Academic Journal
Microbial Communities of Ferromanganese Sedimentary Layers and Nodules of Lake Baikal (Bolshoy Ushkany Island)
| العنوان: | Microbial Communities of Ferromanganese Sedimentary Layers and Nodules of Lake Baikal (Bolshoy Ushkany Island) |
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| المؤلفون: | Tamara Zemskaya, Natalia Konstantinova, Olga Shubenkova, Tatyana Pogodaeva, Vyacheslav Ivanov, Sergei Bukin, Andrey Khabuev, Oleg Khlystov, Grigory Vilkin, Anna Lomakina |
| المصدر: | Diversity, Vol 14, Iss 868, p 868 (2022) |
| بيانات النشر: | MDPI AG |
| سنة النشر: | 2022 |
| المجموعة: | Directory of Open Access Journals: DOAJ Articles |
| مصطلحات موضوعية: | microbial communities, diversity of 16S rRNA sequences, Fe-Mn nodules, deep sediments, Lake Baikal, chemical composition, Biology (General), QH301-705.5 |
| الوصف: | Ferromanganese (Fe-Mn) sedimentary layers and nodules occur at different depths within sediments at deep basins and ridges of Lake Baikal. We studied Fe-Mn nodules and host sediments recovered at the slope of Bolshoy Ushkany Island. Layer-by-layer 230 Th/U dating analysis determined the initial age of the Fe-Mn nodule formation scattered in the sediments as 96 ± 5–131 ± 8 Ka. The distribution profiles of the main ions in the pore waters of the studied sediment are similar to those observed in the deep-sea areas of Lake Baikal, while the chemical composition of Fe-Mn nodules indicates their diagenetic formation with hydrothermal influence. Among the bacteria in microbial communities of sediments, members of organoheterotrophic Gammaproteobacteria , Chloroflexi , Actinobacteriota , Acidobacteriota, among them Archaea —chemolithoautotrophic ammonia-oxidizing archaea Nitrososphaeria , dominated. About 13% of the bacterial 16S rRNA gene sequences in Fe-Mn layers belonged to Methylomirabilota representatives which use nitrite ions as electron acceptors for the anaerobic oxidation of methane (AOM). Nitrospirota comprised up to 9% of the layers of Bolshoy Ushkany Island. In bacterial communities of Fe-Mn nodule, a large percentage of sequences were attributed to Alphaproteobacteria, Actinobacteriota and Firmicutes , as well as a variety of OTUs with a small number of sequences characteristic of hydrothermal ecosystems. The contribution of representatives of Methylomirabilota and Nitrospirota in communities of Fe-Mn nodule was minor. Our data support the hypothesis that chemolithoautotrophs associated with ammonium-oxidizing archaea and nitrite-oxidizing bacteria can potentially play an important role as primary producers of Fe-Mn substrates in freshwater Lake Baikal. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| تدمد: | 1424-2818 |
| Relation: | https://www.mdpi.com/1424-2818/14/10/868; https://doaj.org/toc/1424-2818; https://doaj.org/article/43cd068c4617416cab3aafc78fb6ddc2 |
| DOI: | 10.3390/d14100868 |
| الاتاحة: | https://doi.org/10.3390/d14100868 https://doaj.org/article/43cd068c4617416cab3aafc78fb6ddc2 |
| رقم الانضمام: | edsbas.6032D745 |
| قاعدة البيانات: | BASE |
Full Text Finder | تدمد: | 14242818 |
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| DOI: | 10.3390/d14100868 |