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This book contains 11 papers that review the extant information about the Colorado River from an ecosystem perspective and serve as the basis for discussion of the use of ecosystem/earth science information for river management and dam operations. It also contains a synopsis of the committee's findings and recommendations to the Bureau of Reclamation as the agency seeks to change its direction to the management of natural resources.Table of Contents Front Matter Committee Synopsis/Findings and Recommendations The Law and Politics of the Operation of Glen Canyon Dam The Role of Science in Natural Resource Management: The Case fr theColorado River Hydrology of Glen Canyon and the Grand Canyon Sediment Transport in the Colorado River Basin Limnology of Lake Powell and the Chemistry of the Colorado River Algal and Invertebrate Biota in the Colorado River: Comparison ofPre- and Post-Dam Conditions Native Fishes of the Grand Canyon Region: An Obituary? Historic Changes in Vegetation Along the Colorado River in theGrand Canyon Reservoir Operations A Brief History of the Glen Canyon Environmental Studies Glen Canyon Environmental Studies Research Program: Past, Present,and Future Closing Remarks Appendix A: Symposium Program Appendix B: Biographical Sketches of Committee Members Appendix C: Symposium Invitees Appendix D: Glen Canyon Environmental Studies Technical Reports