An Introduction to Ecological Impact Assessment: Principles and Goals:C.W. Osenberg and R.J. Schmitt, Detecting Ecological Impacts Caused by Human Activities.A. Stewart-Oaten, Goals in Environmental Monitoring.G.P. Jones and U.L. Kaly, Criteria for Selecting Marine Organisms in Biomonitoring Studies.S.F. Thrush, R.D. Pridmore, and J.E. Hewitt, Impacts on Soft-Sediment Macrofauna: The Effects of Spatial Variation on Temporal Trends.B.D. Mapstone, Scalable Decision Criteria for Environmental Impact Assessment: Effect, Size, Type I, and Type II Errors. Improving Field Assessments of Local Impacts: Before-After-Control-Impact Designs:C.W. Osenberg, R.J. Schmitt, S.J.Holbrook, K.E. Abu-Saba, and A.R. Flegal, Detection of Environmental Impacts: Natural Variability, Effect Size and Power Analysis.A. Stewart-Oaten, Problems in the Analysis of Environmental Monitoring Data.J.R. Bence, A. Stewart-Oaten, and S.C. Schroeter, Estimating the Size of an Effect from Before-After-Control-Impact-Pairs Design: The Predictive Approach Applied to a Power Plant Study.A.J. Underwood, On Beyond BACI: Sampling Designs That Might Reliably DetectEnvironmental Disturbances.Extension of Local Impacts to Larger Scale Consequences:P.T. Raimondi and D.C. Reed, Determining the Spatial Extent of Ecological Impacts Caused by Local Anthropogenic Disturbances in Coastal Marine Habitats.M.J. Keough and K.P. Black, Predicting the Scale of Marine Impacts: Understanding Planktonic Links between Populations.M.J. Kingsford and C.A. Gray, Influence of Pollutants and Oceanography on Abundance and Deformities of Wild Fish Larvae.R.M. Nisbet, W.W. Murdoch, and A. Stewart-Oaten, Consequences for Adult Fish Stocks of Human-Induced Mortality on Immatures.The Link between Administrative Environmental Impact Studies and Well-Designed Field Assessments:R.J. Schmitt, C.W. Osenberg, W.J. Douros, and J. Chesson, The Art and Science of Administrative Environmental Impact Assessment.R.S. Carney, On the Adequacy and Improvement of Marine Benthic Pre-Impact Surveys: Examples from the Gulf of Mexico Outer Continental Shelf.F.M. Piltz, Organization Constraits on Environmental Impact Assessment Research.C. Lester, Administrative, Legal, and Public Policy Constraints on Environmental Impact Assessment.R.F. Ambrose, R.J. Schmitt, and C.W. Osenberg, Predicted and Observed Environmental Impacts: Can We Foretell Ecological Change?Glossary.Author Index.Subject Index.