SPECIES composition OF ALGAE IN THE TRIBUTARIES OF LAKE AZAS AND THE TOORA-KHEM RIVER (REPUBLIC OF TYVA)
Yuriy V. Naumenko1, D. Nazyn Chechekmaa2
1Central Siberian Botanical Garden SB RAS, Novosibirsk, Russia
2Center for Biosphere Research, Kyzyl, Russia
Keywords: algal flora of the tributaries of Lake Azas, the Toora-Khem River, ecological and geographical analysis, saprobity, Republic of Tyva
Abstract
This is the first report on the algae of a number of tributaries of Lake Azas and the Toora-Khem River in the Republic of Tyva. A list of algae has been compiled, including 227 species and subspecies belonging to 88 genera, 45 families, and 9 divisions. It has been revealed that diatoms make up the basis of the algal flora. Eighteen dominant species have been identified. An ecological and geographical analysis of the algae in these watercourses has been conducted. It was established that the algal flora of rivers is represented by benthic species, with a predominance of indifferent forms in relation to halobity and the active reaction of the environment. In all the studied watercourses, 166 species were identified as indicators of water saprobity. A predominance of betamesosaprobionts and oligosaprobionts was noted. In terms of geography, cosmopolitan and boreal species dominated.
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