Publications

Scientific publications

Н.И. Пальшин, Г.Э. Здоровеннова, Т.В. Ефремова, Р.Э. Здоровеннов, Г.Г. Гавриленко, С.Р. Богданов, С.Ю. Волков, А.Ю. Тержевик.
Поглощение растворенного кислорода верхним слоем донных отложений в малом озере в конце периода ледостава
N.I. Palshin, G.E. Zdorovennova, T.V. Efremova, R.E. Zdorovennov, G.G. Gavrilenko, S.R. Bogdanov, S.Yu. Volkov, A.Yu. Terzhevik. Absorption of dissolved oxygen by the upper layer of bottom sediments in a small lake during late winter // Transactions of Karelian Research Centre of Russian Academy of Science. No 3. Limnology. 2017. Pp. 36-47
Keywords:
dissolved oxygen; bottom sediments; absorption of dissolved oxygen; shallow lake; ice-covered period
The results of measurements of dissolved oxygen in the vicinity of the water-sediment interface in a small mesotrophic Lake Vendyurskoe (Southern Karelia) at the end of the ice-covered period are reported. The measurements were carried out in April 2008 on 18 slope sites (depths from 2.5 m to 9.3 m), with a predominance of water-saturated silt. The content of dissolved oxygen decreased sharply at the contact with silt. The maximum oxygen gradient reached 9 (mgO2/l)/cm on the silt surface . The rate of oxygen consumption by the sediment was maximal at a depth of 6-8 m. This rate was 1.5 times lower in shallower and deeper areas. The amount of dissolved oxygen absorption by sediments was estimated based on the lake’s bathymetric curve. A comparison of our estimates with the measured dissolved oxygen content in the water column suggests that over 60 % of oxygen reduction is the result of absorption by silt and less than 40 % is due to the destruction of labile organic matter in the water column at the stage of winter stagnation.
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Last modified: April 4, 2017