Variations in the stable carbon isotopic composition of soil organic matter in mountain depressions of the Cis-Baikal region

Golubtsov, V.A.; Cherkashina, A.A.; Vanteeva, Y.V.; Voropay, N.N.; Turchinskaya, S.M.

Авторы: Golubtsov V.A., Cherkashina A.A., Vanteeva Yu V., Voropay N.N., Turchinskaya S.M.
Журнал: Contemporary Problems of Ecology
Том: 16
Номер: 6
Год издания: 2023
Издательство: Maik Nauka/Interperiodica Publishing
Местоположение издательства: Russian Federation
Первая страница: 776
Последняя страница: 789
DOI: 10.1134/S1995425523060094
Аннотация: Depth-profile and spatial variations of the stable carbon isotopic composition of soil organic matteris analyzed to identify the main factors that determine the dynamics of organic carbon in the mountaindepression environments of the Baikal Region. Soil organic matter is characterized by δ13С values from –29.6 to –24.9‰. Variations in δ13C in the altitudinal profile correlate well with changes in landscapes and reflect the influence of climatic factors on 13C discrimination during photosynthesis of C3 plants. Soils of subalpineand steppe landscapes are characterized by the heaviest stable carbon isotopic composition. Taiga soils are depleted of the isotopic composition by 13C. To compare the soil carbon turnover intensity, δ13C values were linearly regressed against log-ransformed carbon contents yielding absolute values of these slopes (β). The distribution of β values in the altitudinal profile suggests a reduced intensity of carbon turnover in the soils of teppes and the subalpine belt due to insufficient moisture and temperature, respectively. Under the taiga conditions characterized by a more favorable ratio of temperatures and humidity, the dynamics of soil organic matter is mainly controlled by the litter quality and the nitrogen availability.
Добавил в систему: Турчинская София Михайловна

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Variations in the stable carbon isotopic composition of soil organic matter in mountain depressions of the Cis-Baikal regionстатья Исследовательская статья

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