Article: Stand-level prediction of balsam fir mortality in relation to spruce budworm defoliation.

Abstract: Stand production and sustained yield calculations are largely affected by tree mortality, which can be caused by many factors such as competition, insect damage, or climatic events. In the eastern Canadian boreal forest, spruce budworm (Choristoneura fumiferana (Clem.)) defoliation can produce varying levels of mortality in balsam fir (Abies balsamea (L.) Mill.) stands. This mortality was estimated for the entire range of balsam fir in Quebec, Canada, using historical records of insect defoliation and permanent sample plot (PSP) inventories for the 1970-2003 period, which includes the last insect outbreak. A two-step approach was used to model balsam fir ...

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