![]() Over a century of mining, primarily for gold, has been the main source of this disturbance. An aerial photo of Woodchopper Creek, Yukon-Charley Rivers National Preserve showing the effects of extensive dredge mining.Īlthough the popular image of Alaska and its national parks is one of vast tracts of unspoiled wilderness, in fact, human disturbance has had significant impacts on stream ecosystems in many areas, particularly in interior Alaska.
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