gesjGEOGRAPHY, ENVIRONMENT, SUSTAINABILITYGEOGRAPHY, ENVIRONMENT, SUSTAINABILITY2071-93882542-1565Russian Geographical Society10.24057/2071-9388-2023-2720gesj-3071Research ArticleRESEARCH PAPERСтатьиZoning of Desert, Steppe, Steppe-Forest and Forest Ecosystems By Carbon And Nitrogen Isotope in Mongolia and Western TransbaikaliaKhubanovaA. M.

Anna M. Khubanova

6a, Sakh’yanovoy str., Ulan-Ude, Buryatia, 670047

KhubanovV. B.

Valentin B. Khubanov

6a, Sakh’yanovoy str., Ulan-Ude, Buryatia, 670047: +79246501514

khubanov@mail.ruMiyagashevD. A.

Denis A. Miyagashev

6, Sakh’yanovoy str., Ulan-Ude, Buryatia, 670047

Dobretsov Geological Institute of Siberian Branch of Russian Academy of Sciences (GIN SB RAS)Russian FederationInstitute of Mongolian, Buddhist and Tibetan Studies of Siberian Branch of Russian Academy of Sciences (IMBTS SB RAS)Russian Federation2023081020231631431Copyright © Khubanova A.M., Khubanov V.B., Miyagashev D.A., 20232023Khubanova A.M., Khubanov V.B., Miyagashev D.A.Khubanova A.M., Khubanov V.B., Miyagashev D.A.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://ges.rgo.ru/jour/article/view/3071

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.

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The authors declare that there are no conflicts of interest present.