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Land use explains the distribution of threatened new world amphibians better than climate

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Land use explains the distribution of threatened new world amphibians better than climate

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Título Land use explains the distribution of threatened new world amphibians better than climate
Autor Brum, Fernanda Thiesen
Gonçalves, Larissa Oliveira
Cappelatti, Laura
Carlucci, Marcos Bergmann
Debastiani, Vanderlei Julio
Salengue, Elisa Viana
Seger, Guilherme Dubal dos Santos
Both, Camila Chiamenti
Silva, Jorge Sebastião Bernardo
Loyola, Rafael Dias
Duarte, Leandro da Silva
Abstract Background: We evaluated the direct and indirect influence of climate, land use, phylogenetic structure, species richness and endemism on the distribution of New World threatened amphibians. Methodology/Principal Findings: We used the WWF’s New World ecoregions, the WWFs amphibian distributional data and the IUCN Red List Categories to obtain the number of threatened species per ecoregion. We analyzed three different scenarios urgent, moderate, and the most inclusive scenario. Using path analysis we evaluated the direct and indirect effects of climate, type of land use, phylogenetic structure, richness and endemism on the number of threatened amphibians in New World ecoregions. In all scenarios we found strong support for direct influences of endemism, the cover of villages and species richness on the number of threatened species in each ecoregion. The proportion of wild area had indirect effects in the moderate and the most inclusive scenario. Phylogenetic composition was important in determining the species richness and endemism in each ecoregion. Climate variables had complex and indirect effects on the number of threatened species. Conclusion/Significance: Land use has a more direct influence than climate in determining the distribution of New World threatened amphibians. Independently of the scenario analyzed, the main variables influencing the distribution of threatened amphibians were consistent, with endemism having the largest magnitude path coefficient. The importance of phylogenetic composition could indicate that some clades may be more threatened than others, and their presence increases the number of threatened species. Our results highlight the importance of man-made land transformation, which is a local variable, as a critical factor underlying the distribution of threatened amphibians at a biogeographic scale.
Contido em PLoS ONE. San Francisco. Vol. 8, no. 4 (Apr. 2013), e60742, p. 1-7
Assunto Anfíbios
Dinâmica populacional
Mudanças climáticas
Origem Estrangeiro
Tipo Artigo de periódico
URI http://hdl.handle.net/10183/115300
Arquivos Descrição Formato
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