There are encouraging signs that there still exist small pools of genetic material to reconstruct the diverse piscine ecologies of the past with careful management and conservation efforts. Outside of the implications for fly fishermen, there is general scientific consensus that preservation of all life forms may offer as yet unknown insights into ways to protect the environment for our own preservation.
However, ecologies and the environment are not, and have never been static. New evidence that the unprecedented rate of climate change is potentially driving other dynamics that could threaten the integrity of trout lineages. As reported by NBC news, drought and globally increased temperatures have lowered flows in many rivers in the West, raising critical water temperatures to allow introduced trout species such as Rainbow trout that normally would not inhabit frigid headwater spawning streams to interact and interbreed with native fishes such as Cutthroat.
Read more: http://www.flyfisherman.com/news/extinct-trout-on-the-rebound/#ixzz4fSAhsMy6