|
|
|
|
|
| Descolas-gros, C; Fontugne, M R. |
| Phytoplankton constitute the medium whereby carbon is transformed from the inorganic to the organic state in pelagic ecosystems. In terrestrial plants, the super(13)C/ super(12)C ratio of the organic matter (expressed as delta super(13)C) is a good indicator of carbon pathway. We measured this ratio together with three carboxylase activities: ribulose-1,5-bisphosphate carboxylase, phosphoenolpyruvate and phosphoenolpyruvate carboxykinase on Mediterranean phytoplankton communities. Results were obtained in the field during the Phycarb cruise in February 1984 and during the Epice experiment in a simulated enclosed water layer at Villefranche-sur-Mer in November 1984. These data were compared with those obtained previously on temperature phytoplankton (diatom... |
| Tipo: Text |
|
| Ano: 1988 |
URL: http://archimer.ifremer.fr/doc/00267/37826/35907.pdf |
| |
|
|
| Fouilland, E; Courties, C; Descolas-gros, C. |
| During the ANTARES 3 cruise in the Indian sector of the Southern Ocean in October-November 1995, the surface waters of Kerguelen Islands plume, and the surface and deeper waters (30-60 m) along a transect on 62 degrees E from 48 degrees 36'8 to the ice edge (58 degrees 50'S), were sampled. The phytoplankton community was size-fractionated (2 mu m) and cell numbers, chlorophyll biomass and carbon assimilation, through Rubisco and beta-carboxylase activities, were characterized. The highest contribution of <2 mu m cells to total biomass and total Rubisco activity was reported in the waters of the Permanent Open Ocean Zone (POOZ) located between 52 degrees S and 55 degrees S along 62 degrees E. In this zone, the picophytoplankton contributed from 26 to 50%... |
| Tipo: Text |
|
| Ano: 2000 |
URL: https://archimer.ifremer.fr/doc/00220/33126/31651.pdf |
| |
|
|
|
