Average chlorophyll concentration in the surface ocean (from mi-September 1997 to August 2007) from the ocean color sensor SeaWiFS (NASA). Subtropical gyres, in the center of the oceanic basins, are characterized by very low concentrations of chlorophyll a (dark blue) - Source : NASA's Earth Observatory (http:/earthobservatory.nasa.gov)
Dinoflagellate Ceratium tripos (Photo : Sophie Marro)
Drifting profiling floats in the Atlantic
Instrumented buoy (Photo : David Luquet)
Dinoflagellate Ceratium pentagonum var robustum (Photo : Sophie Marro)
Vue sous-marine d'un groupe de mésocosmes montrant un plongeur récoltant les pièges à sediment (© Stareso)
Villefranche-sur-Mer in stormy weather, winter 2011 - Photo : J.-M. Grisoni
Dinoflagellate Ceratium candelabrum var depressum (Photo : Sophie Marro)
Dinoflagellate Ceratium gravidum (Photo : Sophie Marro)
Seasonal evolution of the chlorophyll a concentration as obtained by the ocean color sensor SeaWiFS in the Atlantic Ocean.
Instrumented buoy (Photo : Emilie Diamond)
Deployment of a profiling float (Photo : Jean-Jacques Pangrazi)
Dinoflagellate Ceratium gravidum. In the video one can observe the movement of one of the two flagella. (Video : Sophie Marro)
Cténophores - Orgie de couleurs
Vagues de lumière iridescentes, à l'affût de proies, voici les cténophores.
Phytoplankton bloom observed in the Barents Sea (North of Norway) in August 2010 by the ocean color sensor MODIS onboard NASA satellite Aqua. Changes in ocean color result from modifications in the phytoplankton composition and concentration. The green colors are likely associated with the presence of diatoms. The shades of light blue result from the occurrence of coccolithophores, phytoplankton organisms that strongly reflect light due to their chalky shells - Source : NASA's Earth Observatory (http:/earthobservatory.nasa.gov)
Diatom genus Chaetoceros (Photo : Sophie Marro)
Colony of salps Salpa fusiformis (Photo : Fabien Lombard)
Squid larva (Photo : Fabien Lombard)
