Succession in urban habitats: an analysis of phytosociological data

Phytosociological data from 46 permanent plots located in various urban habitats within the town of Plzeň, W Bohemia, were analysed. Differences between species occurrences in 1969 and 1974 were expressed as a shift in the values of the Braun-Blanquet scale. This method made it possible to distinguish among early, middle and late successional species. Changes in life forms, plant strategies as well as the representation of families and phytosociological units were discussed and found to be consistent with results reported by quantitative studies. The review of Central European phytosociological studies on succession in urban habitats is presented. Pros and cons of the phytosociological approach to study of succession are discussed.