hydrobiologia volume 224 (1991), contents No. 1 A. Banderas, R. Gonzalez-Villela & G. de la Lanza: Limnological aspects of a high-mountain lake in Mexico D. G. Frey: A new genus of alonine chydorid cladocerans from athalassic saline waters of New South Wales, Australia S. R. Rushforth & J. T. Brock: Attached diatom communities from the lower Truckee River, summer and fall, 1986 No. 2 R. Wagner: The influence of the diel activity pattern of the larvae of Sericostoma personatum (Kirby & Spence) (Trichoptera) on organic matter distribution in stream-bed sediments — a laboratory study G. E. Fenton: Description of Antichthomysis notidana n.g. n.sp. from southern Tasmania. (Crustacea: Mysidacea: Leptomysini) M. A. Ahrens & R. H. Peters: Plankton community respiration: relationships with size distribution and lake trophy J. R. Beaver & T. L. Crisman: Temporal variability in algal biomass and primary productivity in Florida lakes relative to latitudinal gradients, organic color and trophic state J. Rosenfeld & J. C. Roff: Primary production and potential availability of autochthonous carbon in southern Ontario streams E. G. Balseiro, C. P. Queimalifos & B. E. Modenutti: Evidence of interference of Asterionella formosa with the feeding of Bosmina longirostris: a field study in a south Andes lake A. J. Temple, B. R. Murphy & E. F. Cheslak: Effects of Tebuthiuron on aquatic productivity No. 3 P. A. del Giorgio, A. L. Vinocur, R. J. Lombardo & H. G. Tell: Progressive changes in the structure and dynamics of the phytoplankton community along a pollution gradient in a lowland river — a multivariate approach R. L. Crunkilton & R. M. Duchrow: Use of stream order and biological indices to assess water quality in the Osage and Black river basins of Missouri C. M. Raubenheimer & J. A. Day: /n vitro leaching of two sclerophyllous fynbos plants I. S. A. Nather Khan: Effect of urban and industrial wastes on species diversity of the diatom community in a tropical river, Malaysia A. R. Russo, Do predatory fishes affect the structure of an epiphytal amphipod assemblage on a protected alga! reef in Hawaii? hydrobiologia volume 224 (1991), author index Ahrens, M. A., 77 del Giorgio, P. A., 129 Queimalifios, C. P., 111 Balseiro, E. G., 111 Duchrow, R. M., 155 Raubenheimer, C. M., 167 Banderas, A., 1 Fenton, G. E., 71 Roff, J. C., 99 Beaver, J. R., 89 Frey, D. G., 11 Rosenfeld, J., 99 Brock, J. T., 49 Gonzalez-Villela, R., 1 Rushforth, S. R., 49 Cheslak, E. F., 117 Lombardo, R. J., 129 Russo, A. R., 185 Crisman, T. L., 89 Modenutti, B. E., 111 Tell, H. G., 129 Crunkilton, R. L., 155 Murphy, B. R., 117 Temple, A. J., 117 Day, J. A., 167 Nather Khan, I. S. A., 175 Vinocur, A. L., 129 de la Lanza, G., 1 Peters, R. H., 77 Wagner, R., 65