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题名: Spatio-temporal variations of GHG emissions from surface water of Xiangxi River in Three Gorges Reservoir region, China
作者: Huang, Wenmin1, 2; Bi, Yonghong1; Hu, Zhengyu1; Zhu, Kongxian1, 3; Zhao, Wei1, 3; Yuan, Xigong1, 3
关键词: Xiangxi River ; CH4 ; CO2 ; N2O ; Spatio-temporal variation ; Three Gorges Reservoir
刊名: ECOLOGICAL ENGINEERING
发表日期: 2015-10-01
DOI: 10.1016/j.ecoleng.2015.04.088
卷: 83, 页:28-32
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ; Life Sciences & Biomedicine ; Technology
类目[WOS]: Ecology ; Engineering, Environmental ; Environmental Sciences
研究领域[WOS]: Environmental Sciences & Ecology ; Engineering
英文摘要: Damming has exerted far-reaching and profound impacts on ecological functions in river ecosystems. However, the "damming effects" on greenhouse gases (GHG) emissions from tributaries of reservoirs in subtropical region were largely overlooked. In this study, we assessed the GHG fluxes (CH4, CO2 and N2O) from air-water interface and the related factors in Xiangxi River of Three Gorges Reservoir (TGR) region over one year. The annual average fluxes of CH4, CO2 and N2O from Xiangxi River were 0.13 +/- 0.11 mg m(-2) h(-1), 16.01 +/- 23.21 mg m(-2) h(-1) and 21.57 +/- 12.75 mg m(-2) h(-1), respectively, which were significantly lower than those from tropical rivers or lakes. The GHG fluxes showed strong seasonal dynamics: CH4 was consistently released to the atmosphere and was more in summer than the other seasons. CO2 was absorbed from the atmosphere in spring, but was emitted the most in winter. N2O flux was higher in cold season than in warm season. Additionally, CH4 emission showed obvious spatial variations that decreased gradually from shallow to deep water-level areas. Correlation analysis demonstrated that CH4 emission was negatively correlated with water depth and air-water temperature difference, and positively with air temperature. CO2 flux was negatively related to chlorophyll a (Chl. a) and N2O flux was negatively correlated with dissolved oxygen (DO). The present study will deepen our understanding of Three Gorges Dam (TGD) construction impacts on GHG emissions in the tributaries, and help us to better estimate GHG emissions for TGR. (C) 2015 Elsevier B.V. All rights reserved.
关键词[WOS]: NITROUS-OXIDE N2O ; CARBON-DIOXIDE ; GREENHOUSE GASES ; HYDROELECTRIC RESERVOIR ; METHANE ; LAKE ; CO2 ; MITIGATION ; SYSTEM ; FLUXES
语种: 英语
WOS记录号: WOS:000360812000005
ISSN号: 0925-8574
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/27193
Appears in Collections:藻类生物学及应用研究中心_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Hydrobiol, Key Lab Algal Biol, Wuhan 430072, Peoples R China
2.Chinese Acad Sci, Wuhan Bot Garden, Key Lab Aquat Bot & Watershed Ecol, Wuhan 430074, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
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