A5063211405- Ecology and Vegetation Dynamics Studies
- Plant and animal studies
- Species Distribution and Climate Change
- Historical and Environmental Studies
- Diverse academic and cultural studies
- Conservation, Biodiversity, and Resource Management
- Plant Diversity and Evolution
- Italian Social Issues and Migration
- Plant and Fungal Species Descriptions
- French Urban and Social Studies
- Amazonian Archaeology and Ethnohistory
- Italy: Economic History and Contemporary Issues
- Multiculturalism, Politics, Migration, Gender
- Plant Taxonomy and Phylogenetics
- Educational and Social Studies
- Evolution and Paleontology Studies
- Botany, Ecology, and Taxonomy Studies
- Wildlife Ecology and Conservation
- Bryophyte Studies and Records
- Public Policy and Governance
- Insurance, Mortality, Demography, Risk Management
- Management, Economics, and Public Policy
- Botany and Plant Ecology Studies
- Pleistocene-Era Hominins and Archaeology
- International Relations in Latin America
Missouri Botanical Garden
2013-2025
Higher University of San Andrés
2008-2025
Academia Nacional de Ciencias de Bolivia
2005-2023
Instituto Nacional de Biodiversidad
2016
Museo de Historia Natural Noel Kempff Mercado
2010
The vast extent of the Amazon Basin has historically restricted study its tree communities to local and regional scales. Here, we provide empirical data on commonness, rarity, richness lowland species across entire Guiana Shield (Amazonia), collected in 1170 plots all major forest types. Extrapolations suggest that Amazonia harbors roughly 16,000 species, which just 227 (1.4%) account for half trees. Most these are habitat specialists only dominant one or two regions basin. We discuss some...
The extent to which pre-Columbian societies altered Amazonian landscapes is hotly debated. We performed a basin-wide analysis of impacts on forests by overlaying known archaeological sites in Amazonia with the distributions and abundances 85 woody species domesticated peoples. Domesticated are five times more likely than nondomesticated be hyperdominant. Across basin, relative abundance richness increase around sites. In southwestern eastern Amazonia, distance strongly influences species....
Within the tropics, species richness of tree communities is strongly and positively associated with precipitation. Previous research has suggested that this macroecological pattern driven by negative effect water‐stress on physiological processes most species. This implies range limits taxa are defined their ability to occur under dry conditions, thus in terms distributions predicts a nested distribution from wet areas. However, ‘dry‐tolerance’ hypothesis yet be adequately tested at large...
Estimates of extinction risk for Amazonian plant and animal species are rare not often incorporated into land-use policy conservation planning. We overlay spatial distribution models with historical projected deforestation to show that at least 36% up 57% all tree likely qualify as globally threatened under International Union Conservation Nature (IUCN) Red List criteria. If confirmed, these results would increase the number on Earth by 22%. trends observed in Amazonia apply trees throughout...
Background: The Amazon to Andes transition zone provides large expanses of relatively pristine forest wilderness across environmental gradients. Such elevational gradients are an excellent natural laboratory for establishing long-term interactions between ecosystems and parameters, which is valuable understanding ecosystem responses change. Aims: This study presents data on trends structure (biomass, basal area, height, stem density), species richness, composition from six transects in the...
Unlike most rivers globally, nearly all lowland Amazonian have unregulated flow, supporting seasonally flooded floodplain forests. Floodplain forests harbor a unique tree species assemblage adapted to flooding and specialized fauna, including fruit-eating fish that migrate into floodplains, favoring expansive areas. Frugivorous are forest-dependent fauna critical forest regeneration via seed dispersal support commercial artisanal fisheries. We implemented linear mixed effects models...
Despite long-standing interest in elevational-diversity gradients, little is known about the processes that cause changes compositional variation of communities (β-diversity) across elevations. Recent studies have suggested β-diversity gradients are driven by species pools, rather than strength local community assembly mechanisms such as dispersal limitation, environmental filtering, or biotic interactions. However, tests this hypothesis been limited to very small spatial scales limit...
This study used high-precision radiocarbon bomb-pulse dating of selected wood rings to provide an independent validation the tree growth periodicity Pseudolmedia rigida (Klotzsch & H. Karst) Cuatrec. from Moraceae family, collected in Madidi National Park Bolivia. 14 C content was measured by accelerator mass spectrometry (AMS) 10 samples a single covering over 70 yr 1939 2011. These preliminary calendar dates were determined dendrochronological techniques and also select for AMS. In...
Abstract Aim Statistical and ecological mechanisms shape species abundance distributions (SADs). A lack of correlation between gradients SAD would suggest that SADs are caused by purely statistical reasons. We evaluated the variation in for communities landscapes differing variable connectivity, environmental heterogeneity, niches overlap productivity. Location Rainforests Madidi region (Bolivia). Methods compiled biological information on 65 sites (a site being a group two to six 0.1‐ha...
Various previous authors have questioned the cohesion and taxonomic association of a group Central Andean Passiflora species hereto commonly referred to as “The Lobbii group”. Following targeted studies, both literature in field, we here elevate this monophyletic independent rank section within subgenus Decaloba, supersection Multiflora. The alleged infraspecific variability highly disjunct distribution Bolivian typified exoperculata has also been evaluated. fieldwork Ecuador Bolivia,...
Abstract Seminal hypotheses in ecology and evolution postulate that stronger more specialized biotic interactions contribute to higher species diversity at lower elevations latitudes. Plant‐chemical defenses mediate between plants their natural enemies provide a highly dimensional trait space which chemically mediated niches may facilitate plant coexistence. However, the role of shaping communities remains largely untested across large‐scale ecological gradients. Here, we used metabolomics...
Two hereto elusive and misunderstood species of Passiflora sect. Simplicifoliae (Passifloraceae), guentheri P. mapiriensis, have been studied evaluated. This study has shown maintainable differences between the confirming their taxonomic separation, but questions are raised regarding origin information type localities. From manuscripts, both were described as being collected from exact same locality, which seem unlikely given close alliance. An expedition to Bolivia revisited this location,...
Amaryllidaceae alkaloids from the Amaryllidoideae subfamily exhibit broad pharmacological activities, including neuroprotection and anticancer effects. Galanthamine is a key compound for Alzheimer’s therapy. The Hippeastrum genus, particularly in Bolivia, offers significant potential novel drug discovery, emphasising need conservation further phytochemical research. Twenty-seven samples Bolivian species were investigated terms of their alkaloid profile anticholinesterase activity. analysis...
Abstract. Relative to research efforts in higher latitiudes, the impact of climate shifts tropical treeline remains understudied. Little is known about tree growth dynamics and response at this over past few centuries, present under a rapidly changing environment. Here we provide information on recent changes tree-ring patterns Polylepis pepei BB.Simpson, species that grows monospecific forest elevational Andes-Amazon ecotone Bolivia identify factors limit its radial growth. We first...
Understanding patterns and mechanisms of variation in the compositional structure communities across spatial scales is one fundamental challenges ecology biogeography. In this study, we evaluated effects extent (i.e. size study region) on: 1) whether community composition can be better explained by environmental niche‐based) or (e.g. dispersal‐based) processes ; 2) how climate soils contribute to influence environment on plant composition. We surveyed a network 398 forest plots spanning...
Abstract Aim Oligarchic patterns can vary from weak (i.e. little difference between rare and common species) to strong a set of dominant species is immediately evident). Our aim was understand the relationships strength oligarchic patterns, diversities (alpha, beta gamma), five potential causes (elevational variability, soil heterogeneity, elevation, conditions geographical extent). Location The Amazon–Andes transition in Madidi region (Bolivia). Methods We established 398 plots 0.1 ha each,...
Solanum morelliforme is an epiphytic wild potato ( section Petota ) species widely distributed throughout central Mexico to Honduras.A strikingly disjunct (approximately 4,000 km) population was recently discovered in Bolivia, representing the first record of this South America, and growing both North Central America America.Our maximum entropy analysis 19 climatic variables matches occurrence American locality with great precision.It demonstrates strong predictive quality procedure suggests...
Pragmatic methods to assess the status of biodiversity at multiple scales are required support conservation decision-making. At intersection several major biogeographic zones, Bolivia has extraordinary potential develop a monitoring strategy aligned with objectives Group on Earth Observations Biodiversity Observation Network (GEO BON). Bolivia, GEO Observer since 2005, is already working adequacy national earth observations towards Global System Systems (GEOSS). However, still an...
A Clusia L. incense tree, pachamamae Zenteno-Ruíz & A. Fuentes (Clusiaceae), is described and illustrated. This new species from the montane Yungas forests of northwestern Bolivia differs clearly other section Anandrogyne Planchon Triana in having spicate short-pedunculate inflorescences with six to 16 sessile decussate flowers. The various others which it morphologically close (and also have flowers) following ways: C. tarmensis Engler by 5- or rarely 6- (vs. always 6-)locular fruits leaves...
Summary Recent studies have demonstrated that ecological processes shape community structure and dynamics change along environmental gradients. However, much less is known about how the emergence of gradients themselves evolution species underlie assembly. In this study, we address creation novel environments leads to assembly via two nonmutually exclusive processes: immigration sorting pre‐adapted clades (ISPC), recent adaptive diversification (RAD). We study these in context elevational...
The Chusquea ramosissima informal group, including four named species, is classified within subg. based on morphological characters, but has not been rigorously studied in its entirety. putative synapomorphies distinguishing the C. group from remainder of are presence a pseudopetiolate culm leaf blade that remains green and synflorescences borne mix longer leafy shorter non-leafy subsidiary branches per node, features unknown rest subgenus or genus as whole. In addition, species share bud...
Patterns of species diversity have been associated with changes in climate across latitude and elevation. However, the ecological evolutionary mechanisms underlying these relationships are still actively debated. Here, we present a complementary view well-known tropical niche conservatism (TNC) hypothesis, termed multiple zones origin (MZO) to explore latitudinal elevational gradients phylogenetic tree communities. The TNC hypothesis posits that most lineages originate warmer, wetter, less...
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