Forest Investment Account (FIA) - Land Base Investment Program
FIA Project 4847011

    Forest Health Efficacy
Project lead: Forest Health TSA 29 Williams Lake
Contributing Authors: Coggins, Sam; Jack, David
Subject: Forest Investment Account (FIA), British Columbia
Series: Forest Investment Account (FIA) - Land Base Investment Program
In 2006 and 2007 intensive aerial and ground surveys were conducted to identify the severity and extent of infestations caused by the Douglas-fir beetle within the Knife Creek block. Historic data from 2002, 2003, and 2005 were also utilized to establish beetle infestation trends within the forest. The analyses conducted for this report includes an overview of the influence of: age-class, biogeoclimatic ecosystem classification, and wind speed and temperature on the location of beetle attacks. Next, an analysis of the influence of beetle control techniques initiated by Alex Fraser Research Forest. These techniques are specifically used to control Douglas-fir beetle infestations and included: anti-aggregation pheromone plots and trap trees. The influence of forest management on beetle attack intensity was also examined and included: recently harvested areas, wildlife tree patches, forest openings, and deferred areas. Lastly, a density surface analysis was performed to examine the spatial distribution of Douglas-fir beetle infestations. Analysis showed that age-class distribution was the most significant influence on Douglas-fir beetle within the Knife Creek block. The data does indicate a bias towards drier sites. Wind patterns on site provide evidence that on average there is a distinct directional pattern but had limited influence on beetle infestations. Age-class distribution also tends to influence the location of recently harvested areas, wildlife tree patches, and openings. Analysis of direct management control techniques was limited by the influence of age-class and the need for 2008 data. Areas of high susceptibility have been identified that would benefit most from a monitor and treatment program.


Douglas-fir Bark Beetle Monitoring Program (2.7Mb)

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Updated August 16, 2010 

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