Thermal Alteration and Macroinvertebrate Response Below a Large Northern Great Plains Reservoir
Journal of Great Lakes Research 41 Supplement 2 (2015) 155–163 Contents lists available at ScienceDirect Journal of Great Lakes Research journal homepage: www.elsevier.com/locate/jglr Thermal alteration and macroinvertebrate response below a large Northern Great Plains reservoir Iain D. Phillips a,b,⁎, Michael S. Pollock a, Michelle F. Bowman c,D.GlenMcMaster d, Douglas P. Chivers b a Water Quality and Habitat Assessment Services, Water Security Agency, 101-108 Research Drive, Saskatoon, Saskatchewan, S7N 3R3, Canada b Department of Biology, University of Saskatchewan, 112 Science Place, Saskatoon, Saskatchewan S7N 5E2, Canada c Forensecology, 70 Swift Crescent, Guelph, Ontario N1E 7J1, Canada d Water Quality and Habitat Assessment Services, Water Security Agency, 420-2365 Albert Street, Regina, Saskatchewan, S4P 4K1, Canada article info abstract Article history: Large hydroelectric dams directly alter the abiotic condition of rivers by releasing water with large differences in Received 26 June 2014 temperature relative to natural conditions. These alterations in the thermal regime along with alterations in flow Accepted 3 July 2015 often result in altered ecosystems downstream. For sustainable management of this aquatic resource, there is a Available online 23 July 2015 need to balance services a reservoir provides with ecosystem protection. Here we conduct a high-resolution study on the thermal regime and associated aquatic macroinvertebrate community downstream of a hydroelec- Communicated by Jeff Hudson tric dam on a large-order Northern Great Plains River and analyze these findings with a non-central hypothesis fi Keywords: test model, Test Site Analysis. Speci cally, we monitor the temperature regime of this tailwater environment, and Lake Diefenbaker compare the annual change in temperature downstream to reference sites unaffected by the dam.
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