干旱区生态环境知识资源中心(Arid): Microbial potential for denitrification in the hyperarid Atacama Desert soils

Arid

DOI	10.1016/j.soilbio.2021.108248
	Microbial potential for denitrification in the hyperarid Atacama Desert soils
	Wu, Di; Senbayram, Mehmet; Moradi, Ghazal; Moerchen, Ramona; Knief, Claudia; Klumpp, Erwin; Jones, Davey L.; Well, Reinhard; Chen, Ruirui; Bol, Roland
通讯作者	Chen, RR (corresponding author), Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing 210008, Peoples R China.
来源期刊	SOIL BIOLOGY & BIOCHEMISTRY
ISSN	0038-0717
EISSN	1879-3428
出版年	2021
卷号	157
英文摘要	The hyperarid soils of the Atacama Desert, Chile, contain the largest known nitrate deposits in the world. They also represent one of the most hostile environments for microbial life anywhere in the terrestrial biosphere. Despite known for its extreme dryness, several heavy rainfall events causing localised flash flooding have struck Atacama Desert core regions during the last five years. It remains unclear, however, whether these soils can support microbial denitrification. To answer this, we sampled soils along a hyperaridity gradient in the Atacama Desert and conducted incubation experiments using a robotized continuous flow system under a He/O-2 atmosphere. The impacts of four successive extreme weather events on soil-borne N2O and N-2 emissions were investigated, i) water addition, ii) NO3- addition, iii) labile carbon (C) addition, and iv) oxygen depletion. The N-15-N2O site-preference (SP) approach was further used to examine the source of N2O produced. Extremely low N2O fluxes were detected shortly after water and NO3- addition, whereas pronounced N2O and N-2 emissions were recorded after labile-C (glucose) amendment in all soils. Under anoxia, N-2 emissions increased drastically while N2O emissions decreased concomitantly, indicating the potential for complete denitrification at all sites. Although increasing aridity significantly reduced soil bacterial richness, microbial potential for denitrification and associated gene abundance (i.e., napA, narG, nirS, nirK, cnorB, qnorB and nosZ) was not affected. The (N2ON)-N-15 site preference values based on two end-member model suggested that fungal and bacterial denitrification co-contributed to N2O production in less arid sites, whereas bacterial denitrification dominated with increasing aridity. We conclude that soil denitrification functionality is preserved even with lowered microbial richness in the extreme hyperarid Atacama Desert. Future changes in land-use or extreme climate events therefore have a potential to destabilize the immense reserves of nitrate and induce significant N2O losses in the region.
英文关键词	Denitification Greenhouse gases Nitrogen cycling Moisture status Xerophile
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000643701100016
WOS关键词	NITROUS-OXIDE ; FUNGAL DENITRIFICATION ; PRODUCT STOICHIOMETRY ; NITRATE DEPOSITS ; N2O EMISSIONS ; BIODIVERSITY ; MINERALIZATION ; MICROORGANISMS ; COMMUNITIES ; LIFE
WOS类目	Soil Science
WOS研究方向	Agriculture
来源机构	中国农业大学 ; University of Western Australia
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/351781
作者单位	[Wu, Di] China Agr Univ, Coll Resources & Environm Sci, Beijing Key Lab Biodivers & Organ Farming, Beijing 100083, Peoples R China; [Senbayram, Mehmet; Well, Reinhard] Thunen Inst Climate Smart Agr, Bundesallee 65, D-38116 Braunschweig, Germany; [Senbayram, Mehmet] Univ Harran, Inst Plant Nutr & Soil Sci, TR-63000 San Liurfa, Turkey; [Moradi, Ghazal; Klumpp, Erwin; Bol, Roland] Forschungszentrum Julich, Inst Bio & Geosci Agrosphere IBG, D-52425 Julich, Germany; [Moerchen, Ramona] Univ Bonn, Inst Crop Sci & Resource Conservat INRES, Soil Sci & Soil Ecol, D-53115 Bonn, Germany; [Knief, Claudia] Univ Bonn, Inst Crop Sci & Resource Conservat Mol Biol Rhizo, D-53115 Bonn, Germany; [Jones, Davey L.] Bangor Univ, Environm Ctr Wales, Bangor LL57 2UW, Gwynedd, Wales; [Jones, Davey L.] Univ Western Australia, UWA Sch Agr & Environm, Perth, WA 6009, Australia; [Chen, Ruirui] Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing 210008, Peoples R China
推荐引用方式 GB/T 7714	Wu, Di,Senbayram, Mehmet,Moradi, Ghazal,et al. Microbial potential for denitrification in the hyperarid Atacama Desert soils[J]. 中国农业大学, University of Western Australia,2021,157.
APA	Wu, Di.,Senbayram, Mehmet.,Moradi, Ghazal.,Moerchen, Ramona.,Knief, Claudia.,...&Bol, Roland.(2021).Microbial potential for denitrification in the hyperarid Atacama Desert soils.SOIL BIOLOGY & BIOCHEMISTRY,157.
MLA	Wu, Di,et al."Microbial potential for denitrification in the hyperarid Atacama Desert soils".SOIL BIOLOGY & BIOCHEMISTRY 157(2021).