1. Department of Physical and Environmental Sciences, University of Toronto Scarborough, 1265 Military Trail, Scarborough, OntarioM1C 1A4, Canada
2. USDA Forest Service Northern Research Station, Grand Rapids, Minnesota55744, United States
3. Department of Plant and Earth Science, University of Wisconsin − River Falls, 410 S. 3rd Street, River Falls, Wisconsin54022, United States
4. St. Croix Watershed Research Station, Science Museum of Minnesota, 16910 152nd Street N., Marine on St. Croix, Minnesota55047, United States
5. Department of Chemistry, Gustavus Adolphus College, 800 W College AvenueSt. Peter, Minnesota56082, United States
6. Department of Fisheries, Wildlife, and Conservation Biology, University of Minnesota, St. Paul, Minnesota55108, United States
7. Minnesota Pollution Control Agency, 520 Lafayette Road North, Saint Paul, Minnesota55155, United States
8. Department of Biology, The University of Western Ontario, London, OntarioN5B 2A7, Canada
9. Metropolitan Council Environmental Services, 2400 Childs Road, Saint Paul, Minnesota55106, United States
10. Department of Soil, Water, and Climate, University of Minnesota, St. Paul, Minnesota55108, United States