Neophyten in NatÜRlichen Pflanzengesellschaften Mitteleuropas

Abstract

About 100 naturalized species have established themselves in natural communities. Sixteen of them occur regularly and in quantity; thirty more may be of regional importance. These introductions are prominent in communities of the seacoasts and river valleys. Communities of extreme conditions, and climax communities, have permitted the establishment of few introduced species. Most of the species in question come from similar climatic regions in Asia and North America. They often depend largely on vegetative multiplication. The new species may become associated with a particular community without altering its character in other respects, or it may cause the diminution or elimination of some existing species. In several cases the introduction has become a characteristic species. || ABSTRACT AUTHORS: D. W. Goodall