Flora of Lake Shirokoe and its environs of the Birsky district of the Republic of Bashkortostan

Birsk branch of the Federal State Educational Institution of Higher Education "Ufa University of Science and Technology", Ufa, Russia

^* Corresponding author: mnn27@mail.ru

Abstract

The article presents an analysis of the flora of Lake Shirokoe and its surroundings of the Birsky district of the Republic of Bashkortostan. It is shown that the flora is represented by 72 species of plants, of which: 8 species of trees, 1 species of shrubs, 2 species of semi-shrubs, 64 species of herbaceous plants. A total of 32 families, 64 genera and 72 species are represented. The most representative family is the Asteraceae, which includes 14 species. Of the small ones, 19 families with 1 species have been registered. Analysis of the flora of Lake Shirokoe shows that its composition is characterized by the predominance of hemicroptophytes - 25 species (34.7%) and cryptophytes - 17 species (23.6%). The least represented are therophytes (9.72%). Phanerophytes are also present in the flora (12.5%). These spectra of life forms belong to the moderately cold zone. The analysis of algae of the lake is carried out. It is represented by 14 species from two divisions (Diatomeae and Chlorophyta). The analysis of phytoplankton of the lake was carried out. It is represented by such species as: Navicula oblonga Kutz, Navicula menisculus Schum, Navicula viridula Kutz, Navicula elegans Schum, Cocconeis pediculus Ehrenberg, Nitzschia sigmoidea Nitzsch, Melosira varians C.Agardh, Pinnularia gibba Ehrenb, Surirella bifida Kütz, Asterionella formosa Hassall. An indicator species of pure water (Melosira varians C.Agardh) was found in water samples.