Dr. Fűköh Levente szerk.: Malakológiai Tájékoztató 27. (Eger, 2009.)

SÁNDOR, R.-SÜMEGI,P.: New preliminary data for evolution of the Holocene Hungarian Mollusc fauna

This fluvial environment existing in a lateglacial paleochannel must have been surrounded by an open, gallery-like mixed taiga vegetation. Around 9.000 BP the channel started filling up with sediment resulting in the emergence of a eutrophic lacustrine environment characterized by an organic rich water depth of 2- 3 m in the deepest parts of the horse-shoes lake. Parallel with these changes the surrounding vegetation also underwent a significant transformation resulting in the emergence of the deciduous woodland with the dominance of birch, then oak-lime and ash in the closest vicinity. This aquatic habitat underwent a total transformation first with the emergence of developing a reed peatland. The emergence of eutrophic conditions brought about a complete alteration of the Mollusk fauna as well. According to the radiocarbon data the accumulation of peat must have initiated as early as the beginning of the Atlantic phase in the paleochannel. Fűköh, L. (1991): Examinations on faunal-history of the Hungarian Holocene Mollusc fauna. - Folia Historico-naturales Musei Matraensis, 17: 13-28. Fűköh, L. (1992): Malacostratigraphic investigation of the Late Quaternary subsided zones of Hungary. - Folia Historico-naturales Musei Matraensis, 17: 97-106. Fűköh, L. (1997): Biostratigraphic and geomorphic investigation in areas of Hungary subsided during the Holocene. - Zeischrift für Geomorphologie, 110: 45-56. Jakab G. (2005): Növényi makrofosszília vizsgálati módszerek kidolgozása negyedidőszaki üledékek paleobotanikai leírására. - PhD-dolgozat, Szeged Troels-Smith, J. (1955): Karakterisering af losejordater. - Danmarks Geologiske Undersogelse, ser.IV. (10). References SÁNDOR, Renáta Szegedi Tudományegyetem Földtani és Őslénytani Tanszék Szeged, Pf. 658 6701 SÜMEGI, Pál Szegedi Tudományegyetem Földtani és Őslénytani Tanszék Szeged, Pf. 658 6701 E-mail: sandorreni@freemail.hu E-mail: sumegi@geo.u-szeged.hu