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Lessons From The Grand Canyon: Dams Destabilize River Food Webs
2013-08-20 10:22:02

Cary Institute of Ecosystem Studies Managing fish in human-altered rivers is a challenge because their food webs are sensitive to environmental disturbance. So reports a new study in the journal Ecological Monographs, based on an exhaustive three-year analysis of the Colorado River in Glen and Grand Canyons. Food webs are used to map feeding relationships. By describing the structure of these webs, scientists can predict how plants and animals living in an ecosystem will respond to...

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2005-04-04 21:15:16

HOOVER DAM, Nev. (AP) -- Water officials from California, Arizona and Nevada joined the federal government Monday in enacting a 50-year plan to protect the lower Colorado River and ensure states are able to get enough water and power from it. The $626 million agreement will benefit "the many important species, including humans, that rely on the Colorado River," said John Keys, commissioner of the Bureau of Reclamation, during a ceremony at the base of the massive Hoover Dam. The program,...

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2005-03-08 07:28:05

TUCSON, Ariz. (AP) -- The number of juvenile endangered fish recovered in the Colorado River declined dramatically after officials flooded the Grand Canyon in an effort to aid them and their fragile ecosystem. But scientists aren't sure what the fish decline means or why it happened. "We're trying to get the same answer," said Jeff Lovich, chief of the Grand Canyon Monitoring and Research Center in Flagstaff. "We don't know what their fate is." Following a 90-hour experimental water release...


Latest Humpback chub Reference Libraries

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2009-01-13 19:58:20

The Bonytail Chub (Gila elegans) is a species of freshwater fish native to certain areas of Arizona, California, Colorado, Nevada and Utah in the United States. Bonytail chub prefer backwaters with rocky or muddy bottoms and flowing pools, although they have been reported in swiftly moving water. They are mostly restricted to rocky canyons today, but were historically abundant in the wide downstream sections of rivers. It is the rarest of the endemic big-river fishes of the Colorado River. It...

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Word of the Day
mundungus
  • A stinking tobacco.
  • Offal; waste animal product; organic matter unfit for consumption.
This word comes from the Spanish 'mondongo,' tripe, entrails.