Does human influence on coastal grasslands habitats affect predation pressure on snakes?

作者：dos Santos Mauricio Beux^*; Lamim Martins de Oliveira Mauro Cesar; Goncalves Tatiane Penteado; Almeida Francis de Mattos; Loebmann Daniel; Tozetti Alexandro Marques

来源：Biota Neotropica, 2013, 13(1): 366-370.

• reptiles
• coastal dunes
• human impact
• predation
• Brazil

The loss and modification of habitats by humans have been considered key factors in the decline of diversity of species worldwide. However, the real effect caused by these disturbances on the biota is still poorly understood. The assessment of the changes in the network of interspecific interactions, such as predation rates on the native fauna, can be an important tool to diagnose the functionality of disturbed ecosystems. In this study we evaluate the predation rate on snakes in coastal grasslands in South America under human influence. Predation rate of artificial snakes, unlike that obtained in other studies, was lower in human-altered areas than preserved ones. Our findings may be due to a reduction in the abundance and/or richness of species of native predators in more disturbed areas.

• 出版日期2013-3