气候变化领域集成服务门户(CCPortal): Different responses of ecosystem CO2 and N2O emissions and CH4 uptake to seasonally asymmetric warming in an alpine grassland of the Tianshan

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DOI	10.5194/bg-18-3529-2021
	Different responses of ecosystem CO2 and N2O emissions and CH4 uptake to seasonally asymmetric warming in an alpine grassland of the Tianshan
	Gong, Yanming; Yue, Ping; Li, Kaihui; Mohammat, Anwar; Liu, Yanyan
通讯作者	Liu, YY (通讯作者)，Chinese Acad Sci, State Key Lab Desert & Oasis Ecol, Xinjiang Inst Ecol & Geog, Urumqi 830011, Peoples R China.
发表日期	2021
ISSN	1726-4170
EISSN	1726-4189
起始页码	3529
结束页码	3537
卷号	18 期号:11
英文摘要	An experiment was conducted to investigate the effect of seasonally asymmetric warming on ecosystem respiration (Re), CH4 uptake, and N2O emissions in alpine grassland of the Tianshan of central Asia, from October 2016 to September 2019. The annual means of Re, CH4, and N2O fluxes in growing season were 42.83 mg C m(-2) h(-1), -41.57 mu g C m(-2) h(-1), and 4.98 ittg N m(-2) h(-1), respectively. Furthermore, warming during the non-growing season increased Re and CH4 uptake by 7.9 % and 10.6 % in the growing season and 10.5 % and 9.2 % in the non-growing season, respectively. However, the increase in N2O emission in the growing season was mainly caused by the warming during the growing season (by 29.7 %). The warming throughout the year and warming during the non-growing season increased N2O emissions by 101.9 % and 192.3 % in the non-growing season, respectively. The Re, CH4 uptake, and N2O emissions were positively correlated with soil temperature. Our results suggested that Re, CH4 uptake, and N2O emissions were regulated by soil temperature, rather than soil moisture, in the case of seasonally asymmetric warming. In addition, the response rate was defined by the changes in greenhouse gas fluxes driven by warming. In our field experiment, we observed the stimulatory effect of warming during the nongrowing season on Re and CH4 uptake. In contrast, the response rates of Re and N2O emissions were gradually attenuated by long-term annual warming, and the response rate of Re was also weakened by warming over the growing season. These findings highlight the importance of warming in the non-growing season in regulating greenhouse gas fluxes, a finding which is crucial for improving our understanding of C and N cycles under the scenarios of global warming.
关键词	NITROUS-OXIDE EMISSIONS METHANE UPTAKE CARBON FLUXES SOIL THAW
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Geology
WOS类目	Ecology ; Geosciences, Multidisciplinary
WOS记录号	WOS:000664000300001
来源期刊	BIOGEOSCIENCES
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/254216
作者单位	[Gong, Yanming; Li, Kaihui; Mohammat, Anwar; Liu, Yanyan] Chinese Acad Sci, State Key Lab Desert & Oasis Ecol, Xinjiang Inst Ecol & Geog, Urumqi 830011, Peoples R China; [Yue, Ping] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Urat Desert Grassland Res Stn, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Gong, Yanming,Yue, Ping,Li, Kaihui,et al. Different responses of ecosystem CO2 and N2O emissions and CH4 uptake to seasonally asymmetric warming in an alpine grassland of the Tianshan[J]. 中国科学院西北生态环境资源研究院,2021,18(11).
APA	Gong, Yanming,Yue, Ping,Li, Kaihui,Mohammat, Anwar,&Liu, Yanyan.(2021).Different responses of ecosystem CO2 and N2O emissions and CH4 uptake to seasonally asymmetric warming in an alpine grassland of the Tianshan.BIOGEOSCIENCES,18(11).
MLA	Gong, Yanming,et al."Different responses of ecosystem CO2 and N2O emissions and CH4 uptake to seasonally asymmetric warming in an alpine grassland of the Tianshan".BIOGEOSCIENCES 18.11(2021).