My research focuses on the description of biodiversity, on understanding the mechanisms at the origin of this biodiversity and on its maintenance over time at the scale of species and populations. I therefore work on the spatial and temporal dynamics of biodiversity by relying on traditional (genetic) and next generation (genomics & environmental DNA) sequencing technologies. In the context of an unprecedented biodiversity crisis, the use of the molecular tool makes it possible to identify essential areas of conservation and to assess populations connectivity and the determinants of species assemblages. (e.g. environment, connectivity). I am particularly interested in tropical freshwater and marine fishes, which led me to work on projects related to different biodiversity hotspots, in the South Pacific (French Polynesia, Easter Island), South America, Indonesia and Africa.