This book was composed in honour of Dr. Ir. W. G. Beeftink to commemorate his retirement as a plant ecologist at the Delta Institute for H ydrobiological Research, Yerseke, The Netherlands. The editors'' main aim has been to collect scientific papers of Wim Beeftink''s friends and colleagues. The title of the book: ''Vegetation between land and sea. Structure and processes'' was originally proposed by Prof. Dr. W. H. O. Ernst. It was amended by Prof. Dr. J. J. Barkman. In our judgement it reflects the best attempt to cover the numerous and divergent contributions under one heading. Not all papers however fit the "field" covered by the title, and we use this word both literally and metaphorically. We are glad and proud that so many authors went through the strain of the production of a paper, ill'' most cases not scheduled, with eagerness. Due to the fact that Wim Beeftink has so many close friends in the field of plant ecology, this fiber amicorum covers a wide range of disciplines covered, in turn, by a great variety of people. The papers range from taxonomy to experimental physiology, from fungi to seed plants, from autecology to synsystematics. Environmental pollution and management studies are also included. The contents of the papers depict Wim''s personal evolution as a botanist. Retired professors as well as students are amongst the authors, heads of departments as well as technicians. It proves Wim''s ability to be of one mind with all ranks.