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Complex investigation of a soil microcatena across gilgai microrelief to reconstruct environmental changes.

IreneKOVDA  OlgaCHICHAGOVA  AlexandraGOLYEVA  Yaroslav RYSKOV  
【摘要】:正 This paper outlines a detailed study to obtain data on the age and paleoenvironmentof Vertisols in order to reconstruct the history of the landscape and soils of the North Caucasusregion of south Russia. Data are from a sequence of three Vertisol pedons - the depression, themicroslope, and the mound of a gilgai complex. Soils are formed on Neogene marine clays understeppe vegetation. Rradiocarbon, stable isotope, botanical and biolith data reveal the paleoecologyof the region during the Holocene up to the present. The environment included a drier periodindicated by humus, a warmer and wetter period indicated by carbonate nodules, and a morehumid and cool period indicated by forest grass species and Comarum Pallustre. Microreliefgilgai aids for the environmental reconstructing. The soil profile in the depression supplies themost complete information. Nevertheless, it is necessary to study the whole gilgai complex toobtain full and reliable data for the environmental changes.This approach is expected to beuseful for environmental reconstruction of other soils with microrelief.

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