干旱区生态环境知识资源中心(Arid): Desert soil sequesters atmospheric CO2 by microbial mineral formation

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DOI	10.1016/j.geoderma.2019.114104
	Desert soil sequesters atmospheric CO2 by microbial mineral formation
	Liu, Zhen 1; Sun, Yanfei 1; Zhang, Yuqing 1,2; Qin, Shugao 1,3; Sun, Yongqi 1; Mao, Henan 1; Miao, Lin 1
通讯作者	Zhang, Yuqing
来源期刊	GEODERMA
ISSN	0016-7061
EISSN	1872-6259
出版年	2020
卷号	361
英文摘要	Microbial carbonate formation in soil may play a critical role in sequestering atmospheric CO2, specifically in drylands with sparse vegetation and harsh environments. However, few studies have examined the mechanism of CO2 fixation by soil microbes. Here, we investigated the sign of soil inorganic carbon (SIC) formed by microbial populations recovered from soil in the Mu Us Desert and identified the carbon source of this process by tracking the isotope profile of atmospheric CO2 in the SIC pool. In addition, we used high-throughput sequencing to predict the function of soil microbial genes involved in metabolic pathways associated with the formation of carbonaceous minerals, and characterised these minerals using scanning electron microscopy, energy-dispersive X-ray, and X-ray diffraction spectrometry. We found that atmospheric CO2 was incorporated into SIC via microbial processes at a rate of approximately 52.13 mu g C kg(-1) d(-)1 during a 2.5-month labelling period under (CO2)-C-13, and that microbial genes predicted to function in metabolic pathways for carbonaceous mineral formation were widespread among desert soil microbes. Moreover, the composition of microbial populations, along with the predicted metabolic pathways for microbial mineral formation, correlated significantly with rate of microbial CO2 incorporation into SIC. Importantly, we observed the formation of carbonaceous minerals such as calcite in desert soil samples inoculated with indigenous microbes. To our knowledge, we demonstrated for the first time that desert soil microbes are directly involved in fixing atmospheric CO2 via biomineralisation. Our findings provide empirical evidence for soil microbe-driven sequestration of atmospheric carbon and further reveal the potential capacity of desert soil for carbon sequestration.
英文关键词	Atmospheric CO2 Carbon sequestration Carbonaceous mineral formation Desert Inorganic carbon
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000510804700004
WOS关键词	INORGANIC CARBON ; PEDOGENIC CARBONATE ; ORGANIC-MATTER ; MOJAVE DESERT ; NEW-MEXICO ; PRECIPITATION ; SEQUESTRATION ; DIOXIDE ; BACTERIA ; CALCITE
WOS类目	Soil Science
WOS研究方向	Agriculture
来源机构	北京林业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/314580
作者单位	1.Beijing Forestry Univ, Sch Soil & Water Conservat, Yanchi Res Stn, Beijing 100083, Peoples R China; 2.Beijing Forestry Univ, Key Lab State Forestry Adm Soil & Water Conservat, Beijing 100083, Peoples R China; 3.Beijing Forestry Univ, Minist Educ, Engn Res Ctr Forestry Ecol Engn, Beijing 100083, Peoples R China
推荐引用方式 GB/T 7714	Liu, Zhen,Sun, Yanfei,Zhang, Yuqing,et al. Desert soil sequesters atmospheric CO2 by microbial mineral formation[J]. 北京林业大学,2020,361.
APA	Liu, Zhen.,Sun, Yanfei.,Zhang, Yuqing.,Qin, Shugao.,Sun, Yongqi.,...&Miao, Lin.(2020).Desert soil sequesters atmospheric CO2 by microbial mineral formation.GEODERMA,361.
MLA	Liu, Zhen,et al."Desert soil sequesters atmospheric CO2 by microbial mineral formation".GEODERMA 361(2020).