Fauna and homogenization effects of zooplankton species composition mouth area of small tributary of a flatland reservoir in abnormally hot period

The research results of zooplankton fauna of the water system of small tributary, his mouth area and reservoirs, as well as an assessment of changes in the species composition of zooplankton in the mouth area inflow in the conditions of climatic anomalies. It is shown that in the mouth area of the inflow, compared with adjacent portions of rivers and reservoirs, an increase in taxonomic richness, systematic diversity and taxonomic complexity of zooplankton. Under the influence of thermal anomalies weather disrupted background structure similarity of zooplankton species composition of hydroecological zones of mouth area, disrupted them faunal specificity and observed biotic homogenization of zooplankton fauna.