1. Arndt H, Dietrich D, Auer B, Cleven E-J, Gräfenhan T, Weitere M, Mylnikov AP (2000) Functional diversity of heterotrophic flagellates in aquatic ecosystems. In: Leadbeater BSC, Green JC (eds) The flagellates. Taylor & Francis Ltd, London, pp 240–248
2. Ax P, Ax R (1969) Experimentelle Untersuchungen über die Salzgehalttoleranz von Ciliaten aus dem Brackwasser und Süsswasser. Biol Zbl 78:7–31
3. Baldock BM, Baker JH, Sleigh MA (1983) Abundance and productivity of protozoa in chalk streams. Holarct Ecol 6:238–246
4. Bark AW (1981) The temporal and spatial distribution of planktonic and benthic protozoan communities in a small productive lake. Hydrobiologia 85:239–255
5. Berninger U-G, Finlay BJ, Kuuppo-Leinikki P (1991) Protozoan control of bacterial abundances in fresh water. Limnol Oceanogr 36:139–147