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Surprise and Opportunity for Learning in Grand Canyon: the Glen Canyon Dam Adaptive Management Program Ecology and Society
Melis, Theodore S; U.S. Geological Survey, Southwest Biological Science Center, Grand Canyon Monitoring and Research Center; tmelis@usgs.gov; Walters, Carl J; Fisheries Centre, University of British Columbia; c.walters@fisheries.ubc.ca; Korman, Josh; Ecometric Research Inc.; jkorman@ecometric.com.
With a focus on resources of the Colorado River ecosystem below Glen Canyon Dam, the Glen Canyon Dam Adaptive Management Program has included a variety of experimental policy tests, ranging from manipulation of water releases from the dam to removal of non-native fish within Grand Canyon National Park. None of these field-scale experiments has yet produced unambiguous results in terms of management prescriptions. But there has been adaptive learning, mostly from unanticipated or surprising resource responses relative to predictions from ecosystem modeling. Surprise learning opportunities may often be viewed with dismay by some stakeholders who might not be clear about the purpose of science and modeling in adaptive management. However, the experimental...
Tipo: Peer-Reviewed Insight Palavras-chave: Adaptive management; Colorado River; Ecosystem modeling; Glen Canyon Dam; Grand Canyon; High-flow experiments; Humpback chub; Rainbow trout; Surprise learning.
Ano: 2015
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Ecosystem Modeling for Evaluation of Adaptive Management Policies in the Grand Canyon Ecology and Society
Walters, Carl J; University of British Columbia; c.walters@fisheries.ubc.ca; Korman, Josh; Ecometric Research Inc.; jkorman@ecometric.com; Stevens, Lawrence E; Stevens Ecological Consulting; farvana@aol.com; Gold, Barry; The David and Lucile Packard Foundation; bgold@packard.org.
An Adaptive Environmental Assessment and Management workshop process was used to assist Grand Canyon scientists and managers in developing conceptual and simulation models for the Colorado ecosystem affected by Glen Canyon Dam. This model examines ecosystem variables and processes at multiple scales in space and time, ranging from feet and hours for benthic algal response to diurnal flow changes, to reaches and decades for sediment storage and dynamics of long-lived native fish species. Its aim is to help screen policy options ranging from changes in hourly variation in flow allowed from Glen Canyon Dam, to major structural changes for restoration of more natural temperature regimes. It appears that we can make fairly accurate predictions about some...
Tipo: Peer-Reviewed Reports Palavras-chave: Adaptive management; Aquatic primary productivity; Colorado River; Dam; Ecosystem models; Grand Canyon; Habitat restoration; Hydrology; Insect productivity; Native fishes; Riparian ecosystems; Sediment budget.
Ano: 2000
Registros recuperados: 2
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