1. Department of Biological Sciences, University of Alberta, Edmonton, Alberta T6G 2E9, Canada
2. Upper Midwest Water Science Center, Mercury Research Laboratory, United States Geological Survey, Middleton, Wisconsin 53562, United States
3. Woods Hole Research Center, Woods Hole, Massachusetts 02540, United States
4. Marine Science Institute, University of Texas at Austin, Port Aransas, Texas 78373, United States
5. Department of Earth, Ocean, and Atmospheric Science, Florida State University, Tallahassee, Florida 32306, United States
6. Institute for the Study of Earth, Oceans, and Space, University of New Hampshire, Durham, New Hampshire 03824, United States
7. South Russia Centre for Preparation and Implementation of International Projects, Rostov-on-Don 344090, Russia
8. Northeast Science Station, Far Eastern Branch of Russian Academy of Science, Chersky 690041, Russia
9. Yukon River Inter-Tribal Watershed Council, Anchorage, Alaska 99501, United States
10. Les Kutny Consultant, Inuvik, Northwest Territories X0E 0T0, Canada
11. Western Arctic Research Centre, Inuvik, Northwest Territories X0E 0T0, Canada