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*The rich ecology of tropical forests is intimately tied to their moisture status. Multi-site syntheses can provide a macro-scale view of these linkages and their susceptibility to changing climates. Here, we report pan-tropical and regional-scale analyses of tree vulnerability to drought. *We assembled available data on tropical forest tree stem mortality(More)
The Amazon rain forest sustains the world's highest tree diversity, but it remains unclear why some clades of trees are hyperdiverse, whereas others are not. Using dated phylogenies, estimates of current species richness and trait and demographic data from a large network of forest plots, we show that fast demographic traits--short turnover times--are(More)
Understanding the processes that determine above-ground biomass (AGB) in Amazonian forests is important for predicting the sensitivity of these ecosystems to environmental change and for designing and evaluating dynamic global vegetation models (DGVMs). AGB is determined by inputs from woody productivity [woody net primary productivity (NPP)] and the rate(More)
In the Venezuelan Andes, some small-scale forest plantations have become an important resource basis for forest management. In this paper, the forestry management progress in the Mucujún river watershed is analyzed. Constraints and opportunities for sustainable management within national policies, local regulations, environmental features and social(More)
In southern Aragua state, Venezuela—an area regarded as high priority for local and national development—important sources of income and traditions are related to a history of manufacturing wood products including furniture and woodcraft made of the native tree species Samanea saman. However, scarcity of wood has recently become a major constraint for(More)
Lineages tend to retain ecological characteristics of their ancestors through time. However, for some traits, selection during evolutionary history may have also played a role in determining trait values. To address the relative importance of these processes requires large-scale quantification of traits and evolutionary relationships among species. The(More)
Pulsed laser deposition was employed to grow thin films of the Heusler compounds Co 2 MnSi and Co 2 FeSi. Epitaxial growth was realized both directly on MgO (100) and on a Cr or Fe buffer layer. Structural analysis by x-ray and electron diffraction shows for both materials the ordered L2 1 structure. Bulk magnetization was determined with a SQUID(More)
In the last 20 years, the Mocotíes watershed in the Venezuelan Andes has experienced an intense process of land-use change, with natural forests being replaced by “sun grown coffee” (Coffea arabica) monocultures in sites of high slope, increasing risk conditions and the vulnerability of people living in lower parts of the watershed. Using a local-scale(More)
In the context of multiple forest management, multipurpose tree species which provide both timber and non-timber forest products (NTFP), present particular challenges as the potential of conflicting use for either product may be high. One key aspect is that the magnitude of conflict of use can be location specific, thus adding complexity to policy(More)