1. Department of Geography, University of Toronto Mississauga, 3359 Mississauga Road, Mississauga, ON L5L 1C6, Canada.
2. Department of Ecology and Evolutionary Biology, University of Toronto, 25 Harbord Street, Toronto, ON M5S 3G5, Canada.
3. Department of Biology, University of Ottawa, 30 Marie-Curie Private, Ottawa, ON K1N 9B4, Canada.
4. Wetland Conservation Program, Toronto Zoo, 361A Old Finch Avenue, Toronto, ON M1B 5K7, Canada.
5. Department of Biology, Laurentian University, 935 Ramsey Lake Road, Sudbury, ON P3E 2C6, Canada.