Structure and spatial organization of two anuran communities of the Pampa biome

The Pampa is the smallest Brazilian biome and is one of the most endangered, due to the expansion of the agropastoril cultures and the silviculture; is one of the Brazilian biomes with the lowest representation on the conservation unities system. In this study are presented information about the structure and spatial organization of anuran communities of two physiographic regions, from the four in which the biome is divided. Were sampled ten waterbodies in each region between the months of September 2011 and August 2012. Were registered 24 species characterized as generalist, with wide distribution and typical of the open areas. The species accumulation curve showed an assintota after the 12 degrees month of sampling. The similarity analysis showed a segregation in the structure of both communities that were influenced by the environmental landscape descriptors.