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Elevated mortality of residual trees following single-tree felling in northern hardwood forests
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Elevated mortality of residual trees following single-tree felling in northern hardwood forests
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Elevated mortality of residual trees following single-tree felling in northern hardwood forests
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Journal Article
Elevated mortality of residual trees following single-tree felling in northern hardwood forests
2006
Overview
In this paper, I examine tree mortality in northern hardwood forests subjected to single-tree felling. Mortality risk was estimated as a function of growth prior to harvest and time since harvest. This allowed me to separately quantify mortality due to (1) natural processes, (2) intentional felling, and (3) stress and (or) felling damage (postcut mortality). The long-term rate of mortality due to natural causes was 1.5% per year. The intentional felling of trees increased the average mortality to 3.1%, and postcut mortality of residual trees increased the average an additional 0.2%-3.3% (the latter reflects both the direct negative effects of harvesting and the indirect positive effect of releasing residual trees from suppression). Thus, from a population-level perspective, the increased mortality caused by stress and (or) felling damage to residual trees was small compared to that caused by both natural mortality and tree felling. However, the long-term population average obscures more dramatic (though transient) effects of felling on small trees (DBH <10 cm), for which mortality rates increased by as much as 5% immediately after felling. This increase is several times greater than the natural mortality rate for small trees and may therefore have a substantial impact on stand structure and community dynamics.
Publisher
NRC Research Press,National Research Council of Canada,Canadian Science Publishing NRC Research Press
Subject
/ Biological and medical sciences
/ Birds
/ felling
/ Forest harvesting and working in forest
/ Forestry
/ Forests
/ Fundamental and applied biological sciences. Psychology
/ logging
/ Methods
/ Ontario
/ Stand types and stand dynamics. Silvicultural treatments. Tending of stands. Natural regeneration
/ Trees
