Analysis of the diversity of the aquatic flora of the Sok basin

The article summarizes the results of long-term hydrobotanical monitoring of reservoirs and watercourses of the Sok River basin. When studying and analyzing the flora, not only the aquatic flora (hydrophytes, helophytes and hygrogelophytes) was taken into account, but the flora of reservoirs as a whole, with the inclusion of near-aquatic plant species (hygrophytes, hygromesophytes and mesophytes). In addition, the flora analysis was carried out separately for the aquatic core and the coastal flora in order to have a more complete understanding of the actual aquatic component of the flora. As a result of the flora inventory, 203 plant species from 53 families and 98 genera were registered. The Charophyta division contains 13 species from 3 genera and 3 families. Bryophyta division includes 12 species from 10 genera and 9 families. The Equisetophyta division contains 3 species, and Polypodiophyta contains one species. The Magnoliophyta division includes 174 plant species. 94 species belong to the Magnoliopsida class, 80 species belong to Liliopsida. The leading flora families are Poaceae, Cyperaceae and Asteraceae, they contain 23, 19 and 15 species, respectively. The two most numerous genera in terms of species include Potamogeton and Carex (10 and 9 species). The aquatic core of the flora includes 46 species from 17 families and 21 genera. The coastal flora consists of 157 species from 36 families and 83 genera. For the dynamics of the flora of R. However, in recent years, there has been a greater increase in the number of species of near-aquatic flora: the number of hygrophytes has increased by 21 species, and an additional 10 species have been registered among hygromeso- and mesophytes in recent years. In general, for the flora of reservoirs and watercourses of the Sok River basin, it is possible to state a trend of positive dynamics in the species composition of near-aquatic plants due to anemochoric and anthropochoric species, including alien and synanthropic plants. The relative stability of the species composition is characteristic of aquatic plants, especially hydrophytes and helophytes.