Drolet1997

Reference

Drolet, B. (1997) Variation des assemblages d'oiseaux chanteurs selon la structure du paysage de la sapiniere boreale exploitee. Master's thesis, Universite Laval (Canada).

Abstract

In the southern boreal forest of Quebec, natural processes and harvesting methods generate a mosaic of forest stands of different ages. Management strategies vary, creating widely a differing degree of forest fragmentation, which may affect species habitat selection. The response of boreal balsam fir forest songbirds to two different scales of post-harvest fragmentation were studied. During June 1995, 94 and 71 fixed-radius point counts were conducted in a predominantly forested matrix punctuated with small cuts and in a fragmented forest, respectively. All point count stations were placed in mature stands. Using SPOT satellite images, areas within 10 ha and 100 ha of point counts were analyzed for the effects of local and regional landscape structure on nesting bird diversity. Measures of landscape structure (e.g.: area and edge contrast, among others) were computed using FRAGSTATS. Canonical correspondence analysis was used to associate species occurrence with forest structure. Species composition was also compared using permutation tests of species similarity indices among point counts. The results support the hypothesis that songbird habitat selection occurs not just at the stand scale but also at a larger landscape scale. The difference between species composition of songbird assemblages increased with increased difference between landscape mature forest cover. The landscape structure significantly affected the occurrence of 12 of the 18 species considered, both at the 10 ha and 100 ha spatial scale. The species most sensitive to increased fragmentation were: Brown Creeper (Certhia americana), Bay-breasted Warbler (Dendroica castanea), Boreal Chickadee (Parus hudsonicus), Black-throated Green Warbler (D. virens) and Golden-crowned Kinglet (Regulus satrapa).

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@MASTERSTHESIS { Drolet1997,
    AUTHOR = { Drolet, B. },
    TITLE = { Variation des assemblages d'oiseaux chanteurs selon la structure du paysage de la sapiniere boreale exploitee },
    SCHOOL = { Universite Laval (Canada) },
    YEAR = { 1997 },
    TYPE = { M.Sc. },
    NOTE = { CEFTMS, Desrochers, A. and Fortin, M.-J., Canada },
    ABSTRACT = { In the southern boreal forest of Quebec, natural processes and harvesting methods generate a mosaic of forest stands of different ages. Management strategies vary, creating widely a differing degree of forest fragmentation, which may affect species habitat selection. The response of boreal balsam fir forest songbirds to two different scales of post-harvest fragmentation were studied. During June 1995, 94 and 71 fixed-radius point counts were conducted in a predominantly forested matrix punctuated with small cuts and in a fragmented forest, respectively. All point count stations were placed in mature stands. Using SPOT satellite images, areas within 10 ha and 100 ha of point counts were analyzed for the effects of local and regional landscape structure on nesting bird diversity. Measures of landscape structure (e.g.: area and edge contrast, among others) were computed using FRAGSTATS. Canonical correspondence analysis was used to associate species occurrence with forest structure. Species composition was also compared using permutation tests of species similarity indices among point counts. The results support the hypothesis that songbird habitat selection occurs not just at the stand scale but also at a larger landscape scale. The difference between species composition of songbird assemblages increased with increased difference between landscape mature forest cover. The landscape structure significantly affected the occurrence of 12 of the 18 species considered, both at the 10 ha and 100 ha spatial scale. The species most sensitive to increased fragmentation were: Brown Creeper (Certhia americana), Bay-breasted Warbler (Dendroica castanea), Boreal Chickadee (Parus hudsonicus), Black-throated Green Warbler (D. virens) and Golden-crowned Kinglet (Regulus satrapa). },
    KEYWORDS = { Ecology Forestry },
    OWNER = { brugerolles },
    TIMESTAMP = { 2008.01.08 },
}

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