Rafaela Cândido de França

Composition of a snake assemblage inhabiting an urbanized area in the Atlantic Forest of Paraíba State, Northeast Brazil

The Atlantic Forest of Brazil is one of the most biologically diverse regions in the world, but also one of the most highly threatened, with only around six percent of its original cover remaining. Despite the increase in the number of studies on the ecology of Brazilian snakes during the last two decades, there are still very few works on snake assemblages in the Northeast region and almost nothing about snakes inhabiting urbanized areas in Atlantic Forest domain. Herein we describe the snake assemblage from the urban area of Rio Tinto city in Paraiba State, Northeast Brazil. We present data on composition, distribution and some natural history. Also, we compare the snake diversity of the urban area with the diversity in two nearby natural patches. We recorded 161 individuals of 25 species in 16 genera from the urban area of Rio Tinto and the most common species were Helicops angulatus, Bothrops leucurus, Epicrates assisi, and Philodryas patagoniensis. Most snake species were non-venomous, but some venomous snakes were abundant in the urban area and people must be cautious when dealing with these. Rarefaction curves did not reach stability and new species should be added to the Rio Tinto snake list in future studies.

Ecological diversity of a snake assemblage from the Atlantic Forest at the south coast of Paraíba, northeast Brazil

Abstract Despite an increase in studies focusing on snake ecology and composition in the northeastern Atlantic Forest, several poorly studied sites and environments remain. The aim of this study was to assess species richness and natural history attributes of the snakes of an assemblage in the Restinga, Tabuleiro and Forest environments of the Atlantic Forest of the south coast of Paraíba, northeastern Brazil. A total of 151 individuals of 27 species, 23 genera, and six families of snakes were found. The most effective sampling methods were time-constrained searches and incidental encounters. Species sampled most frequently were the blindsnake Epictiaborapeliotes, the Boa Constrictor Boaconstrictor, the Brown Vinesnake Oxybelisaeneus, and the Brazilian False Coral Snake Oxyrhopustrigeminus. The snake fauna is characterized mainly by terrestrial species found in open-area environments of Restinga and Tabuleiro, and with most species feeding on amphibians and small mammals. The rarefaction curve did not reach the asymptote and new species should be recorded for south coast of Paraíba in future studies. Despite the richness and composition of snakes of the south coast being similar to other areas in the state, there is a lack of some species typically linked to forests, and this is probably because of the high level of deforestation that the south area of the state has suffered.