Effects of warming and clipping on CH4 and N2O fluxes in an alpine meadow

doi:10.1016/j.agrformet.2020.108278

	Effects of warming and clipping on CH4 and N2O fluxes in an alpine meadow
	Wang, Jinsong 2,3; Luo, Yiqi 2; Quan, Quan 3,4; Ma, Fangfang 3,4; Tian, Dashuan 3; Chen, Weinan 3,4; Wang, Song 3,4; Yang, Lu 1; Meng, Cheng 3; Niu, Shuli 3,4
刊名	AGRICULTURAL AND FOREST METEOROLOGY
	2021-02-15
卷号	297 页码:10
关键词	Experimental warming Human activity CH4 uptake N2O emission Growing and nongrowing seasons
ISSN号	0168-1923
DOI	10.1016/j.agrformet.2020.108278
通讯作者	Wang, Jinsong(wangjinsong@igsnrr.ac.cn) ; Niu, Shuli(sniu@igsnrr.ac.cn)
英文摘要	Methane (CH4) and nitrous oxide (N2O) are two greenhouse gases with much more warming potential than carbon dioxide (CO2). However, there have been less studies on their responses to climate warming and land use practices, such as hay harvest in grasslands. Especially, their fluxes are not well estimated during the nongrowing season. In this study, we investigated year-round (August 2015-August 2016) continuous measurements of CH4 and N2O fluxes in response to simulated warming, clipping (as a mimic of hay harvest), and their interaction in an alpine meadow on the Qinghai-Tibetan Plateau. Compared to the control, warming alone and in combination with clipping significantly increased CH4 uptake by 42% and 51%, respectively, on the annual basis. Warming alone also significantly decreased year-round N2O emission by 57% relative to that under control. However, clipping alone did not affect CH4 and N2O fluxes during the study period, and no significant interactive effect of clipping and warming was detected. Furthermore, warming had larger effects on CH4 uptake but smaller effects on N2O emission in the growing than nongrowing season. We also found that the responses in CH4 and N2O fluxes to different treatments were regulated by changes in soil temperature and moisture. Based on sustained global warming potential approach and expressed as CO2-equvalents, the ecosystem switched from a net source of these two gases in the control (1.2 g CO2-eq m(-2)) to a net sink in warming (-11.3 g CO2-eq m(-2)) and its combination with clipping (-9.9 g CO2-eq m(-2)). The findings highlight the importance of understanding greenhouse gas fluxes in the nongrowing season and suggest the increase of CH4 uptake and reduction in N2O emission under climate warming will benefit ecosystem feedback and help mitigate climate change.
资助项目	National Natural Science Foundation of China[31988102] ; National Natural Science Foundation of China[31625006] ; National Natural Science Foundation of China[31800404] ; Second Tibetan Plateau Scientific Expedition and Research (STEP) program[2019QZKK0302] ; International Postdoctoral Exchange Fellowship Program[20180005]
WOS关键词	GREENHOUSE-GAS FLUXES ; CLIMATE-CHANGE ; NITROGEN-FERTILIZATION ; METHANOTROPHIC COMMUNITIES ; PERMAFROST REGION ; SOIL CARBON ; GHG FLUX ; GRASSLAND ; METHANE ; CO2
WOS研究方向	Agriculture ; Forestry ; Meteorology & Atmospheric Sciences
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000608676000030
资助机构	National Natural Science Foundation of China ; Second Tibetan Plateau Scientific Expedition and Research (STEP) program ; International Postdoctoral Exchange Fellowship Program
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/136259]
专题	中国科学院地理科学与资源研究所
通讯作者	Wang, Jinsong; Niu, Shuli
作者单位	1.Beijing Forestry Univ, Res Ctr Forest Management Engn State Forestry & G, Beijing 100083, Peoples R China 2.No Arizona Univ, Ctr Ecosyst Sci & Soc, Dept Biol Sci, Flagstaff, AZ 86001 USA 3.Chinese Acad Sci, Key Lab Ecosyst Network Observat & Modeling, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China 4.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Wang, Jinsong,Luo, Yiqi,Quan, Quan,et al. Effects of warming and clipping on CH4 and N2O fluxes in an alpine meadow[J]. AGRICULTURAL AND FOREST METEOROLOGY,2021,297:10.
APA	Wang, Jinsong.,Luo, Yiqi.,Quan, Quan.,Ma, Fangfang.,Tian, Dashuan.,...&Niu, Shuli.(2021).Effects of warming and clipping on CH4 and N2O fluxes in an alpine meadow.AGRICULTURAL AND FOREST METEOROLOGY,297,10.
MLA	Wang, Jinsong,et al."Effects of warming and clipping on CH4 and N2O fluxes in an alpine meadow".AGRICULTURAL AND FOREST METEOROLOGY 297(2021):10.