Flora of the Kharbey Lakes (the East of Bolshezemelskaya Tundra)

В статье представлены результаты изучения состава и структуры флоры Харбейских озёр (восток Большеземельской тундры) и выявления её характерных особенностей. Флору Харбейской озёрной системы формирует 91 вид. Из них 65 видов сосудистых растений, 25 видов мохообразных и 1 вид харовых водорослей. На мелководьях оз. Большой Харбей отмечен редкий для Европейского Северо-Востока России вид – Potamogeton subretusus. Ведущие позиции по числу видов среди сосудистых растений занимают семейства Poaceae, Potamogetonaceae, Cyperaceae и Ranunculaceae. Среди мохообразных – Calliergonaceae, Sphagnaceae и Mniaceae. В гидроэкологическом спектре флоры сосудистых растений и мохообразных наблюдается явное преобладание гигрофитов. Соотношение трофоэкологических групп флоры демонстрирует её приуроченность к мезотрофным местообитаниям. Географическая структура флоры Харбейских озёр – как сосудистых, так и мохообразных – в полной мере отражает их зональное положение: среди сосудистых преобладают виды арктоумеренной широтной группы, среди мохообразных – бореальной с участием гипоарктических видовThe paper contains the data on composition and structure of the Kharbey Lakes’ flora (the east of Bolshezemelskaya tundra) and its specific features. Flora of the Kharbey Lakes includes 91 species. Among them, there are 65 species of vascular plants, 25 species of bryophytes, and 1 species of charophytes. Potamogeton subretusus, which is a rare species for the European North-East of Russia, was found in shallow places of the Bolshoi Kharbey Lake. The Poaceae, Potamogetonaceae, Cyperaceae and Ranunculaceae families among vascular plants and Calliergonaceae, Sphagnaceae and Mniaceae among bryophytes have the greatest number of species. In the hydroecological aspect, vascular plants and bryophytes are dominated by hygrophytes. From the trophoecological point of view, flora usually includes mesotrophic groups of plants. By its geographical structure, the Kharbey Lakes’ flora corresponds with its zonal position as vascular plants are dominated by representatives of the Arctic-temperate latitude group and bryophytic plants are dominated by the boreal group with some hypo-arctic specie

Aquatic and helophyte vegetation of the Donty Lake (The Komi Republic)

The results of a syntaxonomical study of plant communities of the large lake Donty (North-East of the European part of Russia) are presented. The diversity of hydrophytic vegetation has been classified into 3 classes (Lemnetea, Potametea and Phragmito-Magnocaricetea), 5 orders, 8 alliances, 20 associations and 1 community. Subasso­ciation Scolochloetum festucaceae caricetosum aquatilis is new. Communities of associations Caricetum aquatilis, Equisetetum fluviatilis, Potamo—Nupharetum luteae, Potametum perfo­liati are mostly wide distributed, while these of Phragmitetum communis, Scolochloetum festucaceae ones are relatively rare as well as Lemno—Spirodeletum polyrchizae, Elodeo—Potametum alpini, Potamo—Nupharetum pumilae, Potametum praelongi and Scirpetum lacustris are very rare. Some communities contain 2 regional rare species: Scolochloa festucacea and Ranunculus lingua.</jats:p

Аquatic and helophytic vegetation of the Yamozero Lake (The Komi Republic)

The results of a sintaxonomical study of plant communities of the Yamozero lake (the North-East of the European part of Russia) are presented. The diversity of the aquatic and helophytic vegetation of the Yamozero lake consists of 16 associations and 2 communities of 6 unions, 4 orders and 2 classes of the floristic classification: Potamogetonetea (7 associations, 2 communities), Phragmito-Magnocaricetea (9 associations). Many of described associations are widely distributed in the Central and the Eastern Europe. Some associations have the boundaries of their ranges. Some communities include 2 rare species of regional level: Isoetes setacea and Sagittaria natans.</jats:p