东海典型港湾表层沉积物中主要生源要素分布及污染状况分析  

Analysis of distribution and pollution status of main biogenic elements in surface sediments of typical harbors in the East China Sea

作　　者：王文婷 王朝晖[1] 刘磊[1] 康伟[2] WANG Wen-ting;WANG Zhao-hui;LIU Lei;KANG Wei(Institution of Hydrobiology,Key Laboratory of Eutrophication and Red Tide Prevention of Guangdong Higher Education Institutes,Jinan University,Guangzhou 510632,China;East China Sea Fisheries Research Institute Chinese Academy of Fishery Sciences,Shanghai 200090,China)

机构地区：[1]暨南大学生命科学技术学院水体富营养化与赤潮防治广东普通高校重点实验室,广东广州510632 [2]中国水产科学研究院东海水产研究所,上海200090

出　　处：《海洋通报》2019年第6期690-697,共8页Marine Science Bulletin

基　　金：科技基础资源调查专项（2018FY10020001）

摘　　要：分别于2016年11月、2018年4月、2016年7月、2014年11月采集了福建东山湾、福宁湾、浙江象山港以及江苏大丰港52个表层沉积物样品,分析了表层沉积物中总有机碳(TOC)、总氮(TN)、总磷(TP)、生物硅(BSi)、有机质(OM)及含水率(MC)的含量。TOC、TN、TP、BSi、OM及MC含量分别为:0.35%~1.52%,0.08%~0.32%,0.020%~0.074%,0.28%~1.89%,1.86%~9.53%,19.55%~52.55%。福宁湾TN和BSi含量较高,东山湾TP含量较高,而象山港TOC含量较高。从元素之间的摩尔比来看,本研究中各港湾沉积物中的TOC均主要来自浮游植物等水生生物,而TOC的分解和再生速率应远高于BSi的溶解速率。根据主要生源要素污染评价标准,东山湾海域污染较严重,TN、TP、TOC均达到Ⅱ级污染标准。福宁湾及象山港TN、TOC均为域级污染。而大丰湾海域总体污染较轻,只有TN超过Ⅱ级标准。Fifty-two surface sediment samples were collected from the Dongshan Bay and the Funing Bay of Fujian,the Xiangshan Port of Zhejiang and the Dafeng Port of Jiangsu in November 2016,April 2018,July 2016 and November 2014,respectively.Biogenic elements including total organic carbon(TOC),total nitrogen(TN),total phosphate(TP),biogenic silica(BSi),organic matter(OM)and water content(MC)were analyzed.The concentrations of TOC,TN,TP,BSi,OM and MC were in the range of 0.35%~1.52%,0.08%~0.32%,0.020%~0.074%,0.28%~1.89%,1.86%~9.53%,19.55%~52.55%,respectively.Within these four sea areas,TN and BSi were higher in the Funing Bay,TP was higher in the Dongshan Bay and TOC was higher in the Xiangshan Port.TOC was mainly originated from aquatic sources such as phytoplankton based on the molar ratios of biogenic elements.And the decomposition and regeneration rates of TOC were much higher than that of BSi.According to the pollution assessment of main biogenic elements,the Dongshan Bay has been more seriously contaminated,and TN,TP,TOC all reached the Class II pollution standard.TN and TOC in the Funing Bay and the Xiangshan Port belonged to Class II pollution.The Dafeng Bay was slightly contaminated,and only TN exceeded the Class II standard.

关 键 词：生源要素 沉积物 东海 总有机碳 总氮 总磷 生物硅 

分 类 号：P736.41[天文地球—海洋地质]