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Etude des populations de Sargassum muticum (Yendo) Fensholt sur les côtes de Basse-Normandie (France)
Givernaud, T.; Cosson, J.; Givernaud-Mouradi, A. (1991). Etude des populations de Sargassum muticum (Yendo) Fensholt sur les côtes de Basse-Normandie (France), in: Elliott, M. et al. (Ed.) Estuaries and Coasts: Spatial and Temporal Intercomparisons. ECSA 19 Symposium, University of Caen, France. pp. 129-132
In: Elliott, M.; Ducrotoy, J.-P. (Ed.) (1991). Estuaries and coasts: Spatial and temporal intercomparisons. ECSA 19 Symposium, University of Caen, France. International Symposium Series, 3. Olsen & Olsen: Fredensborg. ISBN 87-85215-17-1. VII, 390 pp., more
In: International Symposium Series. Olsen & Olsen: Fredensborg, more
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Keywords
    Taxa > Species > Introduced species
    [WoRMS]
    Marine/Coastal
Authors  Top 
  • Givernaud, T.
  • Cosson, J.
  • Givernaud-Mouradi, A.
Abstract
    The brown alga Sargassum muticum appeared on the French coasts thirteen years ago. In the framework of a National Programme different investigations have been undertaken on this seaweed. In Basse-Normandie distribution maps of the alga along the coast were drawn up: there are five important populations located on wide, flat, relatively sheltered shores with large ponds at low tide. The estimated biomass of this alga in Basse-Normandie amounts to 19 000 tons during its full development season. The evolution of three populations were studied over a year and differences were found to exist between the stations. The introduction and development of S. muticum along the coast of Basse-Normandie seem to have little effect on the environment. Only two species have suffered from the competition with this seaweed: Laminaria saccharina which has practically disappeared on the coast at Grandcamp, and Zostera marina which has been supplanted by S. muticum in parts of the beds injured by human activities.
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