Microbial Communities of Ferromanganese Sedimentary Layers and Nodules of Lake Baikal (Bolshoy Ushkany Island)
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 <sup>230</sup>Th/U dating analysis deter...
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MDPI AG
2022-10-01
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| author | Tamara Zemskaya Natalia Konstantinova Olga Shubenkova Tatyana Pogodaeva Vyacheslav Ivanov Sergei Bukin Andrey Khabuev Oleg Khlystov Grigory Vilkin Anna Lomakina |
| author_facet | Tamara Zemskaya Natalia Konstantinova Olga Shubenkova Tatyana Pogodaeva Vyacheslav Ivanov Sergei Bukin Andrey Khabuev Oleg Khlystov Grigory Vilkin Anna Lomakina |
| author_sort | Tamara Zemskaya |
| collection | DOAJ |
| description | 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 <sup>230</sup>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 <i>Gammaproteobacteria</i>, <i>Chloroflexi</i>, <i>Actinobacteriota</i>, <i>Acidobacteriota,</i> among them <i>Archaea</i>—chemolithoautotrophic ammonia-oxidizing archaea <i>Nitrososphaeria</i>, dominated. About 13% of the bacterial 16S rRNA gene sequences in Fe-Mn layers belonged to <i>Methylomirabilota</i> representatives which use nitrite ions as electron acceptors for the anaerobic oxidation of methane (AOM). <i>Nitrospirota</i> 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 <i>Alphaproteobacteria, Actinobacteriota</i> and <i>Firmicutes</i>, as well as a variety of OTUs with a small number of sequences characteristic of hydrothermal ecosystems. The contribution of representatives of <i>Methylomirabilota</i> and <i>Nitrospirota</i> 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. |
| first_indexed | 2024-03-09T20:20:16Z |
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| last_indexed | 2024-03-09T20:20:16Z |
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| spelling | doaj.art-43cd068c4617416cab3aafc78fb6ddc22023-11-23T23:49:05ZengMDPI AGDiversity1424-28182022-10-01141086810.3390/d14100868Microbial Communities of Ferromanganese Sedimentary Layers and Nodules of Lake Baikal (Bolshoy Ushkany Island)Tamara Zemskaya0Natalia Konstantinova1Olga Shubenkova2Tatyana Pogodaeva3Vyacheslav Ivanov4Sergei Bukin5Andrey Khabuev6Oleg Khlystov7Grigory Vilkin8Anna Lomakina9Limnological Institute, Siberian Branch of the Russian Academy of Sciences (LIN SB RAS), 664033 Irkutsk, RussiaInstitute for Geology and Mineral Resources of the Ocean (VNIIOkeangeologia), 190121 St. Petersburg, RussiaLimnological Institute, Siberian Branch of the Russian Academy of Sciences (LIN SB RAS), 664033 Irkutsk, RussiaLimnological Institute, Siberian Branch of the Russian Academy of Sciences (LIN SB RAS), 664033 Irkutsk, RussiaLimnological Institute, Siberian Branch of the Russian Academy of Sciences (LIN SB RAS), 664033 Irkutsk, RussiaLimnological Institute, Siberian Branch of the Russian Academy of Sciences (LIN SB RAS), 664033 Irkutsk, RussiaLimnological Institute, Siberian Branch of the Russian Academy of Sciences (LIN SB RAS), 664033 Irkutsk, RussiaLimnological Institute, Siberian Branch of the Russian Academy of Sciences (LIN SB RAS), 664033 Irkutsk, RussiaInstitute for Geology and Mineral Resources of the Ocean (VNIIOkeangeologia), 190121 St. Petersburg, RussiaLimnological Institute, Siberian Branch of the Russian Academy of Sciences (LIN SB RAS), 664033 Irkutsk, RussiaFerromanganese (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 <sup>230</sup>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 <i>Gammaproteobacteria</i>, <i>Chloroflexi</i>, <i>Actinobacteriota</i>, <i>Acidobacteriota,</i> among them <i>Archaea</i>—chemolithoautotrophic ammonia-oxidizing archaea <i>Nitrososphaeria</i>, dominated. About 13% of the bacterial 16S rRNA gene sequences in Fe-Mn layers belonged to <i>Methylomirabilota</i> representatives which use nitrite ions as electron acceptors for the anaerobic oxidation of methane (AOM). <i>Nitrospirota</i> 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 <i>Alphaproteobacteria, Actinobacteriota</i> and <i>Firmicutes</i>, as well as a variety of OTUs with a small number of sequences characteristic of hydrothermal ecosystems. The contribution of representatives of <i>Methylomirabilota</i> and <i>Nitrospirota</i> 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.https://www.mdpi.com/1424-2818/14/10/868microbial communitiesdiversity of 16S rRNA sequencesFe-Mn nodulesdeep sedimentsLake Baikalchemical composition |
| spellingShingle | Tamara Zemskaya Natalia Konstantinova Olga Shubenkova Tatyana Pogodaeva Vyacheslav Ivanov Sergei Bukin Andrey Khabuev Oleg Khlystov Grigory Vilkin Anna Lomakina Microbial Communities of Ferromanganese Sedimentary Layers and Nodules of Lake Baikal (Bolshoy Ushkany Island) Diversity microbial communities diversity of 16S rRNA sequences Fe-Mn nodules deep sediments Lake Baikal chemical composition |
| title | Microbial Communities of Ferromanganese Sedimentary Layers and Nodules of Lake Baikal (Bolshoy Ushkany Island) |
| title_full | Microbial Communities of Ferromanganese Sedimentary Layers and Nodules of Lake Baikal (Bolshoy Ushkany Island) |
| title_fullStr | Microbial Communities of Ferromanganese Sedimentary Layers and Nodules of Lake Baikal (Bolshoy Ushkany Island) |
| title_full_unstemmed | Microbial Communities of Ferromanganese Sedimentary Layers and Nodules of Lake Baikal (Bolshoy Ushkany Island) |
| title_short | Microbial Communities of Ferromanganese Sedimentary Layers and Nodules of Lake Baikal (Bolshoy Ushkany Island) |
| title_sort | microbial communities of ferromanganese sedimentary layers and nodules of lake baikal bolshoy ushkany island |
| topic | microbial communities diversity of 16S rRNA sequences Fe-Mn nodules deep sediments Lake Baikal chemical composition |
| url | https://www.mdpi.com/1424-2818/14/10/868 |
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