THE STRUCTURE OF THE FLORA OF THE PLANT GROUPS OF THE CITY OF LUTSK WITH THE PARTICIPATION OF SOLIDAGO CANADENSIS L.

Abstract

One of the main reasons for the decrease in biological diversity is the invasion of alien species of plants, as they transform ecosystems, displacing aboriginal species. One of these invasive species is the Solidago canadensis L. – a herbaceous polycarp, gemicryptophyte, xeromesophyte, heliophyte. Solidago canadensis L. populates the ecotopes of the city of Lutsk, forming herbaceous thickets in the composition of semi-natural slightly disturbed and anthropogenically transformed plant groups. 80 species of plants belonging to 17 families, 3 classes and 3 divisions described in the plant groupings of the city of Lutsk with the participation of S. canadensis L. The spectrum of 6 leading families of groupings includes 44 species, which is 55% of the total number of species. The leading families are: Asteraceae, Poaceae, Brassicaceae, Lamiaceae and Fabaceae. The biomorphological structure of the flora of plant groups with the participation of S. canadensis L. is dominated by herbaceous polycarpic (58,75%) and hemicryptophytes (47,5%). In the ecological spectrum of flora, there are more mesophytes among hydromorphs – 42 species or 52,5%; xeromesophytes – 21 species or 26,25%, which indicates the mesophilic nature of the flora of these groups. Heliomorphs are dominated by heliophytes – 48 species (60%) and heliosciophytes – 17 species (21,25%), which reflects the limitation of S. canadensis L. to illuminated locations. With an increase in the projective cover of S. canadensis L. in plant groupings, the number of accompanying plant species decreases, the share of ruderal species increases, and typical meadow plants disappear from the groupings.