N2O emission from a temperate forest soil during the freeze-thaw period: A mesocosm study

doi:10.1016/j.scitotenv.2018.08.155

	N2O emission from a temperate forest soil during the freeze-thaw period: A mesocosm study
	Peng, Bo 2,3; Sun, Jianfei 2; Liu, Jun 2; Dai, Weiwei 2; Sun, Lifei 2,3; Pei, Guangting 2,3; Gao, Decai 2,3; Wang, Chao 2; Jiang, Ping 2; Bai, Edith 1,2
刊名	SCIENCE OF THE TOTAL ENVIRONMENT
	2019-01-15
卷号	648 页码:350-357
关键词	N2O emission Freeze-thaw cycle Physical release Biological process Potential enzyme activities
ISSN号	0048-9697
DOI	10.1016/j.scitotenv.2018.08.155
英文摘要	Nitrous oxide (N2O) is an important greenhouse gas and is involved in the destruction of ozone layer. However, the underlying mechanisms of the high soil N2O emission during the freeze-thaw (FT) period are still unclear. Here, we conducted a mesocosm study with high frequency in situ measurements to explore the responses of soil microbes to the FT cydes and their influences on soil N2O emission. We found the high N2O emission rate during the FT period was mainly due to the release of substrates, the maintenance of high enzyme activities at the freezing stage, and the fast recovery of microbial biomass nitrogen (MBN) and high microbial activities at the thawing stage. Physical isolation of previously produced N2O was an important mechanism for the higher N2O flux at the thawing stage. With increasing numbers of the FT cydes, MBN at the thawing stage remained stable and potential dehydrogenase activities at the thawing stage also remained stable after the first eight FT cydes and only declined during the last two cycles, suggesting the sustainability of the biological mechanisms. Our study suggests that although MBN declined, microbial enzymes could maintain high activities at a few degrees Celsius below zero in this temperate forest soil and produce high N2O fluxes even at the freezing stage, which were trapped under the ice layer and released at the thawing stage, resulting in high soil N2O emission during the FT period. (C) 2018 Elsevier B.V. All rights reserved.
资助项目	Major State Basic Research Development Program of China (973 Program)[2014CB954400] ; Key Research Program of Frontier Sciences, CAS[QYZDB-SSWDQC006]
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000447805500033
内容类型	期刊论文
源URL	[http://210.72.129.5/handle/321005/123479]
专题	中国科学院沈阳应用生态研究所
通讯作者	Bai, Edith
作者单位	1.Northeast Normal Univ, Sch Geog Sci, Changchun 130024, Peoples R China 2.Chinese Acad Sci, Inst Appl Ecol, CAS Key Lab Forest Ecol & Management, Shenyang 110016, Liaoning, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Peng, Bo,Sun, Jianfei,Liu, Jun,et al. N2O emission from a temperate forest soil during the freeze-thaw period: A mesocosm study[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2019,648:350-357.
APA	Peng, Bo.,Sun, Jianfei.,Liu, Jun.,Dai, Weiwei.,Sun, Lifei.,...&Bai, Edith.(2019).N2O emission from a temperate forest soil during the freeze-thaw period: A mesocosm study.SCIENCE OF THE TOTAL ENVIRONMENT,648,350-357.
MLA	Peng, Bo,et al."N2O emission from a temperate forest soil during the freeze-thaw period: A mesocosm study".SCIENCE OF THE TOTAL ENVIRONMENT 648(2019):350-357.