Distribution contamination of biogenic elements in surface sediments from typical sea areas of Beibu Gulf Rim in China
LIANG Cai-ying, WANG Zhao-hui, GUO Xin, LIU Lei
College of Life Science and Technology, Key Laboratory of Eutrophication and Red Tide Prevention of Guangdong Higher Education Institutes, Jinan University, Guangzhou 510632, China
Abstract：Forty-eight surface sediment samples were collected from typical sea areas of Beibu Gulf Rim between April 2015 and May 2016. Biogenic elements including total organic carbon (TOC), total nitrogen (TN), total phosphate (TP) and biogenic silica (BSi) were analyzed. The concentrations of TOC, TN, TP and BSi were in the range of 0.27%~1.64%, 0.09%~0.25%, 0.02%~0.05% and 0.55%~2.28%, respectively. Biogenic elements were higher in Zhanjiang port, and followed by Beihai port. Concentrations of TOC, TN, and TP were comparable in four ports of Hainan coast, however BSi levels were significantly higher in Haikou port and Xinhai port in the northern coast than those in Yangpu port and Basuo port in the mid-western coast. The significant coefficients among biogenic elements indicated their similar origin. TOC mainly originated from marine phytoplankton especially from diatoms based on the molar ratios of TOC/TN. Contamination assessment of biogenic elements indicated TN was contaminated in all ports, and TOC in Zhanjing port, Beihai port and Baosuo port has been polluted as well.
LIANG Cai-ying,WANG Zhao-hui,GUO Xin et al. Distribution contamination of biogenic elements in surface sediments from typical sea areas of Beibu Gulf Rim in China[J]. Marine Environmental Science, 2017, 36(5): 648-654.
LIU S M,YE X W,ZHANG J,et al.Problems with biogenic silica measurement in marginal seas[J].Marine Geology,2002,192(4):383-392.
[11]
YANG B,CAO L,LIU S M,et al.Biogeochemistry of bulk organic matter and biogenic elements in surface sediments of the Yangtze River Estuary and adjacent sea[J].Marine Pollution Bulletin,2015,96(1/2):471-484.
WANG Z H,FENG J,JIANG T,et al.Assessment of metal contamination in surface sediments from Zhelin Bay,the South China Sea[J].Marine Pollution Bulletin,2013,76(1/2):383-388.
MEYERS P A,ISHIWATARI R.Lacustrine organic geochemistry—an overview of indicators of organic matter sources and diagenesis in lake sediments[J].Organic Geochemistry,1993,20(7):867-900.
[19]
HYLAND J,BALTHIS L,KARAKASSIS I,et al.Organic carbon content of sediments as an indicator of stress in the marine benthos[J].Marine Ecology Progress Series,2005,295:91-103.
