气候变化领域集成服务门户(CCPortal): Effect of water-level fluctuations on methane and carbon dioxide dynamics in a shallow lake of Northern China: Implications for wetland restoration

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DOI	10.1016/j.jhydrol.2021.126169
	Effect of water-level fluctuations on methane and carbon dioxide dynamics in a shallow lake of Northern China: Implications for wetland restoration
	Yuan, Xiaomin; Liu, Qiang; Cui, Baoshan; Xu, Xiaofeng; Liang, Liqiao; Sun, Tao; Yan, Sirui; Wang, Xuan; Li, Chunhui; Li, Shuzhen; Li, Miao
通讯作者	Liu, Q (通讯作者)
发表日期	2021
ISSN	0022-1694
EISSN	1879-2707
卷号	597
英文摘要	Shallow lakes are characterized by strong hydrological fluctuations, affecting their biochemistry and carbon (C) balance. This study explored carbon dioxide (CO2) and methane (CH4) flux under strong water-level fluctuations in a shallow lake while also addressing its implications regarding wetland restoration. The DeNitrification-DeComposition (DNDC) model, a process-based biogeochemical model, was used to simulate CO2 and CH4 flux under intensive water-level fluctuations in Lake Baiyangdian (BYD), Northern China. Results showed that: (i) the DNDC model was able to reasonably capture CO2 and CH4 dynamics, which were determined to be extremely sensitive to water-depth fluctuations at a -10 cm to 10 cm range; (ii) the lowest CO2 flux was observed at a 40-day duration, while the trend in annual CH4 flux was to increase as inundation time increased, changing from -2.27 kg C/ha/y to 1.57 kg C/ha/y; and (iii) CO2 and CH4 flux increased under higher fluctuation frequencies, wherein CO2 flux was lowest in January and February and CH4 flux increased from December to March under certain frequencies. Our results indicate that water-level fluctuations (e.g., water depth, duration, frequency, and timing) affected both CO2 and CH4 flux. As it pertains to water diversion projects used for shallow lake restoration initiatives, the optimum approach, pertinent to water yields, diversion time, and duration, should first be considered carefully. Results from this study provide useful information for assisting policymakers with respect to reducing gaseous C emissions during ecological water transfer project regulations in shallow lakes.
关键词	MODELING ECOSYSTEM RESPONSES PHOSPHORUS DYNAMICS PRESCRIBED FIRES REGIME SHIFTS POYANG LAKE GAS FLUXES LONG-TERM SOIL VEGETATION EMISSIONS
英文关键词	Shallow lake; Carbon emission; Methane emission; Water-level fluctuation; DNDC model
语种	英语
WOS研究方向	Engineering ; Geology ; Water Resources
WOS类目	Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS记录号	WOS:000652835600054
来源期刊	JOURNAL OF HYDROLOGY
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/260278
推荐引用方式 GB/T 7714	Yuan, Xiaomin,Liu, Qiang,Cui, Baoshan,et al. Effect of water-level fluctuations on methane and carbon dioxide dynamics in a shallow lake of Northern China: Implications for wetland restoration[J]. 中国科学院青藏高原研究所,2021,597.
APA	Yuan, Xiaomin.,Liu, Qiang.,Cui, Baoshan.,Xu, Xiaofeng.,Liang, Liqiao.,...&Li, Miao.(2021).Effect of water-level fluctuations on methane and carbon dioxide dynamics in a shallow lake of Northern China: Implications for wetland restoration.JOURNAL OF HYDROLOGY,597.
MLA	Yuan, Xiaomin,et al."Effect of water-level fluctuations on methane and carbon dioxide dynamics in a shallow lake of Northern China: Implications for wetland restoration".JOURNAL OF HYDROLOGY 597(2021).