1. Western University and Canadian Rivers Institute, Department of Geography, 1151 Richmond St., London, ON N6A 5C2, Canada.
2. Environment Canada and Climate Change, National Hydrologic Research Centre, 11 Innovation Blvd., Saskatoon, SK S7N 3H5, Canada.
3. Environment Canada and Climate Change and Canadian Rivers Institute, Department of Biology, University of New Brunswick, 10 Bailey Drive, Fredericton, NB E3B 6E1, Canada.
4. Cawthron Institute, 98 Halifax St. E., The Wood, Nelson 7010, New Zealand.
5. Environment Canada and Climate Change, Canada Centre for Inland Waters, 867 Lakeshore Rd., P.O. Box 5050, Burlington, ON L7R 4A6, Canada.