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Laboratoire d'Océanographie Microbienne
UMR 7621

Marine Landa

The purpose of my PhD is to study the link between the nature (origin and availability) of the dissolved organic matter (DOM) present in large amounts in the ocean, and the response (in terms of diversity and activity) of the bacteria that degrade it. The questions underlying this work address different fundamental aspects of the role of heterotrophic bacteria in the ocean : which bacteria grow on which types of compounds, what are the genes involved in the degradation of the DOM, are the bacteria competing over the carbon ressource or acting in consortia.
To try and solve these questions, we are setting up continuous cultures (chemostats) in which the bacteria are maintained over a certain period of time in presence of different types of DOM. The diversity in those cultures is assessed with the help of different molecular biology tools such as fingerprints and pyrosequencing.

Supervisors: Ingrid Obernosterer and Stéphane Blain

Project: BACCIO


2008-2010 : Master de Biologie Moléculaire et Cellulaire de l’Université Pierre et Marie Curie (UPMC-Paris 6) - Spécialité Microbiologie, option Microbiologie appliquée à la santé et à l’environnement.
2005-2008 : Licence de sciences de la vie de l’Université René Descartes (Paris 5).


Le LOMIC en chiffres

6 Chercheurs CNRS
4 Enseignant-chercheurs
8 Personnels techniques
4 Post doctorants
8 Etudiants en thèse

4 Etudiants Master2