Forest Investment Account

Abstract of FII Project R04-010

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Spruce budworm disturbance of the boreal forest of British Columbia: damage, risk and ecosystem changes

Author(s): Alfaro, René (Canadian Forest Service)
Subject: Entomology, Forestry, Silviculture/Forest Management Systems, Technology/GIS/Modeling/Remote Sensing
Series: Forest Investment Account (FIA) - Forest Science Program


Spruce budworm disturbance study in the Fort Nelson District is providing information needed to support policies, regulations and guidelines and to promote more effective use of forest resources. This includes information and methods for monitoring, timber supply planning and certification. The impact of defoliation on stand composition, age, diameter distribution, regeneration, coarse woody debris, and snag availability is measured using an existing network of ground plots. Dendro-chronology methods are used to determine the historical recurrence of budworm. Remote sensing is used to measure changes in this disturbance and provide methods for use in this and other Districts of BC. These methods will be important to document changes in resource availability due to the combined action of budworm depletions, harvesting and reforestation. Ground, aerial and satellite measurements of budworm disturbance will be intersected with landscape attributes to determine factors that increase stand susceptibility to budworm and risk of tree mortality.

For further information, please contact René Alfaro, Canadian Forest Service (

Updated September 08, 2005 

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