Institution: | Department of Systems Ecology and Center for Marine Research, Stockholm University S-106 91, Stockholm, Sweden
Cornell University Biological Field Station, Department of Natural Resources 900 Shackelton Point Road, Bridgeport, NY 130309750, U.S.A
Center for Limnology, University of Wisconsin Madison, WI 53706, U.S.A
National Board of Waters and the Environment PO Box 250, SF-00101 Helsinki, Finland
National Biological Service, Upper Mississippi Science Center 2630 Fanta Reed Road, Post Office Box 818, LaCross, WI 54601-0818, U.S.A |