首页|Microbial carbon use efficiency promotes global soil carbon storage

Microbial carbon use efficiency promotes global soil carbon storage

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Soils store more carbon than other terrestrial ecosystems. How soil organic carbon (SOC) forms and persists remains uncertain, which makes it challenging to understand how it will respond to climatic change. It has been suggested that soil microorganisms play an important role in SOC formation, preservation and loss. Although microorganisms affect the accumulation and loss of soil organic matter through many pathways, microbial carbon use efficiency (CUE) is an integrative metric that can capture the balance of these processes. Although CUE has the potential to act as a predictor of variation in SOC storage, the role of CUE in SOC persistence remains unresolved. Here we examine the relationship between CUE and the preservation of SOC, and interactions with climate, vegetation and edaphic properties, using a combination of global-scale datasets, a microbial-process explicit model, data assimilation, deep learning and meta-analysis. We find that CUE is at least four times as important as other evaluated factors, such as carbon input, decomposition or vertical transport, in determining SOC storage and its spatial variation across the globe. In addition, CUE shows a positive correlation with SOC content. Our findings point to microbial CUE as a major determinant of global SOC storage. Understanding the microbial processes underlying CUE and their environmental dependence may help the prediction of SOC feedback to a changing climate.

Feng Tao、Yuanyuan Huang、Bruce A. Hungate、Stefano Manzoni、Serita D. Frey、Michael W. I. Schmidt、Markus Reichstein、Nuno Carvalhais、Philippe Ciais、Lifen Jiang、Johannes Lehmann、Ying-Ping Wang、Benjamin Z. Houlton、Bernhard Ahrens、Umakant Mishra、Gustaf Hugelius、Toby O. Hocking、Xingjie Lu、Zheng Shi、Kostiantyn Viatkin、Ronald Vargas、Yusuf Yigini、Christian Omuto、Ashish A. Malik、Guillermo Peralta、Rosa Cuevas-Corona、Luciano E. Di Paolo、Isabel Luotto、Cuijuan Liao、Yi-Shuang Liang、Vinisa S. Saynes、Xiaomeng Huang、Yiqi Luo

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Department of Earth System Science, Ministry of Education Key Laboratory for Earth System Modelling, Institute for Global Change Studies, Tsinghua University, Beijing, China,Max Planck Institute for Biogeochemistry, Jena, Germany,Food and Agricultural Organization of the United Nations, Rome, Italy

Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, China

Center for Ecosystem Science and Society, Department of Biological Sciences, Northern Arizona University, Flagstaff, AZ, USA,School of Informatics, Computing and Cyber Systems, Northern Arizona University, Flagstaff, AZ, USA

Department of Physical Geography and Bolin Centre for Climate Research, Stockholm University, Stockholm, Sweden

Center for Soil Biogeochemistry and Microbial Ecology, Department of Natural Resources and the Environment, University of New Hampshire, Durham, NH, USA

Department of Geography, University of Zurich, Zurich, Switzerland

Max Planck Institute for Biogeochemistry, Jena, Germany

Max Planck Institute for Biogeochemistry, Jena, Germany,Departamento de Ciencias e Engenharia do Ambiente, DCEA, Faculdade de Ciencias e Tecnologia, FCT, Universidade Nova de Lisboa, Caparica, Portugal

Laboratoire des Sciences du Climat et de I'Environnement, LSCE/IPSL, CEA-CNRS-UVSQ, Universite Paris- Saclay, Gif-sur-Yvette, France

School of Integrative Plant Science, Cornell University, Ithaca, NY, USA

Soil and Crop Sciences Section, School of Integrative Plant Science, Cornell University, Ithaca, NY, USA

CSIRO Environment, Aspendale, Victoria, Australia

Department of Ecology and Evolutionary Biology and Department of Global Development, Cornell University, Ithaca, NY, USA

Computational Biology and Biophysics, Sandia National Laboratories, Livermore, CA, USA,Joint BioEnergy Institute, Lawrence Berkeley National Laboratory, Emeryville, CA, USA

School of Informatics, Computing and Cyber Systems, Northern Arizona University, Flagstaff, AZ, USA

School of Atmospheric Sciences, Sun Yat-sen University, Guangzhou, China

lnstitute for Environmental Genomics and Department of Microbiology and Plant Biology, University of Oklahoma, Norman, OK, USA

Food and Agricultural Organization of the United Nations, Rome, Italy,Soil and Crop Sciences Section, School of Integrative Plant Science, Cornell University, Ithaca, NY, USA

Food and Agricultural Organization of the United Nations, Rome, Italy

School of Biological Sciences, University of Aberdeen, Aberdeen, UK

Department of Earth System Science, Ministry of Education Key Laboratory for Earth System Modelling, Institute for Global Change Studies, Tsinghua University, Beijing, China

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2023

10.1038/s41586-023-06042-3

Nature

Nature

ISSN：0028-0836
年,卷(期)：2023.618(7967)
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