A regional-scale estimate of the soil organic carbon isotopic composition (δ13c) and its environmental drivers: case study of the Baikal region
| Autor: | Viktor A. Golubtsov, Yulia V. Vanteeva, Anna A. Cherkashina |
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| Jazyk: | angličtina |
| Rok vydání: | 2024 |
| Předmět: | |
| Zdroj: | Geography, Environment, Sustainability, Vol 17, Iss 2, Pp 78-93 (2024) |
| Druh dokumentu: | article |
| ISSN: | 2071-9388 2542-1565 |
| DOI: | 10.24057/2071-9388-2024-3091 |
| Popis: | Modern plants and surface soil δ13С values from 95 sites in the Baikal region were obtained for the first time and were used to establish relationships with regional environmental factors. Studied sites were distributed along the elevation gradient from 403 to 2315 m, which defined a strong landscape and climatic gradients encompassing mountain tundra, subalpine grasslands, mountain taiga, subtaiga, and steppe. δ13С values of soil organic matter (SOM) varied from –29.50 to –22.98‰. This result showed that the stable C isotopic composition of the surface soils was mainly determined by δ13С values of C3 plants (vary from –33.0 to –24.5‰) and C isotope fractionation during stabilization of plant-derived C into SOM. The δ13С values of modern plants and surface soils were negatively correlated with mean annual and growing season precipitation (p |
| Databáze: | Directory of Open Access Journals |
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