1. Norwegian Water Resources & Energy Directorate Oslo Norway
2. Natural History Museum University of Oslo Oslo Norway
3. Finnish Environment Institute Freshwater Centre Oulu Finland
4. Norwegian Institute for Water Research Oslo Norway
5. Freshwater Biological Section University of Copenhagen Copenhagen Denmark
6. water@leeds:ecology School of Geography University of Leeds Leeds UK
7. Department of Aquatic Sciences and Assessment Swedish University of Agricultural Sciences Uppsala Sweden
8. Canadian Rivers Institute and Department of Biology University of New Brunswick Fredericton NB Canada
9. Ministry of the Environment Helsinki Finland