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Emmanuelle Medrinal

Dynamics of resident and active pelagic marine protist communities.

Emmanuelle Medrinal
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I'm passionate about oceans since my teens. I got a Bsc in Biology (France-2007). During my Msc (Québec/ISMER & France -2009) I discovered Oceanography and fall in love with. I realized my Msc thesis project in Dr.Lovejoy's laboratory. I never left and now carring a Ph.D in oceanography. My areas of interest and fields of experience are microorganisms, microbial loop, link between microorganisms and ecosystem, primary production, phytoplankton ecophysiology and molecular biology.

Connie Lovejoy

Biology, Laval University

09/2009 - present

Marine Biodiversity, MB-10: Microbial diversity and function

emmanuelle.medrinal.1@ulaval.ca

Protists, unicellular eukaryotes from 0.2 to 50 µm, are phylogenetically and morphologically diverse and are major components of the marine food chain. Structure of protist communities is largely determined by environmental conditions. The pyrosequencing can provide a thorough description of communities of protists, including rare organisms. This project examines the difference between resident (DNA) and active (RNA) communities of marine protists, targeting constitutive and functional genes. The aims of my Ph.D are to identify resident (DNA) and active communities (RNA) responses to environmental change, but also to demonstrate that active communities are first affected by environmental conditions, regardless of study area.

The specific project/thesis aims project are:

    1. Compare the resident and active protist communities during winter – spring tansition and aAnalyze the temporal dynamics of resident and active protist communities.
    2. Describe and compare resident and active protist communities in a range of environmental conditions. Develop a technique to identify the status communities (pre bloom, bloom or post-bloom).
    3. Identify transportation and assimilation of nitrate genes in phytoplankton communities and identify gene expression with RNA. Identify differences in expression between the two genes.

This project is linked with CHONe, because it is important to know community shape in order to judge the health of ecosystem. I sampled in two oceans (Atlantic and Arctic) and made a link between two major oceans surrounding Canada.

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