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  

Distribution and potential contamination assessment of biogenic elements in surface sediments from Nan’ao mariculture areas,Shantou

作　　者：毛洁[1,2,3] 杨宇峰[1,2,3] 谷阳光[1,2,3] 陈实[1,2,3] 

机构地区：[1]暨南大学水生生物研究所,广州510632 [2]水体富营养化与赤潮防治广东省教育厅重点实验室,广州510632 [3]热带亚热带水生态工程教育部工程研究中心,广州510632

出　　处：《生态科学》2012年第3期252-258,共7页Ecological Science

基　　金：国家科技支撑计划(SQ2012BAJY307301);国家自然科学基金(41173079;41040030)

摘　　要：于2010年9月采集南澳海域鱼类养殖区、贝类养殖区、大型藻类栽培区和对照区4个功能区表层沉积物样品,分析沉积物中生物硅(BSi)、总有机碳(TOC)、总氮(TN)和总磷(TP)4种生源要素的含量。结果表明,南澳海域生源要素含量与国内外养殖区相比属于中等水平。鱼类养殖区TOC、TN、TP的含量最高,而BSi的最高含量出现在藻类栽培区(平均含量为0.30%)。鱼类养殖区BSi、TOC、TN和TP的平均含量分别为0.24%、0.89%、0.13%和0.097%。根据沉积物中TOC/TN比值分析,发现鱼类养殖区的TOC主要来源于水生,贝类、藻类和对照区TOC则主要来源于陆源。生源要素污染评价表明,4个功能区的TN均属于Ⅱ类污染,鱼类和贝类养殖区的TP属于Ⅱ类轻度污染。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.

关 键 词：沉积物 生物硅 总有机碳 总氮 总磷 养殖污染 南澳养殖区 

分 类 号：P736.4[天文地球—海洋地质]