Crete1997407

Référence

Crete, M., Huot, J., Fortin, M.-J. and Jean Doucet, G. (1997) Comparison of plant and animal diversity on new reservoir islands and established lake islands in the northern boreal forest of Quebec. Canadian Field-Naturalist, 111(3):407-416. (Scopus )

Résumé

We determined species diversity of passerines, small mammals, and woody plants on new islands of the La Grande-3 hydroelectric reservoir, in the northern boreal forest of Quebec, and compared it with that on natural islands of two large neighbouring lakes. We predicted that species diversity on reservoir islands would be greater than that on lake islands because relaxation (progressive loss of species caused by an excess of extinction over immigration) had not fully operated on reservoir islands due to their relatively recent creation, only 11 years before the study. Animal diversity, richness and species composition were similar in both island groups. Exceptions were a greater abundance of Northern Waterthrush (Seiurus noveboracencis) and Meadow Vole (Microtus pennsylvanicus) on lake islands. However, richness of woody plants on reservoir islands exceeded that on lake islands. We did not find four shrub species in our samples on lake islands which were recorded on reservoir islands. The mean age of trees on lake islands (192 y) significantly exceeded that of trees on reservoir islands (112 yr). In contrast to the mainland, where young stands regenerating following fire abounded, mature forest stands strongly dominated on lake islands. We speculated that fire cycles might be longer on natural islands than on the mainland, and that reservoir islands could become similar to lake islands with time. Difference in plant diversity between island groups may have resulted from differences in fire cycle rather than from time since isolation alone. We discuss the future of reservoir islands with respect to plant and animal diversity.

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@ARTICLE { Crete1997407,
    AUTHOR = { Crete, M. and Huot, J. and Fortin, M.-J. and Jean Doucet, G. },
    TITLE = { Comparison of plant and animal diversity on new reservoir islands and established lake islands in the northern boreal forest of Quebec },
    JOURNAL = { Canadian Field-Naturalist },
    YEAR = { 1997 },
    VOLUME = { 111 },
    NUMBER = { 3 },
    PAGES = { 407-416 },
    NOTE = { cited By 1 },
    ABSTRACT = { We determined species diversity of passerines, small mammals, and woody plants on new islands of the La Grande-3 hydroelectric reservoir, in the northern boreal forest of Quebec, and compared it with that on natural islands of two large neighbouring lakes. We predicted that species diversity on reservoir islands would be greater than that on lake islands because relaxation (progressive loss of species caused by an excess of extinction over immigration) had not fully operated on reservoir islands due to their relatively recent creation, only 11 years before the study. Animal diversity, richness and species composition were similar in both island groups. Exceptions were a greater abundance of Northern Waterthrush (Seiurus noveboracencis) and Meadow Vole (Microtus pennsylvanicus) on lake islands. However, richness of woody plants on reservoir islands exceeded that on lake islands. We did not find four shrub species in our samples on lake islands which were recorded on reservoir islands. The mean age of trees on lake islands (192 y) significantly exceeded that of trees on reservoir islands (112 yr). In contrast to the mainland, where young stands regenerating following fire abounded, mature forest stands strongly dominated on lake islands. We speculated that fire cycles might be longer on natural islands than on the mainland, and that reservoir islands could become similar to lake islands with time. Difference in plant diversity between island groups may have resulted from differences in fire cycle rather than from time since isolation alone. We discuss the future of reservoir islands with respect to plant and animal diversity. },
    AFFILIATION = { Min. l'Environnement et de la Faune, Service de la Faune Terrestre, 150 Boul. Rene-Levesque Est, Québec, Que. G1R 4Y1, Canada; Centre d'Études Nordiques, Université Laval, Sainte-Foy, Que. G1K 7P4, Canada; Département de Biologie, Université de Sherbrooke, Sherbrooke, Que. J1K 2R1, Canada; Hydro-Québec, 75 boul. Rene-Levesque Ouest, Montréal, Que. H2Z 1A4, Canada },
    AUTHOR_KEYWORDS = { Boreal forest; Diversity; Islands; Isolation; Passerines; Quebec; Small mammals; Woody plants },
    DOCUMENT_TYPE = { Article },
    SOURCE = { Scopus },
    URL = { https://www.scopus.com/inward/record.uri?eid=2-s2.0-0031425239&partnerID=40&md5=c56528021b4981a0b7a521bca0f2cfe3 },
}

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