Features of the Demographic Structure and the Condition of Populations of the Rare Relic Hedysarum Gmelinii Ledeb. (Fabaceae) in Peripheral and Central Parts of Its Distribution Range

Abstract

The features of the ontogenetic structure of cenopopulations of a rare species Hedysarum gmelinii Ledeb. (Fabaceae) were studied on the periphery of its range (the Middle Volga region and the Bashkir Cis-Urals) and in its central part (the Altai Mountains region). Types of cenopopulations were determined according to the “delta-omega” criterion: in the Bashkir Urals, they were mostly young, in the Middle Volga region, they were mature, in the Altai Mountains, they were maturing. The proportion of pregenerative individuals in populations increases in habitats with high moisture levels. Anthropogenic load (mainly in the form of grazing) had a greater effect on the number and density of individuals, rather than on the type of ontogenetic spectrum of cenopopulations.

Ontogenetic structure of natural populations of rare species of the genus <i>Hedysarum</i> L. in the Volga and Ural regions

“…В последние годы активно изучаются вопросы биохимии, физиологии и морфологии модельных видов этого рода [8][9][10][11][12][13][14][15]. Однако, несмотря на достаточно широкий ареал многих видов, популяционно-онтогенетическое изучение модельных представителей рода Hedysarum осуществляется лишь на небольшой территории [16][17][18][19][20][21][22], а вопросы популяционной экологии копеечников изучаются в Поволжском и Приуральском регионах с 2000 года [23][24][25][26][27][28][29][30][31]. Авторами впервые выявлены особенности пространственной и онтогенетической структуры ценопопуляций пяти представителей рода.…”