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A comparison of nutrients in the interstitial water of reducing (Tamar Estuary) and oxic (Carmarthen Bay) coastal sediments
Watson, P.G.; Frickers, P.E.; Goodchild, C.M. (1985). A comparison of nutrients in the interstitial water of reducing (Tamar Estuary) and oxic (Carmarthen Bay) coastal sediments. Neth. J. Sea Res. 19(3-4): 231-239
In: Netherlands Journal of Sea Research. Netherlands Institute for Sea Research (NIOZ): Groningen; Den Burg. ISSN 0077-7579, more
Peer reviewed article  

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Keywords
    Ammonia; Bays; Estuaries; Interstitial water; Nitrates; Nitrites; Orthophosphate; Oxidation-reduction potential; Seasonal variations; Sediments; Silicates; Spatial distribution; Temporal distribution; ANE, British Isles, Bristol Channel [Marine Regions]; ANE, British Isles, England, Tamar Estuary [Marine Regions]; Brackish water

Authors  Top 
  • Watson, P.G.
  • Frickers, P.E.
  • Goodchild, C.M.

Abstract
    Temporal and spatial variations in the interstitial water concentration gradients of ammonia, orthophosphate, nitrate, nitrite, silicate and ferrous iron were determined in the anoxic silts of the Tamar Estuary, SW England and in the more oxic, sandy sediments of Carmarthen Bay in the Bristol Channel. A comparison of these results, together with determinations of sediment redox potential and particulate carbon and nitrogen, is made to describe a broader perspective than can be identified in either zone individually. The overall comparison shows: (1) a closer correlation between interstitial water components and dissolved organic carbon, (2) seasonal variability in interstitial water silicate and phosphate indicative of different source materials and of competing processes of production and control, and (3) the variable influence on interstitial water profiles of regular and periodic sediment disturbance.

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