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An exposure scale for marine shores in western Norway

Published online by Cambridge University Press:  11 May 2009

D. H. Dalby ,
E. B. Cowell ,
W. J. Syratt  and
J. H. Crothers
D. H. Dalby
Affiliation:
Department of Botany, Imperial College, London
E. B. Cowell
Affiliation:
The British Petroleum Company Ltd, Brittanic House, Moor Lane, London
W. J. Syratt
Affiliation:
BP Petroleum Development Ltd, P.O. Box 16, Lerwick, Shetland
J. H. Crothers
Affiliation:
Field Studies Council, Leonard Wills Field Centre, Williton, Taunton, Somerset
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Extract

A rocky shore exposure scale, intended primarily for use in the Fensfjord area, Western Norway, has been prepared. This scale is developed from an earlier scale devised by Ballantine for Milford Haven, Wales, making use of species abundance curves along the wave exposure gradient. Independent evidence for the validity of the scale is provided by shell shape variation in Nucella lapillus and by the height of the black lichen zone in the supralittoral fringe. The successive steps in the preparation of the scale are outlined, definitions of the exposure grades are given in tabular form for the restricted set of species analysed numerically and descriptions are provided in an extended form to provide a fuller picture for users of the scale. It is believed that the scale will prove applicable to other rocky shores around the North Sea.

Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 58 , Issue 4 , November 1978 , pp. 975 - 996
Copyright
Copyright © Marine Biological Association of the United Kingdom 1978

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References

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