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Microzooplankton (e.g. ciliates and rotifers) is an important ecosystem compartment responsible for the transfer and recycling of nutrients in pelagic ecosystems. In the Baltic Sea, species diversity of microzooplankton is high. The characteristic feature of the Baltic Sea planktonic fauna is that great part of it is represented by the freshwater species. In comparison with other seas, species composition of the Baltic Sea's ciliates and rotifers have been studied more completely. Now, 789 species of ciliates are known for the Baltic Sea, and only 160 of them are true planktonic. Thus, the need to define better the diversity of planktonic ciliates is essential. In particular, nanociliates ( |
