1. Center Algatech; Institute of Microbiology CAS; Třeboň 37981 Czech Republic
2. Faculty of Science; University of South Bohemia; Branišovská 31 České Budějovice 370 05 Czech Republic
3. Biology Center CAS, Institute of Hydrobiology; Na Sádkách 702/7 České Budějovice 370 05 Czech Republic
4. Experimental Limnology; Leibniz Institute of Freshwater Ecology and Inland Fisheries (IGB); Stechlin 16775 Germany
5. Inst for Biochemistry and Biology; Potsdam University; 14469 Potsdam, Maulbeerallee 2 Germany