Postdoctoral Research Associate In Marine Ecotoxicology H/F Ifremer
Port-en-Bessin-Huppain - 14 CDD- 🏠 Télétravail occasionnel
- 🕑 12 mois
- Bac +5
- Secteur Energie • Environnement
- Exp. - 1 an
Les missions du poste
Deadline for applications : 06/04/2025
The Laboratoire Environnement Ressources de Normandie (LER/N) is one of the 10 laboratories of the COAST Unit (observation et éCOlogie de la réstaAuration des écoSysTèmes littoraux). Located in Port-en-Bessin, IT provides scientific and technical expertise on the quality of marine ecosystems along the Normandy coast. Its activities focus on three areas
- Monitoring and observation of water and habitat quality;
- Providing expert advice to local authorities, public bodies and professional organizations, and issuing opinions to ministries and decentralized departments;
- Research in direct response to social and economic issues, on a regional, national and international scale.
The laboratory's recent activities have focused on coastal observation in relation to water quality and the functioning of coastal ecosystems under anthropogenic pressures, including the impacts of major energy production and port infrastructures. Hence, the laboratory contributes Ifremer's expertise to government departments within the framework of GEODE (Groupe d'Etude et d'Observation sur le Dragage et l'Environnement), in order to implement optimized management of maritime accesses, notably integrating environmental issues.
Located in Port en Bessin, within the Oceanography and Ecosystem Dynamics Department and the COAST unit, the position reports to the Head of the Normandy Environment and Resources Laboratory.
General areas of responsibility
According to ICES/OSPAR and the NORMAN network, one of the existing approaches for assessing the risk of impact on organisms from immersions or remobilizations of contaminated sediments is based on a battery of ecotoxicological bioassays. These tests involve exposing organisms from different trophic levels to total sediment (i.e. solid phase) and/or to an elutriate of this sediment (i.e. liquid phase), in order to specifically consider contaminants that can BE remobilized from the sediment. However, environmental risk assessment for the dumping of port dredged sediments at SEA is currently based primarily on chemical analyses of contaminants, whose concentrations are compared with the N1 and N2 guide values for decision-making (Arrêté du 30 juin 2020 modifiant l'Arrêté du 9 août 2006), and more recently with the N3 threshold (Arrêté du 27 mars 2024). If the N1 level is exceeded for any contaminant, an ecotoxic risk assessment can BE triggered by carrying out bioassays on the sediments to BE dredged. To better understand this risk, a new assessment protocol has been proposed as part of the ECOSED project (2022-2024), based on four sediment bioassays : determination of the inhibitory effect of water samples on the luminescence of Vibrio fischeri (NF EN ISO 11348-3 : 2009) and sediment samples (Doe et al, 2005), the microalgae growth inhibition test with Phaeodactylum tricornutum (NF EN ISO 10253 : 2024), and the determination of acute lethal toxicity to the marine copepod Tisbe battagliai (FD ISO 14669 : 2003).
As part of the ECONOR project (2025-2026) funded by the Agence de l'Eau Seine-Normandie, the candidate will implement these bioassays on sediments collected during the ROCCH-SED 2025 campaign (Réseau d'Observation de la Contamination Chimique dans le SEDiment), then in port and estuarine samples from the Normandy coast. She/he will build on the results acquired to assess a basal level of response of selected bioassays in marine sediments, and study the port-coastal gradient of sediment ecotoxicity. She/he will thus contribute to a better assessment of the sensitivity of these bioassays on marine sediments to evaluate the ecotoxic risk as well as the basal response of these tests, with the aim of defining a toxicity threshold for dredged sediments for disposal at SEA. She/he will work in close collaboration with Ifremer researchers, as well as with a trainee currently at LER/N and a laboratory technician. The candidate will BE in charge of valorizing these acquisitions through the publication of rank A article(s).
The candidate should have a good knowledge of ecotoxicology, including solid practical laboratory experience. Knowledge of the marine environment and sediment matrix is advisable.
Principal activities
- He/she plans, organizes and implements the above-mentioned bioassays on samples collected during the ROCCH-SED 2025 campaign, in ports and estuaries.
- He/she carries out statistical processing of the data acquired, in conjunction with the results of chemical analyses acquired elsewhere.
- He/she takes part in structuring the acquired data in a database, and leads its publication in rank A article(s).
- He/she may take part in SEA and foreshore sampling on the Normandy coast.
- He/she may take part in meetings to promote this work and in a symposium.
Collaborative work environment
- Internal collaborative relationship
- staff of the COAST unit, national coordinator of the ROCCH network, experts in ecotoxicology and chemical risk analysis (CCEM unit)
- External collaborative relationship
- Ifremer's scientific and institutional partners (e.g. Université de Caen, Directions Départementales des Territoires et de la Mer, Agence de l'Eau Seine Normandie)
L'adresse du poste
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Le profil recherché
Required education and experience
- PhD in ecotoxicology, defended within the last 3 years
- Laboratory experience in ecotoxicological testing
- Excellent writing and oral skills in French and English
Required knowledge, skills and characteristics
- Knowlledge, skills and abilities
- Theoretical knowledge and technical skills in ecotoxicology, if possible on bioassays
- Skills in statistical processing of ecotoxicological results (RegTox, Mosaic)
- Knowledge of the marine environment and sediment matrix
- Knowledge of environmental risk assessment
- Personal qualities
- Scientific and laboratory rigor
- Organization and autonomy
- Ability to work as part of a team
- Initiative, ability to synthesize and intellectual curiosity
- Writing skills in French and English
- Oral communication skills
Bienvenue chez Ifremer
Join Ifremer, an ally of planetary well-being, to gain a better understanding of and better protection for the ocean.
From the abyss to the surface, from the coast to the open SEA, Ifremer is the French research institute that is wholly dedicated to the Ocean. Its teams carry out research, innovate and produce expert reports to protect the ocean, exploit its resources in a responsible manner and shares marine data.
Ifremer contributes its scientific expertise to throw light on public policies and develops solutions drawn from the ocean to meet the challenges of the ecological transition. Ifremer is the operator of France's oceanographic fleet with its shipbuilding subsidiary Genavir, and imagines, designs and deploys leading edge technological means to solve the ocean's mysteries.
Join our teams, made up of 1500 scientists and research support staff, present all along the coastal areas of France and French overseas territories.
www.ifremer.fr
Infos complémentaires
Specific working conditions
- Full time job
- Analytical laboratory work
- Field missions (foreshore, port, boat) possible, mainly in the region
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