Journal of Tropical Oceanography >
Distribution characteristics and pollution of nitrogen and phosphorus in core sediments of marine culture area in Dapeng Cove
Received date: 2008-12-20
Revised date: 2009-01-02
Online published: 2001-01-08
In order to study accumulation effects of marine culture on sediments, the contents and profile distribution characteristics of total nitrogen (TN), total phosphorus (TP) and total organic carbon (TOC) in core sediments from marine culture areas of Dapeng Cove in the Daya Bay were investigated. The pollution status of nitrogen and phosphorus of marine culture area were discussed. The results show that the contents of TN in cage culture, shellfish culture and control areas are in the range of 638.2-3 803.9mg.kg-1, 740.9-2 152.1mg.kg-1 and 343.2-471.9mg.kg-1, respectively; the contents of TP are in the range of 344.7-3 233.9mg.kg-1, 297.9-497.5mg.kg-1 and 650.2-1 327.2mg.kg-1, respectively; the contents of TOC are in the range of 0.96%-2.22%, 0.87%-1.13% and 0.69%–0.95%, respectively. The vertical distributions of the TN, TP and TOC contents increased from the bottom to surface layers in the study areas and the variation range in upper layers was greater than that in lower layers. The profile distributions of the contents increased most drastically in the cage culture area, followed by those in the shellfish culture area and least in the control area. The contents of TN in core sediment samples all exceeded the assessment standard, while the most serious one was in the cage cul-ture area, followed by the shellfish area and least in the control area. The contents of TP only exceeded the standard in the cage cul-ture area in the surface layer, while the contents of TP in the shellfish culture area and control area did not exceed the assessment standard.
Key words: marine culture; sediment; profile; nitrogen; phosphorus; total organic carbon; Dapeng Cove
HUANG Xiao-ping , GUO Fang , HUANG Liang-min . Distribution characteristics and pollution of nitrogen and phosphorus in core sediments of marine culture area in Dapeng Cove[J]. Journal of Tropical Oceanography, 2010 , 29(1) : 91 -97 . DOI: 10.11978/j.issn.1009-5470.2010.01.091
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