A. Background and scope of the study ...3 1. General ..." ,-, ...11 B. Abandoned and marginal agricultural grasslands ...5 2. Some equilibrium models explaining species di- 1. Definition ...5 versity ., ..., ,-..., ...11 2. Inland areas in western Europe ...6 3. Change of the steady state .. , .. , ...14 3. Ca. stal areas in western Europe ...8 4. Dispersal of plant species ..., ,- 14 C. Nature mc.nagement practices ...10 5. 'Ecotypic' diversity .. , ...15 D. Theoretical considerations on nature management 6. Patterns in plant communities ...15 with special reference to diversity ...7...,. 11 Implications for management 16 LA. Background and scope of the study (Klapp, 1965), Belgium (Van Hecke, Impens & Behaeghe, 1981) and the Netherlands (Oomes & The degradation of flora and vegetation in natural Mooi, 1981; Elberse, Van Den Bergh & Dirven, and semi-natural landscapes has become a matter 1983; Willems, 1983A).
` This volume can be recommended for its detailed ecological approach to management, and more importantly, for the attitude that it conveys concerning the conservation and active management of semi-natural species-rich plant communities for their own intrinsic value. '
S. Collins in Quarterly Review of Biology, vol. 65, June 1990
One: Introduction.- The need for nature management.- I Introduction.- II Research approach and methods.- Two: Land Use Dynamics.- From agricultural practices to nature management.- III The Drenthe Plateau.- IV The Schiermonnikoog salt marsh.- Three: Vegetation Dynamics.- Restoration management creates species-richer plant communities: three cases.- V The heathland and reclaimed grassland vegetation.- VI The valley grassland vegetation.- VII The salt marsh vegetation.- Four: Ecosystem Dynamics.- Causes of observed changes: mineral removal/increasing soil salinity or structure of the sward?.- VIII Grazing.- IX Cutting regimes.- X Changing soil conditions and stand structure as causes of floristic changes: conclusions and synthesis.- Five: Population Dynamics.- Where do the new species come from?.- XI Seed dispersal and seed bank.- XII Re-introduction of seeds.- Six: Management.- Evaluation of the obtained knowledge.- XIII Management.- Summary.- References.