My field of research concerns the design and development of modelling techniques to simulate the dynamics of ecological systems. I study complexe systems described by a large number of variables and governed by processes that are strongly non-linear. My work includes also the characterization of the mathematical properties of these dynamic models as analogues for the dynamic properties of the systems I study. After having formulated and validated the first dynamic model that simulates specifically the dynamics of microphytobenthos, I focuss now on designing unified population dynamic model for marine community. I apply these approaches to the quantification of the dynamic of inter-connected marine metacommunities. This thematic is important in order to understand and preserve marine biodiversity.