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Seasonal dynamics of the sulphate reduction rate on the north-western Black Sea shelf
Lein, A.; Pimenov, N.; Guillou, C.; Martin, J.-M.; Lancelot, C.; Rusanov, I.; Yusupov, S.; Miller, Y.; Ivanov, M. (2002). Seasonal dynamics of the sulphate reduction rate on the north-western Black Sea shelf. Est., Coast. and Shelf Sci. 54(3): 385-401. https://dx.doi.org/10.1006/ecss.2000.0654
In: Estuarine, Coastal and Shelf Science. Academic Press: London; New York. ISSN 0272-7714; e-ISSN 1096-0015
Also appears in:
(2002). European River Ocean Systems (EROS-21): interactions between the Danube and the north-western Black Sea. Estuarine, Coastal and Shelf Science, 54(3). Academic Press: London. 279-641 pp., more
Peer reviewed article  

Available in  Authors 

Keywords
    Chemical reactions > Reduction > Sulphate reduction
    Isotopes > Carbon isotopes
    Isotopes > Sulphur isotopes
    Sediments
    Black Sea Plate [Marine Regions]
Author keywords
    sulphate reduction; sulphur isotopes; carbon isotopes; sediments; Black Sea

Authors  Top 
  • Lein, A., correspondent
  • Pimenov, N.
  • Guillou, C.
  • Martin, J.-M.
  • Lancelot, C., more
  • Rusanov, I.
  • Yusupov, S.
  • Miller, Y.
  • Ivanov, M.

Abstract
    The microbial sulphate reduction rate (SRR) in the surface layer (0-30 cm) of shallow water sediments of the north-western Black Sea shelf has been measured using the 35S radioisotopic technique. It was shown that SRR is accompanied by changes of salt composition of porewaters and isotopic (d34S) composition of sulphate. The hydrogen sulphide-derived minerals are formed in the solid phase of sediments. An expected exponential dependence of the isotopic composition of reduced sulphur compounds on the SRR was observed. In near-shore sediments, terrestrial organic carbon (d13C = - 26) as well as marine phytoplankton organic carbon (d13C = - 22) are associated with the SR processes. In August 1995 and May 1997-1998, anoxic conditions in near-bottom waters of coastal areas were not detected. The average value of H2S production in nearshore sediments varied from 3·62 mmol S m-2 day-1 in spring to 8·89 mmol S m-2 day-1 in summer 1995; these fluxes were twice as high as those measured in spring 1997 and 1998.

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