HiddingTremblayCote2012

Référence

Hidding, B., Tremblay, J.-P. and Cote, S.D. (2012) Survival and growth of balsam fir seedlings and saplings under multiple controlled ungulate densities. Forest Ecology and Management, 276:96-103. (Scopus )

Résumé

Tree species composition in forests can be strongly modulated by high densities of cervid herbivores ultimately leading to local extirpation of species. To establish which cervid densities are compatible with the recruitment of a browse sensitive tree species, seedlings and saplings should be surveyed under variable cervid densities rather than in their presence or absence alone. We studied the growth and survival of different demographic stages of balsam fir (Abies balsamea) on Anticosti island (Québec, Canada) under controlled densities of white-tailed deer (Odocoileus virginianus). In a seven-year experiment using deer enclosures, we followed the life stage and fate of individually tagged balsam fir seedlings/saplings under forest cover and forest logged at the start of the experiment. Almost no regeneration into the sapling stage (>30cm) was observed under ambient deer densities after 7years and decreased survival and growth were observed under an experimental deer density of 15km -2. However, mortality at ≤15deerkm -2 decreased over time and with age and stem height, converging towards mortality observed at 0deerkm -2. Given the relatively high stem density of saplings at 15deerkm -2 7years after the start of the treatment, our data indicate that at this density considerable balsam fir regeneration may occur, although the ultimate contribution of balsam fir to the canopy remains uncertain. The notion that small seedlings are most vulnerable to deer browsing and that balsam fir recruitment rapidly decreases after logging suggests that maintaining low deer densities is most crucial immediately after a stand-initiating disturbance (e.g. logging). © 2012 Elsevier B.V.

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@ARTICLE { HiddingTremblayCote2012,
    AUTHOR = { Hidding, B. and Tremblay, J.-P. and Cote, S.D. },
    TITLE = { Survival and growth of balsam fir seedlings and saplings under multiple controlled ungulate densities },
    JOURNAL = { Forest Ecology and Management },
    YEAR = { 2012 },
    VOLUME = { 276 },
    PAGES = { 96-103 },
    NOTE = { cited By 6 },
    ABSTRACT = { Tree species composition in forests can be strongly modulated by high densities of cervid herbivores ultimately leading to local extirpation of species. To establish which cervid densities are compatible with the recruitment of a browse sensitive tree species, seedlings and saplings should be surveyed under variable cervid densities rather than in their presence or absence alone. We studied the growth and survival of different demographic stages of balsam fir (Abies balsamea) on Anticosti island (Québec, Canada) under controlled densities of white-tailed deer (Odocoileus virginianus). In a seven-year experiment using deer enclosures, we followed the life stage and fate of individually tagged balsam fir seedlings/saplings under forest cover and forest logged at the start of the experiment. Almost no regeneration into the sapling stage (>30cm) was observed under ambient deer densities after 7years and decreased survival and growth were observed under an experimental deer density of 15km -2. However, mortality at ≤15deerkm -2 decreased over time and with age and stem height, converging towards mortality observed at 0deerkm -2. Given the relatively high stem density of saplings at 15deerkm -2 7years after the start of the treatment, our data indicate that at this density considerable balsam fir regeneration may occur, although the ultimate contribution of balsam fir to the canopy remains uncertain. The notion that small seedlings are most vulnerable to deer browsing and that balsam fir recruitment rapidly decreases after logging suggests that maintaining low deer densities is most crucial immediately after a stand-initiating disturbance (e.g. logging). © 2012 Elsevier B.V. },
    AUTHOR_KEYWORDS = { Balsam fir; Browsing; Herbivore resistance; Matrix models; Tree demography; White tailed deer },
    CODEN = { FECMD },
    DOCUMENT_TYPE = { Article },
    DOI = { 10.1016/j.foreco.2012.03.023 },
    ISSN = { 03781127 },
    KEYWORDS = { Balsam fir; Browsing; Matrix model; Tree demography; White-tailed deer, Experiments; Population dynamics; Population statistics; Reforestation, Ecology, browsing; coniferous tree; deer; demography; disturbance; forest cover; growth rate; herbivore; logging (timber); mortality; population density; regeneration; sapling; seedling; survival; ungulate, Anticosti Island; Canada; Quebec [Canada], Abies; Abies balsamea; Cervidae; Odocoileus virginianus; Ungulata },
    SOURCE = { Scopus },
    URL = { http://www.scopus.com/inward/record.url?eid=2-s2.0-84860146531&partnerID=40&md5=a22dd09dbbd31f6fb25c7f3ed5d42fc4 },
}

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