Headwater stream ecosystem: an important source of greenhouse gases to the atmosphere

doi:10.1016/j.watres.2020.116738

	Headwater stream ecosystem: an important source of greenhouse gases to the atmosphere
	Li, Mingxu 2; Peng, Changhui 1,4; Zhang, Kerou 3; Xu, Li 2; Wang, Jianming 2; Yang, Yan 2; Li, Peng 1; Liu, Zelin 1; He, Nianpeng 2
刊名	WATER RESEARCH
	2021-02-15
卷号	190 页码:9
关键词	Riverine GHG emissions Stream order Headwater stream oxygen level Carbon/Nitrogen input
ISSN号	0043-1354
DOI	10.1016/j.watres.2020.116738
通讯作者	Peng, Changhui(peng.changhui@uqam.ca) ; He, Nianpeng(henp@igsnrr.ac.cn)
英文摘要	Although an increasing number of reports have revealed that rivers are important sources of greenhouse gases (GHGs), the magnitude and underlying mechanism of riverine GHG emissions are still poorly understood. The global extent of the headwater stream ecosystem may represent one of the important GHG emitters. A global database of GHG measurements from 595 rivers, indicated that the concentrations of riverine GHGs continually decrease as the stream order increases. Further analysis suggested that high GHG emissions from headwater streams (Strahler stream orders of 1 to 3) could be related to the low levels of dissolved oxygen, massive terrestrially derived carbon/nitrogen inputs and large gas exchange velocity. Through a combination of the predicted river surface areas and gas transfer velocities, we estimated that globally, the rivers emit approximately 6.6 (5.5-7.8) Pg CO2, 29.5 (19.6-37.3) Tg CH4, and 0.6 (0.2-0.9) Tg N2O per year, and totally emit 7.6 (6.1-9.1) CO2 equivalent into atmosphere per year. The headwater streams contribute 72.3%, 75.5%, and 77.2% of the global riverine CO2, CH4, and N2O emissions, respectively. This study presents a systematic estimation of GHG emissions from river ecosystems worldwide and highlights the dominant role played by headwater streams in GHG evasions from global rivers. (c) 2020 Elsevier Ltd. All rights reserved.
资助项目	Second Tibetan Plateau Scientific Expedition and Research Program[2019QZKK060602] ; National Key R&D Program of China[2017YFA0604803] ; Natural Science Foundation in China[31988102]
WOS研究方向	Engineering ; Environmental Sciences & Ecology ; Water Resources
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000632807700045
资助机构	Second Tibetan Plateau Scientific Expedition and Research Program ; National Key R&D Program of China ; Natural Science Foundation in China
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/161734]
专题	中国科学院地理科学与资源研究所
通讯作者	Peng, Changhui; He, Nianpeng
作者单位	1.Hunan Normal Univ, Coll Resources & Environm Sci, Changsha 410081, Peoples R China 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China 3.Chinese Acad Forestry, Inst Wetland Res, Beijing 100091, Peoples R China 4.Univ Quebec, Inst Environm Sci, Dept Biol Sci, CP 8888,Succ Ctr Ville, Montreal, PQ H3C 3P8, Canada
推荐引用方式 GB/T 7714	Li, Mingxu,Peng, Changhui,Zhang, Kerou,et al. Headwater stream ecosystem: an important source of greenhouse gases to the atmosphere[J]. WATER RESEARCH,2021,190:9.
APA	Li, Mingxu.,Peng, Changhui.,Zhang, Kerou.,Xu, Li.,Wang, Jianming.,...&He, Nianpeng.(2021).Headwater stream ecosystem: an important source of greenhouse gases to the atmosphere.WATER RESEARCH,190,9.
MLA	Li, Mingxu,et al."Headwater stream ecosystem: an important source of greenhouse gases to the atmosphere".WATER RESEARCH 190(2021):9.