The vertical distribution of planktonic ciliates in the small meromictic pond in summer

The research data of the vertical distribution of planktonic ciliates in the small meromictic eutrophic pond Nizniy (Samara Botanic Garden) in the summer 2004 year were represented here. The specific, taxonomic, and trophic structures changes in relation to depth and time were discussed. The peculiarities of the abundances and biomass maximum of ciliates in relation to the maximum of the other hydrobionts (rotatoria, cyanobacteria, green and purple sulfur bacteria) were considered.