Experimental Evolution of Communities

Our group uses theoretical and experimental approaches to understand the ecological and evolutionary dynamics of species interactions and disease. We integrate eco-evolutionary processes in dynamical landscapes, which incorporates issues such as spatio-temporal variation in environmental conditions, disturbance and connectivity (dispersal). We also study cancer evolution, the evolution of social strategies and innovations.

Our main experimental systems are protozoan model species (Tetrahymena, Paramecium) and their natural enemies (Didinium, Holospora), as well as bacteria (Pseudomonas aeruginosa) and their lytic phages.

EEC is back online!

As of 1/1/2018, Emanuel Fronhofer joins our team as a CNRS research scientist. Welcome, Emanuel! Visit his page and his personal website!


Phages and bacterial social evolution

A new article published by Marie Vasse, Clara Torres-Barceló and Michael Hochberg in the Proceedings of the Royal Society of London B, shows how phage predators impact social dynamics in the pathogenic bacterium Pseudomonas aeruginosa.

While predators and parasites are known for their effects on bacterial population biology, their impact on the dynamics of bacterial social [...]


Tragedy of the Tragedy of the Commons

Michael Hochberg and James Brown have just published an essay on what would appear to be the irreversibility of the tragedy of the commons for humanity.

Hochberg M.E. & Brown J.H. 2015. Tragedy of The Tragedy of the Commons. Ideas in Ecology and Evolution.  link to PDF


Fundamental Ecology is Fundamental

Michael Hochberg and collaborators have published an article in Trends in Ecology and Evolution on the importance of basic science. This paper stems from a symposium sponsored by the Société Française d’Ecologie at INTECOL in August 2013.

Courchamp F., Dunne J., Le Maho Y., May R.M., Thébaud C. & Hochberg M.E.  Fundamental Ecology is Fundamental. [...]


Combined phage – antibiotic therapies

Clara Torres-Barceló and EEC colleagues have published an article in PLoS ONE, investigating the impact of combined phage-antibiotic treatments on the nosocomial pathogen Pseudomonas aeruginosa.

Torres-Barceló C., Arias-Sanchez F., Vasse M., Ramsayer J., Kaltz O. & Hochberg M.E. 2014. A Window of Opportunity to Control the Bacterial Pathogen Pseudomonas aeruginosa Combining Antibiotics and Phages.  PLoS [...]


Phages and the Red Queen

Alex Betts and EEC colleagues have published an article in PNAS, investigating patterns of coevolution of the pathogenic bacterium Pseudomonas aeruginosa with various phages. See also here, and here.

Betts, A., O. Kaltz, and M. E. Hochberg. 2014. Contrasted coevolutionary dynamics between a bacterial pathogen and its bacteriophages. Proceedings of the National Acadamy of Sciences [...]


Russian colleagues revisiting EEC

EEC is currently hosting again Alexey Potekhin and Irina Nekrasova, for a collaboration with Oliver Kaltz.

Alexey and Irina are professors at the Dept. of Microbiology at St Petersburg State University. During their stay, they will investigate the ability of a newly found strain of the bacterial parasite Holospora karyophila to infect different species of the [...]


Vertically transmitted symbiont reduces host fitness along temperature gradient

Oliver Kaltz contributed to a paper by Eike Dusi and colleagues, investigating the impact of an exclusively vertically transmitted parasite on temperature reaction norms of the freshwater protozoan Paramecium tetraurelia.

Dusi, E., S. Krenek, M. Schrallhammer, R. Sachse, G. Rauch, O. Kaltz, and T. U. Berendonk. 2014. Vertically transmitted symbiont reduces host fitness along temperature gradient. [...]


Modelling host-parasite dynamics within a Bayesian framework

Oliver Kaltz and colleagues from Cambridge published an article in PloS ONE, fitting a model to experimental data of parasite epidemics in the Paramecium-Holospora system.

Lunn, D., R. J. Goudie, C. Wei, O. Kaltz, and O. Restif. 2013. Modelling the Dynamics of an Experimental Host-Pathogen Microcosm within a Hierarchical Bayesian Framework. PLoS ONE 8:e69775.

The [...]


Response of Sphagnum Peatland Testate Amoebae to a 1-Year Transplantation Experiment Along an Artificial Hydrological Gradient

Bertrand Fournier published a paper in Molecular Ecology about the response of peatland testate amoebae to various hydrological conditions in a transplantation experiment.

Marcisz, K., B. Fournier, D. Gilbert, M. Lamentowicz, and E. D. Mitchell. 2014. Response of Sphagnum Peatland Testate Amoebae to a 1-Year Transplantation Experiment Along an Artificial Hydrological Gradient. Microbial Ecology:1-9.