Hybrid and Hierarchic Compartmental Approach for Ecosystem Applied to Estuaries Modelisation

This paper deals with aquatic ecosystem model in estuaries context. These systems are described with functional organizations which are producers, consumers and decomposers. We use a hierarchical representation which is based on compartmental model. The different compartments exchange various fluxes of their global components, like oxygen for example, as well as fluxes of population individuals, like fishes for example. We propose an hybrid approach based on a mixed formulation, equation based model for global components of compartments and individual-based models for living entities. We show experiments developed in an agentbased simulation, using the Madkit platform (Gutknecht and Ferber, 1997).