1. Marine Research Centre, Finnish Environment Institute, Helsinki, Finland
2. Molecular and Integrative Biosciences Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Helsinki, Finland
3. Tvärminne Zoological Station, University of Helsinki, Hanko, Finland
4. Laboratoire de Glaciologie, DGES, Université Libre de Bruxelles, Belgium
5. Unité d'Océanographie Chimique, Université de Liège, Belgium
6. Alfred Wegener Institute Helmholtz Center for Polar and Marine Research, Bremerhaven, Germany
7. Department of Environmental Sciences, University of Helsinki, Helsinki, Finland