Пожалуйста, используйте этот идентификатор, чтобы цитировать или ссылаться на этот ресурс: http://elar.urfu.ru/handle/10995/111824
Название: Microbial and Geochemical Evidence of Permafrost Formation at Mamontova Gora and Syrdakh, Central Yakutia
Авторы: Cherbunina, M. Y.
Karaevskaya, E. S.
Vasil’chuk, Y. K.
Tananaev, N. I.
Shmelev, D. G.
Budantseva, N. A.
Merkel, A. Y.
Rakitin, A. L.
Mardanov, A. V.
Brouchkov, A. V.
Bulat, S. A.
Дата публикации: 2021
Издатель: Frontiers Media S.A.
Frontiers Media SA
Библиографическое описание: Microbial and Geochemical Evidence of Permafrost Formation at Mamontova Gora and Syrdakh, Central Yakutia / M. Y. Cherbunina, E. S. Karaevskaya, Y. K. Vasil’chuk et al. // Frontiers in Earth Science. — 2021. — Vol. 9. — 739365.
Аннотация: Biotracers marking the geologic history and permafrost evolution in Central Yakutia, including Yedoma Ice Complex (IC) deposits, were identified in a multiproxy analysis of water chemistry, isotopic signatures, and microbial datasets. The key study sections were the Mamontova Gora and Syrdakh exposures, well covered in the literature. In the Mamontova Gora section, two distinct IC strata with massive ice wedges were described and sampled, the upper and lower IC strata, while previously published studies focused only on the lower IC horizon. Our results suggest that these two IC horizons differ in water origin of wedge ice and in their cryogenic evolution, evidenced by the differences in their chemistry, water isotopic signatures and the microbial community compositions. Microbial community similarity between ground ice and host deposits is shown to be a proxy for syngenetic deposition and freezing. High community similarity indicates syngenetic formation of ice wedges and host deposits of the lower IC horizon at the Mamontova Gora exposure. The upper IC horizon in this exposure has much lower similarity metrics between ice wedge and host sediments, and we suggest epigenetic ice wedge development in this stratum. We found a certain correspondence between the water origin and the degree of evaporative transformation in ice wedges and the microbial community composition, notably, the presence of Chloroflexia bacteria, represented by Gitt-GS-136 and KD4-96 classes. These bacteria are absent at the ice wedges of lower IC stratum at Mamontova Gora originating from snowmelt, but are abundant in the Syrdakh ice wedges, where the meltwater underwent evaporative isotopical fractionation. Minor evaporative transformation of water in the upper IC horizon of Mamontova Gora, whose ice wedges formed by meltwater that was additionally fractionated corresponds with moderate abundance of these classes in its bacterial community. © Copyright © 2021 Cherbunina, Karaevskaya, Vasil’chuk, Tananaev, Shmelev, Budantseva, Merkel, Rakitin, Mardanov, Brouchkov and Bulat.
Ключевые слова: ANCIENT DNA
CENTRAL YAKUTIA
HYDROCHEMISTRY
ICE COMLEX
MICROBIAL COMMUNITY
STABLE WATER ISOTOPES
YEDOMA
DATA SET
FREEZING
GEOCHEMICAL SURVEY
HYDROCHEMISTRY
MELTWATER
MICROBIAL COMMUNITY
PERMAFROST
SNOWMELT
WATER CHEMISTRY
RUSSIAN FEDERATION
SAKHA
BACTERIA (MICROORGANISMS)
URI: http://elar.urfu.ru/handle/10995/111824
Условия доступа: info:eu-repo/semantics/openAccess
Идентификатор SCOPUS: 85119404791
Идентификатор PURE: 28948165
ISSN: 2296-6463
Сведения о поддержке: We thank Samsonova Vera, Karzhavin Vladimir, Pankov Alexander, Andreevskaya Maya and Alexander Osipov for their for their invaluable assistance in field work.
Располагается в коллекциях:Научные публикации, проиндексированные в SCOPUS и WoS CC

Файлы этого ресурса:
Файл Описание РазмерФормат 
2-s2.0-85119404791.pdf3,66 MBAdobe PDFПросмотреть/Открыть


Все ресурсы в архиве электронных ресурсов защищены авторским правом, все права сохранены.