1. Cold Regions Research Centre, Wilfrid Laurier University, Waterloo, ON N2L 3E5, Canada.
2. Environment and Climate Change Canada, Canada Centre for Inland Waters, Burlington, ON L7S 1A1, Canada.
3. Environment and Climate Change Canada, University of Victoria, Victoria, BC V8W 2Y2, Canada.
4. Environment and Climate Change Canada, Department of Biology, University of New Brunswick, Fredericton, NB E3B 5A3, Canada.
5. Environment and Climate Change Canada, National Hydrology Research Centre, Saskatoon, SK S7N 3H5, Canada.
6. Environment and Climate Change Canada, Yellowknife, NT X1A 2P7, Canada.