of life of elderly populations of different races and ethnicities. Furthermore, no studies as yet have analyzed these variables in populations of elderly subjects of the "quilombola" ethnic group. Objective: We aimed to verify the association between sarcopenia and quality of life in quilombola elderly using the Baumgartner and the European Working Group on Sarcopenia in Older People (EWGSOP criteria. Methods: This was a cross-sectional study of 70 male and female participants (mean age: 65.58±6.67 years. Quality of life was evaluated using the multidimensional 36-item Short-Form Health Survey (SF-36 of the Medical Outcomes Study. Sarcopenia was diagnosed according to the Baumgartner cutoff for appendicular skeletal muscle mass and the criteria recommended by the EWGSOP. Muscle mass and fat mass percentages were analyzed by dual-energy X-ray absorptiometry, while handgrip strength (HGS was evaluated using a hand-held dynamometer. Physical performance was assessed through a gait speed test. Results: The prevalence of sarcopenia was 15% according to the Baumgartner cutoff and 10% according to EWGSOP criteria. Quilombola elderly classified as physically active or very active were at least six times less

  14. Efeitos da sucessão florestal sobre a anurofauna (Amphibia: Anura da Reserva Catuaba e seu entorno, Acre, Amazônia sul-ocidental Effect of the forest succession on the anurans (Amphibia: Anura of the Reserve Catuaba and its periphery, Acre, southwestern Amazonia

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    Vanessa M. de Souza

    2008-03-01

    Full Text Available O trabalho teve como objetivo verificar a abundância, riqueza e a composição da anurofauna em diferentes estágios sucessionais em uma floresta do Acre (10º04'S, 67º37'W e seu entorno. Os dados foram obtidos entre agosto de 2005 a abril de 2006 em doze parcelas, localizadas em três áreas diferentes da floresta. Em cada área foram escolhidos quatro tipos de ambientes: floresta primária (mata, floresta secundária (capoeira, entorno (matriz e floresta secundária (sucessão. Observou-se a presença de 27 espécies distribuídas em sete famílias. Maior abundância foi constatada na matriz dois e capoeira três, e a menor na sucessão um. A maior riqueza foi constatada na matriz dois, com o maior número de espécies exclusivas. A abundância de anuros correlacionou-se significativamente com a circunferência das árvores e lianas. A riqueza de anuros correlacionou-se marginalmente com a circunferência das árvores. A maior riqueza em ambientes de capoeiras e matriz pode ser explicada em grande parte pela existência nesses locais de poças d'água, maior heterogeneidade estrutural e poderem constituir estágios intermediários de perturbação. Esses estágios têm sido apontados como fatores que promovem e mantêm níveis elevados de biodiversidade. Ambientes com níveis intermediários de perturbação são importantes para a conservação da anurofauna.The objective of this work it was verify the abundance, richness, and the anuran composition in plots of vegetation of different succession stages in a forest and the matrix that surrounds it, of Acre (10º04'S, 67º37'W. The sampling was carried out between August 2005 and April 2006 in twelve plots located in three different sites in the forest. In each site four kinds of environments were chosen: primary forest (wood, secondary forest (capoeira, periphery (matrix and secondary forest (succession. A total of twenty-seven species distributed in seven families was found. Greater

  15. Avaliação do efeito de borda da Reserva Biológica de Pindorama, SP

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    M. T. V. N. Abdo

    2015-10-01

    Full Text Available Caracterizou dois fragmentos de floresta estacional semidecidual da Reserva Biológica de Pindorama, SP. Em 65 parcelas de 400 m2 avaliou-se: grau de infestação na parcela, distância da borda, altura, área basal e grau de infestação das quatro maiores árvores e num quadrante sorteado avaliou-se solo, a altitude, o número de espécies, o número, a área basal e a altura de todos indivíduos arbóreos com diâmetro a altura do peito (DAP ≥ a 5 cm e a fitossociologia. O agrupamento hierárquico dividiu as parcelas em dois grupos onde determinou-se valores médios das variáveis, Índices de diversidade de espécies (H’ e Coeficiente de equabilidade (J e a similaridade entre os grupos com o Índice de similaridade de Jaccard (ISJ. O agrupamento hierárquico, k-médias e componentes principais caracterizaram grupos de parcelas semelhantes e as variáveis com maior poder de discriminação foram: altura das quatro maiores árvores, número de indivíduos por parcelas, área basal total, infestação por parcelas, número de espécies. No Grupo 2 houve maior infestação de plantas invasoras e lianas nas quatro maiores árvores e menor distância das parcelas da borda com mais parcelas sob efeito de borda (31,75%. O Grupo 1  teve menor porcentagem  de parcelas sob efeito de borda (22,22%. Edge effect evaluation of Pindorama Biological Reserve-SPAbstract: Edge effect evaluation in two forest remnants in the Biological Reserve Pindorama, SP, in 65 plots of 400 m2, using data of: degree of infestation in the plot, distance from edge, height, basal area and degree of infestation of the four largest trees. In a random quadrant were evaluated soil and altitude, species number, number, basal area and height of trees with diameter at breast height (DBH ≥ 5 cm and phytosociological describers: density absolute and relative, relative dominancy, frequency relative and absolute , importance value, species diversity index (H ', evenness

  16. The Red de Monitoreo de BosquesAndinos: A communication platform for science and policy in the Andean countries

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    Baez, S.; Cuesta, F. X.; Malizia, A.; Carilla, J.; Bustamante, M.; Yepes, A.

    2013-05-01

    A workshop held in October 2012 in Lima, Peru, brought together more than 40 scientists and policy makers working in Andean forest ecosystems, one of the richer and most threatened ecosystems of the world. Among the various results of the workshop, there is the formation of the network "Red de Bosques Andinos". The goals of the network include to stimulate scientific research in Andean forest ecosystems by promoting collaboration among scientists, and to serve as a platform to facilitate applied research and communication between scientists and policy makers. Current members of the network include scientists of Argentina, Colombia, Ecuador, Germany, Peru, USA, and representatives of Ministries of Environment and the National Climate Change Adaptation Programs of Colombia, Bolivia, Ecuador, and Peru. The network has started to work in two critical documents for the region. The first one is an extended protocol to monitor diversity and carbon in Andean forests. This protocol, partly based on unpublished efforts, has been developed by the Instituto de Ecología Regional, Universidad de Tucuman, Argentina, and has been revised and improved by experts working in the Andes. The document describe methods to document ecological changes that take place over mid- and long periods of time. It focuses on monitoring changes on the diversity and growth of trees, shrubs and lianas, cover of herbaceous species, and carbon content in forests. This extended protocol will be a useful tool for students and researchers interested in conducting long-term ecological research. Moreover, the use of this tool will produce standardized data needed to understand ecological processes that take place at large spatial scales. The document will be freely available at www.condesan.org. The second document consists of an analysis of the dynamics of trees and carbon in the Andean region. The members of the network have contributed with data of more than 70 permanent forest plots located from

  17. Aspectos florísticos de 13 hectares da área de Cachoeira Porteira-PA Floristic composition of 13 hectars in Cachoeira Porteira, Pará State

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    Diógenes de Andrade Lima Filho

    2004-09-01

    addition to the identification of vegetation different types. The 13 surveyed forest hectares support 4.583 individuals, comprising trees, palms and lianas with DAP > 10cm, distributed in 359 species, 217 genera and 55 families (Three measures of ecological importance were totaled to give an Importance Value Index (IVIE of the species. The two species with the highest IVIE, in all surveyed area, were Eschweilera coriacea (DC S. A. Mori, with 15,24% and Micropholis guyanensis (A. DC Pierre, with 10,87%. Families presenting the highest Importance Value Indexes (IVIF in the 13 hectares, were Caealpiniaceae (31,45% and Sapotaceae (30,34%.

  18. Ayahuasca: uma revisão dos aspectos farmacológicos e toxicológicos

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    Ana Paula Salum Pires

    2010-06-01

    Full Text Available A ayahuasca é uma bebida psicoativa originariamente utilizada em rituais de tribos indígenas da região amazônica. Esta bebida é preparada pela infusão de caules da Banisteriopsis caapi Morton, que contém β-carbolinas que são inibidoras da monoaminoxidase (MAO, e de folhas da Psychotria viridis Ruiz & Pavón, que contém o alucinógeno N,N-dimetiltriptamina (DMT. A enzima MAO degrada a DMT no fígado e intestino. No Brasil, a ayahuasca tem sido incorporada em rituais de grupos sincréticos religiosos e seu uso dentro do contexto religioso é amparado por lei federal. Atualmente, esses grupos têm se espalhado na Europa e Estados Unidos, chamando a atenção de pesquisadores internacionais quanto aos efeitos da ayahuasca. Estudos têm indicado que a ayahuasca poderia ter aplicações terapêuticas como no tratamento da farmacodependência e até sugerem seu uso seguro por adultos sadios. Entretanto, poucos estudos têm sido conduzidos para melhor avaliação de suas propriedades. O objetivo do artigo é mostrar uma revisão geral da história até as recentes descobertas envolvendo a farmacologia e a toxicologia da ayahuasca. Palavras-chave: Ayahuasca. Alucinógenos. Dimetiltriptamina. Carbolinas. ABSTRACT Ayahuasca: a review of pharmacological and toxicological aspects Ayahuasca (or caapi in Brazil is a psychoactive plant beverage initially used by shamans in religious rituals practiced by indigenous peoples in the Amazon region. It is prepared by infusing the pounded stems of Banisteriopsis caapi Morton, a liana which contains betacarbolines, alkaloids that are potent monoamine oxidase (MAO inhibitors, together with the leaves of Psychotria viridis Ruiz & Pavón, which contains the psychedelic agent N,N-dimethyltryptamine (DMT. The enzyme MAO normally degrades DMT in the liver and gut. In Brazil, the use of ayahuasca within religious ceremonies is protected by law and it has been incorporated into rituals of syncretic religious groups

  19. Alcaloides e o chá de ayahuasca: uma correlação dos "estados alterados da consciência" induzido por alucinógenos Alkaloids and ayahuasca tea: a correlation of hallucinogen-induced "altered states of consciousness"

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    P.A. De Souza

    2011-01-01

    of the liana Banisteriopsis caapi together with the mixture of leaves of Psychotria, principally P. viridis. In Brazil, it occupies a central position in ethnomedicine. The chemical nature of its active constituents and the manner of its use makes it relevant to contemporary studies in neuropharmacology, neurophysiology, and psychiatry. Hallucinogens and related substances constitute a powerful experimental basis to investigate the biological correlation of altered states of consciousness. The study of hallucinogens in humans is important because these substances affect a number of brain functions that typically characterize the human mind, including cognition, volition, ego, and self-consciousness. The several manifestations of "ego disorders" are especially prominent psychedelic features that naturally lead to psychoses. In the present review, we summarize some of the important aspects in the study of ayahuasca tea in humans, its indications and contraindications for therapeutic and religious purposes.

  20. Uncaria tomentosa extract alters the catabolism of adenine nucleotides and expression of ecto-5'-nucleotidase/CD73 and P2X7 and A1 receptors in the MDA-MB-231 cell line.

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    Santos, Karen Freitas; Gutierres, Jessié Martins; Pillat, Micheli Mainardi; Rissi, Vitor Braga; Santos Araújo, Maria do Carmo Dos; Bertol, Gustavo; Gonçalves, Paulo Bayard Dias; Schetinger, Maria Rosa Chitolina; Morsch, Vera Maria

    2016-12-24

    Uncaria tomentosa (Willd.) DC. (Rubiaceae) (Ut), also known as cat's claw, is a woody liana widely spread throughout the Amazon rainforest of Central and South America, containing many chemical constituents such as oxindole alkaloids, which are responsible for various biological activities. Since ancient times, the indigenous people of Peru have used it as a bark infusion for the treatment of a wide range of health problems gastric ulcers, arthritis and rheumatism. Recently, Ut is distributed worldwide and used as an immunomodulatory and anti-inflammatory herbal remedy. Additionally, U. tomentosa also has antitumural activity. However, little is known about the action of U. tomentosa on the purinergic system mechanisms, which is involved in tumor progression. Considering the pharmacological properties of U. tomentosa, we sought to evaluate the hydroalcoholic extract U tomentosa is able to influence the purinergic system in breast cancer cells, MDA-MB-231. Through the activity and expression of ectonucleotidases (NTPDase - CD39; Ecto-5'-nucleotidase - CD73) and purinergic repceptores (P2X7 and A1). A hydroalcoholic extract was prepared in two concentrations, 250 and 500μg/mL. (Ut250; Ut500). The effect of these concentrations on the activity and expression of ectonucleotidases, as well as on the density of purinergic receptors were investigated in MDA-MB-231 breast cancer cells. Cells were treated with the hydroalcoholic extract of Uncaria tomentosa and/or doxorubicin (Doxo 1μM; Ut250+Doxo; Ut500+Doxo) for 24h. Although the results were not significant for the hydrolysis of the ATP, they presented an increase in the ADP hydrolysis in the Ut500+Doxo group when compared to the control group. Additionally, the activity of 5'-nucleotidase was inhibited in all groups when compared with the untreated group of cells. Inhibition of the enzyme was more evident in groups with U. tomentosa per se. The expression of CD39 was increased in the Ut250 and Ut250+Doxo groups when

  1. The impact of coping on the somatic and mental status of patients with COPD: a cross-sectional study

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    Papava I

    2016-06-01

    Full Text Available Ion Papava,1 Cristian Oancea,2 Virgil Radu Enatescu,1 Ana Cristina Bredicean,1 Liana Dehelean,1 Radu Stefan Romosan,1 Bogdan Timar3 1Department of Neurosciences – Discipline of Psychiatry, 2Department of Infectious Diseases, 3Department of Functional Sciences, “Victor Babes” University of Medicine and Pharmacy, Timisoara, Romania Background and objectives: Chronic obstructive pulmonary disease (COPD is one of the most debilitating somatic diseases, having anxiety and depression frequently as comorbidities. The coping style, the way in which the subject manages to control the difficult and stressful situations of life, can influence its evolution and also the existence of the comorbidities. In this study, coping styles in a group of subjects with COPD and their association with the intensity of depressive and anxiety symptoms as well as medical determinants were identified. Materials and methods: In this cross-sectional study, 28 male patients with COPD risk class D were enrolled. The patients performed spirometry tests, Borg scale, 6-minute walking test, Hospital Anxiety and Depression Scale, and COPE Inventory were recorded. Results: According to their higher coping subscale score, the depression score was the highest in patients with avoidance-type coping and the lowest in patients with problem-focused coping (11.0 vs 5.6; P=0.042, respectively, patients with social support-focused coping having the highest anxiety score in contrast to patients with emotion-focused coping, which had the lowest anxiety score (11.6 vs 5.0; P=0.006. Regarding respiratory parameters, significant differences were present for the variation of the medians between the four groups only for forced vital capacity (FVC% (the lowest FVC% was in patients with predominant social support-focused coping and the highest in patients with problem-focused coping and 6-minute walking test (% (the lowest score for patients with social support-focused coping and the highest

  2. Diversidad, estructura y regeneración de la selva tropical estacionalmente seca de la Península de Yucatán, México

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    Angélica María Hernández-Ramírez

    2015-09-01

    Full Text Available Las selvas tropicales estacionalmente secas son consideradas como uno de los ecosistemas más amenazados en las tierras bajas de la región tropical. El objetivo de este estudio fue caracterizar la composición florística, riqueza, diversidad, estructura y regeneración de una selva tropical estacionalmente seca constituida por selva mediana, vegetación secundaria y selva baja inundable localizada en el noroeste de la Península de Yucatán, México. Se utilizó el protocolo de muestreo estandarizado propuesto por Gentry (0.1 ha por tipo de vegetación en 2007 con la finalidad de comprar los resultados obtenidos en este estudio con respecto a otras selvas estacionalmente secas en Mesoamérica. Se registraron un total de 77 especies pertenecientes a 32 familias de plantas. Fabaceae y Euphorbiaceae fueron las familias con el mayor número de especies observadas en los tres tipos de vegetación estudiados. Se observó un alto recambio de especies a nivel del paisaje (Índice de Similitud de Sorensen; 0.19-0.40. Las especies no-regenerativas fueron dominantes (50-51 %, seguida de las especies regenerativas (30-28 % y colonizadoras (14-21 % en los tres tipos de vegetación estudiados. Zoocoria fue el modo de dispersión comúnmente observado en el área de estudio. El 88 % de las especies observadas en el área de estudio se distribuyen en Centro América. La selva del noroeste de la Península de Yucatán compartió diversos atributos florísticos a los observados en otras selvas estacionalmente secas de Meosoamérica. Las características estructurales de la vegetación (número de individuos y área basal, así como el número de especies de lianas registradas en este estudio se asociaron a los eventos de alteración natural ocurridos recientemente en el área de estudio. Los resultados obtenidos en este estudio sugieren que la selva del noroeste de la Península de Yucatán ha sido resiliente a los eventos de alteración natural (huracanes, lo

  3. Pharmacokinetic equivalence study of two formulations of the anticonvulsant pregabalin

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    Tjandrawinata RR

    2015-04-01

    Full Text Available Raymond R Tjandrawinata,1 Effi Setiawati,2 Ratih Sofia Ika Putri,2 Vincent Angga Gunawan,2 Fenny Ong,1 Liana W Susanto,1 Dwi Nofiarny11Dexa Laboratories of Biomolecular Sciences, Cikarang, West Java, Indonesia; 2PT Equilab International Bioavailability and Bioequivalence Laboratory, Jakarta, IndonesiaPurpose: The present study was conducted to evaluate whether the bioavailability of pregabalin capsules 150 mg manufactured by PT Dexa Medica was equivalent to the reference formulation.Methods: This was a randomized, open-label, two-period, two-sequence, and crossover study under fasting condition, with a 1-week washout period. Plasma concentrations of pregabalin from 20 subjects were determined by using a validated liquid chromatography with tandem mass spectrometry (LC-MS/MS detection method. Pharmacokinetic parameters assessed in this study were: area under the plasma concentration–time curve from time zero to last observed quantifiable concentration (AUC0–t, area under the plasma concentration–time curve from time zero to infinity (AUC0–∞, maximum plasma concentration (Cmax, time to maximum plasma concentration (tmax, and terminal half-life (t1/2. The 90% confidence intervals (CIs for the geometric mean ratios of test formulation/reference formulation were calculated for the AUC and Cmax parameters; while tmax difference was analyzed nonparametrically on the original data using the Wilcoxon matched-pairs test, and t1/2 difference was analyzed using Student's paired t-test.Results: The mean (standard deviation [SD] AUC0–t, AUC0–∞, Cmax, and t1/2 of pregabalin from the test formulation were 27,845.86 (4,508.27 ng·h/mL, 28,311.70 (4,790.55 ng·h/mL, 3,999.71 (801.52 ng/mL, and 5.66 (1.20 hours, respectively; while the mean (SD AUC0–t, AUC0–∞, Cmax, and t1/2 of pregabalin from the reference formulation were 27,398.12 (4,266.28 ng·h/mL, 27,904.24 (4,507.31 ng·h/mL, 3,849.50 (814.50 ng/mL, and 5.87 (1.25 hours, respectively

  4. Análisis florístico del Parque Nacional Natural Amacayucu e Isla Mocagua, Amazonas (Colombia

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    Rudas L. Agustín

    1998-11-01

    Full Text Available A floristic study of the Parque Nacional Natural Amacayacu and Isla Mocagua shows 1348 species, 574 genera and 128 families of vascular plants; 82% of the species are dicotyledons, 14% monocotyledons, 3.7% ferns and ca. 0.2% gymnosperms. Leguminosae, Rubiaceae, Melastomataceae, Moraceae and Annonaceae represent 33% of the dicotyledonous species, whereas Araceae, Arecaceae and Poaceae are the main monocotyledonous families. Most families are Gondwanaland elements with sorne Laurasian elements; others are of unknown origino The main habit is represented by trees and shrubs (47% and 19% of the species, 25% are vines and herbs, 9% epiphytes and hemiepiphytes, and En un estudio florístico en cinco sectores del Parque Nacional Natural Amacayacu y en la Isla Mocagua, se encontraron 1348 especies de plantas vasculares, distribuidas en 574 géneros y 128 familias; 82% de las especies corresponden a dicotiledóneas, 14% a monocotiledóneas, 3.7% a pteridófitos y ca. de 0.2% a  gimnospermas. Las principales familias fueron Leguminosae, Rubiaceae, Melastomataceae, Moraceae y Annonaceae  (dicotiledóneas, y Araceae, Arecaceae y Poaceae (monocotiledóneas. La mayoría de las familias corresponde a elementos de Gondwana con algunos elementos Laurásicos y otros sin origen asignado. El mayor número de las especies tienen hábito arbóreo o arbustivo (47% y 19% respectivamente, ca. del 25% de las especies son lianas y hierbas, 9% epífitas y hemiepífitas, mientras que las parásitas y saprófitas apenas representan < 1%. Los bosques de tierra firme presentan casi el doble de especies de arbustos, hierbas y epífitos que las planicies inundables. Algunos sectores del Parque relativamente distantes entre sí presentan una gran similaridad en cuanto a composición florística, hecho que puede atribuirse principalmente al tipo de agua (blanca, negra o mixta que los irriga. Una comparación con regiones similares en el corredor pacífico, el piedemonte amaz

  5. Padrões de floração e frutificação de árvores da Amazônia Maranhense Flowering and Fruiting Patterns of the Maranhense Amazon Rainforest Trees

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    Francisca Helena Muniz

    2008-12-01

    facilitate the understanding of species behavior as a result of ecosystem changes, further reflecting on the annual allotment of specific resources. The aim of the present study was to define the general patterns, flowering and fruiting seasonality from a community in two forest areas of the Maranhense Amazon Rainforest: a non-disturbed area and another submitted to selective logging. The vegetation is composed of Amazon forest lianas alternating between dense and open high biomass forest. Average annual temperature varies between 24.5O C and 26.0O C, with precipitation ranging from 1400 mm to 1800 mm, and a dry season between June and November. Flowering and fruiting of 89 species were analyzed from August 1994 to June 1996. The species were grouped as follows: sub-dossal, upper strata, and trees occurring in both strata. Comparison was made between groups (strata, types of forest and mechanisms for dispersal and possible correlations with rainfall were investigated. Fifteen studied species were solely from the lower strata, and 63 from the upper forest strata; 17 species were recorded only in native forest and 37 in managed forest. Most species (62.9 % is zoochorous. Flowering and fruiting take place throughout the year with flowering peak from October to December and fruiting peaks from March to July and from October to December. The results showed a great synchrony in flowering and fruiting of individuals, and confirm the relationship between these cases and the variation in rainfall throughout the year, and that plants of different environments exhibit phonological behavior different. The observed flowering and fruiting patterns were similar between the areas and comparable to other studies in the Amazon Rainforest.

  6. La leishmaniasis: conocimientos y prácticas en poblaciones de la costa del Pacífico de Colombia Leishmaniasis: knowledge and practices in populations of the Pacific coast of Colombia

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    Diana María Isaza

    1999-09-01

    ún pudo observarse en 102 de 155 respuestas. No se encontraron diferencias atribuibles al género en los conocimientos y prácticas acerca de la leishmaniasis, con excepción de la falta de conocimiento de las mujeres acerca del tratamiento de la enfermedad. Esta investigación resalta la importancia de estudiar los conocimientos y prácticas de los habitantes locales antes de diseñar y organizar programas educativos sobre el control de la leishmaniasis.In 1997 a descriptive study with a qualitative emphasis was carried out in order to document, by gender, the knowledge and practices related to cutaneous leishmaniasis among inhabitants 14 years and older in seven communities of Colombia's Pacific coastal department of Chocó. Since the control activities carried out by the Chocó Sectional Health Services had not had the desired results, the residents of the region were at high risk of contracting leishmaniasis, which they called bejuco (liana and yateví. Qualitative data were collected by directly involving each community in discussion workshops and by interviewing knowledgeable informants. Using these materials as a foundation, the researchers prepared a survey with 10 closed-ended questions, which they administered to all persons over 14 years of age in each randomly chosen home visited. The results indicate that 94% of the population knew that leishmaniasis appeared as a skin disease; those not knowing that were more often women than men. With respect to the mode of transmission, 35% of the respondents connected the disease to the bite of an insect, but they did not what the etiologic agent was and thought that the bite was inflicted by a worm that lives in the mountains. In the communities studied, the residents used a great variety of treatments to cure the disease. The treatments were based on plants, chemical substances, burning the lesions with a piece of heated metal, and, to a lesser degree, drugs. Despite being responsible for taking care of sick persons in

  7. Diversity and primary productivity of hill beech forests from Doftana Valley (Romanian Subcarpathians

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    Mihaela Paucã-Comãnescu

    2009-12-01

    Full Text Available The hill beech forests cover most of the woody area in the Doftana Valley. The present study refers, for the first time, to two beech forests typical to this belt, which belong to the phytocoenological associations Epipactieto-Fagetum (Resmeriţă, 1972, in the Lunca Mare area, and Hieracio rotundati-Fagetum (Vida 1983, Täuber 1987 in the Sotrile area, from floristic, structural, biomass and necromass accumulation point of view, within the framework of the vertical structure of biocoenosis. The limestone substratum, occasionally with small outcrops in the first beech forest, differs chiefly through the pH levels (6.34-5.67 from the siliceous substratum (pH 5.11-4.36 in the second beech forest. The layer of trees is dominated by Fagus sylvatica in both forests; this species is associated with Cerasus avium (4.5%, Acer pseudoplatanus (2% and Sorbus torminalis (2% in the first beech forest, and is monodominant in the second. Although the forest underwent selective cuts, more intense in the Lunca Mare area, the aboveground ligneous biomass reaches nowadays 222 t/ha in the Lunca Mare area compared to only 163 t/ha in the Sotrile area; the average height is 28.8ą2.49 m and 23.7ą1.12 m, respectively, and the diameter is 33.30ą7.9 cm and 31.60ą6.28 cm, respectively. The species of macrofungi, not very numerous during the study because of scarce precipitations (6 and 7 species, respectively, are predominant on the rhytidoma trees in the beech forest rooted on the limestone ground; in the Sotrile beech forest they are joined by mycorrhizal and parasite species. The layer of shrub is underdeveloped. The herbaceous layer is discontinuous, and includes, along herbs, small plants and saplings belonging to the ligneous species and to liana Hedera helix. The maximal value of the aboveground biomass of the layer is 317 kg/ha DM in the Lunca Mare area and 235 kg /ha DM in the Sotrile area. Bryophyta is present in large quantities, especially in the Sotrile

  8. The 12th Edition of the Scientific Days of the National Institute for Infectious Diseases “Prof. Dr. Matei Bals” and the 12th National Infectious Diseases Conference

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    Cristian-Mihail Niculae

    2016-11-01

    Tălăpan A9 Streptococcus pneumoniae meningitis presenting with normal CSF – case presentation Ramona Ștefania Popescu, Luminița Bradu, Dragoș Florea, Adrian Streinu-Cercel A10 Extrapulmonary manifestations of infection with Mycoplasma pneumoniae – study on 24 cases Daniela Anicuta Leca, Elena Bunea, Andra Teodor, Egidia Miftode A11 The molecular diagnosis of severe bacterial sepsis in pediatric population Mădălina Merișescu, Gheorghiță Jugulete, Adrian Streinu-Cercel, Dragoș Florea, Monica Luminos A12 Acute Staphylococcus aureus endocarditis with multiple septic complications in a patient with diabetes mellitus – case presentation Ramona Ștefania Popescu, Anamaria Dobrotă, Adina Ilie, Liliana Lucia Preoțescu A13 Is Streptococcus suis meningitis an under-diagnosed zoonosis? Adriana Hristea, Raluca Jipa, Nicoleta Irimescu, Irina Panait, Eliza Manea, Simona Merisor, Cristian Niculae, Daniela Tălăpan A14 Klebsiella pneumoniae isolated from blood. Antimicrobial resistance – past and present Liana Cătălina Gavriliu, Otilia Elisabeta Benea, Șerban Benea, Alexandru Rafila, Olga Dorobăț, Mona Popoiu A15 Antibiotics resistance in Staphylococcus aureus isolated from blood cultures Livia Dragonu, Augustin Cupşa, Iulian Diaconescu, Irina Niculescu, Lucian Giubelan, Florentina Dumitrescu, Andreea Cristina Stoian, Camelia Guţă, Simona Puiu A16 Predominance of CTX-M enzymes in extended-spectrum β-lactamase-producing Enterobacteriaceae in two hospitals of Quebec City Bunescu Irina, Marilyse Vallée, Ann Huletsky, Dominique K. Boudreau, Ève Bérubé, Richard Giroux, Jean Longtin, Yves Longtin, Michel G. Bergeron A17 Postoperative meningoencephalitis with Acinetobacter baumannii XDR – a therapeutic challenge - Case report Cleo Nicoleta Roșculeț, Dalila-Ana Toma, Catrinel Ciuca, Daniela Tălăpan, Cătălin Apostolescu, Andrei Rogoz, Andrei Stangaciu, Viorica Mitescu, Tudor Vladoiu, Doina Iovănescu A18 Septic arthritis with Burkholderia cepacia