1. Coastal & Marine Management Group, Leibniz-Institute for Baltic Sea Research, Seestrasse 15, D-18119 Rostock, Germany
2. Marine Research Institute, Klaipeda University, Universiteto Ave. 17, LT-92294 Klaipeda, Lithuania
3. Department of Waste and Resource Management, Rostock University, Justus-von-Liebig-Weg 6, D-18059 Rostock, Germany
4. Department of Physical Oceanography and Instrumentation, Leibniz-Institute for Baltic Sea Research, Seestrasse 15, D-18119 Rostock, Germany