The First International Lake Ladoga Symposium

Present state of Lake Ladoga.- Ecological problems of Lake Ladoga: causes and solutions.- The trophic state of Lake Ladoga as indicated by late summer phytoplankton.- Bacterioplankton response to eutrophication in Lake Ladoga.- Bottom sediments and biocoenoses of northern Ladoga and their changes under human impact.- Meiofauna of the profundal zone of the northern part of Lake Ladoga as an indicator of pollution.- Littoral zone of Lake Ladoga: ecological state evaluation.- Invertebrate communities associated with macrophytes in Lake Ladoga: effects of environmental factors.- Fishery of Lake Ladoga — past, present and future.- Hydrodynamics of Lake Ladoga and other large water bodies.- New morphometrical data of Lake Ladoga.- Main features of the thermal regime of Lake Ladoga during the ice-free period.- Numerical modelling of large-scale ciruclation in Lakes Onega and Ladoga.- Density structure of the fine surface water layer of large lakes and remote measurement of the temperature.- Physical limnological processes under ice.- Mixing in ice-covered lakes.- The influence of seasonal and year-to-year variability of water discharge from the Lake Ladoga — Neva River system on the salinity regime of the Baltic Sea.- The estimation of current state of Lake Ladoga using mathematical models.- Particle pathways of Niagara river water in Lake Ontario affecting bottom sediment contamination.- Water currents and spreading of river load in Lake Pyhäselkä, Saimaa, Finland.- Water quality and pollution.- Joint Russian—Finnish study of radioactive contamination in the NW part of Lake Ladoga.- Distribution and release of sedimentary phosphorus in Lake Ladoga.- Ecologic and hygienic evaluation of Lake Ladoga as a source of drinking water.- Lake Ladoga: chemical pollution andbiochemical self-purification.- A survey on toxicity of cyanobacterial blooms in Lake Ladoga and adjacent water bodies.- Mathematical model for the ecosystem response of Lake Ladoga to phophorus loading.- The impact of effluents of Pitkäranta pulp mill on the water quality of Lake Ladoga: a model study.- Protein indication method in monitoring of pulp mill effluent pollution in Lake Ladoga.- Ecological studies of Lake Ladoga biota.- Zooplankton characteristics in monitoring of Lake Ladoga.- Species composition of planktonic Rotifera, Cladocera and Copepoda in the littoral zone of Lake Ladoga.- Establishment of the Baikalian endemic amphipod, Gmelinoides fasciatus Stebb. in Lake Ladoga.- The Ladoga seal (Phoca hispida ladogensis Nordq.).- History of Lake Ladoga and rates of change in its environment.- Late- and postglacial history of lakes of the Karelian Isthmus.- Shoreline displacement of Lake Ladoga — new data from Kilpolansaari.- Lake Ladoga Region: human impacts and recent environmental changes.- Atmospheric deposition of sulphur, nitrogen and base cations in Scots pine stands of southeastern Finland and the Karelian Isthmus, NW Russia in 1992.- Research methods for large lakes.- Combined application of remote sensing and in situ measurements in monitoring environmental processes.- Combined use of spectral brightness and polarization characteristics of upward radiation in remote sensing of inland waterbodies.- Mathematical modelling of runoff and material transport from drainage areas into recipient water bodies.- Water chemistry of Lake Ladoga and Russian—Finnish intercalibration of analyses.- Comparison of methods used in zooplankton sampling and counting in the joint Russian—Finnish evaluation of the trophic state of Lake Ladoga.- Phytoplanktoncomposition and pigment concentrations as indicators of water quality in the Rybinsk reservoir.- The relationship between fish yield and primary production in large European freshwater lakes.- Spatial patterns and relationships between phytoplankton, zooplankton and water quality in the Saimaa lake system, Finland.- Structural phase diagrams of animal communities in assessment of freshwater ecosystem conditions.- Palaeolimnological analyses as information source for large lake biomonitoring.- Comparison of sampling methods for semipelagic animals in two deep basins of Lake Saimaa.- Sample size in the monitoring of benthic macrofauna in the profundal of lakes: evaluation of the precision of estimates.- Author index.