The role of archaeophytes and neophytes in the Dutch coastal dunes
Tóm tắt
The position of alien plant species in the Dutch coastal dune vegetation is evaluated considering 12 archaeophytes and 20 neophytes (including one moss), all of widespread occurrence in the coastal area of the Netherlands. Almost all archaeophytes have become part of natural vegetation types. Open scrub communities, in particular Hippophae rhamnoides-Sambucus nigra scrub at the leeside of the outer dunes, and calciphilous moss-dominated pioneer vegetation are relatively rich in archaeophytes. Among neophyte vascular species a contrast is apparent between herbaceous and woody species. The majority of herbaceous neophytes are characteristic of man-disturbed habitats and are only infrequently observed in natural vegetation types. However, woody species (as well as the moss Campylopus introflexus) have entered into natural vegetation on a large scale and behave in an invasive way.
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