Microbial metabolic response to winter warming stabilizes soil carbon

doi:10.1111/gcb.15538

	Microbial metabolic response to winter warming stabilizes soil carbon
	Tian, Jing 1,2; Zong, Ning 1; Hartley, Iain P.3; He, Nianpeng 1; Zhang, Jinjing 4; Powlson, David 5; Zhou, Jizhong 6,7,8; Kuzyakov, Yakov 9,10,11; Zhang, Fusuo 2; Yu, Guirui 1
刊名	GLOBAL CHANGE BIOLOGY
	2021-02-13
页码	18
关键词	carbon degradation genes microbial anabolism microbial community SOC stabilization soil aggregate turnover winter warming
ISSN号	1354-1013
DOI	10.1111/gcb.15538
通讯作者	Tian, Jing(tianj@igsnrr.ac.cn) ; Yu, Guirui(yugr@igsnrr.ac.cn)
英文摘要	Current consensus on global climate change predicts warming trends with more pronounced temperature changes in winter than summer in the Northern Hemisphere at high latitudes. Moderate increases in soil temperature are generally related to faster rates of soil organic carbon (SOC) decomposition in Northern ecosystems, but there is evidence that SOC stocks have remained remarkably stable or even increased on the Tibetan Plateau under these conditions. This intriguing observation points to altered soil microbial mediation of carbon-cycling feedbacks in this region that might be related to seasonal warming. This study investigated the unexplained SOC stabilization observed on the Tibetan Plateau by quantifying microbial responses to experimental seasonal warming in a typical alpine meadow. Ecosystem respiration was reduced by 17%-38% under winter warming compared with year-round warming or no warming and coincided with decreased abundances of fungi and functional genes that control labile and stable organic carbon decomposition. Compared with year-round warming, winter warming slowed macroaggregate turnover rates by 1.6 times, increased fine intra-aggregate particulate organic matter content by 75%, and increased carbon stabilized in microaggregates within stable macroaggregates by 56%. Larger bacterial "necromass" (amino sugars) concentrations in soil under winter warming coincided with a 12% increase in carboxyl-C. These results indicate the enhanced physical preservation of SOC under winter warming and emphasize the role of soil microorganisms in aggregate life cycles. In summary, the divergent responses of SOC persistence in soils exposed to winter warming compared to year-round warming are explained by the slowing of microbial decomposition but increasing physical protection of microbially derived organic compounds. Consequently, the soil microbial response to winter warming on the Tibetan Plateau may cause negative feedbacks to global climate change and should be considered in Earth system models.
资助项目	National Natural Science Foundation of China[31770560] ; National Natural Science Foundation of China[32071629] ; National Natural Science Foundation of China[41703079] ; National Key R&D Program of China[2017YFA0604803]
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
语种	英语
出版者	WILEY
WOS记录号	WOS:000617648500001
资助机构	National Natural Science Foundation of China ; National Key R&D Program of China
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/136074]
专题	中国科学院地理科学与资源研究所
通讯作者	Tian, Jing; Yu, Guirui
作者单位	1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing, Peoples R China 2.China Agr Univ, Natl Acad Agr Green Dev, Coll Resources & Environm Sci, Key Lab Plant Soil Interact,Minist Educ, Beijing, Peoples R China 3.Univ Exeter, Coll Life & Environm Sci, Geog, Exeter, Devon, England 4.Jilin Agr Univ, Coll Resource & Environm Sci, Key Lab Soil Resource Sustainable Utilizat Commod, Changchun, Peoples R China 5.Rothamsted Res, Dept Sustainable Agr Sci, Harpenden, Herts, England 6.Univ Oklahoma, Dept Microbiol & Plant Biol, Inst Environm Genom, Norman, OK USA 7.Univ Oklahoma, Sch Civil Engn & Environm Sci, Norman, OK USA 8.Lawrence Berkeley Natl Lab, Earth & Environm Sci, Berkeley, CA USA 9.Univ Gottingen, Dept Soil Sci Temperate Ecosyst, Gottingen, Germany 10.RUDN Univ, Agrotechnol Inst, Moscow, Russia
推荐引用方式 GB/T 7714	Tian, Jing,Zong, Ning,Hartley, Iain P.,et al. Microbial metabolic response to winter warming stabilizes soil carbon[J]. GLOBAL CHANGE BIOLOGY,2021:18.
APA	Tian, Jing.,Zong, Ning.,Hartley, Iain P..,He, Nianpeng.,Zhang, Jinjing.,...&Dungait, Jennifer A. J..(2021).Microbial metabolic response to winter warming stabilizes soil carbon.GLOBAL CHANGE BIOLOGY,18.
MLA	Tian, Jing,et al."Microbial metabolic response to winter warming stabilizes soil carbon".GLOBAL CHANGE BIOLOGY (2021):18.