Context
In the framework of the PEPR FairCarboN project Deep-C, we offer a 18-month postdoctoral position aimed at identifying the key processes that determine the fate of OC once in standing freshwater ecosystems, i.e. whether it accumulates in sediments, is transferred to benthic and/or pelagic food webs, or is emitted to the atmosphere. In particular, we are interested in how environmental variability, including natural and anthropogenic changes, affects the origin, quantity and quality of OM stocks in sediments and the balance between different OC fates. We specifically focus on the interplay between the different OC fates under environmental changes. To achieve this, the project will benefit from data on environmental drivers, OM characterisation and OC fates from 40 pilot sites in France, covering a wide range of land cover, climatic conditions and water types, including natural and artificial standing waters (e.g. lakes, ponds and reservoirs). This project aims to accurately quantify the role of standing freshwater ecosystems in the global carbon cycle, including small water bodies for which such knowledge is lacking, and how it is being altered by environmental change.
Job description
The tasks of the PostDoc will include:
– Analysis of data already collected each month for one year at four initial pilot sites, covering natural and artificial water bodies (characterization of organic matter, production of GES from the sediment, concentration in the water column and emission in the atmosphere, incorporation in the food web through the analysis of stable isotope data as well as environmental data)
– Coordinate and participate in field and laboratory data collection at a larger number of pilot sites
– Participate in the review of existing data from scientific literature and international/national partnerships
– Communication of results (scientific papers and oral presentations) and participation in workshops/seminars embedded in the FairCarbon programme.
Profile of the applicant
– PhD in a field related to the research subject (environmental science, biogeochemistry, ecology etc.)
– Strong background in the study of processes involved in C cycling in aquatic ecosystems
– Enjoy working in the field and as part of a team
– Experience in coding (e.g. R, Python)
– People accepting to travel for several days during fieldwork period.
– Good English skills, both in written and spoken language
Academic supervision:
Main supervisors: Hélène Masclaux – UMR 6249 CNRS-UMLP, Besançon, France and Fanny Colas – UMR5023 LEHNA, Lyon, France.
Scientific cooperation:
Laurent Millet – UMR 6249 CNRS-UFC, Besançon, France.
Jean-Philippe Jenny – INRAE Carrtel, Thonon-les-Bains
Didier Jezequel – INRAE Carrtel, Thonon-les-Bains
David Etienne – Université Savoie Mont Blanc, Chambéry
Emilie Lyautet– Université Savoie Mont Blanc, Chambéry
Yves Prairie – UQAM, Montréal
Work location: Chrono-Environnement laboratory UMR 6249 CNRS-UMLP (Besançon, France) with frequent journeys to Lyon (LEHNA Laboratory)
Starting date: November 2025
Deadline for application: September 15
To apply:
You must submit your application (CV + cover letter) via the website: https://emploi.cnrs.fr/Offres/CDD/UMR6249-SEBLAN-014/Default.aspx
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