汕头南澳养殖区表层沉积物中生源要素的分布及其污染评价

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Abstract

The concentrations of biogenic elements including biogenic silica(BSi),total organic carbon(TOC),total nitrogen(TN) and total phosphorus(TP) were determined in surface sediments collected from marine fish cage culture zones,shellfish culture zones,Gracilaria cultivation zones and nature zones of Nan'ao,Shantou in September,2010.Results showed that concentrations of biogenic elements were within moderate levels compared with those from other mariculture areas in the world.Contents of TOC,TN,TP in the fish culture zones were the highest;while the highest contents of BSi in Gracilaria culture zones(the average contents of BSi was 0.30%) in the all survey zones.The average contents of BSi,TOC,TN,and TP were 0.24%,0.89%,0.13% and 0.097% in marine fish cage culture zone,respectively.According the results of TOC/TN ratios,resources of TOC in the fish culture zones were from water bodies,from land in the other zones.Contamination assessment of biogenic elements indicated that TN in the four zones were in the Class Ⅱ pollution,TP in the Class Ⅱ pollution in the fish culture zone and shellfish culture zone.

Key words： sediments biogenic silica total organic carbon total nitrogen total phosphorus mariculture pollution Nan’ao mariculture areas

Received: 25 June 2012

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	MAO Jie
	GU Yang-guang

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MAO Jie,GU Yang-guang. Distribution and potential contamination assessment of biogenic elements in surface sediments from Nan’ao mariculture areas,Shantou[J]. , 2012, 31(3): 252-258.

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http://www.ecolsci.com/EN/ OR http://www.ecolsci.com/EN/Y2012/V31/I3/252

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