Bias and association of sediment organic matter source apportionment   indicators: A case study in a eutrophic Lake Chaohu, China

doi:10.1016/j.scitotenv.2017.01.037

CORC > 北京大学 > 城市与环境学院

	Bias and association of sediment organic matter source apportionment indicators: A case study in a eutrophic Lake Chaohu, China
	Xu, Fu-Liu ; Yang, Chen ; He, Wei ; He, Qi-Shuang ; Li, Yi-Long ; Kang, Lei ; Liu, Wen-Xiu ; Xiong, Yong-Qiang ; Xing, Baoshan
刊名	SCIENCE OF THE TOTAL ENVIRONMENT
	2017
关键词	Sediments organic matter Source apportionment Lipid molecular biomarkers Isotope fingerprinting Lake Chaohu N-ALKANES PHYTOPLANKTON COMMUNITY SURFACE SEDIMENT ISOTOPE RATIOS FATTY-ACIDS CARBON HYDROCARBONS RIVER CORE DISTRIBUTIONS
DOI	10.1016/j.scitotenv.2017.01.037
英文摘要	The sources of sediment organic matter (SOM) could be explained by various indicators. To test their biases and associations, the present study determined multiple indicators for SOM source apportionment, including elemental analysis (carbon and nitrogen, and their stable isotope delta 13C and delta 15N), n-alkanes compositions as well as derivative indicators (e.g., terrigenous to aquatic ratio), and carbon isotopes of n-alkane in Lake Chaohu, a eutrophic lake. The spatial variation of anthropogenic effects could be revealed by SOM elemental variations. The n-alkanes of all samples had a bimodal distribution with the 1st peak at n-alkane with 17 carbons (C17) and the 2nd predominant peak at C29. The parity advantage index of n-alkanes indicated that the sediments had mixed characteristics of both endogenous and terrigenous sources. Some n-alkanes indicators also revealed eutrophication characteristics of dominant algae in Lake Chaohu. SOM received a mixed contribution of plankton (I), low-latitude terrestrial high-grade plants (II) and microbial material (III) as indicated by isotopic compositions of long-chainn-alkane. Multiport element model (MEM) showed the contribution of self-generated sources of organic matter in Lake Chaohu is >50%, indicating the historic serious eutrophication in Lake Chaohu. The main sources of SOM in the eastern part of the lake were algae and terrestrial input, with little input from microbes, and the contribution from algae decreased from west to east. The multiple indicators' judgment by MEM and principle component analysis (PCA) was of ecological significance and proposed because they offered scientific tools for disclosing the historic variations of SOM as well as their sources. (C) 2017 Elsevier B.V. All rights reserved.; National Science Foundation of China (NSFC) [41271462, 41030529]; China Postdoctoral Science Foundation [2016M600009, 2016T90010]; 111 Project [B14001]; Ministry of Education; China Scholarship Council at the University of Massachusetts, Amherst; SCI(E); ARTICLE; 874-884; 581
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/474940]
专题	城市与环境学院
推荐引用方式 GB/T 7714	Xu, Fu-Liu,Yang, Chen,He, Wei,et al. Bias and association of sediment organic matter source apportionment indicators: A case study in a eutrophic Lake Chaohu, China[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2017.
APA	Xu, Fu-Liu.,Yang, Chen.,He, Wei.,He, Qi-Shuang.,Li, Yi-Long.,...&Xing, Baoshan.(2017).Bias and association of sediment organic matter source apportionment indicators: A case study in a eutrophic Lake Chaohu, China.SCIENCE OF THE TOTAL ENVIRONMENT.
MLA	Xu, Fu-Liu,et al."Bias and association of sediment organic matter source apportionment indicators: A case study in a eutrophic Lake Chaohu, China".SCIENCE OF THE TOTAL ENVIRONMENT (2017).