| Preface | |
| Trends in Finnish limnology during 1940-1989 | p. 1 |
| Clean water: a fading resource | p. 21 |
| Uses, abuses and management of lakes and rivers | p. 31 |
| Extracellular enzymes in a small polyhumic lake: origin, distribution and activities | p. 47 |
| Significance of bacterial ectoenzymes in aquatic environments | p. 61 |
| Kinetics of amino acids mineralization by a pond sediment bacterial community | p. 71 |
| Microbial ecology of planktonic filamentous phototrophic bacteria in holomictic freshwater lakes | p. 79 |
| Population dynamics of phototrophic bacteria in three basins of Lake Banyoles (Spain) | p. 87 |
| Estimating photosynthetically available radiation into open and ice-covered freshwater lakes from surface characteristics; a high transmittance case study | p. 95 |
| Phosphorus transformations in the epilimnia of small humic forest lakes | p. 105 |
| Differential luxury phosphate response of planktonic algae to phosphorus removal | p. 113 |
| Temporal changes in biomass specific photosynthesis during the summer: regulation by environmental factors and the importance of phytoplankton succession | p. 119 |
| Spatial changes of phytoplanktonic size spectra in Lake Biwa | p. 137 |
| Phytoplankton and submerged macrophytes in the aquatic ecosystems of the Danube Delta during the last decade | p. 141 |
| Phytoplankton and zooplankton community structure after nutrient additions to the oligotrophic Lake Hecklan, Sweden | p. 147 |
| Respiratory electron transport system (ETS) - activity of the plankton and sediment in Lake Balaton (Hungary) | p. 157 |
| Population dynamics of Bosmina longirostris (Crustacea: Cladocera) in Lake Kariba, Zimbabwe | p. 167 |
| Plankton ecology in an ice-covered bay of Lake Michigan: utilization of a winter phytoplankton bloom by reproducing copepods | p. 175 |
| The role of zoobenthos in energy flow in deep, oligotrophic Lake Thingvallavatn, Iceland | p. 185 |
| Life history of Corophium curvispinum G. O. Sars (Crustacea, Amphipoda) living on macrophytes in Lake Balaton | p. 197 |
| Experimental estimation of the food intake of larval vendace (Coregonus albula L.) under field conditions | p. 203 |
| Food, growth, habitat, and community interactions of young-of-the year burbot, Lota lota (Linn.), in a Precambrian Shield lake | p. 211 |
| The response of burbot (Lota lota) to change in lake trout (Salvelinus namaycush) abundance in Lake Opeongo, Ontario | p. 229 |
| Demography of spawning grayling (Thymallus arcticus) in the Beaverlodge River, Alberta | p. 237 |
| An evaluation of the quality of fall-fingerling Atlantic salmon (Salmo salar L.) released to natural lacustrine nursery areas in Newfoundland, Canada | p. 249 |
| Trophic state and its implications for natural reproduction of salmonid fish | p. 261 |
| Ecological release in feeding behaviour: the case of bluegills in Japan | p. 269 |
| Whitefish stocking in acidified lakes: ecological and physiological responses | p. 277 |
| Can ecological theory be used to improve water quality? | p. 283 |
| Indirect effects of fish community structure on submerged vegetation in shallow, eutrophic lakes: an alternative mechanism | p. 293 |
| Regulation of the development and species dominance of summer phytoplankton in Lake Vesijarvi: predictability of enclosure experiments | p. 303 |
| Effects of fish density on planktonic communities and water quality in a manipulated forest pond | p. 311 |
| Impacts of bleak (Alburnus alburnus) and roach (Rutilus rutilus) on water quality, sedimentation and internal nutrient loading | p. 323 |
| Lacustrine profundal meiobenthos as an environmental indicator | p. 333 |
| Mass balance models for elongated lakes | p. 341 |
| Transport processes in a sound of a large lake | p. 351 |
| The benthic boundary layer approach and its application to Lake Paijanne, Finland | p. 359 |
| Interpretation of mixed sediment profiles by means of a sediment-mixing model and radioactive fallout | p. 371 |
| Evaluation of a model-based method for designing water quality observations | p. 381 |
| The effects of reduced phosphorus and nitrogen loading on phytoplankton in Mondsee, Austria | p. 389 |
| Changes in water quality in Lake Paijanne following decrease of effluent load from the pulp and paper industry in 1969-1989 | p. 395 |
| Reproductive success of Coregonus species in areas loaded by effluents from paper mills | p. 405 |
| Effects of paper mill effluents on the fish fauna of stony shores of Lake Paijanne | p. 413 |
| The eutrophication of shallow coastal lakes in southwest England - understanding and recommendations for restoration, based on palaeolimnology, historical records, and the modelling of changing phosphorus loads | p. 421 |
| The conservation status of athalassic lakes in New South Wales, Australia | p. 435 |
| Effects of waterfowl on water quality | p. 445 |
| Organic matter in the River Krutynia (Masurian Lakeland, Poland) | p. 449 |
| Effects of forest clear-cutting and soil disturbance on the biology of small forest brooks | p. 457 |
| The effects of forest clear-cutting and scarification on the water quality of small brooks | p. 465 |
| Total organochlorine and organobromine in Finnish water courses | p. 475 |
| Concluding remarks I. Limnology now and in the future | p. 481 |
| Concluding remarks II. A Finnish perspective | p. 487 |
| Subject index | p. 489 |
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