Informations générales
Intitulé de l'offre : Postdoc in geochemistry and paleoecology M/F (H/F)
Référence : UMR6249-SEBLAN-016
Nombre de Postes : 1
Lieu de travail : BESANCON
Date de publication : jeudi 13 novembre 2025
Type de contrat : Chercheur en contrat CDD
Durée du contrat : 20 mois
Date d'embauche prévue : 5 janvier 2026
Quotité de travail : Complet
Rémunération : 3000 € gross per month, to be adjusted according to experience
Niveau d'études souhaité : Doctorat
Expérience souhaitée : Indifférent
Section(s) CN : 30 - Surface continentale et interfaces
Missions
The ERC PaleoMARE project investigates the spread of antibiotic resistance genes (ARGs) in the environment. However, the mechanisms underlying the global dissemination of ARGs remain unresolved. The presence of heavy metal resistance genes (HMRGs) alongside ARGs in microbial genomes suggests a connection between them and has led to the hypothesis that metals may co-select for ARGs. This hypothesis is difficult to confirm because current ecosystems are contaminated with both. To address this, the PaleoMARE project integrates geochemical and microbiological approaches to uncover the links between heavy metal pollution and the spread of antimicrobial resistance from pre-industrial times to the present, using palaeoecological archives.
The candidate will have in-depth knowledge of lake sediment geochemistry and, ideally, knowledge of palaeoecology, particularly palynology. Their tasks will include:
1. Creating an age model for the collected sequences and, based on the results, selecting the sequences to be analysed.
2. Collecting and performing the planned sedimentary geochemical analyses (trace elements and metalloids) on the lake sequences. They may participate in pollen analysis if they have the necessary skills.
3. Cross-referencing the results with those of microbiology and participating in the publication of the results.
Activités
Geochemistry (and palynology) :
- Geochemical analysis of a lacustrine sedimentary sequence
- Palynological analysis of a lacustrine sedimentary sequence
- Age depth model and chronology of lacustrine sediments
- Dissemination of knowledge through scientific publications, seminars, and conferences
Compétences
- In-depth knowledge of isotopic geochemistry methods and trace metal analysis, with additional skills in palynology.
- Expertise in geochemistry and trace element analysis of lake sediments.
- Interpersonal skills: sociability and autonomy.
Contexte de travail
The work will be carried out at the Chrono-environment laboratory (UMR 6249/CNRS): possibility of field missions.