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The characteristics of nutrients and eutrophication in the Pearl River estuary, South China
Huang, XP; Huang, LM; Yue, WZ
2003
Source PublicationMARINE POLLUTION BULLETIN
ISSN0025-326X
Volume47Issue:40549Pages:30-36
AbstractIn the spring of 1998, 24-h time series and synchronization of vertical profiles of NO3-N, NO2-N, NH3-N, PO4-P, chlorophyll a, suspended substance, salinity, temperature and other chemical parameters were taken at 10 stations in the Pearl River estuary in order to analyze the status and characteristics of nutrients and eutrophication. The results indicated that dissolved inorganic nitrogen (DIN) mainly came from the four river channels in the main estuary, and NO3-N was the main form of DIN in most area. The concentration of DIN was general above 0.30 mg l(-1) in the estuary, and more than 0.50 mg l(-1) in most part. Phosphate from four river channels was not the main sources, but land-based sources from the area near Shenzhen Bay or along the estuary were obvious, and other land-based sources outside the estuary brought by coastal current and flood tide current were also the main contributions. The concentration of phosphate was generally about 0.015 mg l(-1) except the area near Shenzhen Bay. The ratio of N:P was generally high, and it was higher in the north than in the south. The highest ratio was higher than 300, and the lowest one was over 30. The concentration of chlorophyll a was about 0.8-7.8 mg m(-3), and turbidity and phosphate may be the main two limiting factors for algal bloom in the estuary. The concentration of nutrients decreased slightly in the past decade, but still stayed at a high level. The nutrients mainly came from domestic sewage, industrial wastewater, agriculture fertilizer and marine culture in the Pearl River estuary. (C) 2003 Elsevier Science Ltd. All rights reserved.
DepartmentChinese Acad Sci, S China Sea Inst Oceanol, Guangzhou 510301, Peoples R China
KeywordNutrients Spatial-temporal Variation Sources Eutrophication Estuaries South China
Subject AreaEnvironmental Sciences ; Marine & Freshwater Biology
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Indexed Bysci
Funding ProjectLED
WOS IDWOS:000183700200006
Citation statistics
Document Type期刊论文
Identifierhttp://ir.scsio.ac.cn/handle/344004/5561
Collection热带海洋环境国家重点实验室(LTO)
Recommended Citation
GB/T 7714
Huang, XP,Huang, LM,Yue, WZ. The characteristics of nutrients and eutrophication in the Pearl River estuary, South China[J]. MARINE POLLUTION BULLETIN,2003,47(40549):30-36.
APA Huang, XP,Huang, LM,&Yue, WZ.(2003).The characteristics of nutrients and eutrophication in the Pearl River estuary, South China.MARINE POLLUTION BULLETIN,47(40549),30-36.
MLA Huang, XP,et al."The characteristics of nutrients and eutrophication in the Pearl River estuary, South China".MARINE POLLUTION BULLETIN 47.40549(2003):30-36.
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