DAVID L. PETERSON is a research biologist with the U.S. Geological Survey Forest and Rangeland Ecosystem Science Center and professor in the College of Forest Resources at the University of Washington. He is coeditor with D. R. Johnson of Human Ecology and Climate Change: People and Resources in the Far North, and with C. V. Klimas of The Role of Restoration in Ecosystem Management.
V. THOMAS PARKER is professor of biology at San Francisco State University. He is coeditor, with M. A. Leck and R. L. Simpson, of Ecology of Soil Seed Banks.