Characteristics of the cenopopulations of Festuca rubra L. in the Encyeli valley

УДК 581.522:633.264(1-925.13)

Abstract

This paper characterizes the current state of cenopopulations of the rhizome-loose tussock grass red fescue (Festuca rubra L.) in the middle Lena valley (Ensieli valley), of great agricultural and environmental importance in Central Yakutia. During the study years (2022-2023) ecological and phytocoenotic features of plant communities with cenopopulations of the species were studied. Communities with Festuca rubra are polydominant, the leading role in them belongs to cereals. 64 species from 22 families grow there. The families Poaceae, Asteraceae, Fabaceae, Ranunculaceae and Rosaceae predominate by the number of species. Ecological positions of the studied cenopopulations fit into rather narrow ranges of ecological scales, most of them are wet-meadow, in terms of salinity richness all soils are rather rich with weak influence of pasture degradation. Population characterization is represented by ontogenetic spectra and demographic integral indices. The studied CPs of Festuca rubra are normal, definitive, incomplete. There is a change in the type of the basic spectrum from left-handed in 2022 to bimodal with maxima on groups of virginil and mature medium-generative plants in 2023. According to the “delta-omega” classification, there are only two types of cenopopopulations - young and mature. There is a slight fluctuation of demographic parameters in the cenopopulations during the years of study.