Siberian Federal University

Issue

Journal of Siberian Federal University. Biology. 2026 19 (1)

Authors

Tashlykova, Natalya A.; Usmanova, Larisa I.; Afonina, Ekaterina Yu.; Bazarova, Balgit B.; Butenko, Mariya N.

Contact information

Tashlykova, Natalya A.: Institute of Natural Resources, Ecology and Cryology of the Siberian Branch of Russian Academy of Sciences (Chita, Russian Federation); ; ORCID: 0000-0003-1252-3477; Usmanova, Larisa I.: Institute of Natural Resources, Ecology and Cryology of the Siberian Branch of Russian Academy of Sciences (Chita, Russian Federation); ORCID: 0000-0002-2278-3486; Afonina, Ekaterina Yu. : Institute of Natural Resources, Ecology and Cryology of the Siberian Branch of Russian Academy of Sciences (Chita, Russian Federation); ORCID: 0000-0002-4385-7747; Bazarova, Balgit B. : Institute of Natural Resources, Ecology and Cryology of the Siberian Branch of Russian Academy of Sciences (Chita, Russian Federation); ORCID: 0000-0003-2897-8943; Butenko, Mariya N.: Institute of Natural Resources, Ecology and Cryology of the Siberian Branch of Russian Academy of Sciences (Chita, Russian Federation); ORCID: 0000-0001-6847-5545

Keywords

natural-technogenic water bodies; hydrochemical composition; species diversity

Abstract

One of the currently important and promising areas of hydrobiological research is the study of the composition, quantitative parameters, and structural characteristics of organisms in natural and manmade geosystems. In the Trans-Baikal Territory, water bodies with different functional uses were examined: Lake Kenon is a cooling pond for the Chita Thermal Power Plant-1, and Lake Umykeyskoye is an evaporation pond. Hydrochemical and hydrobiological (phytoplankton, zooplankton, macrophytes) studies were carried out using standard methods in July 2019 and June 2023 (Lake Kenon) and in July 2023 (Lake Umykeyskoye). Data on the hydrochemical regime of water bodies and species diversity of plankton communities and macrophytes are presented, and environmental factors influencing the development of aquatic organisms are determined. Over the time of Lake Kenon being used as a cooler, its hydrological and hydrochemical parameters have changed. Before the launch of Chita TPP-1, the water level in the lake was determined by natural factors, but since the start of the operation of the plant, the water level has been actually regulated by the industrial facility. The original hydrocarbonate- sodium-magnesium chemical type of water has been transformed into the hydrocarbonate- sulfate- sodium-calcium-magnesium type with mineral content of no more than 1 g/L. The content of biogenic elements corresponds to the mesotrophic type of water. Ninety-one taxa of algae and cyanobacteria were identified in phytoplankton. Macrophytes were represented by 9 species and zooplankton by 56 species. Plankton diversity indices indicated the mesotrophic-eutrophic status of the lake. In Lake Umykeyskoye, the influx of wastewater considerably affected the original chemical composition of the water (chloride-sodium). In 2023, the water was characterized as chloride-hydrocarbonate-sulphate magnesium-sodium water with a total mineral content of up to 2 g/L. Concentrations of biogenic elements were high and corresponded to the boundary between the eutrophic and hypertrophic levels of the lake. Twenty taxa of algae and cyanobacteria (below the genus) were identified in phytoplankton and 12 zooplankton taxa were detected; aquatic vegetation was represented by three species. According to plankton diversity indices, the lake was classified as eutrophic. The main factors determining the development of aquatic organisms in Lake Kenon were the chemical type of water and pH; in Lake Umykeyskoye, it was the total mineral content of water

Pages

31–51

EDN

EMDWNC

Paper at repository of SibFU

https://elib.sfu-kras.ru/handle/2311/158244

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License (CC BY-NC 4.0).