1Department of Biology, York University, 4700 Keele Street, Toronto, Ontario M3J 1P3 Canada
2Eawag, Swiss Federal Institute of Aquatic Science and Technology, Surface Waters - Research and Management, Kastanienbaum, 6047 Switzerland
3Department of Geology, University of Maine- Farmington, 173 High Street, Farmington, Maine 04938 USA
4Chanhassen, MN 55317 USA
5Mohonk Preserve, New Paltz, NY 12561 USA
6Agrosphere (IBG-3), Forschungszentrum Julich GmbH, Julich, Germany
7Department of Hydrology and Hydrophysics, Limnological Institute, Siberian Branch of Russian Academy of Sciences, Irkutsk, Russia
8Lake Detroiters Association, Detroit Lakes, MN 56501 USA
9Norwegian Water Resources and Energy Directorate, Box 5091, Majorstuen, N-0301 Oslo Norway
10Wisconsin State Climatology Office, University of Wisconsin-Madison, Madison, Wisconsin USA
11Bayfield, WI 54814 USA
12Blue Hill Observatory Science Center, PO Box 187, Readville, MA 02137 USA
13Itasca Biological Station and Laboratories, University of Minnesota Twin Cities, 28131 University Circle, Lake Itasca, Minnesota 56470 USA
14Finnish Environment Institute SYKE, Freshwater Centre, Latokartanonkaari 11, 00790 Helsinki, Finland
15Icelandic Museum of Natural History, Suðurlandsbraut 24, 108 Reykjavík, Iceland
16Nicolaus Copernicus University in Toruń, Faculty of Earth Sciences and Spatial Management, Lwowska 1, 87-100 Toruń, Poland
17Biodiversity Division, National Institute for Environmental Studies, Onogawa 16-2, Tsukuba, Ibaraki 305-8506 Japan
18Shinshu University, Kogandori 5-2-4, Suwa, Nagano, 392-0027 Japan
19Yatsurugi Shrine, Suwa, Nagano, 392-0024 Japan
20Washburn County, County Clerk’s Office, 10 4th Avenue, PO Box 639, Shell Lake, WI 54871 USA
21Geneva Lake Environmental Agency, George Williams College, 350 Constance Blvd., Williams Bay, WI 53191 USA
22Biology Department, State University of New York at New Paltz, 1 Hawk Drive, New Paltz, NY 12561 USA
23U.S. Geological Survey, Upper Midwest Water Science Center, Madison, WI 53726 USA
24Cornell Biological Field Station, Department of Natural Resources and the Environment, Cornell University, Bridgeport, NY 13030 USA
257 Lakes Alliance, 137 Main Street, Belgrade Lakes, ME 04918 USA
26Biological Field Station, State University of New York College at Oneonta, 5838 State Hwy 80, Cooperstown, NY 13320 USA
27Dept. of Ecology and Genetics/Limnology, Uppsala University, 75236 Uppsala, Sweden
28Adirondack Watershed Institute, Paul Smith’s College, 7777 NY-30, Paul Smiths, NY 12970 USA
29Dorset Environmental Science Centre, Ontario Ministry of Environment, Conservation and Parks, 1026 Bellwood Acres Road, Dorset, Ontario P0A1E0 Canada
30Center for Limnology, University of Wisconsin-Madison, 680 North Park Street, Madison, Wisconsin 53706 USA
31Present Address: Basaltveien 39, N-1359 Eiksmarka, Norway