A comunidade de anuros do folhiço da Serra das Torres, sul do Espírito Santo, no sudeste do Brasil: A sazonalidade afeta os parâmetros da comunidade?

Abstract

We studied the leaf-litter frog community of the forests of Serra das Torres, southern Espírito Santo, southeastern Brazil. We used methods 4 x 4 m plots for the first data on seasonality in the composition, mass and density in the state of Espirito Santo. We field sampling during the dry and rainy season, from June 2009 to December 2010. We recorded 348 individuals with an average of 1.0 ± 0.1 ind / plot, and 14 species associated with leaf litter on the forest floor. Rarefaction curves and the collector had asymptotes tended to stabilize. The density of frogs in the study area was 6.59 ind/100 m² and total biomass 413.9 g. Brachycephalus didactylus was the species with the highest density (3.8 ind/100 m²) and greater abundance (100 individuals or 40.6% of the general community), however, had relatively low biomass (16.8 g) when compared to other species as Haddadus binotatus (239.6 g or 57.2% of the total biomass of the community). We register no seasonal variation in relation to the density or biomass in the community. The relative humidity and leaf litter depth environmental factors were significant for abundance, while the temperature and the presence of rocks or trees within the plots were not important in structuring the community in that area. This study adds to the geographic distribution of Brachycephalus didactylus, Zachaenus parvulus, Physalaemus crombiei, Ischnocnema cf. bolbodactyla, Ischnocnema gr. lactea and Leptodactylus cf. bokermanni.