In northern Poland, large-bodied
zooplankton such as D. magna
could control the density of all the
phytoplankton size classes in comparison
with small-bodied zooplankton (mainly D.
galeata, D. cucullata and Bosmina spp.)
that was able to control the density of small
algae (< 50μm) (Dawidowicz, 1990).
Generally large zooplankton species such as
large Daphnia affect phytoplankton
population more than small species such as
rotifers (Vanni, 1987 and Moss et al., 1997).