Nitrogen removal in the Chaohu Lake, China: Implication in estimating lake N uptake velocity and modelling N removal efficiency of large lakes and reservoirs in the Changjiang River network

doi:10.1016/j.ecolind.2021.107353

	Nitrogen removal in the Chaohu Lake, China: Implication in estimating lake N uptake velocity and modelling N removal efficiency of large lakes and reservoirs in the Changjiang River network
	Li, Qingqian 1,2; Yu, Qibiao 1,3; Wang, Fang 1; Yan, Weijin 1; Wang, Jianing 4
刊名	ECOLOGICAL INDICATORS
	2021-05-01
卷号	124 页码:12
关键词	Denitrogen Nitrogen removal efficiency Uptake velocity Shallow eutrophic lake Reservoirs Changjiang River network
ISSN号	1470-160X
DOI	10.1016/j.ecolind.2021.107353
通讯作者	Yan, Weijin(yanwj@igsnrr.ac.cn)
英文摘要	Lakes and reservoirs are important inland waterscapes in linking nitrogen (N) transport and removal from the terrestrial to marine ecosystems. N removal processes eliminate N permanently from lakes and reservoirs, including denitogen, permanent burial and biomass harvest. The N removal efficiency (R-_removal, i.e. the fraction of N removal amount against total N loads to the lake) is an important parameter for the quantification of N removal from lakes and reservoirs. Intrinsically, R-_removal depends on hydrologic load and total N uptake velocity (V-f_removal). However, it is a challenge in determining Vf_removal which can be used to model R-_removal of lakes and reservoirs. Furthermore, there is less studies in distinguishing the N uptake velocity of individual processes from each other. Here, we estimated the magnitude of each uptake velocity of N removal processes with field observed data, and further presented an integrated V-f_removal to estimate R-_removal of a typical eutrophic lake (the Chaohu Lake) in Eastern China. The mean dinitrogen emission rate was 1.23 +/- 0.83 mg N m(-2) h(-1) in Chaohu Lake in 2016. The uptake velocity of denitrogen, permanent N burial and biomass harvest was 2.67 m yr(-1), 0.25 m yr(-1) and 0.23 m yr(-1), respectively. The removal efficiency of denitrogen, permanent N burial and biomass harvest was 26.14%, 2.76% and 2.56%, respectively. The integrated value of V-f_ removal was 3.33 m yr(-1). We finally compiled hydrological data of 566 large reservoirs in Changjiang River network, and modelled the N removal by combining our estimated value of V-f_removal with hydrological data. We found a significant power relationship between N removal and the reservoir discharge, which can predict the variation of N removal of each reservoir in Changjiang River network. Our research helps to understand N removal in lakes and reservoirs at an entire river network scale.
资助项目	National Natural Science Foundation of China[41371454] ; National Natural Science Foundation of China[42077304] ; National Key Research and Development Program of China[2016YFA0601004]
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000624330900002
资助机构	National Natural Science Foundation of China ; National Key Research and Development Program of China
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/162098]
专题	中国科学院地理科学与资源研究所
通讯作者	Yan, Weijin
作者单位	1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China 3.Xiamen Univ, Coll Environm & Ecol, Fujian Prov Key Lab Coastal Ecol & Environm Studi, Key Lab Coastal & Wetland Ecosyst, Xiamen 361102, Peoples R China 4.Chinese Acad Environm Planning, Beijing 100012, Peoples R China
推荐引用方式 GB/T 7714	Li, Qingqian,Yu, Qibiao,Wang, Fang,et al. Nitrogen removal in the Chaohu Lake, China: Implication in estimating lake N uptake velocity and modelling N removal efficiency of large lakes and reservoirs in the Changjiang River network[J]. ECOLOGICAL INDICATORS,2021,124:12.
APA	Li, Qingqian,Yu, Qibiao,Wang, Fang,Yan, Weijin,&Wang, Jianing.(2021).Nitrogen removal in the Chaohu Lake, China: Implication in estimating lake N uptake velocity and modelling N removal efficiency of large lakes and reservoirs in the Changjiang River network.ECOLOGICAL INDICATORS,124,12.
MLA	Li, Qingqian,et al."Nitrogen removal in the Chaohu Lake, China: Implication in estimating lake N uptake velocity and modelling N removal efficiency of large lakes and reservoirs in the Changjiang River network".ECOLOGICAL INDICATORS 124(2021):12.