B. Papp szerk.: Studia Botanica Hungarica 36. 2005 (Budapest, 2005)

Dobolyi, Konstantin: Phytosociological evaluation and multivariate analysis of the habitat of Linum dolomiticum Borbás (Linaceae) II.

Studia bot. hung. 36, pp. 43-66, 2005 PHYTOSOCIOLOGICAL EVALUATION AND MULTIVARIATE ANALYSIS OF THE HABITAT OF LINUM DOLOMITICUM BORBÁS (LINACEAE) II* K. DOBOLYI Department of Botany, Hungarian Natural History Museum H-1476 Budapest, Pf. 222, Hungary; dobolyi@bot.nhmus.hu Phytosociological study of Linum dolomiticum habitat has been carried out based on 135 relevés on the complete area of distribution. The habitat encompasses the following plant communities: Seseli leucospermi-Festucetum pallentis, Stipo eriocauli-Festucetum pallentis, Seseli leucospermi-Brometum pannonici, Festuco pallenti-Brometum pannonici and several transitions and degraded forms of these communities. These grasslands in part belong to the herb layer of the Pannonian karst white oak low woods. The vegetation was analysed statistically according to life form, phytogeographical area, phytosociological character, social behaviour type and ecological indicator values (preference categories) of the species. The habitat of Linum dolomiticum may be characterised by several types of coenotones and ecotones. With 17 tables and 2 figures. Key words: coenotone, dolomite rock grasslands, ecotone, Linum dolomiticum, multivariate analysis, phytosociology INTRODUCTION Previous phytosociological study of the habitat of the endemic Linum dolomiticum was carried out by MÉSZÁROS-DRASKOVITS (1967), and multivariate analysis of the original relevés was published in the first part of our study (DOBOLYI 2003). As those investigations covered only a relatively small part of the full distribution area, their results are considered to be incomplete. As concluded by the earlier studies, the habitat of Linum dolomiticum belongs to the following plant communities: Seseli leucospermi-Festucetum pallentis Zólyomi 1958, Stipo eriocauli-F estucetum pallentis Zólyomi 1966 and Seseli leucospermi-Brometum pannonici Borhidi 1996. However, more recent field experiences indicate that Linum dolomiticum occurs in other forms of associations such as closed dolomite rock grassland, degraded forms of rock steppes and karst white oak low woods (DOBOLYI 2001). Purpose of the recent study is to provide a phytosociological analysis for the complete distribution area of Linum dolomiticum, i. e. to determine and characterise all vegetation types of the habitat of the species. * Dedicated to Rózsa Mészáros-Draskovits Studia Botanica Hungarica 36, 2005 Hungarian Natural History Museum, Budapest