1. Everglades National Park, c/o A.R.M. Loxahatchee National Wildlife Refuge, 10218 Lee Road, Boynton Beach, Florida 33473 USA
2. National Water-Quality Assessment Program, US Geological Survey, 12201 Sunrise Valley Drive MS 413, Reston, Virginia 20192 USA
3. Center for Ecological Sciences, Tetra Tech, 400 Red Brook Blvd., Suite 200, Owings Mills, Maryland 21117 USA
4. Department of Biological Sciences, Lake Superior State University, 650 W. Easterday Avenue, Sault Ste. Marie, Michigan 49783 USA