Sterlyagova I., Shabalina J., 2017: Algae in sphagnum epiphyton from the mires of the Subpolar Urals [Kiminų epifitono dumbliai subpoliarinio Uralo pelkėse]. -Bot. Lith., 23(1): 3-16.Species diversity of algal communities of sphagnum epiphyton was studied in six mountain and plain mires of the Subpolar Urals (Russia). A total of 154 species and intraspecific taxa from six divisions were identified. The highest species richness was recorded for Bacillariophyta (96 taxa) and Charophyta (33) divisions. Species Kobayasiella parasubtilissima, Tabellaria flocculosa and Eunotia lunaris had high abundance. Dominant communities were often formed by Eunotia lunaris, E. mucophila, Kobayasiella parasubtilissima and Pinnularia subcapitata. CCA analysis showed that conductivity and altitude above the sea level are the main factors affecting the development of algae in the studied mires.

The first data on algae from some aquatic and terrestrial ecosystems of the southern taiga on the territory of the Koigorodsky National Park (Komi Republic, Russia) showed a fairly diverse composition of these organisms: in the aquatic ecosystems of the park, 194 taxa were identified with intraspecific varieties and forms from six divisions with a significant predominance of representatives Bacillariophyta (68%); in forest phytocenoses, 27 taxa with a rank below the genus of soil algae from four divisions and seven classes were found, mainly from the Chlorophyta division (63%). Three new species of soil algae were found for the European northeast: Phormidium coutinhoi J.Sampaio, Chlamydomonas cf. inepta Ettl, cf. Kentrosphaera sp.

This paper summarized the literature and original data about the species diversity of diatoms in the soils of the Northeastern European Russia. The list of species includes 142 species, from 2 classes, 13 orders, 25 families and 44 genera. Eunotia fallax, Nitzschia palea, Pinnularia borealis, P. subcapitata had a highest frequency of occurrence. The largest number of species found in the coastal ecotones of lakes in the valley of the river Vangyr and in mountain-tundra soils in the Subpolar Urals.