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The use of Zipf’s – Pareto law to describe the structure of soil cover of Bryansk Opoljeтезисы доклада
- Авторы: Vera Samsonova, Dmitry Krotov, Joulia Meshalkina, Victor Voronin
- Сборник: Abstract Book of Conference Pedometrics-25 of the IUSS pedometrics comission and five working groups. Wageningen, Netherlands. 2017
- Тезисы
- Год издания: 2017
- Место издания: Wageningen, Netherlands
- Первая страница: 214
- Последняя страница: 214
- Аннотация: The soil cover of any landscape is, on the one hand, a continuous formation, on the other hand, it may be considered as a set of different soils on some hierarchical level of a soil classifcation. Analysis of correspondence between the entities of a soil classifcation and the soil cover allowed E. Dmitriev (1988) to propose the concept of pedo-coenosis. The Zipf’s –Pareto law is used in biology to describe the structure of coenoses. This law is widely applied in various scientifc felds for the analysis of community structure in a broad sense. The study was performed on example of the Bryansk region landscapes, which are the part of the Russian Plain. Peculiarities of soil units’ areas distribution on the soil maps of scale 1:50,000 were studied. The main features of the Opolje are a relatively high location (elevation marks about 180-200m above the sea level) and the presence of loess-like loams. The soil cover is dominated by automorphic gray forest soils (Phaeozems Albic), to date almost completely under cultivation. Light erodibility of loess-like loams causes the development of erosion processes. The hydromorphic analogues of gray forest soils (Phaeozems Gleyic) were associate to depressions. A small amount of sod-podzolics soils (Albeluvisol Umbric) and alluvials meadow soils (Fluvisols Umbric) were marked as part of the territory. Three areas of Bryansk Opolje were studied. The number of allocated soil map units was 220, 303 and 417, respectively. The areas of the units ranged from 2800 m2 to 1 ha. Rank-order graph of the logarithms of the areas of the soil maps units of all three sites under consideration to the rank logarithms consisted of several linear segments. The coefcients of determination for each of them were higher than 0.95, provided that even for the shortest segment the sample volume exceeded 30 values. The frst line segment corresponded to the soil map units with the largest area. It was a few map units with not eroded gray forest soils and complexes of gullies and ravines soils. In the middle part of the graph gray forest soils and gray forest gleyic and gley soils with little participation of sod-podzolics soils were placed. Gray forest soils with different degrees of erosion appeared more often with the rank increasing. The last graph segment corresponds to the map units of a very small area arising as a result of mapping errors or when digitizing paper map.
- Добавил в систему: Мешалкина Юлия Львовна