Searching for bioindicators of forest fragmentation: passerine birds in the Atlantic forest of southeastern Brazil/Busca por bioindicadores de fragmentacao florestal: aves Passeriformes na Floresta Atlantica do Sudeste do Brasil
Aiming to evaluate the potential of Passerine birds as bioindicators of forest fragmentation, we studied the avifauna in the mountain region of the state of Rio de Janeiro by mist-netting between 2001 and 2005. We sampled six sites, including four small fragments (from 4 to 64 ha) in an agricultural...
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| Published in: | Brazilian journal of biology Vol. 68; no. 2; pp. 259 - 268 |
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| Main Authors: | , , , , , , |
| Format: | Journal Article |
| Language: | English |
| Published: |
Association of the Brazilian Journal of Biology
01-05-2008
Instituto Internacional de Ecologia |
| Subjects: | |
| Online Access: | Get full text |
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| Summary: | Aiming to evaluate the potential of Passerine birds as bioindicators of forest fragmentation, we studied the avifauna in the mountain region of the state of Rio de Janeiro by mist-netting between 2001 and 2005. We sampled six sites, including four small fragments (from 4 to 64 ha) in an agricultural area (Teresopolis), one second-growth forest (440 ha Miguel Pereira) and a continuous forest (10,600 ha, Serra dos Orgaos National Park--SONP). Indicator Species analysis and a Monte Carlo test were run to detect associations between species and sites, considering at least 30% of perfect indication and a significant value for the statistical test, only considering species with at least 10 captures. A total of 30 Passerine birds were sampled, and due to their association to the largest area (SONP), we considered Sclerurus scansor, Mionectes rufiventris, Chiroxiphia caudata and Habia rubica as the best indicators for this area. Five species were more captured not by chance in the 440 ha second-growth: Conopophaga melanops, Myiobius barbatus, Myrmeciza loricata, Philydor atricapillus and Schiffornis virescens and no species were related to any small fragment. This analysis has identified specialized Passerine species in many aspects (foraging substract, needs for nesting, rarity status), and it can be a valuable tool for detecting possible bioindicators. Keywords: Atlantic forest, bioindicators, birds, Brazil, indicator species analysis. Para avaliar o potencial de Passeriformes como bioindicadores de fragmentacao florestal na Mata Atlantica, estudamos a avifauna da regiao serrana do Rio de Janeiro, utilizando capturas com redes de neblina entre 2001 e 2005. Foram amostradas seis areas, sendo quatro pequenos fragmentos (de 4 a 64 ha) em areas agricolas (Teresopolis), uma mata secundaria com cerca de 40 anos (440 ha--Miguel Pereira) e uma area de mata continua de 10600 hectares (Parque Nacional da Serra dos Orgaos--PARNASO). A analise de especies indicadoras e o teste de Monte Carlo foram empregados para que se verificassem as especies mais associadas a cada local amostrado, considerando-se um minimo de 30% de indicacao e valor significativo para o teste mencionado, utilizando-se somente especies com 10 ou mais capturas. Foi amostrado um total de 30 especies e, pela sua associacao com a maior area (PARNASO), consideramos Sclerurus scansor, Mionectes rufiventris, Chiroxiphia caudata e Habia rubica como as melhores indicadoras. Cinco especies foram mais capturadas nao ao acaso na area de 440 ha: Conopophaga melanops, Myiobius barbatus, Myrmeciza loricata, Philydor atricapillus e Schiffornis virescens. Nenhuma especie foi associada aos pequenos fragmentos. Como esta analise identificou especies de Passeriformes especialistas em diversos aspectos (substrato de forrageio, locais de nidificacao, status de raridade), ela pode ser uma ferramenta util na deteccao de possiveis bioindicadores. Palavras-chave: analise de especies indicadoras, aves, bioindicadores, Brasil, Mata Atlantica. |
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| ISSN: | 1519-6984 1678-4375 |
| DOI: | 10.1590/S1519-69842008000200006 |