HarveyBrais2007

Référence

Harvey, B.D. and Brais, S. (2007) Partial cutting as an analogue to stem exclusion and dieback in trembling aspen (Populus tremuloides) dominated boreal mixedwoods: implications for deadwood dynamics. Canadian Journal of Forest Research, 37(9):1525-1533.

Résumé

In the winter of 1998-1999, two partial harvesting treatments that removed 33% (1/3) and 61% (2/3) of stand basal area were applied to even-aged trembling aspen (Populus tremuloides Michx.) stands and compared with unharvested control stands. Stands in the 1/3 treatment were low thinned, while stands in the 2/3 removal were crown thinned. Coarse woody debris dynamics were assessed during the following 6ayears by means of permanent sampling plots and downed wood inventories. Between 1999 and 2004, tree mortality was, respectively, 18%, 17%, and 32% in control stands and 1/3 and 2/3 harvesting treatments. Although total snag density was similar between controls and partial cutting treatments, total snag basal area was significantly higher in controls in 2004. Between 1999 and 2004, net change in aspen snag density was positive for controls and negative for both partial cutting treatments. Partial cutting also exacerbated mortality of small-diameter white birch (Betula papyrifera Marsh.). Downed wood volume increased by 35am(3 center dot)ha(-1) in controls and by 25am(3 center dot)ha(-1) in the 2/3 harvesting treatment, while it decreased by 7am(3 center dot)ha(-1) in the 1/3 harvesting treatment. Coarse woody debris goals can be established in silviculture prescriptions; type, timing, and intensity of partial cutting are crucial to the outcome.

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@ARTICLE { HarveyBrais2007,
    AUTHOR = { Harvey, B.D. and Brais, S. },
    TITLE = { Partial cutting as an analogue to stem exclusion and dieback in trembling aspen (Populus tremuloides) dominated boreal mixedwoods: implications for deadwood dynamics },
    JOURNAL = { Canadian Journal of Forest Research },
    YEAR = { 2007 },
    VOLUME = { 37 },
    PAGES = { 1525-1533 },
    NUMBER = { 9 },
    ABSTRACT = { In the winter of 1998-1999, two partial harvesting treatments that removed 33% (1/3) and 61% (2/3) of stand basal area were applied to even-aged trembling aspen (Populus tremuloides Michx.) stands and compared with unharvested control stands. Stands in the 1/3 treatment were low thinned, while stands in the 2/3 removal were crown thinned. Coarse woody debris dynamics were assessed during the following 6ayears by means of permanent sampling plots and downed wood inventories. Between 1999 and 2004, tree mortality was, respectively, 18%, 17%, and 32% in control stands and 1/3 and 2/3 harvesting treatments. Although total snag density was similar between controls and partial cutting treatments, total snag basal area was significantly higher in controls in 2004. Between 1999 and 2004, net change in aspen snag density was positive for controls and negative for both partial cutting treatments. Partial cutting also exacerbated mortality of small-diameter white birch (Betula papyrifera Marsh.). Downed wood volume increased by 35am(3 center dot)ha(-1) in controls and by 25am(3 center dot)ha(-1) in the 2/3 harvesting treatment, while it decreased by 7am(3 center dot)ha(-1) in the 1/3 harvesting treatment. Coarse woody debris goals can be established in silviculture prescriptions; type, timing, and intensity of partial cutting are crucial to the outcome. },
    KEYWORDS = { COARSE WOODY DEBRIS; NORTHWESTERN QUEBEC; SUSTAINABLE MANAGEMENT; BRITISH-COLUMBIA; WHITE SPRUCE; BALSAM FIR; FOREST; STANDS; DISTURBANCES; ECOSYSTEMS },
    OWNER = { brugerolles },
    TIMESTAMP = { 2007.12.21 },
}

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