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Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Main Species Characteristics of Phytoplankton Spring Blooms in NE Atlantic and Arctic Waters (68-80A degrees N)
Auteurs :	Maria Degerlund, Auteur ; Hans Christian Eilertsen, Auteur
Type de document :	Article
Dans :	Estuaries and Coasts (33(2) MAR 2010)
Article en page(s) :	242-269
Résumé :	A compilation of phytoplankton species abundance data from the spring bloom along the northern Norwegian coast and in the Barents Sea shows that the quantitatively most important species are the prymnesiophyte Phaeocystis pouchetii and the common cold water to temperate diatoms Chaetoceros socialis, Skeletonema costatum sensu lato, Fragilariopsis oceanica, Thalassiosira spp., Chaetoceros furcellatus, Chaetoceros compressus, Chaetoceros debilis and Bacterosira bathyomphala. The relative abundance of diatoms and Phaeocystis varied highly and apparently stochastically between years. P. pouchetii occurred during all stages of the spring bloom and sometimes completely dominated the phytoplankton community. Along the Norwegian coast, the importance of P. pouchetii increased northwards. The species composition in coastal fjords at 70A degrees N is surprisingly similar to that of shelf waters in the Barents Sea (up to 80A degrees N). An exception is S. costatum sensu lato which was seldom observed in Arctic waters. Small flagellates (

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