Hysteretic relationship between plant productivity and methane uptake in an alpine meadow

doi:10.1016/j.agrformet.2020.107982

	Hysteretic relationship between plant productivity and methane uptake in an alpine meadow
	Chen, Weinan 1,2; Wang, Bingxue 1; Zhang, Fangyue 1,2; Li, Zhaolei 1; Wang, Jinsong 1; Yu, Guirui 1,2; Wen, Xuefa 1,2; Niu, Shuli 1,2
刊名	AGRICULTURAL AND FOREST METEOROLOGY
	2020-07-15
卷号	288 页码:8
关键词	Plant productivity Methane flux Hysteresis Alpine meadow
ISSN号	0168-1923
DOI	10.1016/j.agrformet.2020.107982
通讯作者	Niu, Shuli(sniu@igsnrr.ac.cn)
英文摘要	The relationship between methane (CH4) and gross primary productivity (GPP) remains elusive and the underlying mechanism is even far from clear. To explore this relationship, we continually monitored CH4 flux and CO2 flux by eddy covariance technique in an alpine meadow on the Qinghai-Tibetan Plateau, China, during June 2015-December 2017. We found a parabolic-like relationship of net CH4 flux with GPP change in both the morning and afternoon at diurnal scale. However, with similar GPP, CH4 uptake was stronger in the morning than that in the afternoon, forming an anti-clockwise hysteretic relationship between CH4 and GPP in all the three years. Meanwhile, similar hysteresis loop was also observed between CH4 flux and photosynthetically active radiation (PAR), and between PAR and air temperature (Ta) during all the three years, with stronger CH4 uptake (or lower Ta) in the morning than that in the afternoon at the same PAR. Results from our study suggested that the hysteretic relationship between CH4 flux and GPP might be mainly induced by the hysteresis between PAR and Ta. The similar hysteresis pattern between CH4 flux (or Ta) and PAR in the non-growing season further confirmed our hypothesis. The findings provide new insights into the coupling of plant photosynthetic activity and net CH4 flux and help to improve model parameterization for simulating CO2-CH4 interaction processes.
资助项目	National Natural Science Foundation of China[31625006] ; National Natural Science Foundation of China[31988102] ; CAS international collaboration program[131A11KYSB20180010]
WOS关键词	TIBETAN PLATEAU ; VASCULAR PLANTS ; SPATIAL VARIABILITY ; TUNDRA ECOSYSTEMS ; CARBON TURNOVER ; DIEL VARIATION ; CH4 EMISSION ; WET-SEDGE ; VEGETATION ; CO2
WOS研究方向	Agriculture ; Forestry ; Meteorology & Atmospheric Sciences
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000538107200002
资助机构	National Natural Science Foundation of China ; CAS international collaboration program
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/159486]
专题	中国科学院地理科学与资源研究所
通讯作者	Niu, Shuli
作者单位	1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China 2.Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Chen, Weinan,Wang, Bingxue,Zhang, Fangyue,et al. Hysteretic relationship between plant productivity and methane uptake in an alpine meadow[J]. AGRICULTURAL AND FOREST METEOROLOGY,2020,288:8.
APA	Chen, Weinan.,Wang, Bingxue.,Zhang, Fangyue.,Li, Zhaolei.,Wang, Jinsong.,...&Niu, Shuli.(2020).Hysteretic relationship between plant productivity and methane uptake in an alpine meadow.AGRICULTURAL AND FOREST METEOROLOGY,288,8.
MLA	Chen, Weinan,et al."Hysteretic relationship between plant productivity and methane uptake in an alpine meadow".AGRICULTURAL AND FOREST METEOROLOGY 288(2020):8.