I. Resource Management Information Systems.- 1. Introduction.- 2. The Needs of Resource Management and Land Management Planning.- 3. Review of Some Methods, Information Systems, and Models.- Modeling and Simulation.- Community Stratification and Abstraction.- Storage and Retrieval of Vegetation Information.- Sources of Vegetation Information.- Accuracy and Resolution.- Fuel and Fire Modeling.- Animal Habitat Modeling.- Succession Modeling.- Simulation as a Managerial Tool.- Integrated Systems.- II. The Glacier National Park Study.- 4. Introduction to Glacier National Park.- Ecology.- Geology, Geomorphology, and Climate.- 5. Overview of Glacier's Terrestrial Communities.- Factors Important in Terrestrial Community Development.- The Special Role of Fire.- 6. Field Methodology.- Vegetation Sampling.- Fuel Sampling.- Shrub Dimension Analysis.- Fuel Moisture and Microclimate Study.- False-Color Infrared Aerial Photography.- Fire Behavior Monitoring.- 7. Analytical Methodology.- Vegetation and Fuels Data Tabulation.- Gradient Analysis.- 8. The Gradient Model.- Elevation Gradient.- Time Since Burn Gradient.- Topographic-Moisture Gradient.- Drainage Area (Lake Influence) Gradient.- Primary Succession Gradient.- Alpine Wind-Snow Exposure Gradient.- Categories of Disturbance and Variation.- 9. Forest Communities.- Distribution of Tree Species.- Distribution of Important Herb and Shrub Species.- Distribution of Ground Fuels.- 10. Forest Successions.- Modeling Succession in Glacier.- Application of the Multiple-Pathway Model.- Implications for, and a Comment on, Park Management.- 11. Other Terrestrial Communities.- The Role of Primary Succession.- Distributions of Important Herb and Shrub Species.- The Role of Fire.- Other Causes of Secondary Successions.- Distribution of Ground Fuels.- 12. Diversity Relationships.- The Diversity Mosaic.- Dominance-Diversity Relationships.- Evolution of Glacier's Terrestrial Plant Community Diversity.- III. Implementation of the Glacier National Park Gradient Modeling Information System.- 13. Gradient Models as the Base for a Dynamic Information System.- A Review of the Data Base.- The Gradient Modeling Information System.- 14. Structure and Components of the Resource and Fire Model.- Terrestrial Resource Inventory (Remote Site Inventory).- Weather Models.- Fire Behavior Models.- Integration of the Model's Components.- 15. Testing the Model.- Site Information.- Vegetation.- Fuel Loadings.- Fire Behavior.- 16. Model Computer Program, Operation, and Utility.- Source Program and File Structure.- Operation of the Model.- Output from the Model.- IV. Subsequent Applications of Gradient Modeling Systems.- 17. Gradient Models and Multiple Resolution Levels.- Management Information Systems.- Fire Behavior Information Integration System.- Fire Management Information Integration System.- GANDALF and TAROT.- Other Related Work.- 18. Models of Vertebrate Habitat Utilization.- Gradient Models of Ungulates.- Vertebrate Habitat Utilization Model.- 19. The Next Generation of Gradient Modeling Systems: FORPLAN and PREPLAN.- Structure of the Language.- FORPLAN Modules.- FORPLAN as a Managerial Tool.- Continued Development and Availability of FORPLAN.- PREPLAN, The Kosciusko National Park Model.- 20. Conclusions - Technology Transfer Between Researchers and Managers.- Literature Cited.- Appendix 1. Scientific and Common Names For Species Mentioned In The Text.- Appendix 2. Gradient Population Nomograms For Glacier National Park.