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Viral regulators of responses to soil warming - Nature Reviews Microbiology
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The amount of carbon stored in tundra soils accounts for ~50% of the global soil organic carbon reservoir. The rising temperature causes permafrost to thaw, which stimulates microbial-mediated degradation of soil organic carbon and the release of greenhouse gases, further exacerbating climate warming. Previous studies have focussed on the responses of bacterial communities and lower eukaryotes to warming in permafrost regions, but the roles of viral communities are less well understood. Ji et al. set out to increase our understanding of how viruses might mediate responses of microbial communities to climate warming. The authors performed a de novo assembly of data obtained from shotgun metagenomic sequencing of a northern-latitude permafrost region, where Alaskan tundra soils were subjected to experimental warming for ~5?years. The authors reported that multiple environmental factors affect viral community and functional gene structures, with soil depth, rather than warming treatment, being an important factor. Warming induced changes in some viral functional classes (specifically, auxiliary metabolic genes) and in the virus to microorganism ratios for specific lineages. Finally, the authors found that the viral life cycle strategies and viral infection patterns were significantly different at the two depths, which might contribute to different microbial feedbacks to warming.
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Ji, M. et al. Tundra soil viruses mediate responses of microbial communities to climate warming. mBio https://doi.org/10.1128/mbio.03009-22 (2023)
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Nature Reviews Microbiology http://www.nature.com/nrmicro/
Andrea Du Toit
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Du Toit, A. Viral regulators of responses to soil warming. Nat Rev Microbiol (2023). https://doi.org/10.1038/s41579-023-00874-6
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Published : 21 February 2023
DOI : https://doi.org/10.1038/s41579-023-00874-6
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