IOCAS-IR  > 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, Shanshan1,3,5; Liang, Cui1,2,4; Xian, Weiwei1,2,4
2020-12-01
Source PublicationCONTINENTAL SHELF RESEARCH
ISSN0278-4343
Volume203Pages:12
AbstractRiverine 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.
KeywordSediment Organic matter Stable isotope Spatio-temporal distribution Seasonal variations Yangtze river estuary (YRE)
DOI10.1016/j.csr.2020.104158
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[31872568] ; Natural Science Foundation of China-Shandong Joint Fund for Marine Ecology and Environmental Science[U1606404]
WOS Research AreaOceanography
WOS SubjectOceanography
WOS IDWOS:000542270200002
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.qdio.ac.cn/handle/337002/167799
Collection海洋生态与环境科学重点实验室
Corresponding AuthorXian, Weiwei
Affiliation1.Chinese Acad Sci, Inst Oceanol, CAS Key Lab Marine Ecol & Environm Sci, Qingdao 266071, Peoples R China
2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Ecol & Environm Sci, Qingdao 266237, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Chinese Acad Sci, Ctr Ocean Megasci, Qingdao 266071, Peoples R China
5.Univ Georgia, Dept Marine Sci, Athens, GA 30602 USA
First Author AffilicationKey Laboratory of Marine Ecology & Environmental Sciences, CAS
Corresponding Author AffilicationKey Laboratory of Marine Ecology & Environmental Sciences, CAS;  Center for Ocean Mega-Science, Chinese Academy of Sciences
Recommended Citation
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.
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