Our group associate theoretical and experimental approaches to understand the dynamics of species diversity over short (ecological) and long (evolutionary) time scales.

Our approaches are multidisciplinary, mixing community and ecosystem ecology, biogeography, evolution, microbiology, conservation biology and modeling of complex systems.

We use different techniques and biological material :

(1) mathematical modeling,

(2) experimental evolution (with two systems : Pseudomonas fluorescens SBW25 and its lytic phage SBW25Φ2 and the protozoan Paramecium caudatum and its bacterial parasite Holospora undulata),

(3) data analyses on large-scale species distribution datasets (Birds, Fishes, Rodents and their parasites).
08.01.14

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 [...]

08.01.14

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 [...]

03.13.14

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. [...]

03.13.14

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 [...]

01.31.14

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.

[...]

01.31.14

Can soil testate amoebae be used for estimating the time since death? A field experiment in a deciduous forest

Bertrand Fournier published a paper in Forensic Sience International on the potential of a group of soil protozoa as indicator of time since death in deciduous forests.

Szelecz, I., B. Fournier, C. Seppey, J. Amendt, and E. Mitchell. 2014. Can soil testate amoebae be used for estimating the time since death? A field experiment in [...]

01.07.14

Disentangling the role of connectivity, environmental filtering, and spatial structure on metacommunity dynamics

Vincent Devictor, Nicolas Mouquet and collaborators have published a paper in Oikos where Ocean models are used to evaluation the exchange rates of organisms between communities in a marine Mediterranean coastal area; These were used to quantify the effects of realistic connectivity on local and regional polychaete community structure, and revealed that the environmental gradient, geographic distances. This [...]

01.07.14

Spatio-temporal heterogeneity of riparian soil morphology in a restored floodplain

Bertrand Fournier published a paper in Hydrology and Earth System Sciences on the variability of riparian soils and their importance for foodplain restoration.

Fournier B., Guenat C., Bullinger-Weber G., and Mitchell E.A.D. (2013). Spatio-temporal heterogeneity of riparian soil morphology in a restored floodplain. Hydrol. Earth Syst. Sci., 17, 4031–4042.

Floodplains have been intensively altered in industrialized countries, but [...]

01.07.14

Evaluating evolutionary models of stress-induced mutagenesis in bacteria

Clara Torres-Barceló published a review paper in Nature Reviews Genetics on hypothesis aiming to explain the evolutionary importance of stress-induced mutagenesis in bacteria.

MacLean RC, Torres-Barceló C., Moxon R.E. (2013). Evaluating evolutionary models of stress-induced mutagenesis in bacteria. Nature Reviews Genetics 14, 221-227.

Increased mutation rates under stress allow bacterial populations to adapt rapidly to stressors, including antibiotics. Here we evaluate [...]

10.01.13

Sustaining ecosystem functions in a changing world

Sonia Kéfi and colleagues published an article in Journal of Applied Ecology discussing how integrating two lines of research in ecology – biodiversity–ecosystem function (BDEF) and ecological resilience (ER) – may foster a deeper understanding of human-impacted ecosystems.

Tomimatsu, H., T. Sasaki, H. Kurokawa, J.R. Bridle, C. Fontaine, J. Kitano, D.B. Stouffer, M. Vellend, T.M. [...]