2026-04-15T02:07:41Zhttps://repository.lib.bcit.ca/oai/requestoai:repository.lib.bcit.ca:node-15072025-05-13T20:03:30Znode:28oai_pmh:all_repository_itemsThe scale of ecological restoration: restoring steelhead habitat in the Oktwanch Watershed, Vancouver Island, B.C.
Forestry practices are thought to be the major cause of degraded salmonid habitat and declining steelhead populations in the Oktwanch River on Vancouver Island. Large woody debris installations and channel modifications were completed in Reach 1 of the Oktwanch River and adjacent side channels in 2001 to provide spawning and rearing habitat for multiple salmonid species and prevent further degradation, but were ultimately unsuccessful. This study investigated if watershed-scale restoration, rather than reach-scale, is necessary to restore this habitat for steelhead in the Oktwanch River indefinitely. This was achieved through an assessment of fish habitat in Reach 1 of the Oktwanch River and adjacent side channels and spatial analysis of the Oktwanch watershed using Landsat historical aerial imagery and i-Tree Canopy. The findings from this study suggest watershed-scale changes to forestry practices are required to restore steelhead populations in the Oktwanch River.
2022
English
Heckels, Alexander Robert Lee Greene
Ives, Kim
Henault, Lisa
British Columbia Institute of Technology School of Construction and the Environment
2492
PDF
British Columbia Institute of Technology
Text
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Fishes
Forests
Salmon