1. MTA-PE Limnoecology Research Group, Hungarian Academy of Sciences, Egyetem str. 10, H-8200 Veszprém, Hungary
2. Department of Limnology, University of Pannonia, Egyetem str. 10, H-8200 Veszprém, Hungary
3. Department of Ecology and Genetics/Limnology, Uppsala University, Norbyvägen 18D, 75236 Uppsala, Sweden