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Marine ecosystems play a central role in geochemical cycling and climate regulation. These environments harbour complex and cryptic communities dominated in terms of abundance and biomass by planktonic microbes including bacteria, archaea, viruses, and eukaryotic organisms (such as protists and fungi). These organisms form numerous and diverse interactions encompassing all kind of exchanges e.g. predator-prey relationships and all shades of symbiosis from commensalism to parasitism. However, this equilibrium is threatened by an un- precedent irreversible ecological transformation due to multifactorial anthropogenic changes. This phenomenon is illustrated by a variation in prevalence and severity of disease outbreaks, leading to massive die-offs events. A famous example that illustrates this effect is the oyster parasite Perkinsus marinus (Perkinsea) that has spread over 500km along the North-eastern coast of United States during a pronounced warming in 1990 and 1991.

In the framework of the ANR project PARASED, the goal of the proposed postdoctoral position funded by the “région bretagne” will be to decipher the plasticity of the virulence factors of highly invasive marine eukaryotic parasites of bivalves belonging to Perkinsus (Perkinsozoa, Alveolata). The post-doctoral position will aim to understand how P. olseni can infect two different hosts species (one native and the other one invasive) belonging to the genus, Ruditapes.

The position (38h30/week) will be located at LEMAR, UMR6539 in Brest with short stays in Adam Monier’s Lab at Exeter University. The successful candidate will work closely with Aurélie Chambouvet, Evelyne Derelle and Adam Monier who have complementary strong expertises in molecular biology and bioinformatic analyses.

Prerequisites for an application:

The highly motivated candidate must have defended its thesis for less than 2 years and must have spent at least 18 months abroad. The candidate must have practical experience and autonomy in molecular biology as well as ‘Omics’ analysis (background in bioinformatic analysis, genomic data and familiarity with meta-analysis is also expected). Finally, a good level of English is also required.

Duration: 18 months Starting date: 01 April 2020.

Interested applicants should send their CV plus motivation letter to Aurélie Chambouvet ( and Evelyne Derelle (


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