I am a professor of biological sciences, a Canada Research Council Chair in Aquatic Ecosystems, and my laboratory is situated in the new Water and Environmental Science building at the University of Lethbridge, where I have been since 2003. Before that I was professor of Biology at McGill University, Montreal, where I went after graduating from the University of Calgary (Ph.D, 1983).
My research has made a significant contribution to the development of isotopic tracer approaches to modeling energy flow in aquatic food webs based on fractionation and kinetics of isotopes that cycle through ecosystems. This has provided fresh insights and technical inroads into important ecological problems such as the biomagnification of persistent contaminants (e.g. mercury, PCBs, radionuclides), impacts of heavy metals and mining practices, sewage disoposal, and other pressing environmental issues. Most recently I have been applying these approaches to the conservation of native salmonids, where I have been examining their bioenergetics, life-history and spatial ecology within the Oldman River system.
I am an Associate Editor for the Journal of Animal Ecology, and have also served on the editorial board of Water Air and Soil Pollution. I am a member of the Canadian Society of Zoologists and serve as the chair of the Ecology, Evolution and Ethology section of the society. I am also a regular contributor to the Canadian Conference for Fisheries Research (CCFFR) and the Canadian Society of Limnologists (CSL), and in 2001 I was chosen to be the Millenial Stevenson Lecturer by the CCFFR.
I teach basic ecology, (Biology 2200, Principles of Ecology), Aquatic Ecosystems (Biology 3800), and Biology of Freshwater Organisms (Biology 3850), and I supervise graduate students in M.Sc and Ph.D programs.
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