I am a biologist interested in very broad questions about the origin and early evolution of life on Earth, with a special focus on microbial lineages, which cover the vast majority of biological diversity.

puri.lopez@cnrs.fr

puri.lopez@universite-paris-saclay.fr

Many years ago, I had the chance to get an old microscope at home. It opened to me a new world full of wonderful organisms. Since then, I have always been interested in the diversity and evolution of microorganisms from the three domains of Life, trying to reconstruct their phylogeny and to understand how their genomes evolve. More recently, I also became interested in the evolutionary relationship between living (cells) and non-living (viruses) organisms.

david.moreira@universite-paris-saclay.fr

I am a microbial ecologist. The aim of my research activities is to better appreciate microbial diversity, to understand the processes that structure this diversity and to identify the role played by microorganisms in the functioning of aquatic ecosystems. more information...

Email: ludwig.jardillier@universite-paris-saclay.fr

Phone: 0033 169 157 989

My primary research interests are in evolutionary microbiology. I am particularly interested in the origin and evolution of the eukaryotic cell. My investigations revolve broadly around three topics: (1) Understanding the relationships of eukaryotes with the other two domains of life (Archaea and Bacteria); (2) Characterizing the evolution of key features of the eukaryotic cell ; (3) Investigating the phylogenetic relationships within the Tree of eukaryotes as well as the horizontal exchange of genetic material that might have occurred between distantly related eukaryote lineages. To tackle those, I have mainly used comparative (meta)genomic and molecular phylogenetic approaches, and I have focused on understudied unicellular eukaryotes (protists).

laura.eme@cnrs.fr

laura.eme@universite-paris-saclay.fr

yvan.zivanovic@cnrs.fr yvan.zivanovic@universite-paris-saclay.fr

philippe.deschamps@cnrs.fr

philippe.deschamps@universite-paris-saclay.fr

My interest in research and teaching started during my Degree in Biology. After a Master Degree in Clinical Microbiology I joined the laboratory of Microbial Ecology (Department of Ecology) as a PhD student under the supervision of Professors María del Carmen Guerrero and Ana Isabel López-Archilla. My doctorate "Microbial Mats: the implication of these microbial communities in the early stages of fossilization", in collaboration with the group of Palaeontology headed by the Prof. Angela D. Buscalioni and Karim Benzerara (IMPMC, Sorbonne Université), allowed me to delve into a complex topic (microorganism-mediated fossil formation) with a highly multidisciplinary approach (merging ecology, microbiology, palaeontology, geology, mineralogy and statistics) and achieve results with a significant impact on the community.

Then I joined Arnaud Brayard's team as part of his project "After the end: the rebuilding marine communities during the Rediversification of the Lower Triassic "[AFTER]. During this first postdoc in the laboratory of Biogéosciences at the Université de Dijon, I studied the fossil formation of the exceptional deposit of "Paris Biota" (Triassic, USA).

After Dijon I moved to Paris and became member of the team Diversity, Ecology and Evolution of Microbes (DEEM) under the supervision of Purificación López-García to study the formation of microbialites. Bioinformatics, microbial ecology and mineralogy would help us to unveil the factors (abiotic and biological) that determine the generation of these organosedimentary structures. Microbialites are now in vogue because they have a direct link to two impact topics. First, they are the first evidences of life on Earth. Stromatolites (a type of microbialite) have been accepted as the first living communities in the Ancient Earth and there is a great debate about the biological origin or not of some structures aged 3,500 Ma. Knowing the mechanisms that explain the formation of these structures is capital to solve this debate and would have a direct impact on finding traces of life on Mars. In addition, these communities often mineralize in carbonate, and can therefore act as carbon reservoirs. Real understanding of mineralization processes within microbialites could help us to increase and stimulate CO2 uptake by these communities and try to minimize the impact of global change on a global scale. In addition to that, I also collaborate in the characterization of the microbial diversity of diverse unknown environments mainly by metabarcoding approaches, and I also collaborate as expert in statistics with the MDr Villar-Quiles, neurologist at the Pitié Salpetrière Hospital - Sorbonne Université.

Regarding my teaching activity, I participate in classes at all levels (undergraduate, professional undergraduate, and master's) in subjects related to ecology, molecular biology, and microbiology:

• L2Pro - UE4 Bio-production - Microbiologie - Virologie (Responsible)
• L3Pro - Formation en Apprentissage/en Stage
• L3Pro - Exploration des Environnements Pro

• L3Pro - Génie Génétique

• L2BIO - Anglais scientifique

• L2BIO - Milieux Aquatiques

• L3BOE - Écologie : théorie et pratique

• Master BEE - Mise à niveau en écologie aquatique

• Master BEE - Milieux aquatiques : qualité et gestion
• Master BEE - Méthodologie et Ecologie
• Master BioSanté - Evolution et biodiversité des microorganismes

maria-cristina.ciobanu-costache@cnrs.fr maria.ciobanu@universite-paris-saclay.fr

Phone +33 (0)1 69 16 63 42

paola.bertolino@cnrs.fr

paola.bertolino@universite-paris-saclay.fr