Abstract
Climate warming is expected to have substantial impacts on native trout across the Rocky Mountains, but there is little understanding of how these changes affect future distributions of co-occurring native fishes within population strongholds. We used mixed-effects logistic regression to investigate the role of abiotic (e.g., temperature) and biotic factors (bull trout presence, Salvelinus confluentus) on distributions of westslope cutthroat trout (Oncorhynchus clarkii lewisi; WCT) in the North Fork Flathead River, USA and Canada. The probability of WCT presence increased with stream temperature and decreased with channel gradient and bull trout presence, yet the effect of bull trout was reduced with increasing pool densities. Combining this model with spatially explicit stream temperature projections, we predict a 29% increase in suitable habitat under high emissions through 2075, with gains at mid-elevation sites predicted to exceed bull trout thermal tolerances and high-elevation sites expected to become more thermally suitable for WCT. Our study illustrates the importance of considering abiotic and biotic drivers to assess species response to climate change, helping to guide local-scale climate adaptation and management.
| Original language | English |
|---|---|
| Pages (from-to) | 444-456 |
| Number of pages | 13 |
| Journal | Canadian Journal of Fisheries and Aquatic Sciences |
| Volume | 78 |
| Issue number | 4 |
| DOIs | |
| State | Published - 2021 |
Funding
We acknowledge, with respect, the Indigenous nations on whose traditional homelands the fieldwork for this study took place and whose cultural relationships with the land remain today. We thank the six anonymous reviewers whose comments substantially improved the quality of this manuscript. The Bonneville Power Administration (grant 199101903), Montana Fish, Wildlife, and Parks, and the US Geological Survey funded this work. We thank the field crews who collected these data, especially Durae Belcer, Carter Fredenberg, Ben Galloway, Steve Glutting, Rick Hunt, and Terra Marotz.We also appreciate the help personnel at the British Columbia Ministry of Forests, Lands, and Natural Resource Operations provided in acquiring permits (01A-2012, 01-2012, 07-2013) for the fieldwork performed in the Canadian portion of the study area. Eby was partially supported by McIntire Stennis, project No. MONZ17004, accession No. 1012434 from the USDA National Institute of Food and Agriculture. All work was performed in accordance with the Animal Welfare Act and subsequent amendments. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the US Government. We acknowledge, with respect, the Indigenous nations on whose traditional homelands the fieldwork for this study took place and whose cultural relationships with the land remain today. We thank the six anonymous reviewers whose comments substantially improved the quality of this manuscript. The Bonneville Power Administration (grant 199101903), Montana Fish, Wildlife, and Parks, and the US Geological Survey funded this work. We thank the field crews who collected these data, especially Durae Belcer, Carter Fredenberg, Ben Galloway, Steve Glutting, Rick Hunt, and Terra Marotz. We also appreciate the help personnel at the British Columbia Ministry of Forests, Lands, and Natural Resource Operations provided in acquiring permits (01A-2012, 01-2012, 07-2013) for the fieldwork performed in the Canadian portion of the study area. Eby was partially supported by McIntire Stennis, project No. MONZ17004, accession No. 1012434 from the USDA National Institute of Food and Agriculture. All work was performed in accordance with the Animal Welfare Act and subsequent amendments. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the US Government.
| Funder number |
|---|
| 1012434, MONZ17004 |
| 01-2012, 07-2013, 01A-2012 |
| 199101903 |
UN SDGs
This output contributes to the following UN Sustainable Development Goals (SDGs)
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SDG 13 Climate Action
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