1. Systematic Botany; University of Zurich; Zollikerstrasse 107 CH-8008 Zurich Switzerland
2. Biodiversity, Macroecology & Conservation Biogeography Group; Faculty of Forest Sciences and Forest Ecology; Georg-August-University Göttingen; Büsgenweg 2 D-37077 Göttingen Germany
3. Institute of Evolutionary Biology and Environmental Studies; University of Zurich; Winterthurerstrasse 190 CH-8057 Zurich Switzerland
4. Department of Experimental Phycology and Culture Collection of Algae (SAG); Albrecht-von-Haller-Institute for Plant Sciences; Georg-August-University Göttingen; Nikolausberger Weg 18 D-37073 Göttingen Germany
5. Institute of Applied Genetics and Cell Biology (IAGZ); University of Natural Resources and Life Sciences (BOKU); Muthgasse 18 A-1190 Vienna Austria