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

near in or to the built-up areas. These subgroups also differed in their average species number, with values 7 and 4, respectively. The saxicolous subgroups (number 5, 6 and 7) differed less remarkably, however, group 5 tended to hold sites of the edge of the built-up areas, whereas groups 6 and 7 were more characterized by sites from the inner city of Komárom. The results obtained by the global optimization method for the epiphytic subgroups were re-allocated to the map of the study area (Fig. 5). Results of the group average clustering The dendrogram created according to the group average method (Fig. 3) does not allow a complete interpretation of the clusters, however, some of the clusters are related to certain habitat attributes. Sites in wooded patches far from the re Q 0.3 rtl 1 93 g4 g6 g7 g

1 g2 Fig. 2. Dendrogram of the sampling sites according to the global optimization method. Jaccard-index was used to measure dissimilarities. Groups and subgroups (gl-g7) are discussed in the text.