This paper describes a new approach using decision support GIS for handling information in ecosystem management. Technical research efforts resulted in specialized spatial decision support systems for wetland restoration planning, wetland permit analysis, and wildlife research and management. These applications are briefly presented to illustrate the usage of the methodology. With its powerful capabilities in information synthesis, analytical visualization, and spatial simulation and modeling, the decision support GIS provided cost-effective technical tools and a conceptual framework for integrating natural resource management with an ecosystem approach.