ANALYSIS OF TAXONOMIC STRUCTURE OF AQUATIC AND WETLAND ECOSYSTEMS FLORA OF PODOLIA
Journal Title: Naukovyi visnyk Chernivetskoho universytetu. Biolohiia (Biolohichni systemy) - Year 2017, Vol 9, Issue 1
Abstract
The structural and comparative analyses of taxonomic structure of aquatic and wetland ecosystems flora of Podolia was performed. Floristic list includes 535 species belonging to 483 genera, 97 families and 4 divisions. Key indicators of taxonomic structure of studied flora were analyzed: the quantitative composition of the major taxonomic units and their correlation, the basic floristic proportions, species richness of spectra of the leading families and genera. A characteristic feature of the flora is the small number of bryophytes (23 species or 4.2%) and pteridophytes (15; 2.8%). Division of Magnoliophyta counts 497 species (92.9%), of which Liliopsida accounted for 33.0%, the Magnoliopsida – 67,0%. 22 families, accounted for 73.5% of the flora, has level of species richness above the average (5.5); the remaining 75 families comprise 26.5% of the species. 69.1% of the families consist of up to 3 species and 62.8% of the families are monotypical, indicating a significant synanthropization of flora. A key indicator of the taxonomic structure of flora is a range of leading families and genera, which reflects the main properties of the flora. In general the leading families include 324 species (60.3%) and 134 genera (27.7%). Суреrасеае (54 species or 10.1%), Asteraceae (52; 9.7) and Роасеае (44, 8.2) dominate in the spectrum of leading families, the rest of the spectrum consists of Ranunculaceae (22, 4.1); Apiaceae, Rosaceae, Lamiaceae, Polygonaceae(19, 3.5); Fabaceae(16, 3.0); Brassicaceae, Caryophyllaceae, Scrophulariaceae, Potamogetonaceae (15, 2.8). Genera of Carex (6.7%), Potamogeton (2.8%), Ranunculus (2.4%), Salix (1.9%) and Rumex (1.9%) possess top places of the spectrum of leading genera confirming the studied flora belongs to the moderate Holarctic floras. The prevalence of boreal genera (Carex, Juncus, Potamogeton) over genera of different geographical distribution (Veronica, Galium et al.) in the generic spectrum indicates the tendency towards boreal character of flora. It was established that the flora of aquatic and wetland ecosystems of Podolia is characterized by a large species and generic variety, which is confirmed by taxonomic range of leading genera and families, and, in general, inclination towards boreal floras. The high position of major taxa Суреrасеае, Asteraceae, Carex, Potamogeton in the spectrum shows the synanthropization of studied flora and displacement of its taxonomic structure because of anthropogenic impact.
Authors and Affiliations
О. М. ОПТАСЮК, Л. Г. ЛЮБІНСЬКА
Keywords
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