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Metagenomic insights into microbial community structure and metabolism in alpine permafrost on the Tibetan Plateau

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  • Luyao Kang

    (Chinese Academy of Sciences
    China National Botanical Garden
    University of Chinese Academy of Sciences)

  • Yutong Song

    (Chinese Academy of Sciences
    China National Botanical Garden
    University of Chinese Academy of Sciences)

  • Rachel Mackelprang

    (California State University Northridge)

  • Dianye Zhang

    (Chinese Academy of Sciences
    China National Botanical Garden)

  • Shuqi Qin

    (Chinese Academy of Sciences
    China National Botanical Garden)

  • Leiyi Chen

    (Chinese Academy of Sciences
    China National Botanical Garden)

  • Linwei Wu

    (Peking University)

  • Yunfeng Peng

    (Chinese Academy of Sciences
    China National Botanical Garden)

  • Yuanhe Yang

    (Chinese Academy of Sciences
    China National Botanical Garden
    University of Chinese Academy of Sciences)

Abstract

Permafrost, characterized by its frozen soil, serves as a unique habitat for diverse microorganisms. Understanding these microbial communities is crucial for predicting the response of permafrost ecosystems to climate change. However, large-scale evidence regarding stratigraphic variations in microbial profiles remains limited. Here, we analyze microbial community structure and functional potential based on 16S rRNA gene amplicon sequencing and metagenomic data obtained from an ∼1000 km permafrost transect on the Tibetan Plateau. We find that microbial alpha diversity declines but beta diversity increases down the soil profile. Microbial assemblages are primarily governed by dispersal limitation and drift, with the importance of drift decreasing but that of dispersal limitation increasing with soil depth. Moreover, genes related to reduction reactions (e.g., ferric iron reduction, dissimilatory nitrate reduction, and denitrification) are enriched in the subsurface and permafrost layers. In addition, microbial groups involved in alternative electron accepting processes are more diverse and contribute highly to community-level metabolic profiles in the subsurface and permafrost layers, likely reflecting the lower redox potential and more complicated trophic strategies for microorganisms in deeper soils. Overall, these findings provide comprehensive insights into large-scale stratigraphic profiles of microbial community structure and functional potentials in permafrost regions.

Suggested Citation

  • Luyao Kang & Yutong Song & Rachel Mackelprang & Dianye Zhang & Shuqi Qin & Leiyi Chen & Linwei Wu & Yunfeng Peng & Yuanhe Yang, 2024. "Metagenomic insights into microbial community structure and metabolism in alpine permafrost on the Tibetan Plateau," Nature Communications, Nature, vol. 15(1), pages 1-15, December.
  • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-50276-2
    DOI: 10.1038/s41467-024-50276-2
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    References listed on IDEAS

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    Cited by:

    1. Shuqi Qin & Dianye Zhang & Bin Wei & Yuanhe Yang, 2024. "Dual roles of microbes in mediating soil carbon dynamics in response to warming," Nature Communications, Nature, vol. 15(1), pages 1-11, December.

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