Ecological preferences of alien plant species in North-Eastern Germany

摘要: The large, comprehensive vegetation database of Mecklenburg-Vorpommern/NE Germany with 51,328 releves allowed us to study an entire regional flora 133 non-native plants (NNP, immigration after 1492 AD) regard their preferences all kinds habitats and along different ecological gradients. For each releve, we computed average Ellenberg indicator values (EIV) for temperature, light, moisture, reaction, nutrients salt as well plant strategy type weights. We partitioned the dataset into without occurrences NNP compared them respect relative frequencies EIVs identified deviations from random differences by testing against permuted values. To account bias in EIV between community types, were differentiated 34 phytosociological classes. tested significance group a whole, single species within dataset, classes formations. prefer communities high temperature low moisture. They avoid reaction salt. proportions ruderal proportion stress strategists. differentiation reinforces general trends nutrients, R S types. Nevertheless, reveal that are not congruent but show individualistic preferences.