Paleolimnology : Proceedings of the Third International Symposium on Paleolimnology, Held at Joensuu, Finland

The Third International Symposium on Paleolimnology was held at the beginning of September 1981 in Finland. After registration at the University of 10ensuu and the opening session and welcome reception in the Town Hall, the participants moved to a hotel at Koli, a hill famed as a landmark and for its panoramic view. Here the lecture session, lasting four days, took place. Momentarily, the mosaic of the lakeland became visible between the clouds showing the hill slopes covered by mature spruce forest and scattered old birch trees, a reminder of the last slash-and-burn phase some 130 years ago. Altogether 120 paleolimnologists participated in the meetings and most also attended one of the two post-symposium excursions to the Arctic Circle and to South Finland. The lectures covered a wide range of paleolimnological subjects. The main topics, however, included current aspects in the dating of sediments and the history of eutrophication. The symposium was advised by the international organizing committee under the presidency of Professor Edward S. Deevey. Other members present at Koli were Dr. Maj-Britt Florin, Dr. Heikki Ignatius, Prof. Heinz Lamer, Prof. Gerbert Martinson and Dr. Magdalena Ralska-lasiewiczowa. They also gave direction to a discussion on future plans for international activity in paleolimnology. Later in the autumn, after the end of the symposium, the partici­ pants sent special thanks to the secretaries, Mrs. Eija Merilainen, Mrs. Tuula Nylander and Mrs. Anita Toukomaa, for solving individual problems during the symposium with smooth and rapid efficiency. Front Matter....Pages I-X Aspects of the developmental history and paleolimnology of lakes in Finland....Pages 1-4 Säynäjälampi and the difficulties inherent in the dating of sediments in a hard-water lake....Pages 5-14 The use of fallout 137 Cs and 239,240 Pu for dating of lake sediments....Pages 15-19 Caesium-137 profiles in the sediments of a partial-meromictic lake on Great Sandy Island (Fraser Island), Queensland, Australia....Pages 21-27 The assessment of 210 Pb data from sites with varying sediment accumulation rates....Pages 29-35 Mineral magnetic studies of lake sediments....Pages 37-44 Global holocene magnetostratigraphy....Pages 45-51 The use of magnetic measurements in interpreting the fire histories of lake drainage basins....Pages 53-58 Changing patterns of sediment accumulation in a small lake in Scania, southern Sweden....Pages 59-64 The use of X-ray radiographic methods in studying sedimentary properties and rates of sediment accumulation....Pages 65-69 An automated technique for the accurate positioning of sediment core sites and the bathymetric mapping of lake basins....Pages 71-74 Recent climatic changes recorded by the salinity of pore waters in the Dead Sea sediments....Pages 75-79 Trace element associations as indicators of sediment accumulation in lakes....Pages 81-84 Transfer functions for estimating paleoecological conditions (pH) from East African diatoms....Pages 85-90 Interpretation of lake quality from contemporary diatom assemblages....Pages 91-97 Bacterial decomposition of organic matter in lacustrine sediments....Pages 99-102 Relationship between sedimentary pigments and primary production: evidence from core analyses of twelve Italian lakes....Pages 103-106 The mythical concept of eutrophication....Pages 107-111 Paleolimnological reconstruction of the effects of atmospheric deposition of acids and heavy metals on the chemistry and biology of lakes in New England and Norway....Pages 113-123 Cultural disturbances and trophic history of a small meromictic lake from central Canada....Pages 125-130 Diatom and chrysophyte relict assemblages in the sediments of Blelham Tarn in the English Lake District....Pages 131-133 Changes of the benthic fauna of the profundal zone of Traunsee (Austria) due to salt mining activities....Pages 135-139 Cladoceran remains as evidence of change in trophic state in three Swiss lakes....Pages 141-146 Changes in diatom flora deposited annually during the freshening of the impounded, sea-bay of Gennarbyviken in southern Finland....Pages 147-152 Eutrophication processes in Spanish reservoirs as revealed by biological records in profundal sediments....Pages 153-158 Seasonal eutrophication by wildfowl in basins isolating from the sea....Pages 159-163 Eutrophication and the disappearance of lakes in the Brodnica Lake District, Northern Poland as a result of human interference....Pages 165-168 An attempt to trace eutrophication in a shallow lake (Balaton, Hungary) using chironomids....Pages 169-175 Zn, P and ATP in the sediments of two lakes in South Finland....Pages 177-179 Clostridium perfringens (Holland) as an indicator of human effluent in the sediment of Lake Tuomiojärvi, central Finland....Pages 181-184 Paleolimnological studies of annually-laminated sediments in Loe Pool, Cornwall, U.K.....Pages 185-191 Recent geologic development of Lake Michigan (U.S.A.)....Pages 193-198 Paleolimnology of the Peten Lake district, Guatemala....Pages 199-203 Paleolimnology of the Petén Lake district, Guatemala....Pages 205-210 Paleolimnology of the Peten Lake District, Guatemala....Pages 211-216 The Holocene development of some low and high arctic Greenland lakes....Pages 217-224 Palynological investigations of the sediments of ten lakes in eastern Holstein, North Germany....Pages 225-230 Development of Grossensee (Holstein, Germany): variations in trophic status from the analysis of subfossil microfauna....Pages 231-234 Stratigraphy of Cladocera and Chironomidae in a core from a shallow North German lake....Pages 235-239 Diatom succession in the post-glacial sediments of the Komořany Lake, North-West Bohemia, Czechoslovakia....Pages 241-245 The environmental evolution and infilling process of a former lake near Vracov (Czechoslovakia)....Pages 247-250 Variability of Actinocyclus kuetzingii (A.S.) Sim. in the Littorina sediments of the Polish Baltic Coast....Pages 251-256 Paleolimnological investigations in humid and arid zones of the Soviet Union....Pages 257-260 Recent history of Lake Ladoga....Pages 261-263 Diatoms in the plankton and sediments of two lakes of different trophic type....Pages 265-268 Palynological investigations of the sediments of the north-western lakes of the Russian Plain and the Baltic Sea....Pages 269-273 The Middle-Valdaj Lakes in the Western part of the Bolshezemelskaja tundra....Pages 275-278 Sediment formation in Lake Baikal....Pages 281-285 Recent stratigraphy and accumulation of sediment in the deep, oligotrophic Lake Pääjärvi in South Finland....Pages 287-293 Biostratigraphy of Lake Spitaalijärvi: an ultraoligotrophic small lake in Lauhanvuori, western Finland....Pages 295-301 Sysmäjärvi — a lake polluted by mining waste-water....Pages 303-308 Sedimentary chemistry of a small polluted lake, Gallträsk, S. Finland....Pages 309-318