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The Colorado River that runs through Grand Canyon National Park supplies water to nearly forty million people in the West. But longstanding programs to…
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This weekend, managers at Glen Canyon Dam will begin a first-of-its-kind experiment to release water that benefits bugs, which play a vital role in the…
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The U.S. Fish and Wildlife Service says a fish native to the Colorado River is no longer in immediate danger of extinction. KNAU’s Melissa Sevigny reports…
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An environmental group in Utah wants to drain Lake Powell and move its water downstream to Lake Mead. Supporters say the plan will save water and restore…
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The U.S. Fish and Wildlife Service decided today not to list two Colorado River Basin minnows under the Endangered Species Act. Arizona Public Radio’s…
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Three types of chub in the Colorado River watershed may actually be the same species of fish. The finding raises questions about their protections under…
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An experimental release of water begins today at Glen Canyon Dam. The artificial flood will rebuild sandbars and improve wildlife habitat on the Colorado…
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Fish and frogs swim slower when they’re exposed to pesticides, according to a review study by two Northern Arizona University biologists.Molly…
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Several species of aquatic insects are mysteriously missing from the Colorado River in the Grand Canyon. Scientists now know that’s because dam managers…
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Over the past hundred years, people have introduced dozens of non-native fish species into the Colorado River and its tributaries. During that time,…