干旱区生态环境知识资源中心(Arid): Large nitrogen oxide emission pulses from desert soils and associated microbiomes

Arid

DOI	10.1007/s10533-020-00672-9
	Large nitrogen oxide emission pulses from desert soils and associated microbiomes
	Eberwein, Jennifer R.1; Homyak, Peter M.2; Carey, Chelsea J.3; Aronson, Emma L.4; Jenerette, G. Darrel 1
通讯作者	Jenerette, G. Darrel
来源期刊	BIOGEOCHEMISTRY
ISSN	0168-2563
EISSN	1573-515X
出版年	2020
卷号	149 期号:3 页码:239-250
英文摘要	Nitrogen (N) trace gas emission pulses produced after wetting dry soils may be important pathways of ecosystem N loss. However, the rates and mechanisms controlling these emissions remain unclear. We tested whether changes in microbial community structure and increased rates of atmospheric N deposition could explain N emissions at two desert sites differing in atmospheric N deposition by similar to six fold. We measured peak NOx (sum of nitric oxide and nitrogen dioxide) emissions 12 h post-wetting. NOx emissions remained elevated over 24 h and increased after adding N. In contrast, we measured the highest nitrous oxide (N2O) emissions within only 15 min post-wetting. N2O emissions decreased within 12 h, were insensitive to adding N, and were among the highest reported globally. Microbial communities at the high N deposition site were less diverse with higher 16S nitrifier and bacterial amoA gene abundances relative to the low N deposition site, suggesting an increased capacity for nitrification. Nevertheless, N emissions were lower at the high N deposition site. While microbial communities changed after wetting, these changes were not correlated with N emissions. We conclude that desert soils can produce substantial NOx and N2O emission pulses, but that these emissions do not appear directly governed by changing microbial community characteristics or higher atmospheric N inputs. These findings highlight the importance of gaseous N loss pathways from dryland ecosystems that may contribute to sustained N limitation, with implications for atmospheric chemistry and Earth's climate.
英文关键词	Nitrous oxide Nitric oxide NOx N2O Drying-rewetting Nitrogen deposition
类型	Article
语种	英语
国家	USA
开放获取类型	Green Published
收录类别	SCI-E
WOS记录号	WOS:000534878000001
WOS关键词	AMMONIA-OXIDIZING BACTERIA ; GREENHOUSE-GAS FLUXES ; NITRIC-OXIDE ; N2O EMISSION ; DIVERSITY ; DEPOSITION ; MICROORGANISMS ; NITRIFICATION ; CALIFORNIA ; NO
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary
WOS研究方向	Environmental Sciences & Ecology ; Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/319164
作者单位	1.Univ Calif Riverside, Bot & Plant Sci, Riverside, CA 92521 USA; 2.Univ Calif Riverside, Environm Sci, Riverside, CA 92521 USA; 3.Point Blue Conservat Sci, Petaluma, CA USA; 4.Univ Calif Riverside, Microbiol & Plant Pathol, Riverside, CA 92521 USA
推荐引用方式 GB/T 7714	Eberwein, Jennifer R.,Homyak, Peter M.,Carey, Chelsea J.,et al. Large nitrogen oxide emission pulses from desert soils and associated microbiomes[J],2020,149(3):239-250.
APA	Eberwein, Jennifer R.,Homyak, Peter M.,Carey, Chelsea J.,Aronson, Emma L.,&Jenerette, G. Darrel.(2020).Large nitrogen oxide emission pulses from desert soils and associated microbiomes.BIOGEOCHEMISTRY,149(3),239-250.
MLA	Eberwein, Jennifer R.,et al."Large nitrogen oxide emission pulses from desert soils and associated microbiomes".BIOGEOCHEMISTRY 149.3(2020):239-250.