I. In honour of Prof. Dr. D. E. Frey and Prof. Dr. S. R. Brown, the organizer of the paleolimnological symposia.- 1. A biographical sketch of David G. Frey.- 2. A biographical sketch of Seward R. (Ted) Brown.- 3. The PIRLA project: Paleoecological investigation of recent lake acidification.- 4. 210Pb dating by low background gamma counting.- 5. 137Cs as a tracer of recent sedimentary processes in Lake Michigan.- 6. The chemistry of lake sediments in time and space.- 7. Calculating net annual accumulation rates of sediment components exemplified by pollen.- 8. Sedimentary records of accelerated nutrient loading in Florida lakes.- 9. Material transfer from water to sediment in Florida lakes.- 10. Pollen as a chronometer and sediment tracer, Burrinjuck Reservoir, Australia.- 11. Sedimentary pigments as an index of the trophic status of Lake Mead.- 12. Biogenic silica and phosphorus accumulation in sediments as indices of eutrophication in the Laurentian Great Lakes.- 13. Mallomonadacea (Chrysophyceae) Scales: Early biotic paleoindicators of lake acidification.- 14. The relationship between surface sediment diatom assemblages and pH in 33 Galloway lakes.- 15. Diatom biostratigraphy and comparative core correlation within a small lake basin.- 16. Interpretation of bryozoan microfossils in lacustrine sediment cores.- 17. On the relationship between the Bosmina taxa coregoni and thersites (Cladocera), as indicated by sub fossil remains.- 18. Ecological correlates of net accumulation rates of Cladocera remains in lake sediments.- 19. Cladoceran remains as indicators of lake acidification.- 20. Magnesium and strontium in non-marine ostracod shells as indicators of palaeosaliniy and palaeotemperature.- 21. On the preservation of carapaces of some limnic ostracods: An exercise inactuopalaeontology.- 22. Information value of chironomid remains in the uppermost sediment layers of complex lake basin.- II. Regional Paleolimnology.- 23. Paleolimnology of mid-elevation lakes in the Kenya Rift Valley.- 24. Upper Pleistocene and Holocene lakes in the An Nafud, Saudi Arabia.- 25. Late Quaternary palaeohydrology of Lake Huinaymarca (Bolivia).- 26. The Pleistocene lake deposits of the NE Baza Basin (Spain).- 27. Organic microscopic remains in Miocene lacustrine sediments near Libros (Teruel, Spain).- 28. Non-siliceous algae in a five meter core from Lake Kinneret (Israel).- 29. Limnologic consequences of the decline in hemlock 4800 years ago in the three Southern Ontario lakes.- 30. Geology and sedimentary history of Lake Traunsee (Salzkammergut, Austria).- 31. Sediments and sedimentary history of Lake Attersee (Salzkammergut, Austria).- 32. Diatom distribution and diatom inferred pH in the sediment of four alpine lakes.- 33. Late Quaternary diatoms in the sediments of Przedni Staw Lake (Polish Tatra Mountains).- 34. Scandinavian limnochronology of sediments and heavy metals.- 35. A geographical survey of littoral crustacea in Norway and their use in paleolimnology.- 36. Preliminary study of the development of the subfossil chironomid fauna (Diptera) of Lake Taylor, South Island, New Zealand, during the younger Holocene.- III. Lake Changes Related to the Influence of Man.- 37. Biogenic silica records in the sediments of Little Round Lake, Ontario.- 38. Litho- and palynostratigraphy at Lobsigensee: Evidences for trophic changes during the Holocene.- 39. An early meromictic stage in Lobsigensee (Switzerland) as evidenced by ostracods and Chaoborus.- 40. Carotenoids from plankton and photosynthetic bacteria in sediments as indicators of trophic changes in Lake Lobsigen during the last 14000 years.- 41. Stratigraphy of specific algal and bacterial carotenoids in the sediments of Lake Varese (N. Italy).- 42. The content of chlorophyll in the sediment of the volcanic maar lakes in the Eifel region (Germany) as an indicator for eutrophication.- 43. Phosphorus budgets and forms of phosphorus in the Sau reservoir sediment: An interpretation of the limnologi

Klappentext

The Fourth International Symposium on Paleolimnology was held in 1985 from 2 -7 September at Lake Ossiach and close to the Austrian village of Ossiach (mentioned in historical records for the first time in 1028). After the opening speeches a performance by a Carinthian folk-dance group gave the participants a taste of the rural atmosphere of Austria's southernmost federal land. 125 paleolimnologists presented and discussed papers during the meetings and many participated About in the pre-congress excursion devoted to the Salzkammergut, and in the post-congress excursion to Neusied­ lersee. There was a half-day trip during the symposium to Langsee which is well known from the pioneer work carried out by Professor D. G. Frey more than 30 years ago. In addition to methodological papers most of the special fields of paleolimnology were covered. Special attention was given a.o. to geochemistry, pigments and meromictic lakes. The geographical range of the sites investigated was quite wide. In this connection it is regrettable that none of the expected Soviet colleagues was able to attent the symposium. Under the presidency of Professor D. G. Frey the present members of the international organizing committee (Prof. S. R. Brown, Prof. E. S. Deevey, Prof. F. Oldfield and Dr. M. Ralska-Jasiewiczowa) contributed considerably to the success of the symposium. Likewise our thanks goes to those who helped behind the scenes (Mr. M. Bobek, Mr. M. Fusko, Mrs. A. Klenner, Ms. B. Stipanits and Ms. K. Wolter).