1. Department of Botany, Institute of Biological Sciences, University of Rostock, Wismarsche Str. 44/45, Rostock, 18051, Germany
2. Physical Geography, Institute for Geography and Geology, University of Greifswald, Greifswald, Friedrich-Ludwig-Jahn Str. 16, Greifswald, 17487, Germany
3. Laboratoire de paléoécologie aquatique (LPA), Département de géographie, Université Laval, Québec (QC), G1V 0A6, Canada
4. Medical Biology and Electron Microscopy Centre, Rostock University Medical Center, Strempelstraße 14, Rostock, 18057, Germany