庙岛群岛南部海域海水营养盐特征和富营养化评价  

Characteristics of Nutrients and Eutrophication Assessment in the Southern Waters of Miaodao Archipelago

作　　者：徐艳东[1,2] 魏潇 吴兴伟 冯银银 朱金龙 杜逢超 

机构地区：[1]山东省海洋资源与环境研究院山东省海洋生态修复重点实验室,烟台264006 [2]中国海洋大学环境科学与工程学院,青岛266100

出　　处：《科学技术与工程》2015年第22期214-219,共6页Science Technology and Engineering

基　　金：国家海洋公益性行业专项经费(201105006;201205001);山东省科技发展计划(2014GSF117030)资助

摘　　要：根据庙岛群岛南部海域2014年4月氮磷营养盐、溶解氧和化学需氧量等水质要素的调查资料,研究了该海域营养盐含量和结构特征,运用单因子指数、富营养化指数和灰色聚类分析等方法评价了该海域海水富营养化状况。结果表明,调查海域的活性磷酸盐、无机氮的平均含量分别为4.43μg/L、195.42μg/L;硝酸盐氮是无机氮的主要存在形式,氮磷比平均为105.1,氮磷比失衡状况较严重,磷限制为该海域的营养盐结构的主要特征;95%站位的富营养化指数小于1,灰色聚类分析结果表明贫营养级(Ⅰ级)、中度营养级(Ⅱ级)和富营养级(Ⅲ级)的站位比例分别为15%、75%和10%,其中Ⅱ级中的部分站位具有较大潜在富营养化风险。因此应加强富营养化区域的监测,特别关注营养盐严重失衡区域。On basis of the field data of water quality elements of the southern waters of Miaodao Archipelago in April of 2014, including nitrogen-phosphorus nutrients, dissolved oxygen and chemical oxygen demand, nutrients characteristics in concentration and structure were studied, and the eutrophication degree of the southern waters was assessed by single factor index, eutrophication index and grey clustering analysis.The results showed that average concentrations of PO4-P and DIN were 4.43 μg/L and 195.42 μg/L, respectively.NO3-N was the chief form of DIN, and the average rate of nitrogen and phosphorus was 105.1, which demonstrated the serious unbalance in N/P and phosphorus-limit as the main characteristic of nutrients structure in the southern waters.Eutrophication in-dices of 95%of the monitoring stations were bigger than 1.The result of grey clustering analysis showed that pro-portions of oligotrophic , mid-eutrophic and eutrophic stations were 15%, 75% and 10% respectively, and some mid-eutrophic stations had comparatively high potential risk of eutrophication.Given all that, measures should be taken on close monitoring on eutrophic areas in the Southern waters of the Miaodao Archipelago, and spe-cial attentions should be paid to the areas with severe unbalance in nutrients structure.

关 键 词：营养盐 富营养化 灰色聚类分析 庙岛群岛 

分 类 号：X824[环境科学与工程—环境工程]