age structure

The results of the analysis of ontogenetic and vitality structure of Сalophaca wolgarica (L. fi l.) DC. – a rare relict plant species, a paleoendemic to South-Eastern Europe – are presented. As part of the monitoring of the condition of this species’ populations, 21 natural populations on the territories of Volgograd and Rostov regions, the Republic of Kalmykia, Stavropol Krai, as well as fi ve reintroduced populations on the territory of Saratov region were studied in 2024. The ontogenetic conditions of the plants were determined.

The article discusses the dynamics of the age structure of coppice tree stands of upland oak-groves of the southern part of Privolzhskaya Vozvyshennost’. Data is provided about fifteen sample plots which were laid in three forest areas of the Saratov region in the most common types of forest conditions (C1 , C1-2 and D1 ). Age was determined for all trees on the sample plot by the cores taken by age borer at the root collar.