De bosvegetatie van de Achterhoek en enkele aangrenzende gebieden

The tree, shrub, herb and moss vegetation of woodland in the Achterhoek and neighbouring areas was analysed. It was described according to the concepts of the French and Swiss school of Braun-Blanquet. The study was confined to woodland whose composition approached the natural state. Experimental areas were of different form from 150 to 300, sometimes 800 m 2. The sociological survey was supplemented by data on habitat, growth and age of the stand and the vegetation layers. The descriptions of the different plots were combined into tables, indicating the characteristic species of the association, the higher sociological units, the companion species and the accidental species, while subassociations were separated according to differentiating species. The descriptions and tables refer to plant communities belonging to Alnion glutinosae, Alneto-Fraxinion, Quercion and various degeneration stages.
These chapters are preceded by a discussion of different climax theories. The work closes with an attempt to reconstruct the original vegetation.