Tamar estuary

Figure 6.2. (a) The effects of salinity on the sensitivity of standard additions of ammonia in laboratory mixed waters ( ) and in waters from the Tamar estuary (A) expressed as percentage of response in river water. For comparison, the salt error curves reported by Loder and Gilbert [3] are also shown (... and —, respectively), (b) Contribution of reactive index and organic absorbance to the optical blacks in the Chemlab Colorimeter. = River water-seawater mixture, o = De-ionized water-seawater mixture. Source [2]... 

Me4Pb has also been produced by incubation of inorganic lead salts [Pb(NC>3)2, PbCU, Pb(OAc)2] with biologically active sediments and waters from the Tamar Estuary, UK67. 

Bryan, G.W. and H. Uysal. 1978. Heavy metals in the burrowing bivalve Scrobicularia plana from the Tamar estuary in relation to environmental levels. Jour. Mar. Biol. Assoc. UK. 58 89-108. 

Readman et al. [70] used flame ionization capillary gas chromatography to determine polyaromatic hydrocarbons in extracts of rivers Mersey, Dee and Tamar estuary sediments. 

Bladder wrack, Fucus vesiculosus, whole Sorfjorden, Norway Tamar estuary, U.K. 

Liddicoat, M.I., D.R. Turner, and M. Whitfield. 1983. Conservative behaviour of boron in the Tamar estuary. Estuar. Coastal Shelf Sci. 17 467-472. 

Howard, A.G., Apte, S.C., Comber, S.D.W. and Morris, RJ. (1988) Biogeochemical control of the summer distribution and speciation of arsenic in the Tamar estuary. Estuarine Coastal and Shelf Science, 27(4), 427-43. 

Moffat, A.M. (1996). Ecophysiology of mysids (Crustacea peracarida) in the river Tamar estuary, Ph.D. thesis, University of Plymouth. 

Uncles, R.L., Barton, M.L., and Stephens, J.A. (1994) Seasonal variability of fine-sediment concentrations in the turbidity maximum region of the Tamar Estuary. Estuar. Coastal Shelf Sci. 38, 19-39. 

Little work has been done to compare the nature of ligands in riverine, estuarine, and coastal waters. Preston (1979) found similar selectivity coefficients for copper with humic compounds isolated from different salinity regimes of the Tamar estuary. His results are made uncertain by lack of knowledge of the molecular weights of the compounds, but it appeared that the selectivity for copper decreased with increasing salinity. The stability constant data of Mantoura et al. (1978) also show similar selectivities for copper by aquatic humic substances from river, lake, and marine waters, which would imply that little variation in selectivities should be found along an estuarine salinity gradient. 

Morris, A.W. (1986) Removal of trace metals in the very low salinity zone of the Tamar Estuary, England. The Science of the Total Environment 49, 297-304. 

Readman JW, Mantourar RFC, Rhead MM, et al. 1982. Aquatic distribution and heterotrophic degradation and polycyclic aromatic hydrocarbons in the Tamar Estuary, England, UK. Estuarine Coastal Shelf Sci 14 369-389. 

An alternative sampling approach is to deploy a submersible analyser [14,15]. Water is sucked from the exterior environment by an on-board pump in order to fill the sampling loop, with excess sample directed back to the exterior. The flow system is remotely controlled and the results can be either stored in the analyser or transmitted back to the ship via a cable. In this context, a small submersible flow injection analyser, with solid-state spectrophotometric detection, was conceived for the in situ determination of nitrate (Fig. 8.2). Its performance and versatility were assessed by results from laboratory, shipboard (North Sea IMPACT Cruise) and in situ (Tamar Estuary, UK) analysis. Excellent temporal and spatial resolutions were reported and this aspect is crucial for investigating dynamic processes in estuarine, coastal and open ocean waters. 

Watson, P.G., Prickers, P.E. Goodchild, C.M. (1985) Spatial and seasonal variations in the chemistry of sediment interstitial waters in the Tamar estuary. Estuar. Coast. Shelf Sci. 21, 105-119. 

Tamar Estuary (harbours/marinas) UK coastal water HS-SPME-GC/MS 0.19 na na na na na [48]... 

Much lower levels were measured by Guitart et al. [48] with HS-SPME-GC/MS in pre-selected potential contaminated harbors and marinas throughout Tamar Estuary in the UK. However, the highest levels (up to 0.19 xgL ) were generally associated with motor vehicle and boating activities. Road and rail bridges runoff were identified as MTBE major inputs in the lower estuary. 

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