After attending the Ecole Polytechnique in Paris, the Ecole Nationale du Génie Rural and working as an engineer for a few years, I completed a PhD on the cell cycle regulation of phytoplankton under the guidance of Penny Chisholm at MIT, Cambridge, US. Since 1985, I have been a researcher at CNRS, working at the Station Biologique of Roscoff (France). I developed initially applications of flow cytometry to measure picoplankton abundance in the Ocean. Around 1995, I began to focus on the diversity and ecology of eukaryotic picophytoplankton developing molecular approaches such as gene cloning, metabarcoding and metagenomics. Currently my interests revolve around green algae, bolidophytes and haptophytes involved in symbioses with cyanobacteria. I have also a keen interest in processing and analysis of large metabarcoding datasets, using in particular the R language. I created in 1998 the Roscoff Culture Collection, which is now the biggest collection in the world for marine phytoplankton. I am also maintaining the PR2 database, a large repository of curated eukaryotic 18S rRNA sequences which is used as a reference to assign metabarcodes. I am a visiting Professor at the Asian School of the Environment, Nanyang Technological University, Singapore.

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