Evaluation of competitive effects of green alder, willow and other tall shrubs on white spruce and lodgepole pine in Northern Alberta

Yield Implications of Site Preparation Treatments for Lodgepole Pine and White Spruce in Northern British Columbia

“…where a, b, and c are parameters calculated by Cortini and Comeau [30] for lodgepole pine and white spruce plantations in north-western Alberta. By comparing the growth of the control treatment to the growth of the other treatments at any given time, it was possible to analyze the growth characteristics of the two species investigated.…”

Seedling size and woody competition most important predictors of growth following free-to-grow assessments in four boreal forest plantations

“…The addition of the competition metrics significantly, albeit in some cases not substantially, improved the fit statistics for both tree height and volume growth models for black spruce and jack pine for both time periods for a variety of upland site conditions. Cortini and Comeau (2008) reported that tree, tall shrub, and herbaceous cover influenced the growth of white spruce whereas tall shrubs were the major competitors for lodgepole pine (Pinus contorta Dougl.). Our study also indicated that the competi- tion effects of different competitors depended on the crop tree species, its characteristics (volume and height), and site differences.…”

Feedbacks and synergism among biogeochemistry, basic ecology, and forest soil science

“…desirable hardwood with direct economic value in the mid-1990s (Tarrant et al, 1994). It is now acknowledged that alder plays an important ecological role by providing forage and habitat for wildlife (McComb, 1994;Cortini and Comeau, 2008). Red alder (Alnus rubra Bong.)…”

“…Whether alder provides competition or facilitation to conifers is still very much under debate in production forestry circles, and opinions and evidence vary strongly among scientists and sites (Binkley, 2003;Simard et al, 2006;Cortini and Comeau, 2008).…”