{"title":"Content of Pigments in the Bottom Sediments in a Small Valley Channel Reservoir","authors":"L. E. Sigareva, N. A. Timofeeva, V. V. Zakonnov","doi":"10.1134/s1995082923060226","DOIUrl":null,"url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>This paper presents the first data on the content of plant pigments in the bottom sediments of the Uvod Reservoir (Volga basin, Russia), unique in its hydrological regime, which support the hypothesis of more intensive carbon accumulation in small water bodies. It is established that the average concentration of chlorophyll <i>a</i> and its transformation products at the stations is 62.6 ± 10.0 μg/g of dry sediment, 35.2 ± 4.5 mg/(m<sup>2</sup> mm) of wet sediment, and 0.73 ± 0.09 mg/g of organic matter of sediments. The ratio of organic carbon to the pigment concentration varies within 400–6000, depending on the type of bottom sediments, which significantly exceeds the values known for macrophytes and phytoplankton. Despite the features of hydrodynamics and geomorphology of the reservoir, the spatial distribution of sedimentary pigments is consistent with the structure of the bottom sediment complex, which is typical for water bodies of different types. A decrease in differences between the pigment concentrations in the sandy and silty biotopes of the Uvod Reservoir compared to the Upper Volga is noted. The average concentration of chlorophyll <i>a</i> with pheopigments (58.5 ± 6.7 μg/g of dry sediment), calculated considering the areas of bottom sediments of different types, in the Uvod Reservoir is 2.3 times higher than in the Gorky Reservoir (25.3 ± 1.5 μg/g), from which water inflows through the Volga–Uvod Canal. According to the content of sedimentary pigments, the trophic state of the reservoir is mesotrophic. Features of eutrophication in the Uvod Reservoir are more distinctly expressed than in the Gorky Reservoir.</p>","PeriodicalId":50359,"journal":{"name":"Inland Water Biology","volume":"33 1","pages":""},"PeriodicalIF":0.8000,"publicationDate":"2023-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Inland Water Biology","FirstCategoryId":"99","ListUrlMain":"https://doi.org/10.1134/s1995082923060226","RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"MARINE & FRESHWATER BIOLOGY","Score":null,"Total":0}
引用次数: 0
Abstract
This paper presents the first data on the content of plant pigments in the bottom sediments of the Uvod Reservoir (Volga basin, Russia), unique in its hydrological regime, which support the hypothesis of more intensive carbon accumulation in small water bodies. It is established that the average concentration of chlorophyll a and its transformation products at the stations is 62.6 ± 10.0 μg/g of dry sediment, 35.2 ± 4.5 mg/(m2 mm) of wet sediment, and 0.73 ± 0.09 mg/g of organic matter of sediments. The ratio of organic carbon to the pigment concentration varies within 400–6000, depending on the type of bottom sediments, which significantly exceeds the values known for macrophytes and phytoplankton. Despite the features of hydrodynamics and geomorphology of the reservoir, the spatial distribution of sedimentary pigments is consistent with the structure of the bottom sediment complex, which is typical for water bodies of different types. A decrease in differences between the pigment concentrations in the sandy and silty biotopes of the Uvod Reservoir compared to the Upper Volga is noted. The average concentration of chlorophyll a with pheopigments (58.5 ± 6.7 μg/g of dry sediment), calculated considering the areas of bottom sediments of different types, in the Uvod Reservoir is 2.3 times higher than in the Gorky Reservoir (25.3 ± 1.5 μg/g), from which water inflows through the Volga–Uvod Canal. According to the content of sedimentary pigments, the trophic state of the reservoir is mesotrophic. Features of eutrophication in the Uvod Reservoir are more distinctly expressed than in the Gorky Reservoir.
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.
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