Soil Temperature Dynamics Modulate N2O Flux Response to Multiple Nitrogen Additions in an Alpine Steppe

doi:10.1029/2018JG004488

	Soil Temperature Dynamics Modulate N2O Flux Response to Multiple Nitrogen Additions in an Alpine Steppe
	Peng, Yunfeng ; Wang, Guanqin 1; Li, Fei 1; Zhou, Guoying 2,3; Yang, Guibiao 1; Fang, Kai 1; Liu, Li 1; Qin, Shuqi 1; Zhang, Dianye 1; Yang, Yuanhe1
	2018
发表期刊	JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
ISSN	2169-8953
卷号	123 期号:10 页码:3308-3319
摘要	Emissions of nitrous oxide (N2O) contribute to global warming and stratospheric ozone depletion. Anthropogenic N2O emissions predominately result from the addition of synthetic nitrogen (N) fertilizers to terrestrial ecosystems. Usually, an exponential increase in N2O emissions occurs as N addition rates increase to exceed plant demands. However, most evidence to date is from temperate areas, with little information available for alpine ecosystems. Here we examined the changes in N2O flux under eight N addition levels and the mechanisms regulating these changes in a Tibetan alpine steppe. Our results showed that N2O emission rate increased linearly with increasing N additions. Even when soil N availability exceeded plant N uptake, no sharp N2O emissions were observed. The likely explanation was that decreased soil temperature limited the growth of nitrification-related microorganisms, mainly ammonia-oxidizing archaea, which further attenuated the positive response of N2O emissions to excess N supply. These findings suggest that the N-induced changes in soil temperature regulate the growth of nitrifying microorganisms and the subsequent N2O fluxes in this alpine steppe, and the exponential N2O emission-N rate relationship observed in warm regions may not be simply extrapolated to alpine ecosystems.
关键词	Nitrous oxide nonlinear response greenhouse gases ammonia oxidizing archaea (AOA) ammonia oxidizing bacteria (AOB) denitrifiers
学科领域	Environmental Sciences ; Geosciences, Multidisciplinary
DOI	10.1029/2018JG004488
收录类别	SCI
语种	英语
WOS关键词	OXIDE EMISSIONS ; NONLINEAR RESPONSES ; CARBON FLUXES ; SPECIES LOSS ; FERTILIZER ; WATER ; NITRIFICATION ; COMMUNITY ; BACTERIA ; ARCHAEA
WOS记录号	WOS:000450721000015
出版者	AMER GEOPHYSICAL UNION
文献子类	Article
出版地	WASHINGTON
EISSN	2169-8961
资助机构	National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31770521, 31670482] ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences [QYZDB-SSWSMC049] ; Youth Innovation Promotion Association CAS ; Chinese Academy of Sciences-Peking University Pioneer Collaboration Team ; Strategic Priority Research Program of the Chinese Academy of SciencesChinese Academy of Sciences [XDA19070303]
作者邮箱	yhyang@ibcas.ac.cn
引用统计	被引频次：29[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/20563
专题	植被与环境变化国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing, Peoples R China 2.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing, Peoples R China 3.Chinese Acad Sci, Northwest Inst Plateau Biol, Xining, Qinghai, Peoples R China 4.Chinese Acad Sci, Key Lab Tibetan Med Res, Xining, Qinghai, Peoples R China
推荐引用方式 GB/T 7714	Peng, Yunfeng,Wang, Guanqin,Li, Fei,et al. Soil Temperature Dynamics Modulate N2O Flux Response to Multiple Nitrogen Additions in an Alpine Steppe[J]. JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,2018,123(10):3308-3319.
APA	Peng, Yunfeng.,Wang, Guanqin.,Li, Fei.,Zhou, Guoying.,Yang, Guibiao.,...&Yang, Yuanhe.(2018).Soil Temperature Dynamics Modulate N2O Flux Response to Multiple Nitrogen Additions in an Alpine Steppe.JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,123(10),3308-3319.
MLA	Peng, Yunfeng,et al."Soil Temperature Dynamics Modulate N2O Flux Response to Multiple Nitrogen Additions in an Alpine Steppe".JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES 123.10(2018):3308-3319.

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