AK 99507;
Cramer Fish Sciences;
1125 12th Avenue NW;
King County Water & Land Resources Division;
201 S Jackson Street;
Watershed Sciences Lab;
University of Washington;
King Street Center;
1122 NE Boat Street;
WA 98027;
School of Aquatic and Fishery Sciences;
WA 98504;
1111 Washington Street SE;
Olympia;
Seattle;
WA 98195;
Anchorage;
USA;
123 Easy Street;
Wenatchee;
Suite 5600;
Upper Columbia Salmon Recovery Board;
WA 98104-3855;
WA 98801;
Washington Department of Fish and Wildlife;
4700 BLM Road;
Bureau of Land Management;
Issaquah;
期刊名称：
Canadian Journal of Fisheries and Aquatic Sciences
Floodplain habitat restoration has become a common component of river restoration throughout the Pacific Northwest and is critical to the recovery of Pacific salmon (Oncorhynchus spp.) and steelhead (Oncorhynchus mykiss), yet little information exists on the physical or biological response to these habitat restoration efforts. Using an extensive post-treatment design and a combination of remote sensing and field surveys, we sampled 17 floodplain projects designed to benefit anadromous fish in the Columbia River Basin. We detected significant increases in side channel metrics (area, length, and the ratio of bankfull side-channel to main channel length), sinuosity, pool frequency, large wood, and the morphological quality index. On average, juvenile Chinook (Oncorhynchus tshawytsch), coho (Oncorhynchus kisutch), steelhead, and salmonid combined abundance was 1.17, 4.62,1.62, and 1.65 times higher, respectively, in treatment reaches compared to control reaches, though these increases were only significant for steelhead and all salmonids combined. Our study demonstrated that a combination of remote sensing and field data can be used to monitor floodplain and instream habitat and detect fish response to floodplain restoration projects.
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