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
Abramova, L.M., Russian Academy of Sciences, Ufa (Russian Federation). South-Ural Botanical Garden-Institute | Ilyina, V.N., Samara State Univ. of Social Sciences and Education (Russian Federation) | Mitroshenkova, A.E., Samara State Univ. of Social Sciences and Education (Russian Federation) | Mustafina, A.N., Russian Academy of Sciences, Ufa (Russian Federation). South-Ural Botanical Garden-Institute | Shigapov, Z.H., Russian Academy of Sciences, Ufa (Russian Federation). South-Ural Botanical Garden-Institute
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.
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