干旱区生态环境知识资源中心(Arid): Eutrophication decreased CO2 but increased CH4 emissions from lake: A case study of a shallow Lake Ulansuhai

Arid

DOI	10.1016/j.watres.2021.117363
	Eutrophication decreased CO2 but increased CH4 emissions from lake: A case study of a shallow Lake Ulansuhai
	Sun, Heyang; Lu, Xixi; Yu, Ruihong; Yang, Jie; Liu, Xinyu; Cao, Zhengxu; Zhang, Zhuangzhuang; Li, Meixia; Geng, Yue
通讯作者	Yu, RH ; Yang, J (corresponding author), Inner Mongolia Univ, Sch Ecol & Environm, Inner Mongolia Key Lab River & Lake Ecol, Hohhot 010021, Peoples R China.
来源期刊	WATER RESEARCH
ISSN	0043-1354
EISSN	1879-2448
出版年	2021
卷号	201
英文摘要	Eutrophic lakes, especially shallow eutrophic lakes, disproportionately contribute to greenhouse gas (GHG) emissions. To investigate the effects of eutrophication on GHG dynamics, we conducted field measurements every three months from January 2019 to October 2019 in Lake Ulansuhai, a shallow eutrophic lake (mean depth of 0.7 m) located in a semi-arid region in Northern China. We found that Lake Ulansuhai was a predominantly source of atmospheric carbon dioxide (CO2); however, it converted to a CO2 sink in July due to eutrophication. It was also a strong source of methane (CH4) with a mean CO2 emission of 35.7 +/- 12.1 mmol m- 2 d-1 and CH4 emission of 5.9 +/- 2.9 mmol m- 2 d-1. The CO2 concentrations in most sites and CH4 concentrations in all sites were supersaturated, with the average partial pressure of CO2 (pCO2) being 654 +/- 34 mu atm and the partial pressure of CH4 (pCH4) being 157 +/- 37 mu atm. The partial pressures and emissions of the greenhouse gases exhibited substantial seasonal and spatial variations. The correlation analysis between the trophic level index and the partial pressure of the greenhouse gases indicated that eutrophication could significantly decrease the CO2 emissions but increase the CH4 emissions from the lake, resulting in a CH4 and CO2 emission ratio of approximately 2 in terms of global warming potential. Eutrophication decreased the pCO2 in the lake and subsequently increased the pCH4 due to nutrient input, thereby enhancing primary production. The results indicated that shallow eutrophic lakes in arid regions are strong sources of CH4 and that eutrophication could alter the greenhouse gas emission patterns.
英文关键词	Eutrophication Lake Ulansuhai Temporal and spatial changes Partial pressure of greenhouse gases Greenhouse gas emissions
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000681713400007
WOS关键词	CARBON-DIOXIDE EMISSIONS ; HARD-WATER LAKES ; METHANE EMISSIONS ; TERRESTRIAL CARBON ; SEASONAL DYNAMICS ; PARTIAL-PRESSURE ; UNITED-STATES ; TROPHIC STATE ; FLUXES ; SURFACE
WOS类目	Engineering, Environmental ; Environmental Sciences ; Water Resources
WOS研究方向	Engineering ; Environmental Sciences & Ecology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/364860
作者单位	[Sun, Heyang; Lu, Xixi; Yu, Ruihong; Yang, Jie; Liu, Xinyu; Cao, Zhengxu; Zhang, Zhuangzhuang; Li, Meixia; Geng, Yue] Inner Mongolia Univ, Sch Ecol & Environm, Inner Mongolia Key Lab River & Lake Ecol, Hohhot 010021, Peoples R China; [Yu, Ruihong] Minist Educ, Key Lab Mongolian Plateau Ecol & Resource Utiliza, Hohhot 010021, Peoples R China; [Yang, Jie] Buereau Ecol & Environm Inner Mongolia Autonomous, Hohhot 010021, Peoples R China; [Lu, Xixi] Natl Univ Singapore, Dept Geog, Singapore 117570, Singapore
推荐引用方式 GB/T 7714	Sun, Heyang,Lu, Xixi,Yu, Ruihong,et al. Eutrophication decreased CO2 but increased CH4 emissions from lake: A case study of a shallow Lake Ulansuhai[J],2021,201.
APA	Sun, Heyang.,Lu, Xixi.,Yu, Ruihong.,Yang, Jie.,Liu, Xinyu.,...&Geng, Yue.(2021).Eutrophication decreased CO2 but increased CH4 emissions from lake: A case study of a shallow Lake Ulansuhai.WATER RESEARCH,201.
MLA	Sun, Heyang,et al."Eutrophication decreased CO2 but increased CH4 emissions from lake: A case study of a shallow Lake Ulansuhai".WATER RESEARCH 201(2021).