Phytocenotic characteristics of Dracocephalum jacutense Peschkova habitats on the territory of Yakutia
УДК 58.084.2(571.56)
Abstract
On the territory of the Republic of Sakha (Yakutia) there are 5 species of the genus Dracocephalum L., of which Dracocephalum palmatum Stephan ex Willd. and Dracocephalum jacutense Peschkova are the objects of our research. An endangered plant species, Dracocephalum jacutense, is a nodular endemic to the Republic of Sakha (Yakutia). It grows only in a separate area - near the village Sangar, Kobyaisky district. Route surveys on the distribution area of this endangered species were carried out in conditions of preserved natural populations in July 2022 and August 2023. Only three locations of the study object were discovered in forb meadow and steppe communities, on which geobotanical relevees were made. Experimental plots measuring 10 х 10 m2 were represented by a grass-snakehead, a grass-forb and a grass-forb steppe meadow. The average total projective coverage in phytocenoses was 50 %. On average, 18-19 plant species were represented at the experimental plots.
During a survey in 2023, there was an increase in the projective cover of Dracocephalum jacutense by 5 times compared to the indicators in 2022. In all described phytocenoses, in addition to the object of study, 13 common plant species were represented, which may indicate the specific growing conditions of the endangered plant species Dracocephalum jacutense.
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