Diurnal dynamics of vertical distribution of zooplankton in the hypertrophic lake during summer thermal stratification

Karpeschuk Ekaterina Vasilyevna

The diurnal dynamics of vertical distribution of pelagic zooplankton has been examined in hypertrophic lake during summer thermal stratification. Vertical reorganizations of the zooplankton complex in the lake Malyi Terenkul happens due to migrations of the copepods and rotifers. We have elicited differences from scientific literature data in the pattern of zooplankton migrations. The causes of these differences are features of ecological conditions: low transparency, intensive development of phytoplankton, high concentration of detritus, anoxic conditions in the thermocline and hypolimnion.

Keywords:zooplankton, vertical distribution, hypertrophic waterbody, migrations