Abstract
The information about the modern state synanthropization of forest and schrub floristic complexes of the Middle Cis-Dnipro Region (Ukraine) is generalized. The studies complexes recently have been significantly affected by anthropogenic influences and its consequences have led to a change in their floristic composition. The synanthropic fraction of the flora of studies floristic complexes is represent by 262 species of vascular plants, incl. 100 apophytes and 162 aliens. The results of fractional and structural analysis is presented. In the apophytic fraction, the largest number of species belongs to the families Asteraceae (23 species) and Caryophyllaceae (15); in this group are prevail: in the life forms spectra (according to K. Raunkier) – hemicryptophytes (52 sp.); in the hydromorphes spectra – xeromesophytes (36) and meso-xerophytes (32); according to the degree of adaptation of species to transformed ecotops – evapophytes (41) and hemiapophytes (38); by coenotic peculiarity – meadow (35). In the alien fraction, the largest number of species belong to the families Asteraceae (25) and Rosaceae (15); in this group are dominated by: species of North American (44) and Mediterranean (37) origin; according to the degree of naturalization – epoecophytes (64); in the life forms spectra – therophytes (54); in the hydromorphes spectra – mesophytes (75) and xeromesophytes (67). Annotation list of synanthropic fraction species, as well as apophytic and alien, is presented. A separate list of species of the forest and schrub complexes (46), which are able to extend to the transformed ecotopes outside the forest coenoses is presented. The predominance of adventization process over apophytization indicates a significant disruption of the structure of many plant communities. In the alien fraction a high percentage of species tree is observated. The most species as well as of apophytic and alien fractions of the studies complexes in the Region are characterized by high degree of naturalization and active and mass distribution. Some alien species, e.g. Amorpha fruticose, Acer negundo, and Impatiens parviflora etc. in the Region are transformer species, e.g., A. fruticosa is a characteristic species of F1.11 and G 1.112 biotopes; A. negundo dominates in coenosis of G1.35 biotope and formed of plant community in І4.111 and І4.12 biotopes, Impatiens parviflora – in G3.11 and G3.12 biotopes.
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