Thesis on Hydrothermal sulfur cycle in the ocean


Fixed term contract

Plouzane, France

#oceans #data #engineer #argo

IUEM is proposing a thesis on the hydrothermal cycle of sulfur and its effect on the ecology and biogeochemistry of the ocean.

Host organisation

IUEM is a major player in French and European marine science research. Benefiting from the privileged environment of the Europôle Mer, which brings together more than half of the national potential in this field, its teams are present on all the major research issues and work on all the oceans: evolution and resistance of ecosystems, integrative biology of marine organisms, ocean and climate, life in the deep sea, law and economics of maritime activities, and human-nature relations in coastal environments.

Research at IUEM is carried out in seven research laboratories and two international joint laboratories in South Africa and Peru, within the framework of projects and programmes financed by the French National Research Agency (ANR) and the European Union.

The scientific research strategies are defined within each laboratory, but the interdisciplinary dynamics are directed and led by IUEM. It is this kind of cross-disciplinary work, extended to Ifremer’s own teams, the École Centrale de Nantes and the University of Nantes, that led to the creation of the Laboratory of Excellence on the Sea, LabexMER, in 2011.

Job description

This thesis aims to improve our knowledge of the catabolic pathways of microbial sulfur disproportionation, and to identify the catabolic routes and chemical intermediates of this reaction.

In that aim the candidate will be in charge of:

  • combining transcriptomics, and label free comparative proteomics (LC-MS/MS) to identify the proteins involved in this metabolism, by comparing the proteins (membrane and cytosolic-extracellular fractions) expressed by sulfur disproportionation bacteria under culture conditions favoring MSD or another metabolism (e.g. sulfate reduction), in gas-lift bioreactors
  • monitoring substrates, intermediates and metabolic products (gas and ionic chromatography, sulfide probe..)

Profile and skills

  • Master degree in microbiology or an engineering degree in microbiology
  • Knowledge of Pasteur microbiology, cultivation of aerobic and anaerobic, thermophilic microorganisms
  • Knowledge of microbial ecology of extreme marine habitats
  • Good level in scientific English (written and spoken)

Professional skills

  • Adaptability
  • Teamwork
  • Autonomy
  • Good communication (written and spoken)
  • Writing skills
  • Passion and excitement

Contract type

Fixed term, 3 years


Biologie et Ecologie des Écosystèmes marins Profonds BEEP, UMR 6197, IUEM, Plouzané, France

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