As the climate changes in the western United States, streams are warming, low flows in summer are declining, and winter floods are occurring more often in places where snowmelt is the main source of water (Stewart and others 2005; Hamlet and Lettenmaier 2007; Luce and Holden 2009; Isaak and others 2010). Some of the changes have been subtle, others more noticeable, and they are expected to shift distributions of fishes (Rieman and others 2007; Wenger...
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Nature