1. Escuela de Biología, Universidad de Costa Rica San José 11501 Costa Rica
2. Department of Experimental Limnology Leibniz‐Institute of Freshwater Ecology and Inland Fisheries, Alte Fischerhuette 2 Stechlin D‐16775 Germany
3. GFZ German Research Centre for Geosciences Helmholtz Centre Potsdam, Section 3.7 Geomicrobiology, Telegrafenberg C‐422 Potsdam 14473 Germany
4. University of Goettingen Experimental Phycology and Culture Collection of Algae (EPSAG), Nikolausberger Weg 18 Goettingen 37073 Germany
5. Shirshov Institute of Oceanology Moscow 117997 Russia
6. Institute of Physics National Academy of Sciences of Kyrgyz Republic, Chui Avenue, 265‐a Bishkek 720071 Kyrgyzstan
7. Department of Ecohydrology Leibniz‐Institute of Freshwater Ecology and Inland Fisheries, Müggelseedamm 310 Berlin D‐12587 Germany
8. Institute for Biochemistry and Biology, Potsdam University, Maulbeerallee 2 Potsdam 14469 Germany