Species diversity and quantity dynamics of freeliving ciliates of Agzibir Lake
IF Mansimova, IKH Alekperov
In 2012-2016, the species diversity and dynamics of quantity and biomass of freeliving ciliates of Agzibir Lake were studied. Totally 161 species were discovered, of which 34 species were observed for the first time for Caucasus fauna. It is noted that, the greatest species diversity was observed in benthos on gray silt (78 species), then on the silt with plant residues (72 species) and further among the thickets of aquatic plants (phytociliocenosis-59 species). The minimum species diversity was observed in plankton (28 species), as well as in periphyton (24 species) and in benthos on black silt (33 species). Seasonal dynamics is characterized by a consistent change in seasonal species composition, and seasonal changes in the quantity have two maxima (in spring and autumn) and two minima (in winter and summer) in plankton and 3 maxima (in spring, summer and autumn) in benthos. The investigations showed that the role of free-living ciliates in the food chain of the reservoir is very high, and during the investigation of trophic connections in aquatic ecosystems, this group must be taken into account.