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    Long-term stand dynamics of the boreal mixed-wood forests of west-central Manitoba

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    LEVAC_JOSHUA.pdf (3.841Mb)
    Date
    2012-04-03
    Author
    Levac, Joshua
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    Abstract
    To understand the temporal dynamics of a forest, long-term direct observations are required. My study examined the long-term persistence of trembling aspen (Populus tremuloides Michx) and white spruce (Picea glauca (Moench) Voss) in the boreal mixed-wood forests of Riding Mountain National Park. A set of 266, disturbance-free, permanent sample plots were established in 1947 (stand age = 120 years) and followed through time for 55 years. My results indicate that although the density and basal areas of aspen do decline over the 55-year period, a successful regeneration and establishment occurs around 140 years. The long-term persistence of aspen is a result of clonal reproduction following the canopy breakup beginning around 130 years or earlier. This implies that the long-term persistence of both aspen and spruce occur and the expected succession to softwood dominance does not occur.
    URI
    http://hdl.handle.net/1993/5234
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    • FGS - Electronic Theses and Practica [25494]
    • Manitoba Heritage Theses [6053]

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