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Hydrographic and nutrient chemistry surveys in the western English channel during 1963 and 1964

Published online by Cambridge University Press:  11 May 2009

F. A. J. Armstrong ,
E. I. Butler  and
G. T. Boalch
F. A. J. Armstrong
Affiliation:
The Plymouth Laboratory
E. I. Butler
Affiliation:
The Plymouth Laboratory
G. T. Boalch
Affiliation:
The Plymouth Laboratory
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Extract

Three surveys were made in 1963 and five in 1964 in the area of the English Channel between the English and French coasts and between 3° 40' W and 5°10' W. This area had been surveyed in 1961 and 1962. Temperature and salinity were determined at o, to and 50 m and phosphate silicate and nitrate at 10 and 50 m. The results are presented graphically. Temperature and salinity were compared with Lumby's 25–year averages. The year 1963 started with unusually low temperatures and salinities higher than average. Temperature remained low in the spring, but salinity decreased. The year 1964 started with temperatures and salinities above normal, but during the rest of the year values were close to average. Nitrate in January 1964 was higher than in January 1963. Analyses of suspended matter at 12m were made for carbon, nitrogen and phosphorus on most surveys, and mean values for the whole area are given. Suspended carbon was 67 /ig C/l. in January 1963 and 51 /*g C/l. in January 1964, a significant difference. Increases in sus-pended carbon, nitrogen and phosphorus were found in spring and summer 1964.

Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 52 , Issue 4 , November 1972 , pp. 915 - 930
Copyright
Copyright © Marine Biological Association of the United Kingdom 1972

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References

Armstrong, F. A. J. 1963. Determination of nitrate in water by ultraviolet spectrophotometry. Anal. Chem., Vol. 35, pp. 1292–3.CrossRefGoogle Scholar
Armstrong, F. A. J.Butler, E. I. & Boalch, G. T. 1970. Hydrographic and nutrient surveys in the western English Channel during 1961 and 1962. J. mar. biol. Ass. U.K., Vol. 50, pp.883–905.CrossRefGoogle Scholar
Belcher, R. & Spooner, C. E. 1943. A new technique for the ultimate micro-analysis of organic compounds. J. chem. Soc,1943, p. 313.Google Scholar
Crowther, A. B. & Large, R. S. 1956. Improved conditions for the sodium phenoxide-sodium hypochlorite method for the determination of ammonia. Analyst, Vol. 81, pp. 64–5.CrossRefGoogle Scholar
Ford, E. 1933. An account of the herring investigations conducted at Plymouth during the years from 1924 to 1933. J. mar. biol. Ass. U.K., Vol. 19, pp. 305–84.CrossRefGoogle Scholar
Harvey, H. W. 1948. The estimation of phosphate and total phosphorus in sea water. J. mar. biol. Ass. U.K., Vol. 27, pp. 337–59.CrossRefGoogle Scholar
Kemp, S. 1938. Oceanography and the fluctuations in marine animals. Rep. Brit. Assoc, 1938, pp. 85–101.Google Scholar
Murphy, S. & Riley, J. P. 1962. Modified single solution method for determination of phosphate in natural waters. Analytica Chitn. Acta, Vol. 27, pp. 31–6.CrossRefGoogle Scholar
Russell, F. S.Southward, A. J.Boalch, G. T. & Butler, E. I. 1971. Changes in biological conditions in the English Channel off Plymouth during the last half century. Nature, Lond., Vol. 234, pp. 468–70.CrossRefGoogle Scholar
Strickland, J. O. H. & Parsons, T. R. 1960. A manual of sea water analysis. Bull. Fish. Res. Bd. Can., No. 125, pp. 61–9.Google Scholar