1. Universität Konstanz, Mathematisch‐Naturwissenschaftliche Sektion, Fachbereich Biologie, D78457 Konstanz, Germany
2. Faculty of Science and Institute of Physical Biology, University of South Bohemia, Branišovská 31, CZ‐370 05 České Budějovice, Czech Republic
3. Department of Autotrophic Microorganisms, Institute of Microbiology, Academy of Sciences of the Czech Republic, Opatovický Mlýn, CZ‐37981 Třeboň, Czech Republic
4. Biology Centre AS CR, v. v. i. Institute of Soil Biology and Faculty of Science, University of South Bohemia, Na Sadkach 7, CZ‐37005 České Budějovice, Czech Republic