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Last modified
8/11/2009 11:32:58 AM
Creation date
8/10/2009 5:12:54 PM
Metadata
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UCREFRP
UCREFRP Catalog Number
9705
Author
Green River Study Plan ad hoc Committee.
Title
Study plan for the implementation and evaluation of flow and temperature recommendations for endangered fishes in the Green River downstream of Flaming Gorge Dam.
USFW Year
2007.
USFW - Doc Type
Upper Colorado River Endangered Fish Recovery Program
Copyright Material
NO
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<br />GREEN RIVER STUDY PLAN <br /> <br />Vll <br /> <br />February 2, 2007 <br /> <br />backwaters, recommended studies fall into two subject areas: (1) backwater habitat formation <br />and (2) backwater habitat maintenance and quality. For nonnatives, recommended studies fall <br />into two subject areas: (1) the influence of flow and temperature on life history components of <br />nonnative fish, and (2) spillway entrainment rates. <br /> <br />An integrated approach is fundamental to the implementation of this Study Plan. This <br />integrated approach is necessary in order to better understand dynamics of physical and <br />biological resources and to review the scientific basis for the flow and temperature <br />recommendations. Many anticipated effects and uncertainties are interrelated, and specific study <br />designs and results will need to be integrated to gain a better understanding of the effects of the <br />flow and temperature recommendations. Consideration should be given to tradeoffs among <br />potential effects; e.g., base flow magnitudes and temperatures that maximize benefits to <br />endangered fish may also benefit nonnative species that in turn prey upon and compete with <br />endangered forms; spillway use that enhances larval entrainment in floodplains may allow for <br />escapement of nonnative fish from the reservoir into the river downstream. <br /> <br />More integration and synthesis of historic and current information is urged as a first step <br />in the development of sound scientific studies that best evaluate these tradeoffs, address <br />hypotheses, and make greater use of existing information. Furthermore, study refmements are <br />important under the principles of adaptive management to ensure that studies remain focused on <br />the current most vital information needs. <br /> <br />Results from studies recommended in this Study Plan would be used to evaluate and, if <br />deemed appropriate, potentially revise the flow and temperature recommendations in a manner <br />consistent with an adaptive-management approach. Such revisions approved by the Service and <br />the Recovery Program could be implemented directly into the annual operatirig plan or could <br />require a more formal regulatory process requiring National Environmental Policy Act or <br />Endangered Species Act compliance. <br />
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