Abstract
In Yakutia, natural floodplain meadows and steppes have long been involved in economic activities. To develop methods of rational use, one needs to constantly consider the state of vegetation, mainly its constituent populations. Our research focuses on studying the dynamics of the vitality of the populations of the Agrostis diluta Kurcz. and steppe Psathyrostachys caespitosa (Sukaczev) Peschkova cereals. These species play an essential role in the composition of vegetation cover. We determined the vitality coefficient IVC. Our study of populations over several years has revealed the dynamic mobility of the vital structure, which is of adaptive significance and ensures the sustainability of populations. We have found that the vital structure of the cereal populations of the meadow Agrostis diluta and the steppe Psathyrostachys caespitosa during long-term studies (2007–2013 and 2007–2016, respectively) is heterogeneous. In unfavorable humidification conditions, we characterize years as depressive. Under favorable conditions of humidification, they quickly turn into thriving plants. In addition to the weather of the vegetation periods, habitat specificity affects the vitality of species populations that differ in ecological and coenotic characteristics. The Q quality index and IVC correspond to each other by year and form a clear descending order during the transition from a thriving to a depressive state. Currently, the vital state of the populations of both species is satisfactory.
Highlights
IntroductionRussia has developed and adopted the "National strategy for the conservation of biodiversity in Russia", the primary purpose of which is to assess the state of biodiversity and develop scientific foundations for its conservation, restoration, and rational use
The issues of biodiversity conservation have recently become relevant
The aim of the paper is to study the dynamics of the vitality of bentgrass (Agrostis diluta Kurcz) and tussock grass populations (Psathyrostachys caespitosa (Sukaczev) Peschkova)
Summary
Russia has developed and adopted the "National strategy for the conservation of biodiversity in Russia", the primary purpose of which is to assess the state of biodiversity and develop scientific foundations for its conservation, restoration, and rational use According to this government document, the most crucial primary conservation objects are individuals (the organismal level), populations (the population level), or the population-species hierarchy, which is the basis for the integrity and stability of natural ecosystems. The aim of the paper is to study the dynamics of the vitality of bentgrass (Agrostis diluta Kurcz) and tussock grass populations (Psathyrostachys caespitosa (Sukaczev) Peschkova) These species play an active role in the composition of meadow and steppe vegetation communities, which have significant resource potential
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