Thresholds in aridity and soil carbon-to-nitrogen ratio govern the accumulation of soil microbial residues

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dc.contributor.authorHao, Zhiguo
dc.contributor.authorZhao, Yunfei
dc.contributor.authorWang, Xia
dc.contributor.authorWu, Jinhong
dc.contributor.authorJiang, Silong
dc.contributor.authorXiao, Jinjin
dc.contributor.authorWang, Kaichang
dc.contributor.authorZhou, Xiaohe
dc.contributor.authorLiu, Huiying
dc.contributor.authorLi, Jia
dc.contributor.authorSun, Yuxin
dc.date.accessioned2023-09-15T00:59:47Z
dc.date.available2023-09-15T00:59:47Z
dc.date.issued2021-11-18
dc.description© The Author(s) 2021. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. The Version of Scholarly Record of this Article is published in Communications Earth & Environment, 2021, available online at: https://www.nature.com/articles/s43247-021-00306-4 . Keywords: carbon cycle; climate-change ecology; ecosystem ecology.
dc.description.abstractMicrobial moribunds after microbial biomass turnover (microbial residues) contribute to the formation and stabilization of soil carbon pools; however, the factors influencing their accumulation on a global scale remain unclear. Here, we synthesized data for 268 amino sugar concentrations (biomarkers of microbial residues) in grassland and forest ecosystems for meta-analysis. We found that soil organic carbon, soil carbon-to-nitrogen ratio, and aridity index were key factors that predicted microbial residual carbon accumulation. Threshold aridity index and soil carbon-to-nitrogen ratios were identified (~0.768 and ~9.583, respectively), above which microbial residues decreased sharply. The aridity index threshold was associated with the humid climate range. We suggest that the soil carbon-to-nitrogen ratio threshold may coincide with a sharp decrease in fungal abundance. Although dominant factors vary between ecosystem and climate zone, with soil organic carbon and aridity index being important throughout, our findings suggest that climate and soil environment may govern microbial residue accumulation.
dc.description.sponsorshipAcknowledgements: Financial support for this research was provided by National Natural Science Foundation of China grant NSFC 41971051, The Second Tibetan Plateau Scientific Expedition and Research (2019QZKK0603), and The National Science and Technology Basic Resources Investigation Program of China grant 2017FY100900. We thank Yichen Li for her help in drawing the schematic diagram.
dc.identifier.citationHao, Z., Zhao, Y., Wang, X. et al. Thresholds in aridity and soil carbon-to-nitrogen ratio govern the accumulation of soil microbial residues. Commun Earth Environ 2, 236 (2021). https://doi.org/10.1038/s43247-021-00306-4
dc.identifier.otherhttps://doi.org/10.1038/s43247-021-00306-4
dc.identifier.urihttps://hdl.handle.net/20.500.14096/419
dc.language.isoen
dc.publisherSpringer Nature
dc.titleThresholds in aridity and soil carbon-to-nitrogen ratio govern the accumulation of soil microbial residues
dc.typeArticle

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