Efeitos locais e regionais na estruturação de comunidades de anuros em paisagens de agropecuária

• Ano de defesa: 2014
• Autor(a) principal: Vieira, Raísa Romênia Silva
• Orientador(a): Bastos, Rogério Pereira
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Goiás
• Programa de Pós-Graduação: Programa de Pós-graduação em Ecologia e Evolução (ICB)
• Departamento: Instituto de Ciências Biológicas - ICB (RG)
• País: Brasil
• Palavras-chave em Português: Diversidade beta; Comunidades; Anfíbios anuros; Paisagem; Heterogeneidade ambiental
• Palavras-chave em Inglês: Beta diversity; Communities; Amphibians; Landscape; Environmental heterogeneity
• Área do conhecimento CNPq: CIENCIAS BIOLOGICAS::ECOLOGIA
• Link de acesso: http://repositorio.bc.ufg.br/tede/handle/tede/3464

Small water bodies (e.g. ponds, small lakes) are distributed in many landscapes and are commonly found in agricultural areas. These water bodies are important in maintaining regional biodiversity because they support heterogeneous communities of aquatic organisms. The differences in local and regional environmental features may explain beta diversity and which process, nestedness or turnover, is more important in these anthropogenic landscapes. In this work we aim to answer how local and regional factors affect the richness and variation in species composition of anurans in agricultural landscapes. We sampled amphibians in 68 water bodies in the surroundings of Goiânia municipality. Species turnover is the main phenomenon occurring in the landscape and this pattern differs from a null distribution. Environmental heterogeneity was the main variable affecting richness and beta diversity of frogs. The presence of species in the sampled area is mainly related to the availability of different microhabitats, both vertically and horizontally, which support particular requirements of the species. Is crucial to differentiate the nestedness and turnover phenomena to understand the processes that determine the organization of communities.