Taxocenose de anfíbios anuros de serrapilheira em mata estacional semidecidual na Serra da Bodoquena, Mato Grosso do Sul

Abstract

The leaf litter layer is an important element for the maintenance of biodiversity, with the formation of moisture islands that are provided by this micro-habitat, making it a shelter for species that cannot tolerate high temperatures and low humidity as the example of anuro amphibious. Such factor assumes an influence on species composition at their spatial scales. The objectives of this study were: I) to describe the population (wealth, abundance and density) of frogs that inhabit the litter layer in seasonal forests around the National Park in Bodoquena mountain range, II) to investigate if the depth of the leaf litter layer influences the community parameters (wealth, abundance and density). Local richness was estimated based on the cumulative count of individuals of all species found in each plots using rarefaction curves. It was considered for each of the 35 sampled points, abundance data (number of individual), richness of species (number of species) and diversity through the Shannon-Wiener index. To verify the total diversity beta values, substitution of species and species nesting, we used the Sørensen dissimilarity Index and its coefficients. To investigate the link among the richness, abundance of species with litter depth, we used the Generalized Linear Mode (GLM) with negative binomial distribution. The rarefaction curve estimated approximately 24 species with a standard deviation of 2.04, we sampled 19 species distributed in 5 families. Rhinella scitula e Ameerega picta were the ones with the highest abundance and density. The number of species in the sample units varied from 1 to 10 and the abundance from 2 to 28. The general beta diversity presented the value of 0.91, with the species substitution of 0.89 and species nesting of 0.08. the species richness did not present any relation with the depth of litter, abundance showed a positive and significant relationship (z = 2.345, df= 0.0574, p= 0.019).