Coral trace metal of natural and anthropogenic influences in the northern South China Sea

Jiang, Wei, Yu, Ke-Fu, Song, Yin-Xian, Zhao, Jian-Xin, Feng, Yue-Xing, Wang, Ying-Hui and Xu, Shen-Dong (2017) Coral trace metal of natural and anthropogenic influences in the northern South China Sea. Science of the Total Environment, 607-608 195-203. doi:10.1016/j.scitotenv.2017.06.105

Author Jiang, Wei
Yu, Ke-Fu
Song, Yin-Xian
Zhao, Jian-Xin
Feng, Yue-Xing
Wang, Ying-Hui
Xu, Shen-Dong
Title Coral trace metal of natural and anthropogenic influences in the northern South China Sea
Journal name Science of the Total Environment   Check publisher's open access policy
ISSN 1879-1026
Publication date 2017-12-31
Sub-type Article (original research)
DOI 10.1016/j.scitotenv.2017.06.105
Open Access Status Not yet assessed
Volume 607-608
Start page 195
End page 203
Total pages 9
Place of publication Amsterdam, Netherlands
Publisher Elsevier BV
Language eng
Subject 2305 Environmental Engineering
2304 Environmental Chemistry
2311 Waste Management and Disposal
2310 Pollution
Abstract The composition and concentrations of trace metals in coastal seawater have changed in parallel with variations in geochemical processes, climate and anthropogenic activities. To evaluate the response of trace metals in coastal seawater to climatic changes and human disturbances, we report annual-resolution trace element data for a Porites coral core covering ~ 100 years of continuous growth from a fringing reef in Xiaodonghai Bay in the northern South China Sea. The results suggested that the trace metal contents in the coral skeleton demonstrated decadal to interdecadal fluctuations with several large or small peaks in certain years with remarkable environmental significances. All of the trace metals in coastal surface seawater, especially Cr and Pb (related to industrial or traffic emissions), were impacted by terrestrial inputs, except for Sr and U, which were impacted by the surface seawater temperature (SST). Moreover, Mn, Ni, Fe and Co were also contributed by weapons and military supplies during wars, and Cu, Cd and Zn were further impacted by upwelling associated with their biogeochemical cycles. Ba and rare earth element (REE) in coastal surface seawater were dominated by runoff and groundwater discharge associated with precipitation. This study provided the potential for some trace metals (e.g., REE, Ba, Cu, Cd, and Zn) in coral skeletons to be used as proxies of natural (e.g., upwelling and precipitation) and anthropogenic (e.g., war and coastal construction) variability of seawater chemistry to enable the reconstruction of environmental and climatic changes through time.
Keyword Anthropogenic activity
Rare earth element
Trace metal
Q-Index Code C1
Q-Index Status Provisional Code
Grant ID 2016GXNSFBA380113
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
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