干旱区生态环境知识资源中心(Arid): Salinity decreases methane concentrations in Chinese lakes

Arid

DOI	10.1016/j.scitotenv.2024.173412
	Salinity decreases methane concentrations in Chinese lakes
	Liu, Hu; Xiao, Shangbin; Liu, Weiguo; Wang, Huanye; Liu, Zhonghui; Li, Xiangzhong; Zhang, Ping; Liu, Jia
通讯作者	Liu, J
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
EISSN	1879-1026
出版年	2024
卷号	937
英文摘要	Lakes are important sources of methane (CH 4 ), and understanding the influence of environmental factors on CH 4 concentration in lake water is crucial for accurately assessing CH 4 emission from lakes. In this study, we investigated CH 4 concentration in two connected Tibetan Plateau lakes, Lake Keluke (an open freshwater lake) and Lake Tuosu (a closed saline lake), through in -situ continuous measurements taken in different months from 2021 to 2023. The results show substantial spatial and seasonal variations in CH 4 concentrations in the two lakes, while the CH 4 concentrations in Lake Keluke are consistently higher than those in Lake Tuosu for each month. Despite sharing similar environmental conditions due to connected (e.g. pH, water temperature, dissolved oxygen content, and total organic carbon content), the critical difference between the two lakes is their salinity. This implies that salinity is the critical factor contributing to the decrease in CH 4 concentrations in Lake Tuosu, possibly due to the changes in microbial species between freshwater and brackish/saline lakes. Additionally, to further validate the effect of salinity on CH 4 concentrations in lake water, we compared the CH 4 concentrations of 33 lakes (including 5 saline lakes and 28 freshwater lakes) from the Tibetan Plateau, Chinese Loess Plateau, and Yangtze Plain, and found that saline lakes consistently exhibit lower CH 4 concentrations (avg. 0.08 mu mol/L), while freshwater lakes generally display higher CH 4 concentrations (avg. 1.25 mu mol/L) with considerable fluctuations. Consequently, freshwater and saline lakes exhibit distinct CH 4 emissions, which could be used for more accurate estimation of global CH 4 emission from lakes.
英文关键词	CH4 concentration Salinity Freshwater lake Saline lake
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001247366600001
WOS关键词	HUMID/SEMI-ARID REGION ; INLAND WATERS ; TIBETAN PLATEAU ; CARBON-DIOXIDE ; SEDIMENTS ; RESERVOIRS ; EMISSIONS ; DYNAMICS ; CH4 ; CO2
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/405508
推荐引用方式 GB/T 7714	Liu, Hu,Xiao, Shangbin,Liu, Weiguo,et al. Salinity decreases methane concentrations in Chinese lakes[J],2024,937.
APA	Liu, Hu.,Xiao, Shangbin.,Liu, Weiguo.,Wang, Huanye.,Liu, Zhonghui.,...&Liu, Jia.(2024).Salinity decreases methane concentrations in Chinese lakes.SCIENCE OF THE TOTAL ENVIRONMENT,937.
MLA	Liu, Hu,et al."Salinity decreases methane concentrations in Chinese lakes".SCIENCE OF THE TOTAL ENVIRONMENT 937(2024).