Journal of Siberian Federal University. Biology / Sulfur and Chlorine Compounds in Water and Bottom Sediments of Meromictic Lakes of the White Sea and Barents Sea Basins

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Issue
Journal of Siberian Federal University. Biology. 2025 18 (3)
Authors
Kolpakova, Elena S.; Losyuk, Galina N.; Kokryatskaya, Natalia M.; Velyamidova, Anna V.; Vakhrameeva, Elena A.
Contact information
Kolpakova, Elena S.: N. Laverov Federal Center for Integrated Arctic Research UrB RAS Arkhangelsk, Russian Federation; ORCID: 0000-0002-8291-7191; Losyuk, Galina N. : Laverov Federal Center for Integrated Arctic Research UrB RAS Arkhangelsk, Russian Federation; ORCID: 0000-0001-6636-2344; Kokryatskaya, Natalia M. : Laverov Federal Center for Integrated Arctic Research UrB RAS Arkhangelsk, Russian Federation; ORCID: 00-0002-0619-7241; Velyamidova, Anna V.: Laverov Federal Center for Integrated Arctic Research UrB RAS Arkhangelsk, Russian Federation; ORCID: 0000-0001-6183-3397; Vakhrameeva, Elena A.: Laverov Federal Center for Integrated Arctic Research UrB RAS Arkhangelsk, Russian Federation; ORCID: 0000-0001-5129-2419
Keywords
meromictic lakes; bottom sediments; reduced sulfur; persistent organic pollutants; chlorophenolic compounds; gas chromatography
Abstract

The present paper reports data on the contents and distribution of reduced sulfur compounds and organochlorine compounds in the bottom sediments of three meromictic lakes in the European Far North of Russia. The study environments are lakes in the basins of two Arctic seas (the White Sea and the Barents Sea). Lake Trekhtzvetnoe is located in the area that is directly unaffected by human activities, Lake Bol’shie Khruslomeny is not directly affected by point source pollution, and Lake Mogilnoe is subjected to pollution from local sources. The obtained results indicate fairly high rates of bacterial reduction of sulfates and anaerobic destruction of organic matter in the bottom sediments studied. The current study shows that the considerable accumulation of reduced sulfur compounds in lake sediments is associated with the input of autochthonous organic matter available for microorganisms. The data on the composition and quantity of organochlorine compounds suggest that their presence in lake sediments is the result of the additive effect of anthropogenic factors and natural processes. The most likely origin of persistent organic pollutants in the sediments of Lakes Bol’shie Khruslomeny and Trekhtzvetnoe is regional, interregional, and transboundary transport from various sources. The presence of persistent organic pollutants in the sediments of Lake Mogilnoe may be associated with both long- range transport and input from various local anthropogenic sources in the lake catchment area. The present study demonstrates that the composition of chlorophenolic compounds in the bottom sediments of the study lakes that are not directly affected by human activities is mainly determined by natural sources. The specific conditions that have developed in the ecosystems of the meromictic lakes suggest insufficient efficiency of the processes of biodegradation of chlorophenolic compounds in water and bottom sediments, contributing to their accumulation

Pages
285–302
EDN
PLSDZK
Paper at repository of SibFU
https://elib.sfu-kras.ru/handle/2311/157486

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