1. Department of Biological Sciences, University of Quebec at Montreal , Montreal, QC H2X 1Y4 , Canada
2. Interuniversity Research Group in Limnology/Groupe de Recherche Interuniversitaire en Limnologie (GRIL) , Montreal, QC H2X 1Y4 , Canada
3. Département de géomatique appliquée, Université de Sherbrooke , Sherbrooke, QC J1K 2R1 , Canada
4. US Environmental Protection Agency, Office of Water , Washington, DC 20460 , USA