Matskási István (szerk.): A Magyar Természettudományi Múzeum évkönyve 90. (Budapest 1998)

Dobolyi, K.: Phytosociological studies on the andesite rocky grasslands in Visegrád Mountains (Hungary)

Table 7. Distribution of life form (RAONKIALR 1907) (expressed in percentage) Groups of relevés Life form I. II. III. IV. V. VI. Total Mega-mesophanerophyta 1.2 0.33 Microphaneropnyta 0.8 1.2 0.5 Nanophanerophyta 0.4 2.0 0.5 Chamaephyta 9.1 18.5 17.6 10.8 18.4 15.2 13.4 Geophyta 3.1 7.5 3.3 3.6 9.6 3.2 5.1 Hcmikryptophyla 56.0 46.5 58.8 72.4 62.6 71.6 60.3 Hemitherophyta 3.6 2.6 3.3 1.3 1.4 1.2 2.6 Therophyta 25.8 24.9 17.0 10.7 8.0 6.8 17.3 The andésite grasslands can belong to several plant communities. The six groups of relevés cannot be identified with any described associations despite that a number of relevés seem to be typical of Mimiartio-Festucetum pseudodalmaticae. According to the floral and phytosociological composition the six sample groups are close to the Asplenio-Festucion pallentis association group (ZÓLYOMI 1966). Dry grassland elements (Festuco-Bronietea), members of rocky grasslands (Festucetalia valesiaceae) and the silicate grassland elements are predominant (Table 9). Members of several weed communities and the relatively high proportion of the indifferent species can be considered as signs of degradation. Analysis of social behaviour types (SBT) offers information about the ecological characeristics and naturalness of the investigated grasslands. The distribution of SBT shows that specialists, competitors and generalists are dominant in the sample groups Table 8. The phytogeographical spectrum of the groups of relevés (Ranking according to HORVÁTH et ol. (1995) (expressed in percentage) Groups of relevés Area I II 111 IV V VI Total Cosmopolitan 0.8 11.3 9.9 8.8 4.4 3.2 5.2 Circumpolar 3.0 2.0 3.3 3.9 7.7 1.6 3.9 Eurasian 25.5 14.7 9.3 13.7 17.7 18.4 18.9 Continental 0.4 2.9 5.0 2.7 3.5 6.0 2.4 European 6.8 16.8 10.4 6.1 5.4 15.2 9.3 Central-European 3.4 1.9 9.3 5.8 1.8 4,1 3.8 Central-EuropeanAlpin 0.3 0.4 0.2 Submediterranean 11.4 18.5 15.4 9.0 13.8 16.0 12.2