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New paper out by Martignier et al., in Geobiology : discovery of a new biomineralization process by algae in lake Geneva --> Intracellular amorphous Barium and Strontium rich calcium carbonates


Fieldwork on lake Onego, in the Karelia Region, North of Saint Petersburgh

Fieldwork on lake Onego, in the Karelia Region, North of Saint Petersburgh

Fieldwork on lake has started with lab . 1st cores out and sampled 4 life under the ice!


Bathyarchaeota could be methanogens!

2 min read

A recent metagenome study by Evans et al., (2015) has detected the presence of a divergent mcrA gene sequence in Bathyarchaeota (formerly Miscellaneous Crenaorchaeotal group).

This has very strong implications such as : 

-not only members of the Euryachaeota phylum are able to perform methanogenesis 

-a version of mcrA existed in the Bathyarchaota and Euryarchaeota common ancestor

-new primers should be used to take into account the divergent Bathyarchaota mcrA gene to analysie methanogenesis, in the marine realm, and also in lacustrine ecosystems.

-these Bathyarchaeota can do a lot of amazing things (see Lloyd et al., 2013 & Meng et al., 2014)

here is the paper :

and here is a nice overview of the story : (where the figure below comes from)


Evans et al., (2015) Methane metabolism in the archaeal phylum Bathyarchaeota revealed by genome-centric metagenomics Science  350 (6259), 434-438. [DOI:10.1126/science.aac7745]
Lloyd, K. G., (2015) Beyond known methanogens Science : 350 (6259), 384. [DOI:10.1126/science.aad4066]

Lloyd, K. G., Schreiber, L., Petersen, D. G., Kjeldsen, K. U., Lever, M. A., Steen, A. D., ... & Jørgensen, B. B. (2013). Predominant archaea in marine sediments degrade detrital proteins. Nature, 496(7444), 215-218.

Meng, J., Xu, J., Qin, D., He, Y., Xiao, X., & Wang, F. (2014). Genetic and functional properties of uncultivated MCG archaea assessed by metagenome and gene expression analyses. The ISME journal, 8(3), 650-659.




Starting of a new project as a Postdoc @INRA lab. i'll be based at the University of Savoy Mont-Blanc to work on lake and lake methane cycle.


Impact of paleoclimate on the distribution of microbial communities in the subsurface sediment of the Dead Sea - Thomas - 2015 - Geobiology - Wiley Online Library

New @ICDPdrilling paper out by the team @UNIGEnews in Geneva. Connecting current subsurface communities with climatic variations over the Dead Sea Basin. When become a proxy for reconstructions.


Last day @UNIGEnews working on @icdpDrilling material from lake . Next: Postdoc @Univ_Savoie lab for lake geobiology


Using Social Media for Research Collaboration and Public Engagement

A broad view on the issue of communication in research. Why social media presence matters


Aux Lyonnais engagés, citoyens, responsables, innovants :
merci @ArmMax @LaPaillasaône allez hop à la Doua..