摘要 : In 2018-2019, zooplankton was studied in the Don River (from the source to the mouth, including the Tsimlyansk Reservoir), Volga-Don Shipping Canal, and the upper section of the Taganrog Bay in the Sea of Azov. The habitats of two... 展开 In 2018-2019, zooplankton was studied in the Don River (from the source to the mouth, including the Tsimlyansk Reservoir), Volga-Don Shipping Canal, and the upper section of the Taganrog Bay in the Sea of Azov. The habitats of two Ponto-Caspian copepod species (Heterocope caspia and Eurytemora caspica) and three alien species (Mediterranean copepod Calanipeda aquaedulcis, representative of the neritic zone Acartia (Acanthacartia) tonsa, and East Asian euryhaline species Thermocyclops taihokuensis) were identified. For the first time, T. taihokuensis was recorded in the Don River upstream and downstream of the Tsimlyansk Reservoir and in water bodies of the Volga-Don Shipping Canal. It is established that the Ponto-Caspian species Eurytemora caspica inhabits the Don River basin and the Taganrog Bay in the Sea of Azov. The European copepod E. affinis previously recorded in the region was not found in the studied sections of the river basin. The Ponto-Caspian species and Calanipeda aquaedulcis featured the highest occurrence frequencies (> 80% of samples). The recent invader Thermocyclops taihokuensis featured the highest abundance (> 100 000 ind./m(3)). Using the Tsimlyansk Reservoir as an example, it is established that Ponto-Caspian and alien species could have invaded the Don River basin as a result of a large-scale introduction of planktonic and benthic invertebrates performed in the 1950s-1970s with the purpose to enhance the nutritive base of commercially valuable fish species. The paper discusses the dispersal history and population characteristics of the studied copepod species. 收起