The effects of wind, phytoplankton and density discontinuities upon ammonia distributions in Liverpool Bay

P. Foster, J. Beardall, D. Voltolina, G. Savidge

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Spatial and temporal changes in distributions of ammonia and of physical and biological characteristics observed in Liverpool Bay during a seasonal production cycle are presented. Ammonia concentrations did not conform to the well defined seasonal trend in levels of silicate and nitrate, this leading to a temporal variability in the relative contributions of nitrate and ammonia to the total inorganic nitrogen pool. It is shown that the gross changes in ammonia concentrations and distributions in Liverpool Bay may be related to the effects of three predominant factors, namely the effect of wind upon the surface residual circulation during winter, the development of the phytoplankton bloom during spring and the presence or absence of a marked discontinuity.

Original languageEnglish
Pages (from-to)463-475
Number of pages13
JournalEstuarine, Coastal and Shelf Science
Issue number4
Publication statusPublished - 1 Jan 1985


  • ammonia
  • density discontinuities
  • phytoplankton
  • wind

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