CavardBergeronChenEtAl2011a

Référence

Cavard, X., Bergeron, Y., Chen, H.Y.H., Pare, D., Laganiere, J., Brassard, B. (2011) Competition and facilitation between tree species change with standdevelopment. Oikos, 120(11):1683-1695. (Scopus )

Résumé

Processes governing tree interspecific interactions, such as facilitationand competition, may vary in strength over time. This study triedto unveil them by performing dendrometrical analyses on black sprucePicea mariana, trembling aspen Populus tremuloides and jack pinePinus banksiana trees from pure and mixed mature boreal forest standsin the Clay Belt of northwestern Quebec and on the tills of northwesternOntario. We cored 1430 trees and cut 120 for stem analysis acrossall stand composition types, tree species and study regions. Aspenannual growth rate was initially higher when mixed with conifers,but then progressively decreased over time compared to pure aspenstands, while jack pine growth rate did not differ with black sprucepresence throughout all stages of stand development. When mixed withaspen, black spruce showed a contrary response to aspen, i.e. aninitial loss in growth but a positive gain later. On the richer claysoil of the Quebec Clay Belt region, however, both aspen and spruceresponses in mixed stands reversed between 37 and 54 years. Overall,our results demonstrate that interspecific interactions were presentand tended to change with stand development and among species. Ourresults also suggest that the nature of interspecific interactionsmay differ with soil nutrient availability. © 2011 The Authors.

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@ARTICLE { CavardBergeronChenEtAl2011a,
    AUTHOR = { Cavard, X. and Bergeron, Y. and Chen, H.Y.H. and Pare, D. and Laganiere,J. and Brassard, B. },
    TITLE = { Competition and facilitation between tree species change with standdevelopment },
    JOURNAL = { Oikos },
    YEAR = { 2011 },
    VOLUME = { 120 },
    PAGES = { 1683-1695 },
    NUMBER = { 11 },
    ABSTRACT = { Processes governing tree interspecific interactions, such as facilitationand competition, may vary in strength over time. This study triedto unveil them by performing dendrometrical analyses on black sprucePicea mariana, trembling aspen Populus tremuloides and jack pinePinus banksiana trees from pure and mixed mature boreal forest standsin the Clay Belt of northwestern Quebec and on the tills of northwesternOntario. We cored 1430 trees and cut 120 for stem analysis acrossall stand composition types, tree species and study regions. Aspenannual growth rate was initially higher when mixed with conifers,but then progressively decreased over time compared to pure aspenstands, while jack pine growth rate did not differ with black sprucepresence throughout all stages of stand development. When mixed withaspen, black spruce showed a contrary response to aspen, i.e. aninitial loss in growth but a positive gain later. On the richer claysoil of the Quebec Clay Belt region, however, both aspen and spruceresponses in mixed stands reversed between 37 and 54 years. Overall,our results demonstrate that interspecific interactions were presentand tended to change with stand development and among species. Ourresults also suggest that the nature of interspecific interactionsmay differ with soil nutrient availability. © 2011 The Authors. },
    COMMENT = { doi: 10.1111/j.1600-0706.2011.19294.x },
    ISSN = { 00301299 (ISSN) },
    OWNER = { Luc },
    TIMESTAMP = { 2011.11.15 },
    URL = { http://www.scopus.com/inward/record.url?eid=2-s2.0-80055071238&partnerID=40&md5=626bc4196df917fbccd5b498ec17827b },
}

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