1. Department of Biological Sciences University of Alabama Tuscaloosa AL U.S.A.
2. Department of Ecology Montana State University Bozeman MT U.S.A.
3. Department of Evolution, Ecology, and Organismal Biology The Aquatic Ecology Laboratory The Ohio State University Columbus OH U.S.A.
4. Department of Civil, Construction and Environmental Engineering University of Alabama Tuscaloosa AL U.S.A.
5. Institute of Life and Environmental Sciences University of Iceland Reykjavík Iceland
6. Marine and Freshwater Research Institute Reykjavík Iceland