1. UK Centre for Ecology & Hydrology, Penicuik, United Kingdom
2. Biological and Environmental Sciences, University of Stirling, Stirling, United Kingdom
3. Finnish Environment Institute, Helsinki, Finland
4. Hellenic Centre for Marine Research, Institute of Marine Biological Resources and Inland Waters, Anavissos Attikis, Greece
5. Center for Hydrology and Informatics, National Technical University of Athens, Athina, Greece
6. Marine Scotland, Marine Laboratory, Aberdeen, United Kingdom
7. Faculty of Biology, Aquatic Ecology, University of Duisburg-Essen, Essen, Germany
8. Centre for Water and Environmental Research, University of Duisburg-Essen, Essen, Germany