Difference between revisions of "FOOD BASE"
From Glen Canyon Dam AMP
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'''2016''' | '''2016''' | ||
*[http://www.usbr.gov/uc/rm/amp/amwg/mtgs/16aug24/Attach_07a.pdf Grand Canyon Monitoring and Research Center Science Updates (BO Compliance, Trout Updates, Green Sunfish, Fisheries PEP, Partners in Science)] | *[http://www.usbr.gov/uc/rm/amp/amwg/mtgs/16aug24/Attach_07a.pdf Grand Canyon Monitoring and Research Center Science Updates (BO Compliance, Trout Updates, Green Sunfish, Fisheries PEP, Partners in Science)] | ||
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*[http://www.usbr.gov/uc/rm/amp/amwg/mtgs/16aug24/Attach_11b.pdf Aquatic Foodbase of the Little Colorado River] | *[http://www.usbr.gov/uc/rm/amp/amwg/mtgs/16aug24/Attach_11b.pdf Aquatic Foodbase of the Little Colorado River] | ||
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*A Life History Bottleneck for Aquatic Insects Arising from Load Following | *A Life History Bottleneck for Aquatic Insects Arising from Load Following | ||
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*[[Media:Miller and Judson-2013-DriftAndHydropeaking.pdf| Miller and Judson. 2013. Responses of macroinvertebrate drift, benthic assemblages, and trout foraging to hydropeaking. Can. J. Fish. Aquat. Sci. 71: 675–687]] | *[[Media:Miller and Judson-2013-DriftAndHydropeaking.pdf| Miller and Judson. 2013. Responses of macroinvertebrate drift, benthic assemblages, and trout foraging to hydropeaking. Can. J. Fish. Aquat. Sci. 71: 675–687]] | ||
*[http://www.usbr.gov/uc/rm/amp/twg/mtgs/13nov06/Attach_02a.pdf GCMRC Update - Status of Resources and Sediment Conditions] | *[http://www.usbr.gov/uc/rm/amp/twg/mtgs/13nov06/Attach_02a.pdf GCMRC Update - Status of Resources and Sediment Conditions] | ||
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*[http://www.gcmrc.gov/about/foodbase/Kennedy%20et%20al.%20FWB%20proofs.pdf Kennedy et al. 2013. The relation between invertebrate drift and two primary controls, discharge and benthic densities, in a large regulated river] | *[http://www.gcmrc.gov/about/foodbase/Kennedy%20et%20al.%20FWB%20proofs.pdf Kennedy et al. 2013. The relation between invertebrate drift and two primary controls, discharge and benthic densities, in a large regulated river] | ||
*[http://www.gcmrc.gov/about/annaul_reporting/Tuesday%201_22_13/6.%20Kennedy_2013Annual%20Report.pdf Annual Reporting Meeting: Foodbase Update] | *[http://www.gcmrc.gov/about/annaul_reporting/Tuesday%201_22_13/6.%20Kennedy_2013Annual%20Report.pdf Annual Reporting Meeting: Foodbase Update] | ||
'''2012''' | '''2012''' | ||
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*[http://www.usbr.gov/uc/rm/amp/amwg/mtgs/01apr12/Attach_08a.pdf Temperatures, TCD, and Food Base] | *[http://www.usbr.gov/uc/rm/amp/amwg/mtgs/01apr12/Attach_08a.pdf Temperatures, TCD, and Food Base] | ||
'''2011''' | '''2011''' | ||
*[http://www.gcmrc.gov/about/foodbase/Cross%20et%20al.%202011_EA.pdf Ecosystem ecology meets adaptive management: Food web response to a controlled flood on the Colorado River, Glen Canyon] | *[http://www.gcmrc.gov/about/foodbase/Cross%20et%20al.%202011_EA.pdf Ecosystem ecology meets adaptive management: Food web response to a controlled flood on the Colorado River, Glen Canyon] | ||
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'''2010''' | '''2010''' | ||
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*[http://pubs.usgs.gov/of/2010/1031/of2010-1031.pdf Short-Term Effects of the 2008 High-Flow Experiment on Macroinvertebrates in Colorado River Below Glen Canyon Dam, Arizona] | *[http://pubs.usgs.gov/of/2010/1031/of2010-1031.pdf Short-Term Effects of the 2008 High-Flow Experiment on Macroinvertebrates in Colorado River Below Glen Canyon Dam, Arizona] | ||
*[http://pubs.usgs.gov/of/2010/1075/of2010-1075.pdf Basal Resources in Backwaters of the Colorado River Below Glen Canyon Dam—Effects of Discharge Regimes and Comparison with Mainstem Depositional Environments] | *[http://pubs.usgs.gov/of/2010/1075/of2010-1075.pdf Basal Resources in Backwaters of the Colorado River Below Glen Canyon Dam—Effects of Discharge Regimes and Comparison with Mainstem Depositional Environments] | ||
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'''1999''' | '''1999''' | ||
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'''1991''' | '''1991''' | ||
*[http://www.riversimulator.org/Resources/GCMRC/FoodBase/Haury1991.pdf Zooplankton of the Colorado River: Glen Canyon Dam to Diamond Creek] | *[http://www.riversimulator.org/Resources/GCMRC/FoodBase/Haury1991.pdf Zooplankton of the Colorado River: Glen Canyon Dam to Diamond Creek] | ||
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'''1981''' | '''1981''' | ||
Revision as of 13:33, 27 March 2017
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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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