Toxicity of Bottom Sediments of the Rybinsk Reservoir According to Long-term Biotesting Data: Report 1. Toxicological Studies

Long-term data on changes in the toxicity of water elutriate and whole bottom sediments of the Rybinsk Reservoir are presented. Despite the high variability of the toxicological characteristics of bottom sediments, the average data of the bioassay results indicate their stability. The toxicity of bo...

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Bibliographic Details
Published in:Inland water biology 2021-11, Vol.14 (6), p.777-787
Main Authors: Tomilina, I. I., Lozhkina, R. A., Gapeeva, M. V.
Format: Article
Language:English
Subjects:
Aquatic Toxicology
Bio-assays
Bioassays
Biodiversity
Biomedical and Life Sciences
Biotesting
Body length
Bottom sediments
Chemical composition
Fertility
Freshwater & Marine Ecology
Geoecology/Natural Processes
Larvae
Life Sciences
Pollutants
Reservoirs
Sediment pollution
Sediments
Stability
Toxicity
Toxicity testing
Water pollution
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Summary:Long-term data on changes in the toxicity of water elutriate and whole bottom sediments of the Rybinsk Reservoir are presented. Despite the high variability of the toxicological characteristics of bottom sediments, the average data of the bioassay results indicate their stability. The toxicity of bottom sediments is heterogeneous: the highest toxicity is confined to vicinities of settlements and to the sampling stations located in the zone of the Cherepovets industrial complex. For the Sheksninsky Reach, a decrease in the toxicity index is noted as assessed by the fertility indicator in cladoceran Ceriodaphnia dubia and changes in the body length of Chironomus riparius larvae. The dependence between the toxicity parameters and the chemical composition of the bottom sediments is analyzed. Significant correlations between the mortality and changes in the body length of chironomid larvae on the physical and chemical characteristics of the sediments and the content of pollutants in the sediments are revealed.
ISSN:1995-0829
1995-0837
DOI:10.1134/S1995082921060134