Microbial processes in the Kanda Bay,a meromictic water body artifically separated from the White Sea |
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Authors: | A S Savvichev N A Demidenko E D Krasnova O V Kalmatskaya A N Kharcheva M V Ivanov |
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Institution: | 1.Institute of Microbiology,Academy of Sciences,Moscow,Russia;2.State Oceanographic Institute,Moscow,Russia;3.White Sea Biological Station, Department of Biology,Moscow State University,Moscow,Russia;4.Moscow State University,Moscow,Russia |
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Abstract: | Sings of meromixis are found by means of microbiological and biogeochemical investigations in the southernn part of the Kanda Bay, an artificial water body separated front the White Sea with a railway dam. The concentration of oxygen in the bottom layer attained 1.9 mmol/L, intensity of the process of microbial sulfate reduction, 3.0 μmol of sulfur/(L day). The concentration of dissolved methane, 3.7 μmol/L. Isotopic composition of carbon in methane (δ13C (CH4) =–79.2‰) indicates to its microbial genesis. At present, Kanda Bay is a sole in Russia man-made marine water body for which there are data on the rate of microbial processes responsible for formation of bottom water layer containing hydrogen sulfide and methane. |
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