Sulphate reduction in oxic and sub-oxic North-East Atlantic sediments

N. S. Battersby, S. J. Malcolm, C. M. Brown, S. O. Stanley

    Research output: Contribution to journalArticle

    Abstract

    Oxic and sub-oxic N.-E. Atlantic sediments were examined for sulphate-reducing activity. Oxygen and/or nitrate reduction are probably the dominant mineralisation processes in the abyssal plain sediment studied. A low rate of sulphate reduction (0.1 nmol SO2-4 /ml/day) was recorded in the surface 5 cm of the continental slope sediment, together with the presence of a range of sulphate-reducing bacteria (SRB). A higher activity of sulphate reduction (2.2 nmol SO2-4 /ml/day) occurred in the continental shelf sediment which led to a small decrease in pore water sulphate and an increase in titration alkalinity. This sediment contained approx. 102-103 acetate, lactate and propionate oxidising SRB/ml. No low-Mr organic acids were detected in these sediments. However, amendment with 75 µM acetate stimulated sulphate-reducing activity in the shelf sediment. © 1985.

    Original languageEnglish
    Pages (from-to)225-228
    Number of pages4
    JournalFEMS Microbiology Letters
    Volume31
    Issue number4
    Publication statusPublished - Aug 1985

    Keywords

    • low-M r organic acids
    • Malin Shelf
    • Porcupine Abyssal Plain
    • Rockall Trough
    • sulphate-reducing bacteria
    • titration alkalinity

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    Battersby, N. S., Malcolm, S. J., Brown, C. M., & Stanley, S. O. (1985). Sulphate reduction in oxic and sub-oxic North-East Atlantic sediments. FEMS Microbiology Letters, 31(4), 225-228.