Major research topics

  • Analysis of marine eukaryotic communities using metabarcoding (nuclear 18S rRNA, plastid 16S rRNA genes).
  • Diversity and oceanic distribution of marine phytoplankton, in particular green algae and pelagophytes.
  • Polar ohytoplankton communities and their adaptation to the long winter polar night.
  • Development of databases for the analysis of eukaryotic metabarcodes: PR2, pr2-primers and metaPR2 (in progress)

Current Collaborations


PhenoMap (2020-2023)

Characterize unknown phytoplankton species

Phytopol (2015-2021)

Phytoplankton survival in the polar night

TaxMarc (2018-2021)

Marine protists in a changing Arctic

Green Edge (2015-2016)

The Arctic Spring Bloom.


International collaborative projects.


Roscoff Culture Collection


18S rRNA sequence database


18S rRNA metabarcode database

Micro B3 (2012-2015)

Marine Microbial Biodiversity, Bioinformatics, Biotechnology

MaCuMBA (2012-2016)

Marine Microorganisms: Cultivation Methods for Improving their Biotechnological Applications

Malina (2008-2011)

The Beaufort Sea ecosystem.

Recent Publications

More publications

We investigated the phytoplankton community structure across the marginal ice zone between the ice-free, Atlantic-influenced, east and the ice-covered, Arctic-influenced, west Baffin Bay using 18S rRNA high-throughput amplicon sequencing.
Elementa: Science of the Anthropocene, 2024

Seawater samples collected in spring (2012 to 2018), summer (2017) and winter (2018) were analyzed by amplicon sequencing of the V4 region of the 18S rRNA gene.
Scientific Reports 13:8519, 2023

I retrace the growth of the Roscoff Plankton Group and present some of the key scientific advances made during the last four decades.
Cahiers de Biologie Marine 64:53-63, 2023

We investigated habitat evolution across the tree of eukaryotes using a unique set of taxon-rich phylogenies inferred from a combination of long-read and short-read environmental metabarcoding data spanning the ribosomal DNA operon.
Nature Ecology and Evolution. DOI: 10.1038/s41559-022-01838-4, 2022

We investigated the diversity and biogeography of diatoms from five Svalbard fjords and from the observatory Hausgarten (Fram Strait) by combining algal isolation and cultivation and 18S rRNA gene metabarcoding.
Elementa, Science of the Antrhopocene 10: 00117. DOI: 10.1525/elementa.2021.00117, 2022

This paper presents a newly-assembled database of processed 18S rRNA metabarcodes that are annotated with the PR2 reference sequence database. This database, called metaPR2, contains 41 datasets corresponding to more than 4,000 samples and 73,000 ASVs.
Molecular Ecology Resources. DOI: 10.11111755-0998.13674, 2022

Submitted Publications

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