Understanding the functioning of marine ecosystems relies on the study of large-scale (e.g. climate), (sub-)mesoscale (e.g. ocean dynamics), and local (e.g. microenvironment) forcings as well as on the study of natural and anthropogenic environmental variations (e.g. temperature, pH, salinity, light, nutrients, oxygenation, pollutants…). Understanding the effects of these forcings at different levels of integration (from the individual to the communities, through biogeochemical cycles) relies in part on the combination of three methodological approaches: in situ observation, experimentation and modeling, often implemented in a decoupled manner, sometimes due to the lack of a common language between specialties, to the lack of anticipated dialogue, or due to problems of cross-scale transfer.


To boost scientific exchanges by involving LEMAR modellers, experimenters and observers in:

  • Strengthening interdisciplinary and methodological synergy on coupling approaches, involving approaches at different spatial and temporal scales.
  • Promoting interactions between researchers from the three LEMAR teams.
  • Serving as an incubator of ideas and supporting the realization and emergence of co-constructed projects
  • Bringing out new collaborations with people outside LEMAR (by organizing seminars, workshops…).


  • Impacts of biotic and abiotic environmental stresses; from the sub-individual to populations and communities
  • Population dynamics: competition, predation, connectivity, etc.
  • Biogeochemistry and matter transfers at different scales and interfaces
  • Paleoecology, climate scenarios
  • Socio-ecosystems


Hélène Planquette (Chibido, CNRS), Yoann Thomas (Discovery, IRD), Marie Vagner (Panorama, CNRS)

  • One meeting per quarter to discuss projects in progress or under construction, feedback, …
  • Relay of information on events (training, workshops, etc.).
  • Organization of workshops open to other laboratories.


Research projects integrating the coupling of approaches



Ecotox - expo in tubo

Origin :

It is largely accepted by researchers interested in the functioning of aquatic ecosystems submitted to anthropogenic pressure that chemical contaminants, biological toxins and even, nanoparticles, interact with biological systems, from individual health to more complex levels of the ecological organization. For decades, the LEMAR laboratory has managed national and international research programmes aiming to better understand the environmental impact of this pollution in coastal ecosystems. This expertise has allowed our scientists to manage or get a partnership in several research networks in aquatic ecotoxicology (see links below).

Objectives :

  • Scientific animation
    • sharing expertise in basic scientific fields (chemistry/biology/ecology)
    • funding strategy
    • links with marine environment monitoring facilities
    • partnership with institutes in charge of pollution research or water quality monitoring
    • links with research networks in aquatic ecotoxicology
  • Communication
    • information on grant proposals, job opportunities, …
    • external visibility of LEMAR in this field (recruitment of collaborators and students, others universities, local and regional actors, ….)
    • internal visibility (PhD management, meetings, ….)
  • Academic training
    • involvement of the LEMAR staff in academic education in marine sciences (including new numeric tools)

Animation  :


Organization of the meetings :

Internal meetings every 3 months, including presentations about projects in ecotoxicology. Invited speakers will be scheduled as well.

External links:  Le réseau international en écotoxicologie des milieux aquatiques ECOBIM

LEMAR in the south

Le LEMAR a de nombreux projets dans la zone intertropicale, que ce soit en Amérique Latine, dans les Caraïbes, en Afrique, dans l’Océan Indien, en Asie ou en Océanie. Du fait de la mixité des tutelles au sein du laboratoire (CNRS, Ifre­mer, UBO et IRD), les objectifs des chercheurs et enseignants-chercheurs impliqués dans les pays du Sud et les départements et territoires d’outre-mer (DOM-TOM) peuvent être distincts.

Objectifs de l’axe :

  • Améliorer, au sein du LEMAR, la concertation des actions menées au Sud, pour une meilleure lisibilité de nos activités, et la définition de stratégies coordonnées entre les différentes thématiques abordées au sein du laboratoire, mais aussi entre les différentes tutelles ayant chacune des objectifs distincts;
  • Favoriser les échanges, les retours d’expérience, dans l’optique de renforcer les projets existants, de faciliter le montage de nouveaux projets et d’optimiser les moyens mis en œuvre pour les réaliser;
  • Pérenniser et développer les réseaux de collaborations
  • Contribuer à l’organisation et à la mise en œuvre de formations spécifiques dans les pays du Sud et dans l’outre-mer français.

Animation de l’axe :


Organisation des séances : Une réunion de 2h par trimestre, avec généralement 2 présentations (projets, retour de mission, outils, formations…) et les actualités du moment.

Carte LEMAR au Sud

Carte des sites d’étude du LEMAR au Sud


Projets de recherche

“Undisciplined” transverse axis

Objectives of axis : Culture of interdisciplinarity in marine environmental sciences Stimulate LEMAR’s participation in inter-, trans- and, finally, in-disciplinary work Sharing our experiences Animation of the axis : Olivier Ragueneau and Marie Bonnin Organization of meetings: Each session is built around a theme. The 2h session is divided into 3 sequences: Short intro (10 […]