Katia Regina Casula
- Ecology and Vegetation Dynamics Studies
- Plant and animal studies
- Plant Diversity and Evolution
- Conservation, Biodiversity, and Resource Management
- Species Distribution and Climate Change
- Amazonian Archaeology and Ethnohistory
- Pleistocene-Era Hominins and Archaeology
- Indigenous Health and Education
- Wildlife Ecology and Conservation
- Environmental and Cultural Studies in Latin America and Beyond
- African Botany and Ecology Studies
- Fish biology, ecology, and behavior
- Fish Ecology and Management Studies
- Archaeology and ancient environmental studies
- Pacific and Southeast Asian Studies
- Genetic diversity and population structure
- Geological formations and processes
- Forest Ecology and Biodiversity Studies
- Plant Taxonomy and Phylogenetics
- Hydrology and Sediment Transport Processes
- Soil erosion and sediment transport
Universidade Federal de Rondônia
2015-2025
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...
Abstract Species distribution models (SDMs) are widely used in ecology and conservation. Presence-only SDMs such as MaxEnt frequently use natural history collections (NHCs) occurrence data, given their huge numbers accessibility. NHCs often spatially biased which may generate inaccuracies SDMs. Here, we test how the of predictions relates to a spatial abundance model, based on large plot dataset for Amazonian tree species, using inverse distance weighting (IDW). We also propose new pipeline...
Indigenous societies are known to have occupied the Amazon basin for more than 12,000 years, but scale of their influence on Amazonian forests remains uncertain. We report discovery, using LIDAR (light detection and ranging) information from across basin, 24 previously undetected pre-Columbian earthworks beneath forest canopy. Modeled distribution abundance large-scale archaeological sites Amazonia suggest that between 10,272 23,648 remain be discovered most will found in southwest. also...
Abstract Amazonia’s floodplain system is the largest and most biodiverse on Earth. Although forests are crucial to ecological integrity of floodplains, our understanding their species composition how this may differ from surrounding forest types still far too limited, particularly as changing inundation regimes begin reshape tree communities critical ecosystem functions they underpin. Here we address gap by taking a spatially explicit look at Amazonia-wide patterns tree-species turnover...
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...
Plants cope with the environment by displaying large phenotypic variation. Two spectra of global plant form and function have been identified: a size spectrum from small to tall species increasing stem tissue density, leaf size, seed mass; economics reflecting slow fast returns on investments in nutrients carbon. When assemble communities it is assumed that these are filtered produce community level functional composition. It unknown what main drivers for composition area such as Amazonia....
Abstract Tropical forests are known for their high diversity. Yet, forest patches do occur in the tropics where a single tree species is dominant. Such “monodominant” from all of main tropical regions. For Amazonia, we sampled occurrence monodominance massive, basin-wide database forest-inventory plots Amazon Tree Diversity Network (ATDN). Utilizing simple defining metric at least half trees ≥ 10 cm diameter belonging to one species, found only few occurrences and phenomenon was not...
Abstract Aim Amazonia hosts more tree species from numerous evolutionary lineages, both young and ancient, than any other biogeographic region. Previous studies have shown that lineages colonized multiple edaphic environments dispersed widely across Amazonia, leading to a hypothesis, which we test, should not be strongly associated with either geographic regions or forest types. Location Amazonia. Taxon Angiosperms (Magnoliids; Monocots; Eudicots). Methods Data for the abundance of 5082 in...
Using 2.046 botanically-inventoried tree plots across the largest tropical forest on Earth, we mapped species-diversity and species-richness at 0.1-degree resolution, investigated drivers for diversity richness. only location, stratified by type, as predictor, our spatial model, to best of knowledge, provides most accurate map in Amazonia date, explaining approximately 70% species-richness. Large soil-forest combinations determine a significant percentage variation alpha-diversity Amazonian...
Abstract Aim To investigate the geographic patterns and ecological correlates in distribution of most common tree dispersal modes Amazonia (endozoochory, synzoochory, anemochory hydrochory). We examined if proportional abundance these could be explained by availability agents (disperser‐availability hypothesis) and/or resources for constructing zoochorous fruits (resource‐availability hypothesis). Time period Tree‐inventory plots established between 1934 2019. Major taxa studied Trees with a...
Abstract In a time of rapid global change, the question what determines patterns in species abundance distribution remains priority for understanding complex dynamics ecosystems. The constrained maximization information entropy provides framework such systems by quantitative analysis important constraints via predictions using least biased probability distributions. We apply it to over two thousand hectares Amazonian tree inventories across seven forest types and thirteen functional traits,...
Abstract Leaf and wood functional traits of trees are related to growth, reproduction, survival, but the degree phylogenetic conservatism in these relationships is largely unknown. In this study, we describe variability strategies involving leaf, demographic characteristics for tree genera distributed across Amazon Region, quantify signal their relationships. aligned with variables along two main axes variation. The first axis represents coordination leaf describing resource uptake use,...
Abstract In a time of rapid global change, the question what determines patterns in species abundance distribution remains priority for understanding complex dynamics ecosystems. The constrained maximization information entropy provides framework such systems by quantitative analysis important constraints via predictions using least biased probability distributions. We apply it to over two thousand hectares Amazonian tree inventories across seven forest types and thirteen functional traits,...