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Diversity of pedogenetic processes in Southern Crimeaтезисы доклада
- Авторы: Agadzhanova N., Krasilnikov P.
- Сборник: Abstracts. 21st World Congress of Soil Science
- Тезисы
- Год издания: 2018
- Место издания: Rio de Janeiro, Brasil
- Первая страница: ID 5573-1017
- Аннотация: Complexity and diversity of soilscape is usually assessed either as taxonomic diversity or diversity of functions. In the first case it means a diversity of separate soil classes in systems but it is limited by the frames of classifications under used. In the second case the assessment of diversity is based on specific soils properties, but the set of these properties might differ for different areas. Soil diversity evaluation based on the diversity of pedogenetic processes may be a possible to the approaches listen above. The concept of pedogenetic processes (PP) coined by A. Rode in Russia and R. Simonson in the USA considers movement and transformation of matter in soil profile as a complex of phenomena occurring simultaneously or sequentially. The processes cannot be observed directly but they could be supposed on the basis of available morphological properties or hypothesis base on soil-forming factors. Diversity of PP was studied in two sites in Southern Crimea, a mountainous area with Mediterranean climate. The soils of the first in Nikitsky Botanical Garden were formed on shales and limestone under introduced arboreal vegetation. Young underdeveloped soils prevailed on this site due to perturbation and terracing. The soils of the second site, reserve Cape Martyan, were formed on limestone under natural xerophytic vegetation. There are both deep well-developed terra rossa and shallow, stony soils. In Nikitsky Garden the following set of processes was identified: humus formation, litter accumulation, weak clay illuviation, formation of aggregate structure, leaching of carbonates and bases, physical and chemical weathering, lateral soil erosion. Because of young age of soils the properties are weakly developed. In contrast, the Cape Martyan’s soils are formed in stable conditions for a long time and were not affected by anthropogenic impact. The processes observed in the above mentioned soils are: humus formation, litter accumulation, chemical weathering, rubification, carbonate leaching, karst process. Our pilot research showed that the same processes at different stages of their development produce different morphological products. Relict processes should be also carefully separated from current processes, which affect soil-related ecosystem services.
- Добавил в систему: Красильников Павел Владимирович