Unveiling unique microbial nitrogen cycling and nitrification driver in coastal Antarctica.
Largely removed from anthropogenic delivery of nitrogen (N), Antarctica has notably low levels of nitrogen. Though our understanding of biological sources of ammonia have been elucidated, the microbial drivers of nitrate (NO3-) cycling in coastal Antarctica remains poorly understood. Here, we explor...
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ftpubmed:38609359 2024-05-12T07:56:33+00:00 Unveiling unique microbial nitrogen cycling and nitrification driver in coastal Antarctica. Han, Ping Tang, Xiufeng Koch, Hanna Dong, Xiyang Hou, Lijun Wang, Danhe Zhao, Qian Li, Zhe Liu, Min Lücker, Sebastian Shi, Guitao 2024 Apr 12 https://doi.org/10.1038/s41467-024-47392-4 https://pubmed.ncbi.nlm.nih.gov/38609359 eng eng Nature Publishing Group https://doi.org/10.1038/s41467-024-47392-4 https://pubmed.ncbi.nlm.nih.gov/38609359 © 2024. The Author(s). Nat Commun ISSN:2041-1723 Volume:15 Issue:1 Journal Article 2024 ftpubmed https://doi.org/10.1038/s41467-024-47392-4 2024-04-13T16:02:00Z Largely removed from anthropogenic delivery of nitrogen (N), Antarctica has notably low levels of nitrogen. Though our understanding of biological sources of ammonia have been elucidated, the microbial drivers of nitrate (NO3-) cycling in coastal Antarctica remains poorly understood. Here, we explore microbial N cycling in coastal Antarctica, unraveling the biological origin of NO3- via oxygen isotopes in soil and lake sediment, and through the reconstruction of 1968 metagenome-assembled genomes from 29 microbial phyla. Our analysis reveals the metabolic potential for microbial N2 fixation, nitrification, and denitrification, but not for anaerobic ammonium oxidation, signifying a unique microbial N-cycling dynamic. We identify the predominance of complete ammonia oxidizing (comammox) Nitrospira, capable of performing the entire nitrification process. Their adaptive strategies to the Antarctic environment likely include synthesis of trehalose for cold stress, high substrate affinity for resource utilization, and alternate metabolic pathways for nutrient-scarce conditions. We confirm the significant role of comammox Nitrospira in the autotrophic, nitrification process via 13C-DNA-based stable isotope probing. This research highlights the crucial contribution of nitrification to the N budget in coastal Antarctica, identifying comammox Nitrospira clade B as a nitrification driver. Article in Journal/Newspaper Antarc* Antarctic Antarctica PubMed Central (PMC) Antarctic The Antarctic Nature Communications 15 1 |
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Largely removed from anthropogenic delivery of nitrogen (N), Antarctica has notably low levels of nitrogen. Though our understanding of biological sources of ammonia have been elucidated, the microbial drivers of nitrate (NO3-) cycling in coastal Antarctica remains poorly understood. Here, we explore microbial N cycling in coastal Antarctica, unraveling the biological origin of NO3- via oxygen isotopes in soil and lake sediment, and through the reconstruction of 1968 metagenome-assembled genomes from 29 microbial phyla. Our analysis reveals the metabolic potential for microbial N2 fixation, nitrification, and denitrification, but not for anaerobic ammonium oxidation, signifying a unique microbial N-cycling dynamic. We identify the predominance of complete ammonia oxidizing (comammox) Nitrospira, capable of performing the entire nitrification process. Their adaptive strategies to the Antarctic environment likely include synthesis of trehalose for cold stress, high substrate affinity for resource utilization, and alternate metabolic pathways for nutrient-scarce conditions. We confirm the significant role of comammox Nitrospira in the autotrophic, nitrification process via 13C-DNA-based stable isotope probing. This research highlights the crucial contribution of nitrification to the N budget in coastal Antarctica, identifying comammox Nitrospira clade B as a nitrification driver. |
format |
Article in Journal/Newspaper |
author |
Han, Ping Tang, Xiufeng Koch, Hanna Dong, Xiyang Hou, Lijun Wang, Danhe Zhao, Qian Li, Zhe Liu, Min Lücker, Sebastian Shi, Guitao |
spellingShingle |
Han, Ping Tang, Xiufeng Koch, Hanna Dong, Xiyang Hou, Lijun Wang, Danhe Zhao, Qian Li, Zhe Liu, Min Lücker, Sebastian Shi, Guitao Unveiling unique microbial nitrogen cycling and nitrification driver in coastal Antarctica. |
author_facet |
Han, Ping Tang, Xiufeng Koch, Hanna Dong, Xiyang Hou, Lijun Wang, Danhe Zhao, Qian Li, Zhe Liu, Min Lücker, Sebastian Shi, Guitao |
author_sort |
Han, Ping |
title |
Unveiling unique microbial nitrogen cycling and nitrification driver in coastal Antarctica. |
title_short |
Unveiling unique microbial nitrogen cycling and nitrification driver in coastal Antarctica. |
title_full |
Unveiling unique microbial nitrogen cycling and nitrification driver in coastal Antarctica. |
title_fullStr |
Unveiling unique microbial nitrogen cycling and nitrification driver in coastal Antarctica. |
title_full_unstemmed |
Unveiling unique microbial nitrogen cycling and nitrification driver in coastal Antarctica. |
title_sort |
unveiling unique microbial nitrogen cycling and nitrification driver in coastal antarctica. |
publisher |
Nature Publishing Group |
publishDate |
2024 |
url |
https://doi.org/10.1038/s41467-024-47392-4 https://pubmed.ncbi.nlm.nih.gov/38609359 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_source |
Nat Commun ISSN:2041-1723 Volume:15 Issue:1 |
op_relation |
https://doi.org/10.1038/s41467-024-47392-4 https://pubmed.ncbi.nlm.nih.gov/38609359 |
op_rights |
© 2024. The Author(s). |
op_doi |
https://doi.org/10.1038/s41467-024-47392-4 |
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Nature Communications |
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15 |
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1 |
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1798836675205398528 |