CardinalMartinTremblayEtAl2012

Référence

Cardinal, E., Martin, J.-L., Tremblay, J.-P. and Cote, S.D. (2012) An experimental study of how variation in deer density affects vegetation and songbird assemblages of recently harvested boreal forests. Canadian Journal of Zoology, 90(6):704-713. (Scopus )

Résumé

Intense browsing by abundant large herbivores can threaten the ecological integrity of ecosystems by inducing modifications in the structure and composition of vegetation that trigger trophic cascades affecting plant and animal communities. We investigated the relationships between density of white-tailed deer (Odocoileus virginianus (Zimmermann, 1780)), forest succession after clear-cut, and songbird communities on Anticosti Island, Quebec, Canada. We hypothesized that lower deer densities would alter the trajectory of forest succession after clear-cutting and lead to a rapid recovery of habitat attributes favorable to songbirds associated with a dense complex shrub layer. Six years after establishing a controlled browsing experiment (0, 7.5, 15, and >27 deer·km-2) in recent clearcuts, reducing deer densities ≤7.5 deer·km-2)initiated the restoration of balsam fir (Abies balsamea (L.) Mill.) forests and increased the regeneration of paper birch (Betula papyrifera Marshall). Increasing birch ground cover from 10% to 20% increased songbird total abundance, species richness, and diversity by 17%, 39%, and 31%, respectively. Alder Flycatcher (Empidonax alnorum Brewster, 1895) was only present at ≤7.5 deer·km-2) and strongly associated with birch regeneration. The regeneration of browse-resistant plants such as white spruce (Picea glauca (Moench) Voss) in some areas at high deer density favored the maintenance of many shrub-dependent songbirds but also species usually associated with forest canopy. Active management of deer populations in Canadian harvested boreal forests will mitigate losses in vegetation and songbirds caused by over-browsing.

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@ARTICLE { CardinalMartinTremblayEtAl2012,
    AUTHOR = { Cardinal, E. and Martin, J.-L. and Tremblay, J.-P. and Cote, S.D. },
    TITLE = { An experimental study of how variation in deer density affects vegetation and songbird assemblages of recently harvested boreal forests },
    JOURNAL = { Canadian Journal of Zoology },
    YEAR = { 2012 },
    VOLUME = { 90 },
    PAGES = { 704-713 },
    NUMBER = { 6 },
    NOTE = { cited By 9 },
    ABSTRACT = { Intense browsing by abundant large herbivores can threaten the ecological integrity of ecosystems by inducing modifications in the structure and composition of vegetation that trigger trophic cascades affecting plant and animal communities. We investigated the relationships between density of white-tailed deer (Odocoileus virginianus (Zimmermann, 1780)), forest succession after clear-cut, and songbird communities on Anticosti Island, Quebec, Canada. We hypothesized that lower deer densities would alter the trajectory of forest succession after clear-cutting and lead to a rapid recovery of habitat attributes favorable to songbirds associated with a dense complex shrub layer. Six years after establishing a controlled browsing experiment (0, 7.5, 15, and >27 deer·km-2) in recent clearcuts, reducing deer densities ≤7.5 deer·km-2)initiated the restoration of balsam fir (Abies balsamea (L.) Mill.) forests and increased the regeneration of paper birch (Betula papyrifera Marshall). Increasing birch ground cover from 10% to 20% increased songbird total abundance, species richness, and diversity by 17%, 39%, and 31%, respectively. Alder Flycatcher (Empidonax alnorum Brewster, 1895) was only present at ≤7.5 deer·km-2) and strongly associated with birch regeneration. The regeneration of browse-resistant plants such as white spruce (Picea glauca (Moench) Voss) in some areas at high deer density favored the maintenance of many shrub-dependent songbirds but also species usually associated with forest canopy. Active management of deer populations in Canadian harvested boreal forests will mitigate losses in vegetation and songbirds caused by over-browsing. },
    AUTHOR_KEYWORDS = { Active management; Anticosti island; Controlled-browsing experiment; Odocoileus virginianus; Over-browsing; White-tailed deer },
    CODEN = { CJZOA },
    DOCUMENT_TYPE = { Article },
    DOI = { 10.1139/Z2012-037 },
    ISSN = { 00084301 },
    KEYWORDS = { boreal forest; browsing; clearcutting; community composition; coniferous forest; deciduous forest; deer; ecosystem management; experimental study; forest cover; ground cover; harvesting; herbivore; population density; restoration ecology; shrub; songbird; succession; trophic cascade, Anticosti Island; Canada; Quebec [Canada], Abies; Abies balsamea; Alnus; Animalia; Betula papyrifera; Cervidae; Empidonax alnorum; Odocoileus virginianus; Passeri; Picea glauca },
    SOURCE = { Scopus },
    URL = { http://www.scopus.com/inward/record.url?eid=2-s2.0-84870712885&partnerID=40&md5=f771a41d749476d1b90a4d10fcf649ac },
}

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