Hi, I'm Youn Henry.

I'm a biologist specialized in ecology and evolution. The central point of my work consists in understanding why and how organisms can cope with their ever-changing environment, with a special focus on stressful thermal conditions and host-microbes interactions.

During my PhD, I worked on nutrition-microbiota interaction, and how this interaction affects several aspects of stress tolerance in fruit flies. Afterwards, I worked on the aphid x facultative symbionts x parasitoid wasps tripartite interaction, focusing on ecological and evolutionary aspects.

Currently, my work primarily aims to study the evolution process of bacteria shifting from free-living to host-associated lifestyles, using Drosophila melanogaster as a model. The idea here is to investigate which bacterial functions could be involved in arising mutualistic interactions, and how these functions depend on the environmental conditions of the host. A second aspect of my research focuses on adaptive potential of the microbiota for its host. In particular, I ask whether the evolution of the host to an environmental constraint may also encompass durable changes in the microbiota community, either in the species composition or in the genetic characteristics of the microbiota.