We have broad interest in different questions on the ecology and evolution of microbial life, from the origin of microbial diversity and its evolution since life emerged on Earth to the role of microbial communities in biogeochemical cycles. We combine complementary approaches including the exploration of extant prokaryotic and eukaryotic diversity by metabarcoding analysis, metagenomics, single cell ‘omics’ and phylogenomics to infer microbial functions and to elucidate the order of emergence of the different microbial groups and unravel their early evolutionary history. We have also broad interdisciplinary questions, in particular at the biology-geology interface.
The DEEM team, initially co-founded by Puri Lopez-Garcia and David Moreira, is one of the seven research components in the Ecology, Systematics and Evolution unit (UMR 8079, CNRS – Université Paris-Saclay – AgroParisTech) now at the IDEEV site (Gif-sur-Yvette, France).
Metagenome-based inference of virus:microbe ratios across ecosystems suggests that DNA viruses have comparable abundances, at the order-of-magnitude level, to those of cells
New apusomonad flagellate species and genera add to the phylogenetic tree of eukaryotes
New data confirm that aphelids and fungi are sister clades and support a new division of Holomycota into Phytophagea (aphelids+fungi) and Opisthophagea (rozellids+microsporidia).
The sequences of organellar genomes of 25 red algae reveal independent size expansions due to intron proliferation.
Why we do not detect any life in the hypersaline and hyperacid brines of Dallol despite a high level of airborne contamination? We report a surprisingly rapid destruction of cells and DNA by these brines.
March 2023 - North of Chile: A new expedition to high altitude salt flats (‘salares’) and hot springs in the North of the Chilean Altiplano (Region de Atacama).
August 2022 - North of Canada: We have sampled thermokarstic lakes formed by the degradation of the permafrost to study greenhouse gas fluxes related to microbial acitity.
March 2022 - North of Chile: For several weeks, we have been sampling high altitude salt flats (‘salares’) and hot springs in the North of the Chilean Altiplano (Region de Antofagasta).
September 2021 - Iceland: a tour to collect diverse samples from hot springs across the island.
If you are a motivated graduate or PhD student or a young postdoc interested in our research activities and wishing to develop an original research project, please do not hesitate to contact us for an internship, a prospective position or to prepare an application to funding agencies.
March 2023 - A new DEEM expedition to the fascinating high altitude salt flats and hot springs of the Chilean altiplano. Unique microbial ecosystems sadly threatened by the exploitation of lithium in the name of "green" (?) energy
2023 - It's been one year since the DEEM team moved to the new IDEEV building at the Saclay plateau, an extended area of the Université Paris-Saclay - fully functional now
Spring 2023: Welcome to Bledina Dede, a new postdoc in the team. Have fun!
DEEM team - Unité d’Ecologie, Systématique et Evolution
Site IDEEV 12 rue 128, 91190 Gif-sur-Yvette, France
Phone: +33 (0)1 69 15 76 08