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Ukr. Bot. J. 2017, 74(5): 421–430
https://doi.org/10.15407/ukrbotj74.05.421
Plant Taxonomy, Geography and Floristics

Taxonomic structure of coenofloras of the classes of pioneer vegetation of Ukraine

Dubyna D.V., Dvoretzkiy T.V., Iemelianova S.M., Dziuba T.P., Tymoshenko P.A.
Abstract

Taxonomic structure of the flora of newly formed habitats (represented by 1690 species of 584 genera from 104 families) and coenofloras of the classes of pioneer vegetation of Ukraine (844 species of 338 genera from 80 families) was analyzed. It has been found that similarity of both groups according to Jaccard index is 0.28. The majority of species of the flora of newly formed habitats and coenofloras of the classes of pioneer vegetation in Ukraine belong to Magnoliophyta. Vascular spore and gymnosperm plants in both groups are less significant. Ten leading families (Asteraceae, Poaceae, Brassicaceae, Fabaceae, Caryophyllaceae, Chenopodiaceae, Lamiaceae, Apiaceae, Scrophulariaceae and Polygonaceae) include 63.2% of species in newly formed habitats and 66.3% in pioneer plant communities. The family spectra of the pioneer vegetation classes were analyzed. The floristic proportions were established, which indicate that both floras are historically young and represent physical and geographical pecularities of the environmental conditions as well as high fluctuation activity of ecological processes. The aboriginal fraction was studied; it contains 560 species of 252 genera from 70 families. Similarity of the species composition of the newly formed habitats, coenofloras of the classes of pioneer vegetation and their aboriginal fractions has been analyzed according to Jaccard index.

Keywords: flora, coenoflora, systematic structure, pioneer vegetation, Ukraine

Full text: PDF (Ukr) 732K

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