Efeitos locais e regionais na estruturação de comunidades de anuros em paisagens de agropecuária
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2014-05-29
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Universidade Federal de Goiás
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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.
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VIEIRA, Raísa Romênia Silva. Efeitos locais e regionais na estruturação de comunidades de anuros em paisagens de agropecuária. 2014. 38 f. Dissertação (Mestrado em Ecologia e Evolução) - Universidade Federal de Goiás, Goiânia, 2014.