Issues:
Sections:
Issue 87
GENERAL BIOLOGY
UDK: 502.5:550.461(470.61+282.247.366)
INFLUENCE OF MODERN LOW WATER PERIOD ON THE COASTAL LANDSCAPES OF THE DON DELTA AND THE PROLETARSK RESERVOIR OF THE WESTERN MANYCH
GRIGORENKO Klim S.,
SOROKINA Vera V.,
SHEVERDYAEV Igor V.,
SOLTAN Alexey A.,
SUSHKO Kirill S.
The paper sets the task of studying the processes occurring in the coastal zones of the Don delta and the Proletarsk reservoir (Lake Manych-Gudilo). The objects were not chosen by chance, the Don Delta and Western Manych are characterized by large areas susceptible to periodic flooding and drying. In both cases, salinization is recorded, the overall cause of which is a decrease in the water content of the Don. The paper briefly describes the ongoing changes on the examples of the reduction in water surface areas and geochemical indicators of coastal landscapes in the period from 1985 to 2022. It is shown that meadow and meadow-alluvial soils of large watercourses were transformed into thin alluvial layered soils. The intensification of agricultural activity in the study area primarily affected the indicators characterizing fertility - humus content, thickness of the humus horizon, soil density and dry residue. It was revealed that all soils subject to anthropogenic load have a low degree of humus content (no more than 2,42%) compared to soils without grazing. In the reference protected areas (Vodny and Gorely islands), this indicator corresponds to the average degree of humus content - 3,55%. The area of soil areas with less than 2% humus accounts for 31% of the study area, including soils with catastrophic losses of humus (less than 1%).
Pages: 24 - 29
Date: 26.12.2022