Basko, Y.V., A.M. Popova,T.B. Golokolenova, E.V. Viphlo, P.A. Krivtsova, L. Eltsova, N.V. Kuchishkina, N.V. Kutsenko & V.P. Gorelov. (2025). Hydrobiological and hydrochemical characteristics of the Volga-Don Canal reservoirs: dynamics and structural-functional features. Vestnik of Astrakhan State Technical University, Series Fishing Industry. 2025(2):7-20. [In Russian; English abstract].

512398

10.24143/2073-5529-2025-2-7-20 [view]

Basko, Y.V., A.M. Popova,T.B. Golokolenova, E.V. Viphlo, P.A. Krivtsova, L. Eltsova, N.V. Kuchishkina, N.V. Kutsenko & V.P. Gorelov

2025

2025(2):7-20. [In Russian; English abstract]

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The paper presents the results of comprehensive studies conducted in 2024 on the watershed reservoirs of the Volga-Don Shipping Canal (VDSC). The hydrochemical characteristics of these artificial water bodies are de-scribed, along with data on the main components of their food supply: phytoplankton, zooplankton, and macrozoobenthos.In 2024, water levels exceeded long-term averages under an acyclonic weather pattern. Water transparency ranged from 0.5 m (shallow areas in summer) to 3.5 m (central zones in spring). The temperature regime followed seasonal dynamics: 9.4–16.6 °C in spring, up to 33.5 °C in summer, and 8.9–14.7 °C in autumn. Electrical conductivity varied from 630 µS/cm (Karpovskoye Reservoir in autumn) to 1190 µS/cm (Varvarovskoye Reservoir in summer), reflecting spatiotemporal variations in water mineralization. The mineral composition of the VDSC watershed reservoirs is similar to that of the Upper Reach of the Tsimlyansk Reservoir, their primary water source, and corresponds to the bicarbonate-calcium type. Mineral phosphorus levels were typical of mesotrophic reservoirs. The average chlorophyll a concentration during the growing season was 10.5 µg/L, peaking in summer (34.5 µg/L in Bereslavskoye Reservoir), with ß-mesotrophic waters prevailing. Phytoplankton comprised 196 species, with average seasonal abundance and biomass of 15.831 thousand cells/L and 4.6 mg/L, respectively. Zooplankton showed low quantitative indicators (135.7 thousand ind./m³, 0.21 g/m³), peaking in summer (0.67 thousand ind./m³). Rotifers dominated in abundance, while crustaceans dominated in biomass. The benthic communities of the reservoirs were structurally similar but differed in quantitative metrics. The highest food supply was recorded in Karpovskoye Reservoir, dominated by crustaceans and mollusks. The mid-vegetative quantitative indicators of benthic fauna in the reservoirs were substantial: 9,392 specimens/m² and 835.0 g/m². The findings indicate the stability of the VDSC reservoir ecosystems, with succession processes typical of lowland water bodies.

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