Peculiarities of Soils on the Sand Bar of the Evpatoria Group of Lakes

Fedor Lisetskii
2017 Biogeosystem Technique   unpublished
Ecosystems on the accumulative forms of relief occupy only 9 % of the total length of the coastal line of the Crimean Peninsula and they have become particularly vulnerable in the coastal areas, which are highly in demand for recreational purposes. The study had a goal-to study the morphological structure and physicochemical properties of uneven-aged soils, which are formed on the accumulative forms of the coasts of the NorthWestern Crimea. Estimation of the time of stabilization of undisturbed
more » ... tion of undisturbed sections of transplantations under the conditions of continuous formation of soil-vegetation cover was made according to the average values of the thickness of the humus horizon of soils. Due to the low productivity of vegetation, which can be fixed on sands, the average rates of formation of the humus horizon of soils of the Crimean floods are low and vary from 0.54 to 1.55 mm/year, depending on the duration of pedogenesis. The study of the soil and plant covers on seven a narrow sand bar of the Evpatoria group of lakes showed a low morphological maturity of the formed soils (with age that is rarely more than a century) and its difference from the more differentiated functional maturity, which is due to the different content of carbonates. A relationship was established between the thickness of the humus horizon of the soils and the functional maturity (13 macro-and microelements accumulated as a result of pedogenesis) for soils with a calcium oxide content of not more than 18 %. The list of the most informative geochemical coefficients that generalize all scenarios of soil formation during renaturation of sands on the accumulative forms of the Black Sea coast was proposed. It is shown that the differences between the morphological and functional maturity of soils on sands are due to the inclusion of soil masses from the preceding stages of pedogenesis into modern profiles in conditions of high dynamism of pedolitogenesis, primarily due to active eolian processes in the coastal zone.