Estimating the benefits of widespread floodplain reconnection for Columbia River Chinook salmon
Open accessAbstract
In the Pacific Northwest, widespread stream channel simplification has led to a loss of habitat area and diversity for rearing salmon. Subsequent efforts throughout the Columbia River basin (CRB) have attempted to restore habitats altered through land development to recover imperiled salmon populations. However, there is scant evidence for demographic change in salmon populations following restoration. We used a process-based approach to estimate the potential benefit of floodplain reconnection throughout the CRB to Chinook salmon (Oncorhynchus tshawytscha) parr. Using satellite imagery, we measured stream habitats at 2093 CRB stream reaches to construct random forest models of habitat based on geomorphic and regional characteristics. Connected floodplain width was the most important factor for determining side channel presence. We estimated a current CRB-wide decrease in side channel habitat area of 26% from historical conditions. Reconnection of historical floodplains currently used for agriculture could increase side channel habitat by 25% and spring Chinook salmon parr total rearing capacity by 9% over current estimates. Individual watersheds vary greatly in habitat factors that limit salmon recovery, and large-scale estimates of restoration potential like these are needed to make decisions about long-term restoration goals among imperiled populations.
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The methodology used here should be broadly applicable to evaluation of long-term changes in systems used by migrating salmonids along the West Coast of North America and beyond.
“The methodology used here should be broadly applicable to evaluation of long-term changes in systems used by migrating salmonids; i.e., along the West Coast of North America and beyond (Bidlack et al. 2021;Bond et al. 2018;Buijse et al. 2002;Opperman et al. 2010).”
From Shallow-Water Habitat in the Lower Columbia River Estuary: A Highly Altered System (2024) · cites this paper as Bond et al. 2018
The Methods overview describes a basin-scale method for estimating Chinook salmon rearing habitat in Columbia River tributaries, and the Discussion compares historical, contemporary, and potential restored side-channel habitat. Those passages support its use to evaluate habitat change in one salmonid system, but do not establish applicability to migrating salmonids broadly along the West Coast or beyond (page numbers unavailable in our copy). (LLM, conf=0.82)
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Cited by
Sorted by citations
Shallow-Water Habitat in the Lower Columbia River Estuary: A Highly Altered System
Templeton, W. J., Jay, D. A., Diefenderfer, H. L., & Talke, S. A. (2024) · Estuaries and Coasts · doi:10.1007/s12237-023-01229-3 · Cited by 5 · see citing works
“The methodology used here should be broadly applicable to evaluation of long-term changes in systems used by migrating salmonids; i.e., along the West Coast of North America and beyond (Bidlack et al. 2021; Bond et al. 2018; Buijse et al. 2002; Opperman et al. 2010).”
- Authors
- Bond, M. H., Nodine, T. G., Beechie, T. J., & Zabel, R. W.
- Affiliations
- National Oceanic and Atmospheric Administration (US)
- Fish Ecology Division, Northwest Fisheries Science Center, National Marine Fisheries Service, National Oceanic and Atmospheric Administration, 2725 Montlake Blvd. E., Seattle, WA 98112, USA.
- NOAA National Marine Fisheries Service (US)
- Corresponding author
- Nodine, Tyler G.
- Venue
- Canadian Journal of Fisheries and Aquatic Sciences
- Publisher
- Canadian Science Publishing
- Published
- 2019-07
- Volume
- 76
- Issue
- 7
- Pages
- 1212-1226
- ISSN
- 0706-652X (ISSN-L)
- 1205-7533
- OpenAlex
- W2891628108
- Cited by
- 41
- References
- 2
- Citations by year
- 2026: 6 · 2025: 4 · 2024: 6 · 2023: 8 · 2022: 8 · 2021: 7 · 2020: 2
- FWCI
- 1.77
- Type
- journal article
- Language
- en
- Open access
- Locations
- Canadian Journal of Fisheries and Aquatic Sciences (publishedVersion)
- TSpace (University of Toronto) (acceptedVersion)
- NOAA Institutional Repository (submittedVersion)
- Funders
- National Oceanic and Atmospheric Administration
- National Marine Fisheries Service
- Topics
- Physical Sciences › Environmental Science › Nature and Landscape Conservation › Fish Ecology and Management Studies
- Physical Sciences › Environmental Science › Ecology › Hydrology and Sediment Transport Processes
- Physical Sciences › Environmental Science › Ecology › Ecology and biodiversity studies
- Keywords
- floodplain reconnection, Oncorhynchus tshawytscha, Columbia River Basin, habitat loss, habitat restoration, parr, floodplain width, agricultural land use, restoration potential
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