Earth Sciences

Glacier retreat creating new Pacific salmon habitat in western North America

K. J. Pitman, J. W. Moore, et al.

Discover how glacier retreat may open new habitats for Pacific salmon, despite the challenges posed by climate change. This research, conducted by Kara J. Pitman and her colleagues, reveals the potential for over 1,900 kilometers of new spawning grounds by the year 2100.

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Index

Abstract

Glacier retreat, driven by climate change, presents both risks and opportunities for Pacific salmon populations. While reduced summer streamflow and warming waters negatively impact salmon habitat, glacier retreat creates new streams and lakes that salmon can potentially colonize. This study projects future gains in Pacific salmon freshwater habitat by integrating a model of glacier mass change with a model of salmon stream habitat potential. Results indicate that by 2100, glacier retreat will create 6,146 (±1,619) km of new streams, with 1,930 (±569) km potentially suitable for spawning and juvenile rearing. These findings highlight the complex impacts of climate change and inform proactive management and conservation strategies for Pacific salmon.

Publisher

Nature Communications

Published On

Dec 17, 2021

Authors

Kara J. Pitman, Jonathan W. Moore, Matthias Huss, Matthew R. Sloan, Diane C. Whited, Tim J. Beechier, Rich Brenner, Eran W. Hood, Alexander M. Milner, George R. Pess, Gordan H. Reeves, Daniel E. Schindler

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