Avian assemblages in bamboo and non-bamboo habitats in a tropical rainforest
Débora Cristina Rother A , Kaizer José Ferreira Alves B and Marco Aurélio Pizo C D
+ Author Affiliations
- Author Affiliations
A UNESP – Universidade Estadual Paulista, Departamento de Botânica, 13506-900 Rio Claro, São Paulo, Brazil.
B Instituto Adolfo Lutz – Regional de Rio Claro, 13500-090 Rio Claro, São Paulo, Brazil.
C UNESP – Universidade Estadual Paulista, Departamento de Zoologia, 13506-900 Rio Claro, São Paulo, Brazil.
D Corresponding author. Email: pizo@rc.unesp.br
Emu 113(1) 52-61 https://doi.org/10.1071/MU12017
Submitted: 28 February 2012 Accepted: 26 September 2012 Published: 3 January 2013
Abstract
Some species of bird are closely associated with bamboos (bamboo specialists) but community-wide studies comparing the avian assemblages in bamboo and non-bamboo habitats are lacking. Using point counts, we compared the species richness, abundance and composition of the avian assemblages in bamboo and non-bamboo habitats in the Brazilian Atlantic forest. Apart from considering bamboo specialists and non-specialist species, we contrasted birds from different categories of forest dependence, forest strata and diet. We recorded a total of 81 species of birds (74 in bamboo, 55 in non-bamboo habitats), including 15 bamboo specialists. Species richness was greater in bamboo habitats in all categories of diet and forest dependence. Bamboo and non-bamboo habitats had a similar number of canopy species, but bamboo habitats had a greater number of non-canopy species. The abundance of the whole avian community or of each of the dietary categories did not differ between habitats. The overall species composition differed between habitats, with a more homogeneous composition in non-bamboo habitats. A great number of species use bamboo habitats, even if they are not bamboo specialists. The initial expansion of bamboos, forming discrete patches of bamboo within mature forest, represents an intermediate-level disturbance that enhances forest heterogeneity and promotes the diversity of avian communities.
Additional keywords: Atlantic forest, Brazil, diet, forest dependence, forest strata, intermediate-disturbance hypotheses.
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