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Composition of mixed-species bird flocks in forest fragments of southern Brazil Rev. Bras. Zool.
Brandt,Cláudia S.; Hasenack,Heinrich; Laps,Rudi R.; Hartz,Sandra Maria.
The present study aimed to evaluate the composition of mixed-species bird flocks in a fragmented landscape of the Atlantic Forest in southern Brazil. We recorded 117 species in 218 mixed-species flocks. The correspondence analysis showed two distinct groups of fragments according to degree of connectivity with other fragments. The percentage of original cover surrounding a sampled fragment area up to a ratio of 2.5 and 1 km was the variable that presented highest correlation with the formation of different composition of mixed-species bird flocks, followed by altitude. Based on these results, we concluded that, in landscapes with low levels of fragmentation, the composition of mixed flocks reflects the local species pool. Thus, future studies comparing...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Atlantic Forest; Bird community; Ecological interactions; Fragmentation; Mixed-species flocks.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702009000300013
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Composição da avifauna em duas matas ciliares na bacia do rio Jacaré-Pepira, São Paulo, Brasil Zoologia
Almeida,Maria Elisa de Castro; Vielliard,Jacques M.E; Dias,Manoel Martins.
A quali-quantitative survey was carried out in two riparian forests fragmente (approximately 40 ha each) at Jacaré-Pepira river. Our intention was to characterize its bird community conceming richness, abundance and species occurrence in these areas. The qualitative survey showed 130 species at Santa Elisa (Brotas, São Paulo) and 151 at Morro Chato (Dourado, São Paulo), whereas the quantitative survey revealed the presence of 69 and 75 species at Santa Elisa and Morro Chato, respectively. The small size and the isolation might be responsible for the low number of species found. Observing the abundance index values (IPA) we realize that there are a few number of species with a high IPA on the one hand, while on the other there is a large number of species...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bird community; Unlimited distance point counts; Riparian forest.
Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751999000400018
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Composição e dinâmica da avifauna da mata de Santa Genebra, Campinas, São Paulo, Brasil Zoologia
Aleixo,Alexandre; Vielliard,Jacques M.E..
A quali-quantitative survey of avifauna was earried out at the Santa Genebra forest reserve (MSG) in order to evaluate the current state of conservation of this important conservation area in the interior of São Paulo Stale. The qualilative survey recorded 134 species and the quantitativo survey through unlimited distance point counts recorded the abundance of 97 species. The low number of species recorded in both surveys was due to the small size (251 ha) and the high degree of isolation of the MSG. These factors plus the extensivo degradation of the forest cover prevent recolonization of extinct species and allow the expansion of some species tolerant to disturbance. The quantitative survey showed some species with an unusually high abundance index. The...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bird community; Unlimited distance point counts; Forest fragmentation; Density compensation.
Ano: 1995 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751995000300004
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