Distinct bird communities in forests and fruit farms of Caatinga landscapes

Agricultural expansion and intensification drive changes in bird assemblages and contribute to the homogenization of communities. By working across the semi-arid biome of the Caatinga in northeastern Brazil, this study is the first to compare the bird communities found in intensively managed fruit farms with those in remnant Caatinga forest patches. We show that fruit farm patches host 56% lower bird abundance and 61% lower species richness compared with the remnant Caatinga forest fragments. Bird communities within the fruit farms were distinct from those within the forest patches, and they were characterized by species with broader niches, including two non-native species. A expansao e a intensificacao da agricultura modificam as comunidades de aves e contribuem para a sua homogeneizacao. Trabalhando no bioma Caatinga no semiarido do Nordeste do Brasil, este estudo e o primeiro a compararas comunidades de aves em fazendas de fruticultura com manejo intensivo com aquelas encontradas em manchas remanescentes com floresta de Caatinga. Nos mostramos que as manchas no interior das fazendas possuem menor abundancia (56%) e riqueza (61%) em comparacao com os fragmentos remanescentes da floresta de Caatinga. As comunidades de aves no interior das fazendas de fruticultura diferiram daquelas presentes nos fragmentos de floresta, e se caracterizaram por especies com nichos ecologicos mais amplos, incluindo duas especies exoticas.