VOIRS AND WATERCOURSES BETWEEN THE LENA AND VILYUI RIVERS (YAKUTIA)

This study of phytoplankton from 11 different types of water bodies in the Lena-Vilyui interfluve revealed 149 species and varieties of Bacillariophyta from 48 genera, including 18 species new to the flora of Yakutia and 9 — to the flora of Russia and 22 forms were identified to the genus. The studied water bodies and watercourses turned out to be poor in terms of taxonomic richness and the number of species in them varied from 9 to 35. The highest species richness was recorded in the genera Eunotia (11), Gomphonema (14) and Pinnularia (26).