Olivier Ragueneau

Apolimer co-founder & coordinator
Research Director at CNRS-LEMAR, Brest

Biogeochemistry, citizen science, sociology of science and sustainability science

Olivier Ragueneau is a marine biogeochemist, research director at the French National Center for Scientific Research (CNRS) within the Laboratory of Environmental Marine Sciences (LEMAR).

Between 1990 and 2010, he worked on the biogeochemical cycle of silicon, in close interaction with the carbon cycle, to address the role of diatoms both in the functioning of marine and coastal ecosystems and in the functioning of the biological carbon pump in the ocean. He always liked working at different interfaces, especially between reservoirs (water & sediment, land & sea), disciplines (biogeochemistry, physics, ecology) and tools (observation, experimentation).

Since then, his field became the interdisciplinary science of sustainability, as he developped interests in the political sociology of science. He has been increasingly working with different disciplines of the human and social sciences, as well as with organized civil society, in order to understand the functioning and trajectories of social-ecological systems. His goals are to foster inter- and trans-disciplinary research going in this direction and to understand the conditions which favor or hinder the transformation of territories towards greater sustainability.

Olivier Ragueneau believes that the duty of scientists is to get involved in society and take a stand in public space to help fuel reflections, on educated grounds, about the major issues awaiting our common future: climate change, biodiversity collapse, and their impacts on human societies. The responsibility of the academic world has concrete implications concerning the reduction of its environmental footprint, its role on the territories, and, finally, the meaning of research and education in a changing world.

Involved in Apolimer projects

Selection of publications

Ragueneau, O., Raimonet, M., Mazé, C., Coston-Guarini, J., Chauvaud, L., Danto, A., Grall, J., Jean, F., Paulet, Y.-M., et Thouzeau, G. (2018). The impossible sustainability of the Bay of Brest? Fifty years of ecosystem evolution, interdisciplinary knowledge construction and key questions at the science-policy-community interface. Frontiers in Marine Science, 5: 124. doi: 10.3389/fmars.2018.00124.

Ragueneau O., Regaudie-De-Gioux A., Moriceau B., Gallinari M., Vangriesheim Annick, Baurand F., Khripounoff Alexis (2009). A benthic Si mass balance on the Congo margin: Origin of the 4000 m DSi anomaly and implications for the transfer of Si from land to ocean. Deep Sea Research Part II: Topical Studies in Oceanography, 56(23), 2197-2207. Publisher’s official version : https://doi.org/10.1016/j.dsr2.2009.04.003 , Open Access version : https://archimer.ifremer.fr/doc/00000/7410/

Ragueneau, O., Tréguer, Leynaert, A., P., Anderson, R.F., Brzezinski, M.A., DeMaster, D.J., Dugdale, R.C., Dymond, J., Fischer, G., François, R., Heinze, C., Maier-Reimer, E., Martin-Jézéquel, V., Nelson, D., Quéguiner, B. (2000). A review of the Si cycle in the modern ocean: recent progress and missing gaps in the application of biogenic opal as a paleoproductivity proxy. Global and Planetary Change, 26: 317-365.