Zoning of Desert, Steppe, Steppe-Forest and Forest Ecosystems By Carbon And Nitrogen Isotope in Mongolia and Western Transbaikalia
https://doi.org/10.24057/2071-9388-2023-2720
Abstract
The Mongolian–Transbaikalian region of the Central Asia is known for its wide range of intracontinental ecosystems from desert through steppe to taiga forest and mountain tundra. Data on the isotopic composition of carbon and nitrogen in the bone and dental tissues of herbivorous animals inhabiting the desert, steppe, and forest–steppe landscapes of Outer Mongolia and Western Transbaikalia are presented. The maximum values of the carbon isotope ratio are observed in animals from the desert (Gobi Desert) and the semi-desert landscapes, median (mean) δ13C is -17.9‰. The minimum values of δ13C were obtained by herbivorous animals of the forest-steppe and the forest landscapes (Transbaikalia), which median δ13C is -23‰. The fauna of the steppes (median δ13C is -21.7‰) has intermediate values of the carbon isotopic composition. According to the isotope composition of nitrogen, the isotope-geochemical isolation of ecosystems is less pronounced.
Keywords
herbivorous animals,
carbon and nitrogen stable isotope,
ecosystem zoning,
Mongolia,
Western Transbaikalia
Supporting agencies: This work was supported by Russian Science Foundation grant #23-28-01348. We thank professor Valentin N. Golosov, professor Yaroslav V. Kuzmin and the anonymous reviewer for useful comments that helped to improve the paper
About the Authors
A. M. Khubanova
Dobretsov Geological Institute of Siberian Branch of Russian Academy of Sciences (GIN SB RAS)
Russian Federation
Russian Federation
Anna M. Khubanova
6a, Sakh’yanovoy str., Ulan-Ude, Buryatia, 670047
V. B. Khubanov
Dobretsov Geological Institute of Siberian Branch of Russian Academy of Sciences (GIN SB RAS)
Russian Federation
Russian Federation
Valentin B. Khubanov
6a, Sakh’yanovoy str., Ulan-Ude, Buryatia, 670047: +79246501514
D. A. Miyagashev
Institute of Mongolian, Buddhist and Tibetan Studies of Siberian Branch of Russian Academy of Sciences (IMBTS SB RAS)
Russian Federation
Russian Federation
Denis A. Miyagashev
6, Sakh’yanovoy str., Ulan-Ude, Buryatia, 670047
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Review
For citations:
Khubanova A.M., Khubanov V.B., Miyagashev D.A. Zoning of Desert, Steppe, Steppe-Forest and Forest Ecosystems By Carbon And Nitrogen Isotope in Mongolia and Western Transbaikalia. GEOGRAPHY, ENVIRONMENT, SUSTAINABILITY. 2023;16(3):14-31. https://doi.org/10.24057/2071-9388-2023-2720
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