Dados quantitativos da estrutura da comunidade de anfíbios e répteis em um trecho da BR-242 em uma área de transição Amazônia-Cerrado

Abstract

The continental dimension of Brazil and the diversity of environments make possible a scenario of up to 13% of the world's biota. The Nova Ubiratã region crosses two biomes: Cerrado and Amazon, with transition areas containing both. Among the threats, the highways are linear enterprises that have large extensions, and represent a strong threat to wildlife. Therefore, we bring here information about the richness, abundance and composition of areas sampled around sections of the BR-242 highway. During the eight monitoring campaigns, 496 individuals of the terrestrial herpetofauna were recorded in the two sampling modules, belonging to 48 species, including 21 amphibians and 27 reptiles. The similarity analysis of species composition shows the formation of two groups - one related to Module 1 and the other to Module 2, and the low similarity between the plots of the two modules. Considering the eight field campaigns, higher numbers of individuals and species were recorded in Module 2 in relation to Module 1. Richness and abundance were, in general, higher in the plots located in Module 2 (ranging from 7 to 15 species and 17 to 53 individuals) compared to the plots in Module 1 (ranging from 4 to 12 species and from 8 to 34 individuals). In herpetofauna composition, as a parcel within the same protective equipment conditioned to the consideration of the most similar to each other. The highest values of richness and non-module 2 can, in general, be explained by the greater proximity to the Ronuro River, and the lowest in module 1 due to the greater distance from the Von Dern Steinen River. The considerable values of richness and abundance found in plot 2 of module 1, even being the closest to the highway, can still be elucidated by the shorter distance from the Von Der Steinen river. Greater similarity between the species composition of the species of the same module can be configured in each module, if the same forest fragment is found.