Bibliographische Detailangaben
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Personen und Körperschaften:
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Trivedi, C B (VerfasserIn); Stamps, B W (VerfasserIn); Lau, G E (VerfasserIn); Grasby, S E (VerfasserIn); Templeton, A S (VerfasserIn); Spear, J R (VerfasserIn) |
| Format: |
Elektronische Zeitschrift
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| Sprache: |
English
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| veröffentlicht: |
American Society for Microbiology, 2020 |
| Gesamtaufnahme: |
GEM2: Geo-mapping for Energy and Minerals
, mSystems vol. 5, issue 4, e00504-20, 2020 p. 1-16, Natural Resources Canada, Contribution Series
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| Schlagwörter: |
Glaciers;
Borup Fiord Pass;
Genomics;
Nunavut;
Ellesmere Island;
Zeitschrift;
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| Quelle: |
GEOSCAN
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| Zusammenfassung: |
Biological sulfur cycling in polar, low-temperature ecosystems is an unders...
Biological sulfur cycling in polar, low-temperature ecosystems is an understudied phenomenon in part due to difficulty of access and the ephemeral nature of glacial environments. One such environment where sulfur cycling plays an important role in microbial metabolisms is located at Borup Fiord Pass (BFP) in the Canadian High Arctic. Here, transient springs emerge from the toe of a glacier creating a large proglacial aufeis (spring-derived ices) that are often covered in bright yellow/white sulfur, sulfate, and carbonate mineral precipitates that are accompanied by a strong odor of hydrogen sulfide. Metagenomic sequencing from multiple sites and sample types across the BFP glacial system produced 31 metagenome assembled genomes (MAGs) that were queried for sulfur-, nitrogen- and carbon- cycling/metabolism genes. An abundance of sulfur cycling genes was widespread across the isolated MAGs and site metagenomes taxonomically associated with the bacterial classes Alpha-, Epsilon- and Gamma-Proteobacteria. This corroborates with previous research from BFP implicating the Epsilon- Proteobacteria as the primary class responsible for sulfur oxidation; however, our new data suggests putative sulfur oxidation by organisms in Alpha- and Gamma- Proteobacterial classes which was not predicted. These findings indicate that in a low-temperature, ephemeral sulfur-based environment, functional redundancy may be a key mechanism that microorganisms use to co-exist whenever energy is limited and/or focused by redox chemistry.
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