Dupouy Douchement Cécile, Blanchot Jean, Le Bouteiller Aubert, Neveux J. (1995). Variations in the light absorption properties of phytoplankton in the equatorial Pacific : oligo- to mesotrophy. In :
Guyot G. (ed.). Proceedings of the international colloquium photosynthesis and remote sensing. Paris : EARSeL, p. 307-311. Photosynthesis and Remote Sensing : International Colloquium, Montpellier (FRA), 1995/08/28-30.
Titre du document
Variations in the light absorption properties of phytoplankton in the equatorial Pacific : oligo- to mesotrophy
Année de publication
1995
Type de document
Colloque
Auteurs
Dupouy Douchement Cécile, Blanchot Jean, Le Bouteiller Aubert, Neveux J.
In
Guyot G. (ed.), Proceedings of the international colloquium photosynthesis and remote sensing
Source
Paris : EARSeL, 1995,
p. 307-311
Colloque
Photosynthesis and Remote Sensing : International Colloquium, Montpellier (FRA), 1995/08/28-30
The in vivo specific absorption coefficient of phytoplankton a*ph (lambda) was measured along an equatorial transect in the Pacific Ocean during the JGOFS-cruise in Octobre 1994 in order to validate bio-optical models of primary production. The fiber filter technique was used on board, as well as spectrofluorometry for pigment determination and flow cytometry for cells counting. The a*ph (435-441 nm) walues strongly decreased from oligotrophic to mesotrophic waters (between 170°E and 153°W). This zonal variation reflected a change in phytoplankton composition, dominated by Prochlorococcus in the oligotrophic zone and by picoeucaryotes in the mesotrophic one. Such variations in a*ph have to be taken into account for estimating primary production of the equatorial Pacific Ocean from ocean colour imagery. (Résumé d'auteur)
