Global warming speeds diversity threats to native fish

Summit County Citizens Voice

Study looks at hybridization of trout in Northern Rocky Mountains

Biologists study trout in the Blue River in Silverthorne, Colorado. @bberwyn photo.

Staff Report

Global warming is intensifying the hybridization of native and non-native trout in the northern Rocky Mountains, according to a new study from the U.S. Geological Survey and other scientists. The trend is a serious threat to the biodiversity of Rocky Mountain aquatic ecosystems, says the study published in the journal Global Change Biology.

As non-native rainbow trout, introduced by early settlers, interbreed with cutthroat trout it leads to a decline in local adaptations that can threaten the long-term survival of species. Preserving the  genetic integrity of native species is important for  resiliency, the scientists said.

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