Franck Lagarde, holder of a doctorate in Marine Biology and Ecology from Sorbonne-Université. He was recruited in 2001 at Ifremer and currently works in the joint MARBEC based at the Ifremer station in Sète. Franck Lagarde supports Mediterranean coastal society in the context of global change through research, observation, experimentation and innovation. He studies the functioning of fluctuating or disturbed Mediterranean coastal and lagoon ecosystems. In recent years, the major topics addressed by Franck Lagarde have focused on the development of knowledge related to the reproduction and recruitment of native cupped oysters in Mediterranean lagoons, the emergence of pathogens and the ecological responses of lagoon ecosystems exploited by shellfish farming in the face of extreme hydroclimatic events (phenomenon of green water in Picochlorum in 2019).