GreeneNoelBergeronEtAl2004

Référence

Greene, D.F., Noel, J., Bergeron, Y., Rousseau, M. and Gauthier, S. (2004) Recruitment of Picea mariana, Pinus banksiana, and Populus tremuloides across a burn severity gradient following wildfire in the southern boreal forest of Quebec. Canadian Journal of Forest Research, 34(9):1845-1857.

Résumé

Most studies of postfire tree recruitment have occurred in severely burned portions, despite the fact that partial burning is common. In this study we examined regeneration following a 1997 fire in the boreal forest of Quebec. A model of postfire recruitment was elaborated using parameters such as the proportion of trees killed (severity), the proportions of postfire seedbed types and their associated juvenile survivorship, the available seed supply, the available bud supply (for Populus tremuloides Michx.), and the granivory rate. All three species had peak recruitment in the first or second summer, and the recruitment episode was essentially finished after the third year. Mineral soil and surviving Sphagnum were the best seedbeds for both conifer species. Seedbed frequency was essentially independent of crown fire severity except for surviving Sphagnum, which was concentrated primarily where severity was light. Conifer fecundity was much lower in the lightly burned stands, a result we attribute to a higher granivory rate. The fecundity (seedlings/basal area for the conifers or suckers/basal area for Populus) in the severe sites was typical of the few other North American studies of postfire recruitment, where the published data permit us to make the comparison.

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@ARTICLE { GreeneNoelBergeronEtAl2004,
    AUTHOR = { Greene, D.F. and Noel, J. and Bergeron, Y. and Rousseau, M. and Gauthier, S. },
    TITLE = { Recruitment of Picea mariana, Pinus banksiana, and Populus tremuloides across a burn severity gradient following wildfire in the southern boreal forest of Quebec },
    JOURNAL = { Canadian Journal of Forest Research },
    YEAR = { 2004 },
    VOLUME = { 34 },
    PAGES = { 1845-1857 },
    NUMBER = { 9 },
    ABSTRACT = { Most studies of postfire tree recruitment have occurred in severely burned portions, despite the fact that partial burning is common. In this study we examined regeneration following a 1997 fire in the boreal forest of Quebec. A model of postfire recruitment was elaborated using parameters such as the proportion of trees killed (severity), the proportions of postfire seedbed types and their associated juvenile survivorship, the available seed supply, the available bud supply (for Populus tremuloides Michx.), and the granivory rate. All three species had peak recruitment in the first or second summer, and the recruitment episode was essentially finished after the third year. Mineral soil and surviving Sphagnum were the best seedbeds for both conifer species. Seedbed frequency was essentially independent of crown fire severity except for surviving Sphagnum, which was concentrated primarily where severity was light. Conifer fecundity was much lower in the lightly burned stands, a result we attribute to a higher granivory rate. The fecundity (seedlings/basal area for the conifers or suckers/basal area for Populus) in the severe sites was typical of the few other North American studies of postfire recruitment, where the published data permit us to make the comparison. },
    KEYWORDS = { Biodiversity Ecosystems Light Seed Soils Granivory rates Seedbeds Forestry boreal forest environmental gradient forest fire recruitment regeneration Biodiversity Forestry Light Seeds Soil Canada North America Quebec [Canada] Western Hemisphere World Catostomidae Coniferophyta Paragnetina Picea Picea mariana Pinus banksiana Populus Populus tremuloides Sphagnum },
    OWNER = { brugerolles },
    TIMESTAMP = { 2007.12.05 },
}

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