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11 U.S. species endangered by climate change

Pacific Salmon

Photo: Utah~Dave AA7IZ/Flickr

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Pacific salmon

A vital part of the food chain for humans and wildlife, salmon are threatened across the Pacific coast. Already threatened by dams and overfishing, salmonids typically die when exposed for a length of time to fresh water temperatures above 72 degrees. Global warming has pushed the average summer temperatures of many West Coast river systems above that mortality threshold.