K. Elaine Hoagland is executive director of the Association of Systematics Collections. Her work has focused on population genetics and dynamics of marine invertebrates, molluscan systematics, and science policy. She has served on many advisory bodies on environmental issues and questions concerning systematics and collections.

Crawford S. Holling is Arthur R. Marshall Professor in Ecological Sciences and Eminent Scholar at the University of Florida, Gainesville. His research is on systems ecology, population dynamics, and ecologic policy analysis. He is a fellow of the Royal Society of Canada.

Theodore L. Hullar is chancellor at the University of California, Davis and professor of environmental toxicology. He has served as deputy commissioner of the New York Environmental Conservation Commission and as research director at the Cornell University Agricultural Research Station. He is the chairman of the National Research Council Board on Agriculture. His research interests include biochemistry, environmental toxicology, agriculture, and environmental policy.

Allen V. Kneese is an economist and senior fellow in the Quality of the Environment Division of Resources for the Future, Inc., and on adjunct professor at the University of New Mexico, Albuquerque. He has conducted research on the economics of water resources and is a recipient of the Volvo Prize for the Environment.

Kai N. Lee is director and professor of environmental studies at Williams College. He has worked at the Office of Technology Assessment and with numerous bodies studying a variety of environmental issues. His research interests include energy and environmental policy and politics, regional power development, fish and wildlife, nuclear-waste management, and environmental conflict and dispute settlement.

Simon A. Levin is George Moffett Professor of Biology in the Department of Ecology and Evolutionary Biology of Princeton University and Charles A. Alexander Professor of Biological Sciences at Cornell University. His research spans both theoretical and applied ecology ranging from modeling of ecosystem dynamics to the interface between science and policy. He is a past president of the Ecological Society of America and of the Society for Mathematical Biology.