Spatial and temporal distributions of terrestrial and marine organic matter in the surface sediments of the Yangtze River estuary

doi:10.1016/j.csr.2020.104158

CORC > 海洋研究所 > 中国科学院海洋研究所 > 海洋生态与环境科学重点实验室

	Spatial and temporal distributions of terrestrial and marine organic matter in the surface sediments of the Yangtze River estuary
	Zhang, Shanshan 1,3,4; Liang, Cui 1,2,5; Xian, Weiwei 1,2,5
刊名	CONTINENTAL SHELF RESEARCH
	2020-12-01
卷号	203 页码:12
关键词	Sediment Organic matter Stable isotope Spatio-temporal distribution Seasonal variations Yangtze river estuary (YRE)
ISSN号	0278-4343
DOI	10.1016/j.csr.2020.104158
英文摘要	Riverine supply of largely terrestrial carbon is important to the carbon cycle chemistry of the oceans. Along a river-ocean continuum, sedimentary organic matter composition and distribution can provide insights to the balance of terrestrial input and in situ production of an estuary. In the Yangtze River estuary (YRE), this balance is especially important to understand as human impacts and climate change continue to modify processes along the continuum. Here we discuss the sources and spatio-temporal distributions of organic matter in the coastal ocean surface sediments and how environmental factors have affected changes there. The isotopic compositions (delta C-13 and delta N-15), total organic carbon (TOC), and total nitrogen (TN) of surface sediments were investigated along with sediment grain size and bottom water temperature, salinity, and total suspended matter. Evidence suggests that fine sedimentary grain size, bottom water temperature, and the circulation dynamics of water masses such as Changjiang Diluted Water (CDW) and Taiwan Warm Current (TWC) were the main factors affecting spatial and temporal distributions, with organic matter concentrations in autumn showing higher than that in spring and nearshore areas higher than offshore. An isotopic-based two end-member mixing model suggests that terrigenous inputs were the main source (about 53%) of organic matter in the YRE, followed by autochthonous marine organic matter, in both seasons. Terrestrial organic matter distribution, controlled by the CDW, decreased seaward from the mouth, as expected, and the proportion of terrestrial organic carbon increased in autumn compared to spring. Intrusions of the TWC water likely contributed to the increase of marine components in a tongue-shaped area during both seasons.
资助项目	National Natural Science Foundation of China[31872568] ; Natural Science Foundation of China-Shandong Joint Fund for Marine Ecology and Environmental Science[U1606404]
WOS研究方向	Oceanography
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000542270200002
内容类型	期刊论文
版本	出版稿
源URL	[http://ir.qdio.ac.cn/handle/337002/167798]
专题	海洋研究所_海洋生态与环境科学重点实验室
通讯作者	Xian, Weiwei
作者单位	1.Chinese Acad Sci, Inst Oceanol, CAS Key Lab Marine Ecol & Environm Sci, Qingdao 266071, Peoples R China 2.Chinese Acad Sci, Ctr Ocean Megasci, Qingdao 266071, Peoples R China 3.Univ Georgia, Dept Marine Sci, Athens, GA 30602 USA 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 5.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Ecol & Environm Sci, Qingdao 266237, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Shanshan,Liang, Cui,Xian, Weiwei. Spatial and temporal distributions of terrestrial and marine organic matter in the surface sediments of the Yangtze River estuary[J]. CONTINENTAL SHELF RESEARCH,2020,203:12.
APA	Zhang, Shanshan,Liang, Cui,&Xian, Weiwei.(2020).Spatial and temporal distributions of terrestrial and marine organic matter in the surface sediments of the Yangtze River estuary.CONTINENTAL SHELF RESEARCH,203,12.
MLA	Zhang, Shanshan,et al."Spatial and temporal distributions of terrestrial and marine organic matter in the surface sediments of the Yangtze River estuary".CONTINENTAL SHELF RESEARCH 203(2020):12.