Abstract
When marginal agricultural lands are left idle, a vegetation type develops which is not adapted to grazing. If such vegetation is grazed, as has happened in Mols Bjerge (Eastern Jutland, Denmark), changes occur in the composition of species,whereby the dominants are reduced while the less frequent species increase. In Mols Bjerge the main means of plant dispersal is vegetative (horizontal, rhizome) and endozoic (dispersal) via cattle. However, dispersal is very slow. Species such as Holcus mollis and Carex arenaria are dispersed vegetatively, while dicotyledonous herbs (especially Pimpinella saxifraga and Campanula rotundifolia) are dispersed endozoically. It is suggested that areas rich in species should be grazed by cattle immediately before those poor in species if it is desired to assist immigration of dicotyledonous species.
Published Version
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