Matskási István (szerk.): A Magyar Természettudományi Múzeum évkönyve 93. (Budapest 2001)
Medzihradszky, Zs.: The Holocene sequence of the pollen record from Keszthely-Úsztatómajor, Hungary
logical topography of Hungary" (SÁGI 1966) and "The reconstruction of the KisBalaton 1 ' project (KÖLTŐ & VÁNDOR 1996). Our locality is situated south from the Hévíz Lake, between the Hévíz and the Usztatómajor-channel. Today most of the area is uncultivated, the level of the underground water is high. The recent vegetation of the area is tall sedge vegetation. The surroundings of this part of the mire are farmland, cultivated area and planted forests. Close to our locality there are two towns, Keszthely and Hévíz. The thermalwater outflow of the Hévíz Lake provides special conditions for the local vegetation. In 1997-1999 a complex palaeobotanical investigation was carried out on this locality. The 580 cm deep sequence was cutted into two parts; one of them was dated by radiocarbon methods in the Institute of Nuclear Research of the Hungarian Academy of Sciences, in Debrecen. The second part was studied by pollen and macrofossil analyses. The whole sequence includes the past 11000 years. In this paper we discussed the Holocene part of the pollen diagram, the intensity of human occupation mirrored in the tree and herbaceous pollen flora as well. MATERIALS AND METHODS Selection of the coring site - The mire was explored by the National Peat Cadastral Survey. We pointed out our core based on its 1:2880 scale maps and on the advise of J. DÖMSÖDI. Double, 580 cm deep boreholes were deepened using Russian peat sampler. Laboratory technique - We followed the standard laboratory treatment after ERDTMAN (1943). If it was necessary we sieved the organic material to remove coarse debris. To dissolve silica we used HF. Pollen concentration values were obtained by adding Lycopodium tablets to the samples (STOCKMARR 1971). The volume of the sediment samples was 1 cm 3 , the diagram has a sampling interval of 5 cm. Identification of the pollen taxa was made on the basis of the common pollen keys (FAEGRI & I VERSEN 1989), pollen atlases of MOORE et al. (1991), REILLE (1992) and the pollen collection of the W. Szafer Botanical Institute of the Polish Academy of Sciences. For the presentation of the diagram we used the Tilia and Tilia Graph softwares. The 100% was the sum of the arbor pollen (AP) and the non-arbor pollen (NAP). To reduce the statistical errors in the calculation of the pollen spectra the analysis was extended to at least 1000 pollen per samples (RALSKA-JASIEWICZOWA & BERGLUND 1986). The aquatic pollen and the spores are excluded from the sum.
