BouchardBoudreault2016

Référence

Bouchard, M. and Boudreault, C. (2016) Is metapopulation size important for the conservation of understory plants and epiphytic lichens? Biological Conservation, 195:187-195. (Scopus )

Résumé

For a given species, reducing the extent, connectivity and health status of source populations will diminish the probability of colonizing suitable habitats. In this study, we evaluated if metapopulation size helped predict species presence in suitable habitats, by using boreal understory plants and epiphytic lichens as case studies. We sampled a network of 792 vegetation plots located across a 240,000-km2 section of pristine boreal forests. Landscape-level species abundance (LLSA), a proxy formetapopulation size,was quantified in a 50kmradius surrounding each plot. The effects of local environmental factors and LLSA on species presence were modelled with general linear models (GLMs). Forty-eight vascular plant species and 8 pendulous epiphytic lichens were abundant enough to be considered in the statistical analyses. Habitat variables explained the presence of 30 vascular plants and 4 lichen species to a relatively strong degree (Tjur's R2 N 0.15).Among these species, 16 vascular plants and 4 lichenswere significantly influenced by LLSA, independently of local habitat characteristics. Vascular plant species whose presencewas significantly affected by LLSA did not exhibit particular morphological traits or habitat preferences comparedwith those thatwere not affected. By contrast, the 4 epiphytic lichen species thatwere affected by LLSA were all associated with older forests. No species exhibited obvious metapopulation size thresholds below which the probability of species presence in suitable habitats dropped drastically. In terms of conservation, these results suggest that coarse-filter approaches are probably more robust and easy to implement than species-specific threshold approaches in this kind of ecosystem. © 2016 Elsevier Ltd.

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@ARTICLE { BouchardBoudreault2016,
    AUTHOR = { Bouchard, M. and Boudreault, C. },
    TITLE = { Is metapopulation size important for the conservation of understory plants and epiphytic lichens? },
    JOURNAL = { Biological Conservation },
    YEAR = { 2016 },
    VOLUME = { 195 },
    PAGES = { 187-195 },
    NOTE = { cited By 0 },
    ABSTRACT = { For a given species, reducing the extent, connectivity and health status of source populations will diminish the probability of colonizing suitable habitats. In this study, we evaluated if metapopulation size helped predict species presence in suitable habitats, by using boreal understory plants and epiphytic lichens as case studies. We sampled a network of 792 vegetation plots located across a 240,000-km2 section of pristine boreal forests. Landscape-level species abundance (LLSA), a proxy formetapopulation size,was quantified in a 50kmradius surrounding each plot. The effects of local environmental factors and LLSA on species presence were modelled with general linear models (GLMs). Forty-eight vascular plant species and 8 pendulous epiphytic lichens were abundant enough to be considered in the statistical analyses. Habitat variables explained the presence of 30 vascular plants and 4 lichen species to a relatively strong degree (Tjur's R2 N 0.15).Among these species, 16 vascular plants and 4 lichenswere significantly influenced by LLSA, independently of local habitat characteristics. Vascular plant species whose presencewas significantly affected by LLSA did not exhibit particular morphological traits or habitat preferences comparedwith those thatwere not affected. By contrast, the 4 epiphytic lichen species thatwere affected by LLSA were all associated with older forests. No species exhibited obvious metapopulation size thresholds below which the probability of species presence in suitable habitats dropped drastically. In terms of conservation, these results suggest that coarse-filter approaches are probably more robust and easy to implement than species-specific threshold approaches in this kind of ecosystem. © 2016 Elsevier Ltd. },
    AUTHOR_KEYWORDS = { Boreal forest; Epiphytic lichens; Habitat abundance; Habitat threshold; Landscape-level conservation approach; Understory plants },
    DOCUMENT_TYPE = { Article },
    DOI = { 10.1016/j.biocon.2015.12.029 },
    SOURCE = { Scopus },
    URL = { http://www.scopus.com/inward/record.url?eid=2-s2.0-84955241691&partnerID=40&md5=f1392a6ac4c112f904d81f3faae943c1 },
}

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