L. Hably szerk.: Studia Botanica Hungarica 23. 1992 (Budapest, 1992)

Papp, Beáta: Phytocoenological survey along the Koloska stream (Balaton-felvidék region, Hungary)

between the mouth of the valley and the Koloska karst spring is about 2.5 km. The study area is situated between the Koloska spring and Koloska restaurant, approximately 1.5 km long along the stream. A total of 17 quadrats were sampled by BRAUN-BLANQUET's (1964) method, each of them was 2 x 2 m, except for the 16th quadrat, whose size was 10 x 10 m. This one was sampled in a willow swamp (Calamagrosti-Salicetum cinereae), which was characterized by the high cover of willow trees and shrubs. The data were collected in May - June, 1988. For the identification of plant communities studies of KOVÁCS (1957, 1962) and KOVÁCS and FELFÖLDY (1958, 1960) were used. W and NC value diagrams of the important stands of the separated and identified communities were obtained using the flora lists by the method of ZÓLYOMI and PRÉCSÉNYI (1964), ZÓLYOMI et al (1966) and SIMON (1988). The W system of ZÓLYOMI classifies the species into 11 groups on the basis of their water requirement. The nature conservation (NC) values system of Simon arranges the Hungarian species into 10 groups. In groups 1-6 naturally occurring species can be found (unique (U), strictly protected species (KV), protected species (V), native constituents of communities (E), native species (K), native pioneers (TP)). In groups 7-10 indicators of degradation can be found: native disturbance tolérants (TZ), weeds (GY), crop plants (G), adventives (A). The cover values (A-D) were transformed by the method of van der MAAREL (1979) to make them suitable for computer analysis. The data were processed using Czekanowski's similarity index (CZEKANOWSKI 1909) in cluster analyses of the SYNTAX III program (PODANI 1988). The vegetation map was drawn on a 1:3500 scale. The boundaries of the stands of communities were determined during several walks in the area.