Alien plants species in national nature park «Vyzhnytsky»: Lupinus polyphyllus Lindl. and Quercus rubra l.
Keywords:
invasion, Lupinus polyphyllus, Quercus rubra, coenotic affinity, National Nature Park «Vyzhnytsky»Abstract
Phytocoenotic features of two alien plants species of North American origin Lupinus polyphyllus Lindl and Quercus rubra L. in the National Nature Park «Vyzhnytsky» are reported. It has been established that in the NPP territory Lupinus polyphyllus dominates as a part of the formations of Arrhenatherion elatioris Luquet 1926 alliance Molinio-Arrhenatheretea Tx. 1937 class, belonging to the habitats of Resolution 4 of the Berne Convention – E2.2: Low and medium altitude hay meadow, therefore, it is necessary to monitor the condition of these herbaceous community and develop measures for their preservation and maintenance. Quercus rubra, which was purposefully planted more than 50 years ago on the site of a felled beech forest, as a result of its high competitiveness displaces species of natural flora from all forest tiers and form floristically poor artificial phytocenoses. It is observed a replacement of natural communities belonging to the habitat listed in Resolution 4 of the Bern Convention – G1.6: Fagus woodland by synanthropic forest habitats «D1.8 Anthropogenic broad-leaved forest». At the forest outskirts in the Q. rubra introduction sites is also observed a continuous predominance of the species, so the typical grass formations of the forest outskirts are displaced by the undergrowth of Q. rubra. Thus, the use of Q. rubra during afforestation leads to the transformation of two types of habitats: natural forests are transformed into monodominant forest crops of invasive deciduous species; forest outskirts formations disappear as a habitat type. The alien plants under study Lupinus polyphyllus and Quercus rubra are highly active, show a tendency to spontaneous spread, are able to change the composition and structure of phytocenoses, so the urgent task of the park staff is to control the distribution of these species, monitoring research at the phytocenotic and population levels, development and implementation of measures to stop their invasion.
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