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Metabolic capabilities mute positive response to direct and indirect impacts of warming throughout the soil profile

Author

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  • Nicholas C. Dove

    (University of California
    Biosciences Division, Oak Ridge National Laboratory)

  • Margaret S. Torn

    (Earth and Environmental Sciences Area, Lawrence Berkeley National Laboratory)

  • Stephen C. Hart

    (University of California)

  • Neslihan Taş

    (Earth and Environmental Sciences Area, Lawrence Berkeley National Laboratory
    Biosciences Area, Lawrence Berkeley National Laboratory)

Abstract

Increasing global temperatures are predicted to stimulate soil microbial respiration. The direct and indirect impacts of warming on soil microbes, nevertheless, remain unclear. This is particularly true for understudied subsoil microbes. Here, we show that 4.5 years of whole-profile soil warming in a temperate mixed forest results in altered microbial community composition and metabolism in surface soils, partly due to carbon limitation. However, microbial communities in the subsoil responded differently to warming than in the surface. Throughout the soil profile—but to a greater extent in the subsoil—physiologic and genomic measurements show that phylogenetically different microbes could utilize complex organic compounds, dampening the effect of altered resource availability induced by warming. We find subsoil microbes had 20% lower carbon use efficiencies and 47% lower growth rates compared to surface soils, which constrain microbial communities. Collectively, our results show that unlike in surface soils, elevated microbial respiration in subsoils may continue without microbial community change in the near-term.

Suggested Citation

  • Nicholas C. Dove & Margaret S. Torn & Stephen C. Hart & Neslihan Taş, 2021. "Metabolic capabilities mute positive response to direct and indirect impacts of warming throughout the soil profile," Nature Communications, Nature, vol. 12(1), pages 1-13, December.
    • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-22408-5
    DOI: 10.1038/s41467-021-22408-5
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    Cited by:

    1. Pang, Haifang & Lian, Yanhao & Zhao, Zhibo & Guo, Hui & Li, Zongzhen & Hu, Junjie & Ren, Yongzhe & Lin, Tongbao & Wang, Zhiqiang, 2024. "Compensatory effect of supplementary irrigation on winter wheat under warming conditions," Agricultural Water Management, Elsevier, vol. 295(C).

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