Foreword.--Preface.--List of participants and contributors.-- 1. Introduction / S.R. Carpenter and J.F. Kitchell. PATTERNS AND SURPRISES IN LAKE FOOD WEBS. 2. Tropic dynamics and development of freshwater pelagic food webs / E.L. Mills and J.L. Forney. 3. Complex interactions in oligotrophic lake food webs: Responses to nutrient enrichment / W.E. Neill. 4. Predator regulation and primary production along the productivity gradient of temperate lake ecosystems / L. Persson, G. Andersson, S.F. Hamrin, and L. Johansson. MICROBIAL LINKS TO THE CLASSICAL FOOD WEB. 5. Microbial food webs in freshwater planktonic ecosystems / J.G. Stockner and K.G. Porter. 6. From picoplankton to fish: Complex interactions in the Great Lakes / D. Scavia and G.L. Fahnenstiel. MULTIPLE CASUALITY AND TEMPORAL PATTERN IN LAKE ECOSYSTEMS. 7. Temporal variation in regulation of production in a pelagic food web model / S.M. Bartell, A.L. Brenkert, R.V. O'Neill, and R.H. Gardner. 8. Transmission of variance through lake food webs / S.R. Carpenter. REPORTS FROM GROUP DISCUSSIONS. 9. Goals of the discussion groups / S.R. Carpenter, J.F. Kitchell, W.E. Neill, D. Scavia, and E.E. Werner. 10. Food web interactions in lakes / L.B. Crowder, R.W. Drenner, W.C. Kerfoot, D.J. McQueen, E.L. Mills, U. Sommer, C.N. Spencer, and M.J. Vanni. 11. Size-structured interactions in lake communities / R.A. Stein, S.T. Threlkeld, C.D. Sandgren, W.G. Sprules, L. Persson, E.E. Werner, W.E. Neill, and S.I. Dodson. 12. Spatial heterogeneity and habitat interactions in lake communities / D.M. Lodge, J.W. Barko, D. Strayer, J.M. Melack, G.G. Mittelbach, R.W. Howarth, B. Menge, and J.E. Titus. 13. Microbial interactions in lake food webs / K.G. Porter, H. Paerl, R. Hodson, M. Pace, J. Priscu, B. Riemann, D. Scavia, and J. Stockner. 14. Scale in the design and interpretation of aquatic community research / T.M. Frost, D.L. DeAngelis, S.M. Bartell, D.J. Hall, and S.H. Hurlbert. SYNTHESIS. 15. Goals of the synthesis groups / S.R. Carpenter. 16. Epistemology, experiments, and pragmatism / J.F. Kitchell, S.M. Bartell, S.R. Carpenter, D.J. Hall, D.J. McQueen, W.E. Neill, D. Scavia, and E.E. Werner.--Index.