1. Institute for Landuse, University of Rostock, Justus-von-Liebig-Weg 6, 18059 Rostock, Germany
2. Institute for Management of Rural Areas, University of Rostock, Justus-von-Liebig-Weg 6, 18059 Rostock, Germany
3. Institute for Aquatic Ecology, University of Rostock, Albert-Einstein-Straße 3, 18051 Rostock