BoucherGauthierDe2006

Référence

Boucher, D., Gauthier, S. and De Grandpre, L. (2006) Structural changes in coniferous stands along a chronosequence and a productivity gradient in the northeastern boreal forest of Quebec. Ecoscience, 13(2):172-180. (Scopus )

Résumé

The influence of stand age and site conditions on the structure of coniferous stands was studied in the boreal forest of Que?bec's Co?te-Nord, a region with low fire recurrence. Stand diameter diversity was measured in 2202 forest inventory plots in black spruce (Picea mariana), balsan fir (Abies balsamea), and mixed stands using the Shannon-Wiener diversity index. A relative productivity index was developed based on the relationship between height and age of dominant trees. A stepwise regression analysis indicated that this productivity index best explains stand structure variation in all composition types, while stand age seems to influence structure more at the beginning of stand development. The results suggest that productive stands become uneven-sized earlier than unproductive stands and also maintain a greater diameter diversity. These contrasting structural dynamics may be explained by (i) a higher growth rate in richer stands that likely induces earlier senescence and thus an earlier passage to an uneven-sized structure and (ii) a restricted maximum tree diameter in poor stands caused by a scarcity of resources, which in turn reduces the diameter diversity of these stands, even after their break-up time.

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@ARTICLE { BoucherGauthierDe2006,
    AUTHOR = { Boucher, D. and Gauthier, S. and De Grandpre, L. },
    TITLE = { Structural changes in coniferous stands along a chronosequence and a productivity gradient in the northeastern boreal forest of Quebec },
    JOURNAL = { Ecoscience },
    YEAR = { 2006 },
    VOLUME = { 13 },
    PAGES = { 172-180 },
    NUMBER = { 2 },
    ABSTRACT = { The influence of stand age and site conditions on the structure of coniferous stands was studied in the boreal forest of Que?bec's Co?te-Nord, a region with low fire recurrence. Stand diameter diversity was measured in 2202 forest inventory plots in black spruce (Picea mariana), balsan fir (Abies balsamea), and mixed stands using the Shannon-Wiener diversity index. A relative productivity index was developed based on the relationship between height and age of dominant trees. A stepwise regression analysis indicated that this productivity index best explains stand structure variation in all composition types, while stand age seems to influence structure more at the beginning of stand development. The results suggest that productive stands become uneven-sized earlier than unproductive stands and also maintain a greater diameter diversity. These contrasting structural dynamics may be explained by (i) a higher growth rate in richer stands that likely induces earlier senescence and thus an earlier passage to an uneven-sized structure and (ii) a restricted maximum tree diameter in poor stands caused by a scarcity of resources, which in turn reduces the diameter diversity of these stands, even after their break-up time. },
    ADDRESS = { Natural Resources Canada, Canadian Forest Service, Laurentian Forestry Centre, P.O .Box 10380, Quebec, Que. G1V 4C7, Canada },
    COMMENT = { Export Date: 26 September 2007 Source: Scopus Language of Original Document: English Correspondence Address: Boucher, D.; Groupe de Recherche en E?cologie Forestie?re Interuniversitaire (GREFi); Universite? du Que?bec a? Montre?al; C.P. 8888 Montre?al, Que. H3C 3P8, Canada; email: dominique.boucher@nrcan.gc.ca },
    ISSN = { 11956860 (ISSN) },
    KEYWORDS = { Abies balsamea, Balsam fir stands, Black spruce stands, Picea mariana, Site productivity, Stand diameter distribution, Stand dynamics, Stand structure },
    OWNER = { Luc },
    TIMESTAMP = { 2007.09.26 },
    URL = { http://www.scopus.com/scopus/inward/record.url?eid=2-s2.0-33746279667&partnerID=40&rel=R6.5.0 },
}

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