Features of phytocenoses dominated by species of Chenopodiaceae family (Amaranthaceae s. l.) of the desert part of the Syrdarya river valley
УДК 582.662+581.552(282.255.2)(574.54)
Abstract
The Chenopodiaceae (Amaranthaceae s. l.) family belongs to the largest and most ancient families of deserts of Kazakhstan and the whole globe. It occupies a leading position in the spectrum of the desert flora families of the Republic. A number of representatives of the family, being dominants and edificators of many desert communities, play an important role in the composition of vegetation cover. The objects of the study are phytocenoses with the participation and dominance of species of the Chenopodiaceae family growing in the desert part of the Syrdarya River valley. Classical botanical methods were used in the research process. Vegetation was studied using traditional methods of field geobotanical research. The standard area of the described plots is 15 х 15 m. The purpose of the study is to identify the phytocenotic features of the family Chenopodiaceae species on the example of the desert part of the Syrdarya River valley. The study of the phytocenotic features of the misty valleys of the Syrdarya River showed that communities in which the percentage of species of the Chenopodiaceae family is 80-100 % are characteristic of strongly and very strongly saline areas of clay deserts. In sparsely and unsalted sandy deserts, the proportion of Chenopodiaceae representatives in the vegetation cover reaches 20 % in spring, and increases to 50-60 % in autumn. In such communities as Salsoletum orientale, Anabasietum salsa, etc., the smallest fluctuation in the percentage of species participation was recorded.
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