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Carbon and nitrogen content of Laminaria saccharina in the eastern English Channel: biometrics and seasonal variations

Published online by Cambridge University Press:  26 November 2001

F. Gevaert ,
D. Davoult ,
A. Creach ,
R. Kling ,
M.-A. Janquin ,
L. Seuront  and
Y. Lemoine
F. Gevaert
Affiliation:
Equipe Cytophysiologie Végétale et Phycologie, ESA 8013 ELICO, Université des Sciences et Technologies de Lille, Bâtiment SN2, 59655 Villeneuve d'Ascq Cedex, France
D. Davoult
Affiliation:
Laboratoire Biogéochimie et Environnement du Littoral, ESA 8013 ELICO, Université du Littoral - Côte d'Opale, 32 Avenue Foch, 62930 Wimereux, France
A. Creach
Affiliation:
Equipe Cytophysiologie Végétale et Phycologie, ESA 8013 ELICO, Université des Sciences et Technologies de Lille, Bâtiment SN2, 59655 Villeneuve d'Ascq Cedex, France
R. Kling
Affiliation:
Equipe Cytophysiologie Végétale et Phycologie, ESA 8013 ELICO, Université des Sciences et Technologies de Lille, Bâtiment SN2, 59655 Villeneuve d'Ascq Cedex, France
M.-A. Janquin
Affiliation:
Station Marine de Wimereux, ESA 8013 ELICO, 28 Avenue Foch, BP 80, 62930 Wimereux, France
L. Seuront
Affiliation:
Station Marine de Wimereux, ESA 8013 ELICO, 28 Avenue Foch, BP 80, 62930 Wimereux, France
Y. Lemoine
Affiliation:
Equipe Cytophysiologie Végétale et Phycologie, ESA 8013 ELICO, Université des Sciences et Technologies de Lille, Bâtiment SN2, 59655 Villeneuve d'Ascq Cedex, France
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Abstract

Fresh weight (FW), dry weight (DW), carbon and nitrogen content were measured for specimens of Laminaria saccharina (Heterokontophyta: Phaeophyceae) sampled in the eastern English Channel in order to conduct a biometrical study. The aim was to relate carbon and nitrogen masses of the algae to a simple and rapid morphological measurement of the total length of the sporophyte. These relationships were highly significant and appeared very useful to express the standing biomass of L. saccharina in terms of carbon or nitrogen and then to consider dynamic processes such as primary production. Variations in tissue carbon (C) and nitrogen (N) were examined over a complete seasonal cycle. Average carbon and nitrogen content ranged from 23·9 to 31·4% and 2·23 to 3·42% of the total dry weight, respectively. Variations in C/N ratio showed a clear seasonal pattern with an increase in the early spring corresponding to strong photosynthesis and growth.

Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 81 , Issue 5 , October 2001 , pp. 727 - 734
Copyright
2001 Marine Biological Association of the United Kingdom

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