Linking riverine partial pressure of carbon dioxide to dissolved organic matter optical properties in a Dry-hot Valley Region

doi:10.1016/j.scitotenv.2019.135353

	Linking riverine partial pressure of carbon dioxide to dissolved organic matter optical properties in a Dry-hot Valley Region
	Ni, Maofei 2,3; Li, Siyue 2; Santos, Isaac 1; Zhang, Jing 2,4; Luo, Jiachen 2,3
刊名	SCIENCE OF THE TOTAL ENVIRONMENT
	2020-02-20
卷号	704 页码:10
关键词	Dissolved organic matter (DOM) (CO)2partial pressure (pCO(2)) Trophic levels pCO(2 )- DOM couplings Longitudinal Range-Gorge region
ISSN号	0048-9697
DOI	10.1016/j.scitotenv.2019.135353
通讯作者	Li, Siyue(syli2006@163.com)
英文摘要	The mineralization of dissolved organic matter (DOM) can partially explain riverine carbon dioxide (CO2) emissions to the atmosphere. However, little is known about how the DOM origin and composition drive CO2 partial pressures (pCO(2)). Here, we reveal links between aquatic pCO(2), DOM optical parameters (a(254), a(350) and S-275(-295) and S-350(-400)) and nutrients in a subtropical river in China's Dry-hot Valley Region. Biodegradation preferentially decomposed low molecular weight (LMW) DOMs, increasing high molecular weight (HMW) DOMs along the main stem. pCO(2) was positively correlated with aromatic and lignin compounds, but negatively correlated with DOM molecular weight. Aquatic respiration of DOMs largely explained the pCO(2) levels in the drought period, while terrestrial inputs were a pCO(2) source in the initial-wet period. Our results illustrate how both DOM concentrations and speciation can explain pCO(2) distribution and sources in rivers. (C) 2019 Elsevier B.V. All rights reserved.
资助项目	National Natural Science Foundation of China[31670473] ; the Hundred-Talent Programof the Chinese Academy of Sciences
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000504672800089
内容类型	期刊论文
源URL	[http://119.78.100.138/handle/2HOD01W0/10113]
专题	中国科学院重庆绿色智能技术研究院
通讯作者	Li, Siyue
作者单位	1.Southern Cross Univ, Natl Marine Sci Ctr, POB 4321, Coffs Harbour, NSW 2450, Australia 2.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Res Ctr Ecohydrol, Key Lab Reservoir Aquat Environm, Chongqing 400714, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Southwest Univ, Coll Resources & Environm, Chongqing 400716, Peoples R China
推荐引用方式 GB/T 7714	Ni, Maofei,Li, Siyue,Santos, Isaac,et al. Linking riverine partial pressure of carbon dioxide to dissolved organic matter optical properties in a Dry-hot Valley Region[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2020,704:10.
APA	Ni, Maofei,Li, Siyue,Santos, Isaac,Zhang, Jing,&Luo, Jiachen.(2020).Linking riverine partial pressure of carbon dioxide to dissolved organic matter optical properties in a Dry-hot Valley Region.SCIENCE OF THE TOTAL ENVIRONMENT,704,10.
MLA	Ni, Maofei,et al."Linking riverine partial pressure of carbon dioxide to dissolved organic matter optical properties in a Dry-hot Valley Region".SCIENCE OF THE TOTAL ENVIRONMENT 704(2020):10.