Bioeconomic approach and integrated management of wetlands.

Summary The purpose of this thesis is to ask how to improve the management of wetlands and associated goods/services. By integrating multidisciplinary knowledge into management models, we study economics as a tool for the service of Man and Nature. We propose to improve the management of wetlands by combining an economic approach with a biological approach in order to be able to account for the complexity of these environments in economic models. To do this, we base this thesis on the study of the ecosystem functions provided by wetlands, which are the habitat, production and regulation functions. The habitat function is addressed through the issue of the accessibility of wetlands in the Gironde Estuary to migratory fish species. The production function, closely linked to the habitat function, is studied through a theoretical model of the sharing of a wetland between fish production and agricultural production. Finally, we deal with the regulation function by integrating this function into a program to encourage the reduction of agricultural pollutants and the restoration of wetlands.