2 year post-doctoral position available
Exploring methylmercury compound specific stable isotope analysis to trace its origin and fate in marine ecosystems
Post-doctoral profile: Full-time (2yr) position at the GET laboratory (OMP, Toulouse, France), and in collaboration with UMR LMD/IPSL (L. Bopp, Paris, France, Carbon Cycle, Climate Research), UMR LEMAR (A. Lorrain Brest, France, Marine Predator Foraging Ecology), and UMR MIO (L. E. Heimburger, Marseille, France, Marine Mercury Biogeochemistry). We are looking for Post-doctoral candidates with a strong background in mercury and/or carbon stable isotope metrology and biogeochemistry, and if possible compound specific isotope analysis (CSIA) by GC-C-IR-MS. The research objectives are (1) to apply current MC-ICP-MS (Hg isotopes δ202Hg, Δ199/200Hg) and improve GC-C-IR-MS (δ13C) methodologies for the stable isotope analysis of methylmercury (MeHg, CH3Hg) in biological matrices in the low ng/g range, (2) conduct laboratory experiments to understand the organometallic stable isotope fractionation mechanisms of MeHg during abiotic methylation/demethylation experiments, (3) explore the 2D (δ202Hg-Δ199/200Hg, and δ13C) isotope signatures of CH3Hg in coastal/pelagic fish tissue collections from the global oceans. Particular attention will be paid to provide new insights into the links between the global marine C cycle and MeHg formation by comparing MeHg δ13C values in mesopelagic and epipelagic fish to oceanic δ13C baseline values for different organic components obtained from the NEMO-PISCES model. This postdoctoral position is part of the recently funded ANR (Agence Nationale de la Recherche) “MERTOX” project (2017-2021) “Unraveling the origin of methylMERcury TOXin in marine ecosystems” (PI D. POINT). Strong emphasis will be put on the pluridisciplinary aspects for this postdoctoral position at the frontiers of analytical sciences, stable isotopes biogeochemistry, and ecology. Knowledge of the English language, laboratory skills, international mobility, and the willingness to present results at international conferences are required.
Full funding (2 years) available for opening the position by mid 2018.
D. Point, PhD
J. E. Sonke, PhD
Geosciences Environment Toulouse (GET)
Midi-Pyrenees Observatory (OMP)
14 avenue Edouard Belin
31400 Toulouse, France