Difference between revisions of "FOOD BASE"
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| − | *[Wellard-Kelly, 2010, Resource Composition and Macroinvertebrate Resource Consumption in the Colorado River Below Glen Canyon Dam. Master's Theses. ] | + | *[https://ecommons.luc.edu/cgi/viewcontent.cgi?referer=https://www.google.com/&httpsredir=1&article=1554&context=luc_theses&bcsi_scan_16614fa24ff8c4a5=4T5RELybw6AjCcM9fMKSGn+HEokKAAAA8YgGCg==&bcsi_scan_filename=viewcontent.cgi Wellard-Kelly, 2010, Resource Composition and Macroinvertebrate Resource Consumption in the Colorado River Below Glen Canyon Dam. Master's Theses. ] |
*[https://www.gcmrc.gov/library/reports/biological/Foodbase/McKinney1999f.pdf McKinney et al., 2010, Macroinvertebrate drift in the tailwater of a regulated river below Glen Canyon Dam, Arizona. The Southwestern Naturalist] | *[https://www.gcmrc.gov/library/reports/biological/Foodbase/McKinney1999f.pdf McKinney et al., 2010, Macroinvertebrate drift in the tailwater of a regulated river below Glen Canyon Dam, Arizona. The Southwestern Naturalist] | ||
*[http://www.montana.edu/wcross/Cross_website/Publications_files/Cross%20et%20al.%202010.pdf Cross et al. 2010. Invasion and production of New Zealand mud snails in the Colorado River, Glen Canyon. Biol Invasions] | *[http://www.montana.edu/wcross/Cross_website/Publications_files/Cross%20et%20al.%202010.pdf Cross et al. 2010. Invasion and production of New Zealand mud snails in the Colorado River, Glen Canyon. Biol Invasions] | ||
Revision as of 16:56, 22 March 2018
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The Aquatic Food Base below Glen Canyon DamThe Colorado River below Glen Canyon Dam has been altered by dam-induced modifications to the river’s flow, temperature, and sediment supply. Nonnative species have also changed the natural system. Nonnative fish are thought to prey on and compete with native fish, including the endangered humpback chub (Gila cypha). These impacts have likely changed both the amount and sources of energy that fuel the aquatic food web and the flows of energy within the food web. Installation of the dam created a relatively clear, cool aquatic environment below the dam that now allows aquatic plants to capture the sun’s energy, and they in turn are now consumed by a few species, including scuds (Gammarus lacustris), midges (Family: Chironomidae), blackflies (Simulium arcticum), and New Zealand mudsnails (Potamopyrgus antipodarum). The first three species can provide food for both native and nonnative fishes, but fish cannot digest the New Zealand mudsnail. Desired Future Condition for the Aquatic Food BaseThe aquatic food base will sustainably support viable populations of desired species at all trophic levels. Assure that an adequate, diverse, productive aquatic foodbase exists for fish and other aquatic and terrestrial species that depend on those food resources. |
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