Bird trophic guilds in distinct phytophysiognomies associated with the Atlantic forest in the Ibura National Forest, Northeastern Brazil

Gremios de aves del bosque nacional de Ibura

Abstract

The fragmentation process of the Atlantic Forest can lead to the decline of many species, however, it can benefit generalist species better adapted to open environments. The present study investigated the influence of three phytophysiognomies (semi-deciduous seasonal Atlantic Forest, eucalypt plantations, and open fields) on the trophic guilds of birds in the Ibura National Forest (Sergipe, northeastern Brazil). Data were collected between August 2012 and May 2013 using MacKinnon lists, in biweekly three-day samples. A total of 91 species were recorded, being the most common omnivore, insectivore, and carnivore guilds. The Atlantic Forest area had a lower richness of bird species in the trophic guilds. Frugivores were not associated with the native forest, which may be related to local anthropogenic impacts associated with the exploitation of natural resources, resulting in higher species richness in the eucalyptus plantations and open fields. The results of the present study reinforce the potential of the Ibura National Forest for the conservation of the region’s avian fauna. However, it highlights the need to implement measures for managing the natural vegetation and concrete efforts for the conservation of birds.