Nutrient Distributions In An Estuary - Evidence Of Chemical Precipitation Of Dissolved Silicate And Phosphate

Morris, AW, Bale, AJ and Howland, RJM 1981 Nutrient Distributions In An Estuary - Evidence Of Chemical Precipitation Of Dissolved Silicate And Phosphate. Estuarine, Coastal and Shelf Science, 12 (2). 205 - 216. https://doi.org/10.1016/S0302-3524(81)80097-7

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Abstract/Summary

Continuous autoanalytical recordings of the axial distributions of dissolved nitrate, silicate and phosphate in the influent freshwater and saline waters of the Tamar Estuary, south-west England have been obtained. Short-term variability in the distributions was assessed by repetitive profiling at approximately 3-h intervals on a single day and seasonal comparisons were obtained from ten surveys carried out between June 1977 and August 1978. Whereas nitrate is always essentially conserved throughout the upper estuary, the silicate- and phosphate-salinity relationships consistently indicate a non-biological removal of these nutrients within the low (0–10%) salinity range. Attempts to quantify precisely the degree of removal and to correlate this with changes in environmental properties (pH, turbidity, chlorophyll fluorescence, salinity, freshwater composition) were mainly inconclusive due to short-term fluctuations in the riverine concentrations of silicate and phosphate advected into the reactive region and to the rapid changes in turbidity brought about by tidally-induced resuspension and deposition of bottom sediment.

Item Type:	Publication - Article
Additional Keywords:	nutrients; nitrate; phosphate; silicate; estuaries; chemical interactions; England coast
Subjects:	Chemistry Marine Sciences
Divisions:	Plymouth Marine Laboratory > Other (PML)
Depositing User:	EPrints Services
Date made live:	11 Feb 2014 15:54
Last Modified:	06 Jun 2017 16:03
URI:	https://plymsea.ac.uk/id/eprint/2757

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