Habibov A.D., Mallaliev M.M. The Role of the Mode of Use of the Ecosystem in the Structure of Vasiability of Some Elements of Seed Productivity of Endemic of Dagestan – Astragalus Fissuralis // Arid ecosystems. 2020. V. 26. № 3 (84). P. 69-70. | PDF

A comparative analysis and assessment of the structure of variability of eight (dimensional, numerical, weight and index) features of seed productivity of two different heights (1100 and 1750 m above the SD. M.) populations of vegetative rolling stock representative of the woody flora and endangered shrubs RF and RD – Astragalus fissuralis Alexeenko (Fabaceae) from the middle mountain belt middle of mountain Dagestan are presented. The work was carried out at the population level. As a result of the summary statistics, correlation and dispersion analyses, the differences in the average indicators of the features and the impact of the anthropogenic factor – the mode of ecosystem use on the variability of these features of seed productivity, directly related to the adaptive strategy, were identified and evaluated. It is established that in the relatively unfavorable natural conditions plants of this rare species develop relatively short beans with a small (one or two) number of seeds, but they are larger than seeds of the introducers. At the same time, in natural conditions, in contrast to protected areas, the share of weight characteristics associated with the adaptive (reproductive) strategy and the effectiveness of reproductive efforts is increasing (the mass of seed and seeds from the fetus, the share of seed mass from the fetus allocated to reproduction itself).

However, it is marked that in the relatively better conditions of introduction of plants of this endemic of Dagestan and Russia, both of different heights (1750 and 1100 m above sea level. m) the sections of the experimental bases of Mountain Botanical garden, Dagestan Federal Research Centre of RAS develop vegetative mass, increases its dimension (long fruit), numeric (increases the number of relatively light and small seeds) and, consequently, the weight (the fruits become heavy) signs. In other words, when introduced, the development is obtained by the size (geometric values) of the fruit, and in natural conditions – weight (physical indicators) signs of the bean and seed. It is established that the variability of these features of the generative sphere is significantly affected by the mode of use of the ecosystem and the strength of the influence of this anthropogenic factor ranges from 23.6 to 79.3 %.

Keywords: Astragalus fissuralis, characteristics of seed production, size, weight, number, and index signs, fruit, seed, summary statistics, correlation and variance analyses.

DOI: 10.24411/1993-3916-2020-10108