Different controls on sedimentary organic carbon in the Bohai Sea: River mouth relocation, turbidity and eutrophication

doi:10.1016/j.jmarsys.2017.12.004

	Different controls on sedimentary organic carbon in the Bohai Sea: River mouth relocation, turbidity and eutrophication
	Xu, Yunping 1; Zhou, Shangzhe 2; Hu, Limin 3,4; Wang, Yinghui 2; Xiao, Wenjie 2
刊名	JOURNAL OF MARINE SYSTEMS
	2018-04
卷号	180 页码:1-8
关键词	Yellow River Bohai Sea Biomarker Organic carbon Eutrophication River mouth relocation
ISSN号	0924-7963
DOI	10.1016/j.jmarsys.2017.12.004
英文摘要	The extractable lipids and bulk organic geochemical parameters in three sediment cores (M-1, M-3 and M-7) from southern, central and northern Bohai Sea were analyzed in order to reconstruct environmental changes since 1900. The C/N ratio and multiple biomarkers (e.g., C-27 + C-29 + C-31 n-alkanes, C-24 + C-26 + C-28 n-alkanols, branched versus isoprenoid tetraether index) suggest more terrigenous organic carbon (OC) inputs in southern Bohai Sea. The abrupt changes of biomarker indicators in core M-1 are generally synchronous with the Yellow River mouth relocation events (e.g., 1964, 1976 and 1996), suggesting the distance to the river mouth being an important factor for sedimentary OC dispersal in the southern Bohai Sea. However, in cores M-3 and M-7, terrigenous biomarkers (i.e., BIT) show a long-term declining trend, consistent with a continuous reduction of the Yellow River sediment load, whereas marine biomarkers such as cholesterol, brassicasterol and dinosterol dramatically increased post-1980, apparently related to human-induced eutrophication in the Bohai Sea. Our study suggests different controlling factors on sedimentary OC distribution in the southern (high turbidity) and other parts (less turbidity) of the Bohai Sea, which should be considered for interpretation of paleoenvironments and biogeochemical processes in the river dominated margins that are hotspots of the global carbon cycling.
资助项目	National Natural Science Foundation of China[NSFC 41476062] ; National Natural Science Foundation of China[41676058]
WOS关键词	HUANGHE YELLOW-RIVER ; TETRAETHER LIPIDS ; CHANNEL SHIFTS ; ENVIRONMENTAL-CHANGE ; COMMUNITY STRUCTURE ; GEOCHEMICAL RECORD ; BIT INDEX ; MATTER ; CHINA ; HOLOCENE
WOS研究方向	Geology ; Marine & Freshwater Biology ; Oceanography
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000429514700001
内容类型	期刊论文
源URL	[http://ir.fio.com.cn:8080/handle/2SI8HI0U/25510]
专题	自然资源部第一海洋研究所
通讯作者	Xu, Yunping
作者单位	1.Shanghai Ocean Univ, Coll Marine Sci, Shanghai Engn Res Ctr Hadal Sci & Technol, Shanghai 201306, Peoples R China 2.Peking Univ, Coll Urban & Environm Sci, MOE Key Lab Earth Surface Proc, Beijing 100871, Peoples R China 3.State Ocean Adm, Inst Oceanog 1, Key Lab Marine Sedimentol & Environm Geol, Qingdao 266061, Peoples R China 4.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao 266061, Peoples R China
推荐引用方式 GB/T 7714	Xu, Yunping,Zhou, Shangzhe,Hu, Limin,et al. Different controls on sedimentary organic carbon in the Bohai Sea: River mouth relocation, turbidity and eutrophication[J]. JOURNAL OF MARINE SYSTEMS,2018,180:1-8.
APA	Xu, Yunping,Zhou, Shangzhe,Hu, Limin,Wang, Yinghui,&Xiao, Wenjie.(2018).Different controls on sedimentary organic carbon in the Bohai Sea: River mouth relocation, turbidity and eutrophication.JOURNAL OF MARINE SYSTEMS,180,1-8.
MLA	Xu, Yunping,et al."Different controls on sedimentary organic carbon in the Bohai Sea: River mouth relocation, turbidity and eutrophication".JOURNAL OF MARINE SYSTEMS 180(2018):1-8.