1. Alfred‐Wegener‐Institute, Helmholtz‐Center for Polar and Marine Research Am Handelshafen 12 Bremerhaven 27570 Germany
2. Centre for Environmental and Molecular Algal Research (CEMAR) Department of Biology University of New Brunswick PO Box 4400 Fredericton New Brunswick E3A 5A3 Canada
3. Institute for Plant Science and Microbiology University of Hamburg Ohnhorst Str. 18 Hamburg 22609 Germany
4. Department of Biosciences University of Oslo PO Box 1066 Blindern Oslo 0316 Norway