Ocorrência de espécies de aves em trilhas de uma unidade de proteção integral

Abstract

The avifauna has been acting as a bioindicator of changes in ecosystems, helping to determine the integrity of forest fragments. This work aimed to investigate the presence and diversity of bird species in internal trails of the Paulo Pinto de Oliveira Municipal Ecological Station, located in Porto Barreiro, Paraná. Records were made fortnightly, for three months, at ten sampling points, using the fixed-point observation method, with photographic and sound recordings. Considering the method used and all areas studied, it was possible to register 89 species of birds, distributed in 33 families, with the insectivorous guild being the most frequent found in the sampling areas. Species distribution data showed high randomness, making it difficult to establish patterns of occurrence according to phytophysiognomy. Apparently, there is a series of combinations of factors related to specific points of the trails that favor the occurrence of certain species, so that in each location the faunal composition becomes distinct. Thus, what is important to explain the ability to provide and recruit species is not linked to the size of the fragment, but to the quality of resources it offers.