River Food Webs Threatened by Widespread Hydropower Practice (3 of 3) (IMAGE)

U.S. Geological Survey

River Food Webs Threatened by Widespread Hydropower Practice (3 of 3)

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Endangered humpback chub in the Grand Canyon rely on aquatic insects as a primary food source.

The decline of aquatic insects downstream from some hydroelectric dams has been linked to a widespread practice known as hydropeaking, whereby river flows are increased during the day when electricity demands are large, according to a new study led by the US Geological Survey, along with researchers from Oregon State University, Utah State University and Idaho State University. Findings show it may be possible to mitigate these negative effects by using alternative hydropower practices.

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David Herasimtschuk © Freshwaters Illustrated

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