The Dynamics and Use of Lacustrine Ecosystems: Proceedings of the 40-Year Jubilee Symposium of the Finnish Limnological Society, held in Helsinki, Finland, 6–10 August 1990

Front Matter....Pages i-ix
Trends in Finnish limnology during 1940–1989....Pages 1-19
Clean water: a fading resource....Pages 21-30
Uses, abuses and management of lakes and rivers....Pages 31-45
Extracellular enzymes in a small polyhumic lake: origin, distribution and activities....Pages 47-59
Significance of bacterial ectoenzymes in aquatic environments....Pages 61-70
Kinetics of amino acids mineralization by a pond sediment bacterial community....Pages 71-77
Microbial ecology of planktonic filamentous phototrophic bacteria in holomictic freshwater lakes....Pages 79-86
Population dynamics of phototrophic bacteria in three basins of Lake Banyoles (Spain)....Pages 87-94
Estimating photosynthetically available radiation into open and ice-covered freshwater lakes from surface characteristics; a high transmittance case study....Pages 95-104
Phosphorus transformations in the epilimnia of small humic forest lakes....Pages 105-111
Differential luxury phosphate response of planktonic algae to phosphorus removal....Pages 113-118
Temporal changes in biomass specific photosynthesis during the summer: regulation by environmental factors and the importance of phytoplankton succession....Pages 119-135
Spatial changes of phytoplanktonic size spectra in Lake Biwa....Pages 137-140
Phytoplankton and submerged macrophytes in the aquatic ecosystems of the Danube Delta during the last decade....Pages 141-146
Phytoplankton and zooplankton community structure after nutrient additions to the oligotrophic Lake Hecklan, Sweden....Pages 147-155
Respiratory electron transport system (ETS) — activity of the plankton and sediment in Lake Balaton (Hungary)....Pages 157-166
Population dynamics of Bosmina longirostris (Crustacea: Cladocera) in Lake Kariba, Zimbabwe....Pages 167-173
Plankton ecology in an ice-covered bay of Lake Michigan: utilization of a winter phytoplankton bloom by reproducing copepods....Pages 175-183
The role of zoobenthos in energy flow in deep, oligotrophic Lake Thingvallavatn, Iceland....Pages 185-195
Life history of Corophium curvispinum G. O. Sars (Crustacea, Amphipoda) living on macrophytes in Lake Balaton....Pages 197-202
Experimental estimation of the food intake of larval vendace ( Coregonus albula L.) under field conditions....Pages 203-209
Food, growth, habitat, and community interactions of young-of-the-year burbot, Lota lota L., in a Precambrian Shield lake....Pages 211-227
The response of burbot ( Lota lota ) to change in lake trout ( Salvelinus namaycush ) abundance in Lake Opeongo, Ontario....Pages 229-235
Demography of spawning grayling ( Thymallus arcticus ) in the Beaverlodge River, Alberta....Pages 237-247
An evaluation of the quality of fall-fingerling Atlantic salmon ( Salmo salar L.) released to natural lacustrine nursery areas in Newfoundland, Canada....Pages 249-259
Trophic state and its implications for natural reproduction of salmonid fish....Pages 261-268
Ecological release in feeding behaviour: the case of bluegills in Japan....Pages 269-276
Whitefish stocking in acidified lakes: ecological and physiological responses....Pages 277-282
Can ecological theory be used to improve water quality?....Pages 283-291
Indirect effects of fish community structure on submerged vegetation in shallow, eutrophic lakes: an alternative mechanism....Pages 293-301
Regulation of the development and species dominance of summer phytoplankton in Lake Vesijärvi: predictability of enclosure experiments....Pages 303-310
Effects of fish density on planktonic communities and water quality in a manipulated forest pond....Pages 311-321
Impacts of bleak ( Alburnus alburnus ) and roach ( Rutilus rutilus ) on water quality, sedimentation and internal nutrient loading....Pages 323-331
Lacustrine profundal meiobenthos as an environmental indicator....Pages 333-340
Mass balance models for elongated lakes....Pages 341-349
Transport processes in a sound of a large lake....Pages 351-357
The benthic boundary layer approach and its application to Lake Päijänne, Finland....Pages 359-369
Interpretation of mixed sediment profiles by means of a sediment-mixing model and radioactive fallout....Pages 371-379
Evaluation of a model-based method for designing water quality observations....Pages 381-387
The effects of reduced phosphorus and nitrogen loading on phytoplankton in Mondsee, Austria....Pages 389-394
Changes in water quality in Lake Päijänne following decrease of effluent load from the pulp and paper industry in 1969–1989....Pages 395-403
Reproductive success of Coregonus species in areas loaded by effluents from paper mills....Pages 405-412
Effects of paper mill effluents on the fish fauna of stony shores of Lake Päijänne....Pages 413-420
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....Pages 421-434
The conservation status of athalassic lakes in New South Wales, Australia....Pages 435-444
Effects of waterfowl on water quality....Pages 445-448
Organic matter in the River Krutynia (Masurian Lakeland, Poland)....Pages 449-456
Effects of forest clear-cutting and soil disturbance on the biology of small forest brooks....Pages 457-464
The effects of forest clear-cutting and scarification on the water quality of small brooks....Pages 465-473
Total organochlorine and organobromine in Finnish water courses....Pages 475-479
Concluding remarks I. Limnology now and in the future....Pages 481-485
Concluding remarks II. A Finnish perspective....Pages 487-488
Back Matter....Pages 489-498