Retamoid scrubs of the Cytisetea scopario-striati in the Netherlands: a new approach to classify marginal associations ... : Rutenstrauchgebüsche der Cytisetea scopario-striati in den Niederlan-den: ein neuer Ansatz zur Klassifikation von Marginalassoziationen ...

Marginal associations, i.e. floristically impoverished associations at the margin of the distribution area of a higher syntaxon, form a problem in vegetation classification, because true character species are lacking. We propose a new approach for the classification of such marginal associations, making use of the notion of 'chorological tension zones'. In the absence of true character species, the species from other syntaxa of the same formation can be used as such. Our proposal is to use the species group from every formation-true class only once within every marginal alliance, to limit the... Mehr ...