Marion Fourquez, a young researcher at the MIO, will present her work in SALLE ÉGÉEE ET VISIO on Thursday 19 May 2022 at 1pm "The bacterial respiration in the ocean: deciphering O2 and CO2 fluxes from cell to ecosystem levels".
The oceans are home to some of the most important microbial flora in terms of climate. Billions of microscopic plant cells, known as phytoplankton, populate the ocean surface and use the sun's energy through photosynthesis. Thanks to this biological process, carbon dioxide (CO2) is captured in surface waters and, as they grow, the phytoplankton convert it into particulate organic matter containing carbon. A fraction of this carbon can then be sequestered in the deep ocean, in what is known as the 'biological carbon pump'. My research focuses largely on the counterbalance to this pump: bacterial respiration, which converts this organic carbon back into CO2. I will be presenting the initial results of my project, showing that a conversion factor used at the scale of the cell generates a definite uncertainty in the carbon balance at the scale of the ecosystem.
https://univ-amu-fr.zoom.us/j/85923355185?pwd=BH3J1iyExSW6mXh70URAq0cYfL…