Ключевое слово: «species diversity»

This article is devoted to the study of the species diversity of cyprinid fish species in the Belyanka River. The article examines the features of the habitat and distribution of cyprinid species, their behavior, as well as the influence of environmental factors on the fish population. Special attention is paid to the analysis of ecological relationships between species and their impact on the biodiversity of the river ecosystem. The results of the study can be useful for understanding and preserving the natural wealth of the Belyanka River and related ecosystems.

The article presents the results of geo-botanical studies on the territory of the Ust-Buotama resource reserve. 45 descriptions were performed (36 meadow, 9 forest). 94 plant species from 26 families were identified. The pasture digression was assessed according to L.G. Ramensky, the productivity was analyzed by the cut method, and the Jaccard coefficients and the synanthropization index were calculated. It was found that 58.3% of the meadow communities are at 3-4 stages of digression, 30.6% are at 5 stages, and 11.1% are at 1-2 stages. In forest phytocenoses, the transformation of native spruce forests into birch forests was observed. The dominant family is Rosaceae (19.15%). The productivity ranges from 75 to 674 g/m², with the lowest values observed in the enclosure with the highest load. The results obtained indicate a high degree of anthropogenic transformation of the vegetation in the Ust-Buotama reserve, and the need to develop measures for regulating grazing in order to preserve biodiversity and restore disturbed communities.

This article examines the species diversity of all pharmacopeia and folk medicinal plants native to Yakutia. The analysiys reveals a significant variety of medicinal plants. The most diverse families are Asteraceae, Ranunculaceae, Rosaceae, Fabaceae, Cyperaceae, Lamiaceae, Polygonaceae, Apiaceae, Chenopodiaceae, Brassicaceae. The work is aimed at systematizing the available information and making up a complete list of medicinal plants of Yakutia. The presented data are intended to serve as a basis for further scientific research in the field of botany, plant ecology, biochemistry and pharmacology. In addition, this article will be useful for students, undergraduates and postgraduates specializing in those fields. It also contributes to the preservation of the unique flora of Yakutia.