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Title: Long-term stand dynamics of the boreal mixed-wood forests of west-central Manitoba
Authors: Levac, Joshua
Supervisor: Kenkel, Norman (Biological Sciences)
Examining Committee: Ford, Bruce (Biological Sciences) Walker, David (Environment and Geography)
Graduation Date: May 2012
Keywords: forest ecology
boreal mixed-woods
trembling aspen
white spruce
Issue Date: 3-Apr-2012
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.
Appears in Collection(s):FGS - Electronic Theses & Dissertations (Public)
Manitoba Heritage Theses

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