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Assessment of fish response to perturbation can be based upon a biologically integrated, mechanistic framework that examines the functional relationship between species and their environments. The overall effect of timber harvest on fish populations may then be predicted based on relative species tolerances to a range of potentially changing habitat conditions. We evaluated seven major changes to stream and lake habitats associated with logging and identified linkages to 12 associated functional traits displayed by 91 species or subspecies of fish found in BC's freshwaters. Fish taxa were then scored for trait sensitivities on the basis of information from the literature or expert opinion. Overall assessment of relative sensitivity was based on a composite total score for traits and a k-means clustering analysis that separated fish taxa into three groups defined as low, moderate or high sensitivity to logging impacts. Our clustering method suggested that approximately 76% of BC's freshwater fish taxa (69 of 9
Porter, Marc, Haas, Gordon; Parkinson, Eric. 2000. Sensitivity of British Columbia's Freshwater Fish to Timber Harvest: Using Species Traits as Predictors of Species Risk. Ministry of Agriculture, Food and Fish. Fisheries Management Report. FMR114
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