Abundance, Distribution, and Mortality of Hydrobionts in the Section of the Gorky Reservoir Affected by Heated Waters of the Kostroma Hydroelectric Power Plant

IF 0.8 4区生物学 Q4 MARINE & FRESHWATER BIOLOGY

Inland Water Biology Pub Date : 2023-12-19 DOI:10.1134/s1995082923060093

Yu. V. Gerasimov, S. E. Bolotov, A. I. Tsvetkov, E. S. Borisenko

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Abstract

This study has been conducted in the river section of the Gorky Reservoir in the zone affected by the heated water discharge from the Kostroma hydroelectric power plant during the growing season (May–November) of 2021. The reduced species richness is observed in the sites of the maximum water heating, which, however, quickly return to the initial values in the downstream section of the river. The lethal effect of warm waters on zooplankton is mainly manifested in the summer, when the natural warming of the river waters is influenced by the heated water discharge from the Kostroma hydroelectric power plant. In autumn, the warming effect of heated waters, on the contrary, promotes the better survival of organisms. Fish reach a high abundance in the study area by the end of summer, when the juvenile leave shallow waters. In the autumn period, the fish redistribution and a significant increase in the abundance occur in the area of heated waters compared to the background sites. The results indicate the absence of an environmentally significant lethal effect. Local plankton losses are quickly compensated for due to high reproduction rates and the short-cycle development of invertebrates. No lethal effect of the exposure to high temperatures on fish was found.

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受科斯特罗马水电站加热水流影响的高尔基水库河段水生生物的数量、分布和死亡率

摘要本研究于 2021 年生长季节（5 月至 11 月）在科斯特罗马水电站加热水排放影响区内的高尔基水库河段进行。在水温最高的地方，物种丰富度降低，但在下游河段，物种丰富度很快恢复到初始值。暖水对浮游动物的致命影响主要体现在夏季，此时河水的自然变暖会受到科斯特罗马水电站排出的加热水的影响。而在秋季，加热水体的增温效果反而会促进生物更好地生存。到夏末，研究区域的鱼类达到高丰度，此时幼鱼离开浅水区。到了秋季，加热水域区域的鱼类重新分布，且数量较背景区域显著增加。结果表明，不存在对环境有重大杀伤力的影响。由于无脊椎动物的高繁殖率和短周期发育，当地浮游生物的损失很快就得到了补偿。高温对鱼类没有致命影响。

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来源期刊

Inland Water Biology 生物-海洋与淡水生物学

CiteScore

1.30

自引率

55.60%

发文量

审稿时长

6-12 weeks

期刊介绍： Inland Water Biology publishes thematic reviews and original papers devoted to flora and fauna in waterbodies, biodiversity of hydrobionts, biology, morphology, systematics, ecology, ethology, ecological physiology and biochemistry of aquatic organisms, patterns of biological cycle, structure and functioning of aquatic ecosystems, anthropogenic and uncontrolled natural impacts on aquatic organisms and ecosystems, invasion of nonindigenous species into ecosystems and their ecology, methods of hydrobiological and ichthyological studies.