Significantly depleted N-15 in suspended particulate organic matter indicating a strong influence of sewage loading in Daya Bay, China

doi:10.1016/j.scitotenv.2018.09.076

GIG OpenIR

	Ke, Zhixin 1,2,3; Tan, Yehui 1,3; Huang, Liangmin 1,3; Liu, Jiaxing 1; Xiang, Chenhui 1; Zhao, Chunyu 1; Zhang, Jingping 1
	Significantly depleted N-15 in suspended particulate organic matter indicating a strong influence of sewage loading in Daya Bay, China
刊名	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN号	0048-9697
	2019-02-10
卷号	650 页码:759-768
DOI	10.1016/j.scitotenv.2018.09.076
语种	英语
WOS研究方向	Environmental Sciences & Ecology
摘要	The influence of anthropogenic nutrient loading on the stable isotopic signatures (delta C-13 and delta N-15) in the suspended particulate organic matter (SPOM) is still not fully understood. Water quality and the values of delta C-13 and delta N-15 in the SPOM were investigated in the surface water of Daya Bay during the spring of 2016 and 2017. The results indicated that the Dan'ao River is the main point source of nutrient pollution in Daya Bay. The delta N-15(POM) was very low in the Dan'ao River. The distribution pattern for this parameter in Daya Bay was determined chiefly by Dan'ao River discharge. Variations in delta N-15(POM) were ascribed mostly to the input of N-15-depleted DIN assimilated by the estuarine phytoplankton in Daya Bay. Extremely high NH4+ level in the river discharge should be responsible for the low delta N-15(POM) in the river water. The distribution of delta C-13(POM) in Daya Baywas regulated mainly by the input of C-13-depleted riverine SPOM. In the present study, the influence of phytoplankton growth on the delta(13) C-POM was not significant. Moreover, episodic rain events significantly influenced the temporal and spatial variations inwater quality and isotopic signature inDaya Bay. The relatively depleted (SPOMN)-N-15 in 2016 may have been correlated with the strong El Nino events of 2015-2016. Increases in the frequency and volumeof rainfall associatedwith El Ninomay have enhanced nutrient loading and the risk of algal red tide in the Daya Bay. In general, significant N-15 depletion in SPOMcould be the characteristic of hypereutrophic riverinewaters. This study suggested that delta N-15(POM) may be an effective indicator of the strength of riverine nutrient loading in Daya Bay. (C) 2018 Elsevier B.V. All rights reserved.
关键词	Stable isotopes Hypereutrophication Estuarine ecosystem Particulate organic matter El Nino River discharge
WOS记录号	WOS:000447092700080
收录类别	SCI
引用统计
文献类型	期刊论文
条目标识符	http://ir.gig.ac.cn/handle/344008/45828
通讯作者	Tan, Yehui
作者单位	1.Chinese Acad Sci, CAS Key Lab Trop Marine Bioresources & Ecol, South China Sea Inst Oceanol, Guangzhou, Guangdong, Peoples R China 2.Guangdong Prov Key Lab Appl Marine Biol, West Xingang Rd 164, Guangzhou 510301, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Ke, Zhixin,Tan, Yehui,Huang, Liangmin,et al. Significantly depleted N-15 in suspended particulate organic matter indicating a strong influence of sewage loading in Daya Bay, China[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2019,650:759-768.
APA	Ke, Zhixin.,Tan, Yehui.,Huang, Liangmin.,Liu, Jiaxing.,Xiang, Chenhui.,...&Zhang, Jingping.(2019).Significantly depleted N-15 in suspended particulate organic matter indicating a strong influence of sewage loading in Daya Bay, China.SCIENCE OF THE TOTAL ENVIRONMENT,650,759-768.
MLA	Ke, Zhixin,et al."Significantly depleted N-15 in suspended particulate organic matter indicating a strong influence of sewage loading in Daya Bay, China".SCIENCE OF THE TOTAL ENVIRONMENT 650(2019):759-768.