Eddy VAN DER MAAREL All in all 16 contributions could be collected. The This volume is the second of two volumes covering the symposium 'Advances in vegetation science', which was arrangerr. ent is as follows: held at Nijmegen, The Netherlands, from 15-19 May The contribution by Sjors may serve as a general intro- duction to the types of changes and their names. The 1979. This symposium was organized on behalf of the added paper by Noble and Slatyer provides appropriate Working Group for Data-Processing of the International Society for Vegetation Science. After this group held its facts and views on the mechanisms of vegetation dynamics. final meeting two years earlier it decided to continue its Then a group of contributions follows in which data on species behaviour, plant demography and diversity during activities, but in a wider scope. Most members of the succession are discussed. This includes Faliriski's study on Group felt that the original aim, i. e. the introduction of data-processing and multivariate methods for use in the sex structure and dynamics of pioneer woody species, a systematic description of plant communities, was more or fynbos diversity study by Campbell & van der Meulen and less fulfilled. The book Data-Processing in Phytosociology, studies on Mediterranean shrubs and trees in post-fire and postcultural developments by Trabaud and Lepart, Hous- largely based on papers in Vegetatio, edited by E. van der Maarel, L. Orl6ci & S. Pignatti, and to be published by sard, Escarre and Romane, and Debussche and Romane.