The effects of forest harvesting practices on salmonid spawning habitat were examined within a watershed 80 km east of Prince George in the center interior of British Columbia. Deposition of suspended sediment and survival of planted trout eggs (eyed to pre-emergence) were determined in artificial stream channels using simulated spawning redds to determine relationships between suspended sediment, sediment deposition and survival of rainbow trout eggs to emergence of fry. In Centenial Creek, there was no channel disturbance, yet chronic sedimentation occurred from 1972 to 1974. One year after forest harvest operations had terminated, measurements of suspended sediment and gravel composition before and after spring melt indicated significant deposition in the gravel regardless of high flows during spring. Deposition was related to suspended sediment duration (concn in mg/L x time in days). In contrast, in Rosanne Creek shifting of the bottom, creation of potential obstructions to fish migration, and transport
Slaney, P.A., Halsey, T.G.; Tautz, A.F.. 1977. Effects of Forest Harvesting Practices on Spawning Habitat of Stream Salmonids in the Centennial Creek Watershed, British Columbia. Ministry of Environment, Lands and Parks. Fisheries Management Report. FMR73
Topic: Fish and Fish Habitats
Keywords: forest harvesting, forestry, roads, buffer zones, salmonid, spawning habitat, sediment, survival, erosion, roads, buffer zones, Centenial Creek, Rosanne Creek, Slim Creek, British Columbia
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