Salmon lose diversity in managed rivers, reducing resilience to environmental change

December 5, 2019
From the National Oceanic and Atmospheric Administration (NOAA)

The manipulation of rivers in California is jeopardizing the resilience of native Chinook salmon. It compresses their migration timing to the point that they crowd their habitats. They may miss the best window for entering the ocean and growing into adults, new research shows.

The good news is that even small steps to improve their access to habitat and restore natural flows could boost their survival.

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Authors of the research included scientists from University of California Davis, University of California Berkeley, U.S Fish and Wildlife Service, California Department of Fish and Wildlife, University of California Santa Cruz, Cramer Fish Sciences, University of California San Francisco, and NOAA Fisheries. Funding was provided by the U.S. Fish and Wildlife Service, California Department of Fish and Wildlife, and the Bureau of Reclamation.

Photo: Rachel Johnson, NOAA Fisheries/University of California, Davis

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