Flow Management for Hydropower Extirpates Aquatic Insects, Undermining River Food Webs Public Deposited

http://ir.library.oregonstate.edu/concern/articles/p2676x176

Published by Oxford University Press on behalf of American Institute of Biological Sciences 2016. This work is written by (a) US Government employee(s) and is in the public domain in the US. The published article can be found at:  http://bioscience.oxfordjournals.org/content/66/7/561

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  • Dams impound the majority of rivers and provide important societal benefits, especially daily water releases that enable on-peak hydroelectricity generation. Such “hydropeaking” is common worldwide, but its downstream impacts remain unclear. We evaluated the response of aquatic insects, a cornerstone of river food webs, to hydropeaking using a life history–hydrodynamic model. Our model predicts that aquatic-insect abundance will depend on a basic life-history trait—adult egg-laying behavior—such that open-water layers will be unaffected by hydropeaking, whereas ecologically important and widespread river-edge layers, such as mayflies, will be extirpated. These predictions are supported by a more-than-2500-sample, citizen-science data set of aquatic insects from the Colorado River in the Grand Canyon and by a survey of insect diversity and hydropeaking intensity across dammed rivers of the Western United States. Our study reveals a hydropeaking-related life history bottleneck that precludes viable populations of many aquatic insects from inhabiting regulated rivers.
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  • Kennedy, T. A., Muehlbauer, J. D., Yackulic, C. B., Lytle, D. A., Miller, S. W., Dibble, K. L., ... & Baxter, C. V. (2016). Flow Management for Hydropower Extirpates Aquatic Insects, Undermining River Food Webs. BioScience, 66(7), 561-575. doi:10.1093/biosci/biw059
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  • description.provenance : Submitted by Open Access (openaccess@library.oregonstate.edu) on 2016-08-24T14:29:40Z No. of bitstreams: 2 KennedyFlowManagementHydropower.pdf: 2168636 bytes, checksum: 27d3f35a2a6f1032a8656b246044eeb6 (MD5) KennedyFlowManagementHydropowerSupplement.pdf: 342737 bytes, checksum: be882a1f0ef5d0aa68688f8c64fa8441 (MD5)
  • description.provenance : Made available in DSpace on 2016-08-24T14:37:17Z (GMT). No. of bitstreams: 3 krauserp335256240.zip: 2134985 bytes, checksum: ae480030af1495b8524b5464d980090c (MD5) KennedyFlowManagementHydropower.pdf: 2168636 bytes, checksum: 27d3f35a2a6f1032a8656b246044eeb6 (MD5) KennedyFlowManagementHydropowerSupplement.pdf: 342737 bytes, checksum: be882a1f0ef5d0aa68688f8c64fa8441 (MD5) Previous issue date: 2016-07
  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2016-08-24T14:37:17Z (GMT) No. of bitstreams: 3 krauserp335256240.zip: 2134985 bytes, checksum: ae480030af1495b8524b5464d980090c (MD5) KennedyFlowManagementHydropower.pdf: 2168636 bytes, checksum: 27d3f35a2a6f1032a8656b246044eeb6 (MD5) KennedyFlowManagementHydropowerSupplement.pdf: 342737 bytes, checksum: be882a1f0ef5d0aa68688f8c64fa8441 (MD5)

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