The place of epicontinental waters in global ecology, R. Margalef; phytoplankton - which, and how much?, J. Capblancq and J. Catalan; prokaryotology for the limnologist, C. Pedros-Alio and R. Guerrero; macrophytes, taking control of an ancestral home, C.M. Duarte et al; interannual variability in limnic ecosystems - origin, patterns, and predictability, J. Catalan and E.J. Fee; transport processes in lakes - a review, J. Imberger; the structure and dynamics of lotic ecosystems, J.V. Ward; the tamed river, N. Prat and J.V. Ward; seasonal rhythm and secular changes in Spanish reservoirs, J. Armengol et al; chemical composition of lakes in crystalline basins - a combination of atmospheric deposition, geological background, biological activity and human action, R. Psenner and J. Catalan; the high north - present and perspectives, D. Planas; tropical South America - present and perspectives, J.G. Tundisi; austral rivers of South America, A.A. Bonetto; parched continents - our common future?, F.A. Comin and W.D. Williams; not politics, but ecology, J.R. Vallentyne; what is limnology?, W.T. Edmondson.