Quantitative assessment of microbial necromass contribution to soil organic matter

Global Change Biology
Chao LiangMatthias Kästner

Abstract

Soil carbon transformation and sequestration have received significant interest in recent years due to a growing need for quantitating its role in mitigating climate change. Even though our understanding of the nature of soil organic matter has recently been substantially revised, fundamental uncertainty remains about the quantitative importance of microbial necromass as part of persistent organic matter. Addressing this uncertainty has been hampered by the absence of quantitative assessments whether microbial matter makes up the majority of the persistent carbon in soil. Direct quantitation of microbial necromass in soil is very challenging because of an overlapping molecular signature with nonmicrobial organic carbon. Here, we use a comprehensive analysis of existing biomarker amino sugar data published between 1996 and 2018, combined with novel appropriation using an ecological systems approach, elemental carbon-nitrogen stoichiometry, and biomarker scaling, to demonstrate a suit of strategies for quantitating the contribution of microbe-derived carbon to the topsoil organic carbon reservoir in global temperate agricultural, grassland, and forest ecosystems. We show that microbial necromass can make up more than half of soil...Continue Reading

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Citations

Nov 28, 2019·Global Change Biology·Marie SpohnSven Marhan
Jan 8, 2020·Global Change Biology·Ji ChenUffe Jørgensen
Aug 23, 2020·Environmental Microbiology·Ke-Qing XiaoYong-Guan Zhu
Aug 28, 2020·Global Change Biology·Xuefeng ZhuChao Liang
Nov 11, 2020·Ecology Letters·Tessa CamenzindMatthias C Rillig
Oct 22, 2020·Journal of Environmental Quality·Kimmo RasaRisto Uusitalo
Dec 29, 2020·The Science of the Total Environment·Zhiming GuoTimothy A Quine
Feb 3, 2021·Global Change Biology·Jing TianJennifer A J Dungait
Feb 7, 2021·Nature Communications·Julien Sainte-MarieDelphine Derrien
Jan 12, 2021·Ecological Applications : a Publication of the Ecological Society of America·S A BillingsW Wieder
Aug 20, 2020·The Science of the Total Environment·Liuming YangJinsheng Xie
Mar 6, 2021·Global Change Biology·Matthew E CraigAnthony P Walker
Mar 14, 2021·Global Change Biology·Xiangbi ChenYirong Su
Apr 15, 2021·Environmental Science & Technology·Xiaomeng WeiYakov Kuzyakov
May 7, 2021·BioEssays : News and Reviews in Molecular, Cellular and Developmental Biology·Bartosz Adamczyk
Jul 12, 2021·Trends in Ecology & Evolution·Wenli DingHans Lambers
Sep 9, 2021·Proceedings of the National Academy of Sciences of the United States of America·Matthias C RilligIndia Mansour
Oct 2, 2021·The ISME Journal·Kyle Mason-JonesWim H van der Putten
Nov 2, 2021·Frontiers in Microbiology·Sarah I LeichtyKirsten S Hofmockel
Nov 21, 2021·Proceedings of the National Academy of Sciences of the United States of America·Samuel E BarnettDaniel H Buckley
Nov 23, 2021·The Science of the Total Environment·Suhui MaJingyun Fang

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