Kaszab Zoltán (szerk.): A Magyar Természettudományi Múzeum évkönyve 71. (Budapest 1979)
P. Komáromy, Zs.: Algal flora of Hungarian sandy soils I. Some algological investigations in Kiskunság National Park, Hungary
58 ZS. P.-KOMÁROMY This paper deals with the samples collected in the following localities and dates: Örkény 10.6. 1977 (8 samples); Fülöpháza 7.3.1978, 25.4.1978, 10.5.1978, 19.7.1978 (altogether 80 samples); Izsák (Bikatorok) 9.5.1978 (10 samples); Bugac 13.10.1978 (10 samples). As soon as the samples reached the laboratory, they were microscopically examined. The soil temperature and the light intensity were recorded during the gathering. The moisture content of the samples were measured by drainage at 105 °C. Results and discussion The sample plots were chosen on account of observable dissimilarities in the macrovegetation. On the sampling plot between Fülöpháza and Fülöpszállás villages, Festucetum vaginatae stipetosum was developing on the top of the sandhills, passing over to Festucetum vaginatae fumanetosum on the hillside. Depending on the size of interspaces among the tussock of grass some moss, lichen, and soil alga species were observed. The other sampling plot is in the Junipero-Populetum albae association near Bugacpuszta. In deeper places Holoschoenus ramosus, Koeleria bunches and mossy lichen patches are growing, alternating with naked sand plots. On the sandhills Juniperus communis grows encircled with mosses and lichens but there are relatively large rough sand surfaces among them. The samples, coming from the neighbourhood of Örkény and Izsák (Bikatorok) villages, were collected in Junipero-Populetum association, too, but these essentially differ from those collected near Bugac, in the species composition of macro- and microvegetation. It appears that the occurrence of soil algae is more frequent on naked sand than among grasses and lichens or on mossy places. It was observed during the examinations that green and gray-green patches appear on the rough sand in early spring and autumn, when sand is watered by melting snow and rain water or by fog and dew. At such time the wet sand cannot move so the soil algae are able to spread on it. In summer, when the sand is dry the wind covers and uncovers Fig. 1. Quick ground and loess areas in great Hungarian Plain (BULLA 1954 p. 218). — Fig. 2. The mean level of the underground water surface in sandy ridge of the Kiskunság (by RÓNAY in: BULLA 1962 p. 285), 1 = less than 3 m, 2 = 3-6 m, 3 = 6-10 m, 4 = more than 10 m *
