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Anthropogenic land use substantially increases riverine CO2 emissions

文献类型：期刊论文

作者Gu, Shijie4,5,6; Li, Siyue2; Santos, Isaac R.1,3
刊名JOURNAL OF ENVIRONMENTAL SCIENCES
出版日期2022-08-01
卷号118页码:158-170
ISSN号1001-0742
关键词River carbon Inland waters Greenhouse gases Climate change Water quality Headwater streams
DOI10.1016/j.jes.2021.12.040
通讯作者Li, Siyue(syli2006@163.com)
英文摘要Carbon dioxide (CO2) emissions from inland waters to the atmosphere are a pivotal component of the global carbon budget. Anthropogenic land use can influence riverine CO2 emissions, but empirical data exploring cause-effect relationships remain limited. Here, we investigated CO2 partial pressures (pCO(2)) and degassing in a monsoonal river (Yue River) within the Han River draining to the Yangtze in China. Almost 90% of river samples were supersaturated in CO2 with a mean f standard deviation of 1474 +/- 1614 mu atm, leading to emissions of 557 - 971 mmol/m(2)/day from river water to the atmosphere. Annual CO2 emissions were 1.6 - 2.8 times greater than the longitudinal exports of riverine dissolved inorganic and organic carbon. pCO(2) was positively correlated to anthropogenic land use (urban and farmland), and negatively correlated to forest cover. pCO(2) also had significant and positive relationships with total dissolved nitrogen and total dissolved phosphorus. Stepwise multiple regression models were developed to predict pCO(2). Farmland and urban land released nutrients and organic matter to the river system, driving riverine pCO(2) enrichment due to enhanced respiration in these heterotrophic rivers. Overall, we show the crucial role of land use driving riverine pCO(2), which should be considered in future large-scale estimates of CO2 emissions from streams. Land use change can thus modify the carbon balance of urban-river systems by enhancing river emissions, and reforestation helps carbon neutral in rivers. (C) 2022 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.
资助项目National Natural Science Foundation of China[31670473] ; Key Program of the Chinese Academy of Sciences[ZDRW-ZS-2016-7-2] ; Youth Innovation Promotion Association of CAS[2020378]
WOS研究方向Environmental Sciences & Ecology
语种英语
出版者SCIENCE PRESS
WOS记录号WOS:000773306700016
源URL[http://119.78.100.138/handle/2HOD01W0/15618]  
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.Univ Gothenburg, Dept Marine Sci, S-41296 Gothenburg, Sweden
2.Wuhan Inst Technol, Res Ctr Environm Ecol & Engn,Key Lab Novel Reacto, Inst Changjiang Water Environm & Ecol Secur, Sch Environm Ecol & Biol Engn,Key Lab Green Chem, Wuhan 430205, Peoples R China
3.Southern Cross Univ, Natl Marine Sci Ctr, Coffs Harbour, NSW 2450, Australia
4.Chongqing Jiaotong Univ, Sch River & Ocean Engn, Chongqing 400074, Peoples R China
5.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Key Lab Reservoir Aquat Environm, Chongqing 400714, Peoples R China
6.Univ Chinese Acad Sci, Chongqing Sch, Chongqing 400714, Peoples R China
推荐引用方式
GB/T 7714		 Gu, Shijie,Li, Siyue,Santos, Isaac R.. Anthropogenic land use substantially increases riverine CO2 emissions[J]. JOURNAL OF ENVIRONMENTAL SCIENCES,2022,118:158-170.
APA Gu, Shijie,Li, Siyue,&Santos, Isaac R..(2022).Anthropogenic land use substantially increases riverine CO2 emissions.JOURNAL OF ENVIRONMENTAL SCIENCES,118,158-170.
MLA Gu, Shijie,et al."Anthropogenic land use substantially increases riverine CO2 emissions".JOURNAL OF ENVIRONMENTAL SCIENCES 118(2022):158-170.

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来源：重庆绿色智能技术研究院

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