Richard Marie Servajean

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Evolution is the process by which organisms are modified over time. The fundamental mechanisms underlying evolution are mutations, natural selection and genetic drift. While natural selection favors fitter individuals, genetic drift, which arises from fini ...

Owing to stochastic fluctuations arising from finite population size, known as genetic drift, the ability of a population to explore a rugged fitness landscape depends on its size. In the weak mutation regime, while the mean steady-state fitness increases ...

The bacterial type VI secretion system (T6SS) is a widespread, kin-discriminatory weapon capable of shaping microbial communities. Due to the system’s dependency on contact, cellular interactions can lead to either competition or kin protection. Cell-to-ce ...

We study how rugged fitness landscapes are explored by spatially structured populations with demes on the nodes of a graph, connected by migrations. In the weak mutation and rare migration regime, we find that, in most landscapes, migration asymmetries ass ...

Richard Marie Servajean

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Impact of spatial structure and finite size on the evolution and ecology of asexual microbial populations

Impact of population size on early adaptation in rugged fitness landscapes

Interactions between pili affect the outcome of bacterial competition driven by the type VI secretion system

Impact of complex spatial population structure on early and long-term adaptation in rugged fitness landscapes