Lakes and Water Management: Proceedings of the 30 Years Jubilee Symposium of the Finnish Limnological Society, held in Helsinki, Finland, 22–23 September 1980 (Developments in Hydrobiology, 7)

Multiple use of natural waters and watersheds poses many practical problems, some of which are clearly limnological, relating for example to carrying capacities oflakes, deterioration of water quality and fisheries management. It is thus important to consider limnological aspects when making decisions in the field of water management. To further this attitude the Finnish Limnological Society considered 'Lakes and Water Management' to be a suitable theme for the Society's Jubilee Symposium, held in Helsinki on 22-23 September, 1980 at the Viikki Campus of the University of Helsinki, to mark the Society's 30th Anniversary. The Finnish Limnological Society has arranged nationallimnological symposia everyone or two years. The papers presented at these symposia have been published in the series 'Limnologisymposion' (in Finnish or Swedish, with short summaries in an internationally spoken language). Due to financial difficulties, the series was terminated as of the symposium in 1979. When preparing the 30th Anniversary of the Finnish Limnological Society, the Governing Board of the Society decided to arrange an international symposium on a theme relevant to modern limnology both in Finland and elsewhere. The selected results of the successful meeting on lakes and water management, which was attended by 220 people from 7 countries, are presented in this volume. Front Matter....Pages I-IX The first half century of limnology in Finland....Pages 1-7 Front Matter....Pages 9-9 Dynamics of phytoplankton in Finnish lakes....Pages 11-20 Dispersion patterns of phytoplankton in lakes....Pages 21-28 On the annual variation of phytoplankton biomass in Finnish inland waters....Pages 29-31 Dynamics of phytoplankton in the brackish-water inlet Pojoviken, southern coast of Finland....Pages 33-39 Carbon, phosphorus and nitrogen budgets of the littoral Equisetum belt in an oligotrophic lake....Pages 41-53 The diversity, biomass and production of zooplankton in Lake Inarijärvi....Pages 55-59 The food and parasites of fish in some deep basins of northern L. Päijänne....Pages 61-65 Size and structure of crayfish (Astacus astacus) populations on different habitats in Finland....Pages 67-72 Seasonal and spatial distribution of humus fractions in a chain of polyhumic lakes in southern Finland....Pages 73-80 The role of nitrogen as a growth limiting factor in the eutrophic Lake Vesijärvi, southern Finland....Pages 81-85 Seasonal succession of phytoplankton in an ice-free pond warmed by a thermal power plant....Pages 87-91 The annual flood regime as a regulatory mechanism for phytoplankton production in Kainji lake, Nigeria....Pages 93-97 The effect of land use on the diatom communities in lakes....Pages 99-103 Convection in bottom sediments and its role in material exchange between water and sediments....Pages 105-108 Winter microbial activity in Lake Tuusulanjärvi....Pages 109-113 The influence of sulphite mill effluents on heterotrophic activity as measured by glucose assimilation....Pages 115-119 Establishing the pattern of heterotrophic bacterial activity in three Central Amazonian lakes....Pages 121-126 Front Matter....Pages 127-127 Nutrient dependence of phytoplankton production in brown-water lakes with special reference to Lake Päijänne....Pages 129-132 An oxygen model for Lake Haukivesi....Pages 133-139 Front Matter....Pages 141-141 Limnological research can improve and reduce the cost of monitoring and control of water quality....Pages 143-146 The limnological basis for planning water quality management....Pages 147-151 The phosphorus economy of a hypertrophic seepage lake in Scania, south Sweden groundwater influence....Pages 153-158 Changes in quality of Finnish inland waters revealed by grouping analysis....Pages 159-160 Muddy odour: a problem associated with extreme eutrophication....Pages 161-164 Factors influencing odour production by actinomycetes....Pages 165-170 Faecal indicator bacteria at fish farms....Pages 171-175 Goals, methods and possibilities for directing development of limnic ecosystems....Pages 177-183 Changes in the phytoplankton of Lake Trummen induced by restoration....Pages 185-193 The recovery of L. Vesijärvi following sewage diversion....Pages 195-199 Experimental manipulations of the fish populations in Windermere....Pages 201-205 The management of fisheries in Lake Vörtsjärv....Pages 207-210 A plan for fisheries management in the lakes drained by the Oulujoki river....Pages 211-217 Fish stock assessments in Lake Konnevesi....Pages 219-222 Proceedings of the 30 Years Jubilee Symposium of the Finnish Limnological Society Held in Helsinki, Finland, September 22-23, 1980.