B. Papp szerk.: Studia Botanica Hungarica 30-31. 1999-2000 (Budapest, 2000)

Csontos, Péter, Lőkös, László; Molnár, Katalin: Numerical analysis of lichen zones in Komárom, NW Hungary

groups 2 and 3 is very similar, they differ in their average species numbers, 4 and 6, respectively. In case of some sampling sites, a completely identical lichen flora was found. These sites were characterized by tree groups and the specimens were collected from barks. Such pairs were amalgamated in the first step and found at zero dissimilarity level in the dendrograms as it is seen for sites 4 and 66 (with the species list: Amandinea punctata, Phaeophyscia orbicularis, Physcia tenella and Xanthoma parietina). Another, floristically identical group was formed by sampling sites 13, 54, 56 and 74. CONCLUSIONS Considering the results of the three different analyses, a better correspondence with habitat characteristics was found for sampling sites with epiphytic lichens than those of having a predominantly saxicolous lichen flora. One reason for i9 0.4 E in in Q O. 3 H<4>űC3r> r> >a H n H >Ä H in in r-o eoncor-QNojo^Or- 4/^

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rJH Hr-uîcimi» n r- H NN tn V <T V eoimnJNfl'in gi g2 g3 Fig. 4. Dendrogram of the sampling sites according to the complete linkage method. Dissimilarity of the species composition of lichens was measured by the Jaccard-index. Groups (gl-g3) are discussed in the text.