Lejeusne Christophe

Lejeusne Christophe

MCF-Maitre de Conferences

NEMO, POE

Biodiversité, Écosystèmes, Changements globaux

As a marine ecologist, my research focuses mainly on the issue of biological invasions in the marine environment. I am interested in the ecological and/or evolutionary mechanisms that can explain the success and impact of these species transported from the other side of the Earth. In theory, these species have little chance of becoming more competitive than native species adapted to their environment, yet many of them succeed in doing so, causing major ecological and societal damages.

In addition to biological invasions, I am also interested in biodiversity in submarine caves. In particular, I’m trying to understand how the relationship between habitat fragmentation and connectivity can explain the distribution and genetic structuring of cave-dwelling species.

  • Depuis 2018 – Maître de conférence – IMBE, Aix-Marseille Université, Station marine d’Endoume
  • 2014-2018 – Maître de conférence – AD2M, Sorbonne Université, Sation Biologique de Roscoff
  • 2014 – Postdoc – Stazione Zoologica Anton Dorhn – Naples, Italie
  • 2010-2014 – Postdoc – Doñana Biological Station – Séville, Espagne
  • 2009 – Postdoc – Université de Nice
  • 2007-2008 – Postdoc – Great Lakes Institute for Environmental Research, Windsor, ON, Canada
  • 2015 – Doctorat Biosciences de l’Environnement – Marseille
  • Invasions biologiques
  • Ecologie marine
  • Ecologie des communautés
  • Ecologie moléculaire (phylogéographie, génétique des populations)
  • Grottes sous-marines
  • 2023-2025 : ‘POMMAR’ Eco-historical approach of marine harbor communities in the Mediterranean (AMX-21-RID-036 A*MIDex Interdisciplinarité)
  • 2023-2024 : ‘EpiMar’ Signatures épigénétiques des processus invasifs sous pression de pollution dans les écosystèmes marins artificialisés (CNRS MITI)
  • 2024-2025 : ‘MarInDiv’ Studying the biological and chemical diversities of Mediterranean Invertebrates in Marinas to reveal their antimicrobial potentials (Institut OCEAN AMU)