Colbert E. Cushing, formerly at the Ecosystems Department of Batelle Pacific NW Laboratories, is affiliated with Streamside Programs in Estes Park, Colorado. His books include Streams: Their Ecology and Life (2001, coauthored with J.D. Allan). Kenneth W. Cummins is Co-director of the Institute for River Ecosystems and Adjunct Professor in the Department of Fisheries Biology at Humboldt State University. His books include An Introduction to the Aquatic Insects of North America (third edition, 1996, coedited with R.W. Merritt). G. Wayne Minshall is Professor Emeritus of Ecology at Idaho State University. Among his books is Stream Ecology (1995, coedited with J.R. Barnes).