Our Research
Our research focuses on descriptive, functional, and evolutionary ecology. We explore marine ecosystems through their dynamics at various geographic and temporal scales, from molecular processes to complex communities. The different AD2M teams direct their inquiries toward organisms distributed across the entire tree of life: from photosynthetic prokaryotes to all unicellular eukaryotes (protists) in plankton, and from macroalgae to various marine invertebrates, mainly benthic.
We have collective expertise in ecology, evolution, physiology, biogeochemistry, and oceanography.
Our work spans the entire oceanic domain and relies on oceanographic expeditions to explore remote areas, from the pelagic environment down to the deep sea.
Contact(s)
- Laure GuillouDirector of the department
- Eric BonnivardCo-director
- Céline ManceauExecutive assistant
News
Scientific publication
[PNAS] How to upgrade stolen organelles into permanent plastids : A comparative transcriptomic perspective
Publié le 24 October 2025
4 research teams
Team EDYMAR - Ecogeochemistry and DYnamics of MARine systems
The team focuses on the functioning of marine ecosystems. Its overall scientific approach—ecogeochemistry—examines the joint dynamics of living organisms and abiotic factors (the physico-chemical dynamics of the studied environments) and their interactions. The aim is to understand the properties and functioning of marine ecosystems, particularly coastal ones.
Team ECOPHY - Ecophysiology of Marine Invertebrates
The team takes a hologenomic approach, which considers the organism and its associated microbiota, as well as the different levels of interaction between them. The team focuses on species that have biological, societal, and economic importance, such as shellfish and other invertebrates that are commercially harvested for food
Team ECOMAP - Ecology of Marine Plankton
The team is studying the diversity, ecology, physiology and evolution of marine microbes and their interactions with other members of the community across various taxonomic and ecosystemic scales.
Team DiSEEM - Dispersal, Speciation and Evolution of Marine Species
The DiSEEM team studies connectivity between populations of marine organisms at different spatial scales and its consequences on evolutionary processes: in particular, adaptation to environmental heterogeneity, the evolution of reproductive isolation between populations, and the long-term evolution of reproductive systems and thermotolerance in marine organisms.
Publications
Prokaryotic microbiota outperform eukaryotic microbiota in differentiating between infection states of iconic diseases of two commercial oyster species
K. Mathias Wegner, Benjamin Morga, Laure Guillou, Martina Strittmatter, Cyrielle Lecadet, et al.. Prokaryotic microbiota outperform eukaryotic microbiota in differentiating between infection states of iconic diseases of two commercial oyster species. Aquaculture, 2025, 594, pp.741363. ⟨10.1016/j.aquaculture.2024.741363⟩. ⟨hal-04665295⟩
Fouling community shows high resistance and metabolic resilience towards experimental high intensity heatwave
Robin P.M. Gauff, Stephane Greff, Olivier Bohner, Stéphane Loisel, Christophe Lejeusne, et al.. Fouling community shows high resistance and metabolic resilience towards experimental high intensity heatwave. Marine Environmental Research, 2025, 203, pp.106813. ⟨10.1016/j.marenvres.2024.106813⟩. ⟨hal-04775806⟩
Sex chromosomes and chromosomal rearrangements are key to behavioural sexual isolation in Jaera albifrons marine isopods
Ambre Ribardiere, Claire Daguin-Thiebaut, Jerome Coudret, Gildas Le Corguille, Komlan Avia, et al.. Sex chromosomes and chromosomal rearrangements are key to behavioural sexual isolation in Jaera albifrons marine isopods. 2025. ⟨hal-04923366⟩
Chromatic acclimation shapes phytoplankton biogeography
Francesco Mattei, Anna Hickman, Julia Uitz, Louison Dufour, Vincenzo Vellucci, et al.. Chromatic acclimation shapes phytoplankton biogeography. Science Advances , 2025, 11 (8), ⟨10.1126/sciadv.adr9609⟩. ⟨hal-04962714⟩
A single theory for the evolution of sex chromosomes and the two rules of speciation
Thomas Lenormand, Denis Roze. A single theory for the evolution of sex chromosomes and the two rules of speciation. Science, 2025, 389, pp.eado9032. ⟨10.1126/science.ado9032⟩. ⟨hal-04736667⟩
Symbionts of predatory protists are widespread in the oceans and related to animal pathogens
Fabian Wittmers, Camille Poirier, Charles Bachy, Charlotte Eckmann, Olga Matantseva, et al.. Symbionts of predatory protists are widespread in the oceans and related to animal pathogens. Cell Host & Microbe, 2025, 33 (2), pp.182-199.e7. ⟨10.1016/j.chom.2025.01.009⟩. ⟨hal-04968405⟩