Borges-Matos2016417

Référence

Borges-Matos, C., Aragon, S., da Silva, M.N.F., Fortin, M.-J. and Magnusson, W.E. (2016) Importance of the matrix in determining small-mammal assemblages in an Amazonian forest-savanna mosaic. Biological Conservation, 204:417-425. (Scopus )

Résumé

Patch-size and connectivity effects on organisms are usually strong, but may be positive or negative, depending on the landscape context. A binary habitat/non-habitat perspective that fails to consider matrix heterogeneity often explains these inconsistent results, as matrix influences patch quality and connectivity differently for different species. Here we tested the effects of patch size, connectivity and matrix type on non-volant small-mammal assemblages in an eastern-Brazilian Amazonian forest-savanna mosaic. We sampled 14 forest-patches and 2 continuous-forest plots, using 60 baited live traps and 8 pitfall traps (60 L) per plot in 3 field expeditions. We estimated connectivity using the Proximity Index and matrix type as the proportions of savanna or regrowth forest around patches. We used one-dimensional NMDS, ANCOVA and multiple regression to test the relationships among species composition, species traits and predictor variables. We captured 178 individuals of 16 small-mammal species and an NMDS ordination showed a pattern of assemblage change that was strongly related to matrix type. Connectivity and patch size had no statistically significant effect on assemblage composition. Species associated with patches in regrowth-forest matrix were mostly rodents, relatively large and mainly frugivorous, while species associated with savanna-matrix patches were smaller, mostly insectivorous, marsupials. This may be related to how matrix is used by small mammals and affects patch quality, rather than how it limits animal movements. Composition of small-mammal assemblages in patches depended on the type of surrounding matrix, so matrix heterogeneity enhances small-mammal assemblage diversity in this landscape and should be taken into consideration in regional conservation-unit management plans. © 2016 Elsevier Ltd

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@ARTICLE { Borges-Matos2016417,
    AUTHOR = { Borges-Matos, C. and Aragon, S. and da Silva, M.N.F. and Fortin, M.-J. and Magnusson, W.E. },
    TITLE = { Importance of the matrix in determining small-mammal assemblages in an Amazonian forest-savanna mosaic },
    JOURNAL = { Biological Conservation },
    YEAR = { 2016 },
    VOLUME = { 204 },
    PAGES = { 417-425 },
    NOTE = { cited By 1 },
    ABSTRACT = { Patch-size and connectivity effects on organisms are usually strong, but may be positive or negative, depending on the landscape context. A binary habitat/non-habitat perspective that fails to consider matrix heterogeneity often explains these inconsistent results, as matrix influences patch quality and connectivity differently for different species. Here we tested the effects of patch size, connectivity and matrix type on non-volant small-mammal assemblages in an eastern-Brazilian Amazonian forest-savanna mosaic. We sampled 14 forest-patches and 2 continuous-forest plots, using 60 baited live traps and 8 pitfall traps (60 L) per plot in 3 field expeditions. We estimated connectivity using the Proximity Index and matrix type as the proportions of savanna or regrowth forest around patches. We used one-dimensional NMDS, ANCOVA and multiple regression to test the relationships among species composition, species traits and predictor variables. We captured 178 individuals of 16 small-mammal species and an NMDS ordination showed a pattern of assemblage change that was strongly related to matrix type. Connectivity and patch size had no statistically significant effect on assemblage composition. Species associated with patches in regrowth-forest matrix were mostly rodents, relatively large and mainly frugivorous, while species associated with savanna-matrix patches were smaller, mostly insectivorous, marsupials. This may be related to how matrix is used by small mammals and affects patch quality, rather than how it limits animal movements. Composition of small-mammal assemblages in patches depended on the type of surrounding matrix, so matrix heterogeneity enhances small-mammal assemblage diversity in this landscape and should be taken into consideration in regional conservation-unit management plans. © 2016 Elsevier Ltd },
    AFFILIATION = { Programa de Pos-Graduação em Ecologia, Instituto Nacional de Pesquisas da Amazonia, Av. André Araújo 2936, Manaus, Amazonas, Brazil; Postdoctoral Research Fellow PNPD-CAPES, Programa de Pos-Graduação em Recursos Naturais da Amazonia (PPGRNA), Universidade Federal do Oeste do Para (UFOPA), Av. Mendonça Furtado 2440, Santarém, Para, Brazil; Coordenação de Pesquisas em Biodiversidade e Coleções Zoologicas, Instituto Nacional de Pesquisas da Amazonia, Av. André Araújo, 2936, Manaus, Amazonas, Brazil; Department of Ecology and Evolutionary Biology, University of Toronto, M5S3G5, Toronto, Ontario, Canada; Coordenação de Pesquisas em Ecologia, Instituto Nacional de Pesquisas da Amazonia, Av. André Araújo 2936, Manaus, Amazonas, Brazil },
    AUTHOR_KEYWORDS = { Connectivity; Conservation; Eastern Amazon; Landscape ecology; Patch size },
    DOCUMENT_TYPE = { Article },
    DOI = { 10.1016/j.biocon.2016.10.037 },
    SOURCE = { Scopus },
    URL = { https://www.scopus.com/inward/record.uri?eid=2-s2.0-85006256292&doi=10.1016%2fj.biocon.2016.10.037&partnerID=40&md5=229fd2d0653bd89f275947e7a24bfc2c },
}

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