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dc.contributor.authorMartensen, Alexandre Camargo
dc.contributor.authorRibeiro, Milton Cezar [UNESP]
dc.contributor.authorBanks-Leite, Cristina
dc.contributor.authorPrado, Paulo Inacio
dc.contributor.authorMetzger, Jean Paul
dc.identifier.citationConservation Biology. Hoboken: Wiley-blackwell, v. 26, n. 6, p. 1100-1111, 2012.
dc.description.abstractTheoretical and empirical studies demonstrate that the total amount of forest and the size and connectivity of fragments have nonlinear effects on species survival. We tested how habitat amount and configuration affect understory bird species richness and abundance. We used mist nets (almost 34,000 net hours) to sample birds in 53 Atlantic Forest fragments in southeastern Brazil. Fragments were distributed among 3 10,800-ha landscapes. The remaining forest in these landscapes was below (10% forest cover), similar to (30%), and above (50%) the theoretical fragmentation threshold (approximately 30%) below which the effects of fragmentation should be intensified. Species-richness estimates were significantly higher (F = 3715, p = 0.00) where 50% of the forest remained, which suggests a species occurrence threshold of 30-50% forest, which is higher than usually occurs (<30%). Relations between forest cover and species richness differed depending on species sensitivity to forest conversion and fragmentation. For less sensitive species, species richness decreased as forest cover increased, whereas for highly sensitive species the opposite occurred. For sensitive species, species richness and the amount of forest cover were positively related, particularly when forest cover was 30-50%. Fragment size and connectivity were related to species richness and abundance in all landscapes, not just below the 30% threshold. Where 10% of the forest remained, fragment size was more related to species richness and abundance than connectivity. However, the relation between connectivity and species richness and abundance was stronger where 30% of the landscape was forested. Where 50% of the landscape was forested, fragment size and connectivity were both related to species richness and abundance. Our results demonstrated a rapid loss of species at relatively high levels of forest cover (30-50%). Highly sensitive species were 3-4 times more common above the 30-50% threshold than below it; however, our results do not support a unique fragmentation threshold.en
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.relation.ispartofConservation Biology
dc.sourceWeb of Science
dc.subjectAtlantic Foresten
dc.subjectfragment sizeen
dc.subjecttropical landscapesen
dc.titleAssociations of Forest Cover, Fragment Area, and Connectivity with Neotropical Understory Bird Species Richness and Abundanceen
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionTaki Ambiental
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniv London Imperial Coll Sci Technol & Med
dc.description.affiliationUniv São Paulo, Inst Biociencias, Dept Ecol, BR-05508900 São Paulo, Brazil
dc.description.affiliationTaki Ambiental, BR-18315000 Ribeirao Grande, SP, Brazil
dc.description.affiliationUniv Estadual Paulista, Inst Biociencias, Dept Ecol, BR-13506900 Rio Claro, SP, Brazil
dc.description.affiliationUniv London Imperial Coll Sci Technol & Med, Div Ecol & Evolut, Ascot SL5 7PY, Berks, England
dc.description.affiliationUnespUniv Estadual Paulista, Inst Biociencias, Dept Ecol, BR-13506900 Rio Claro, SP, Brazil
dc.rights.accessRightsAcesso restrito
dc.description.sponsorshipIdCNPq: 69014416
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Biociências, Rio Claropt
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