Análise comparativa dos nichos espacial e alimentar de anuros em áreas de Caatinga e Mata Atlântica de Sergipe, Brasil

• Autor(a) principal: Silva, Adilson de Oliveira
• Data de Publicação: 2014
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional da UFS
• Texto Completo: https://ri.ufs.br/handle/riufs/4404
• topic: Anfíbios; Meio ambiente; Dieta; Ecologia animal; Nicho (Ecologia); Anuro; Heterogeneidade ambiental; Microhabitat; Amphibia; Environmental heterogeneity; Diet; Microhabitat; CNPQ::CIENCIAS BIOLOGICAS::ECOLOGIA

Distinct environmental characteristics can directly affect community structure, they offer varying conditions and resources, which allows each area to establish different groups of species. In this study we analyzed two amphibian assemblages between October 2012 and September 2013 in two areas with different degrees of environmental heterogeneity, one in the Caatinga (Monument Natural Grota do Angico - MNGA ) and the other in the Atlantic Rainforest (Refugio de Vida Silvestre Mata do Junco - RVSMJ), both in the state of Sergipe. We used information about the spatial and food niches and their relationships with ecological and historical factors. We analyzed 1,332 records (999 - RVSMJ 333 - MNGA) of 28 species (22 - RVSMJ and 15 - MNGA, nine common to both areas). The food and space niche overlap was relatively high in both study sites. Nine types of microhabitats were used by the species being the most common, regardless of the area, soil (45.1 %), water (23.7 %) and leaflitter (8.6%). The most important preys in their diets were Formicidae and Coleoptera in both areas. Individuals in the Atlantic rainforest were relatively smaller than those of the Caatinga area suggesting differentiated investments between reproduction and growth between the areas. The results suggest that the assemblages from both areas are influenced by historical or phylogenetic factors only in the use of space assets. Their diets are strongly influenced by the availability of resources the environment offers.