Abstract
The sulphate content of an intertidal sediment at Anglesey (UK) was shown to vary during the year, the sulphate-reducing activity of the microbial population being limited by low temperature during winter, and by the low numbers of sulphate-reducing bacteria during May, 1969. A corresponding annual variation of the sedimentary sulphide could not be demonstrated, and the sulphide which was formed biologically during the course of the year was almost entirely lost from the sediment. This loss of sulphide was probably due to subsurface oxidation; and flushing, by water entering at the base of the sediment. It is suggested that sulphide was only precipitated within the sediment during summer when sulphate reduction was active, and even then only during part of the tidal cycle when flushing did not occur.
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Communicated by G. F. Humphrey, Cronulla
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Nedwell, D.B., Floodgate, G.D. The effect of microbial activity upon the sedimentary sulphur cycle. Marine Biology 16, 192–200 (1972). https://doi.org/10.1007/BF00346941
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DOI: https://doi.org/10.1007/BF00346941