MNN Galleries

11 U.S. species endangered by climate change

By: Bryan Nelson on Jan. 4, 2010, 11:10 a.m.
Pacific Salmon

Photo: Utah~Dave AA7IZ/Flickr

6 of 13

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.