Richness, composition and trophic groups of an avian community in the Pernambuco Endemism Centre, Alagoas, Brazil

Anais da Academia Brasileira de Ciências

Guilherme S. Toledo-lima¹  Phoeve Macario¹  Rachel M. De Lyra-neves¹  Bruno P. Teixeira¹  Luiz A.f. De Lima¹  Gabriel O.s. Sugliano¹  Wallace R. Telino-jÚnior¹ 

关键词: Atlantic Forest;    birds;    Northeastern Brazil;    trophic groups;    Floresta Atlântica;    aves;    Nordeste do Brasil;    grupos tróficos;   

DOI  :  10.1590/0001-3765201420130129

来源: SciELO

【 摘 要 】

In northeastern Brazil, the reduction of the natural forest cover to a series of small, isolated fragments has had negative consequences for the local avian fauna, in particular, a loss of the more specialized species, while the populations of some generalists have tended to increase. The present study focuses on the composition and trophic groups of a bird community on a farm in the northeastern Brazilian state of Alagoas. Monthly surveys were conducted between November 2008 and October 2009, based on mist-netting and systematic observations. Overall, 112 species were recorded, of which 76 were associated with the two forest fragments surveyed, while all the others were observed exclusively in the surrounding matrix of pasture and orchards. The bird community presented a predominance of insectivorous species, followed by omnivores. However, specialized trunk-creeping and understory insectivores accounted for only around 15% of the species in this feeding category. The reduced diversity of other guilds and species with more specialized diets, and the complete absence of sensitive species such as large parrots and raptors, reflects the severe fragmentation and degradation of the local forests, which has greatly reduced the availability of dietary resources and breeding sites.

【 授权许可】

CC BY   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License