Lawrence A. Kapustka is Senior Ecologist/Ecotoxicologist for LK Consultancy. He has published extensively on risk assessment methods, ecotoxicology, and ecology. He is a member of ASTM International, Ecological Society of America (ESA), Society of Risk Analysis, and Society of Environmental Toxicology and Chemistry (past chair for Ecological Risk Assessment Advisory Group). He serves on the Science Committee of ESA and editorial boards of several societies. Wayne G. Landis is Director and Professor of the Institute of Environmental Toxicology at Western Washington University. He has published extensively and is a Fellow of the Society for Risk Analysis and a member of the Society of Environmental Toxicology and Chemistry. Dr. Landis is also an area editor for environmental risk assessment for Risk Analysis and is a Founding Editor of Integrated Environmental Assessment and Management. Currently, he is serving on the EPA Science Advisory Boards for Ecological Processes and Effects and Science Integration for Decision Making.