Spatial variations in diffusive methane fluxes and the role of eutrophication in a subtropical shallow lake

	Spatial variations in diffusive methane fluxes and the role of eutrophication in a subtropical shallow lake
	Zhang, Lei; Liao, Qianjiahua; Gao, Rui; Luo, Ran; Liu, Cheng; Zhong, Jicheng; Wang, Zhaode
刊名	SCIENCE OF THE TOTAL ENVIRONMENT
	2021
卷号	759
英文摘要	Shallow lakes account for most of the diffusive CH4 emissions fromglobal lakes, and they also suffer from eutrophication worldwide. Determining the effect of eutrophication on diffusive CH4 fluxes is fundamental to understanding CH4 emissions in shallow lakes. This study aimed to investigate the spatial variations in diffusive CH4 fluxes and explore the role of eutrophication in Lake Chaohu, a large and shallow eutrophic lake in the lower reaches of the Yangtze River. A one-year field observation was carried out to examine CH4 concentrations in the sediment and water and the diffusive fluxes of CH4 across the sediment-water interface (Fs-w) and waterair interface (Fw-a). Both Fs-w (0.306-1.56 m mol m(-2) d(-1)) and Fw-a (0.097-0.529 m mol m(-2) d(-1)) were upward and showed significant spatial heterogeneity and were significantly positively correlated. Parameters related to eutrophication had significant positive relationshipswith Fw-a, and the total phosphorus distribution in thewater explained the greatest proportion of the spatial variation in Fw-a. Distance to shore and water depth were inversely correlated with Fw-a and modified the effects of eutrophication. Overall, the results provide direct evidence of the key role of eutrophication in shaping the spatial distribution of diffusive CH4 fluxes and a scientific basis for predicting changes in CH4 emissions with future eutrophication changes in shallow lakes in subtropical zones. (C) 2020 Elsevier B.V. All rights reserved.
内容类型	期刊论文
源URL	[http://159.226.73.51/handle/332005/20602]
专题	中国科学院南京地理与湖泊研究所
推荐引用方式 GB/T 7714	Zhang, Lei,Liao, Qianjiahua,Gao, Rui,et al. Spatial variations in diffusive methane fluxes and the role of eutrophication in a subtropical shallow lake[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2021,759.
APA	Zhang, Lei.,Liao, Qianjiahua.,Gao, Rui.,Luo, Ran.,Liu, Cheng.,...&Wang, Zhaode.(2021).Spatial variations in diffusive methane fluxes and the role of eutrophication in a subtropical shallow lake.SCIENCE OF THE TOTAL ENVIRONMENT,759.
MLA	Zhang, Lei,et al."Spatial variations in diffusive methane fluxes and the role of eutrophication in a subtropical shallow lake".SCIENCE OF THE TOTAL ENVIRONMENT 759(2021).