The Ontogenesis and Structure of Population of Rindera tetraspis Pall. (Boraginaceae) in Orenburg Oblast
In: Arid ecosystems, Band 13, Heft 4, S. 412-418
ISSN: 2079-0988
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In: Arid ecosystems, Band 13, Heft 4, S. 412-418
ISSN: 2079-0988
In: Proceedings of the Latvian Academy of Sciences. Section B. Natural, Exact, and Applied Sciences., Band 74, Heft 6, S. 385-395
ISSN: 1407-009X
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.
In: Сибирский экологический журнал, Band 28, Heft 5, S. 557-568