摘要
根据2009年5、8、10月胶州湾海区3个航次海水营养盐的调查资料,分析了该海区海水营养盐的分布特征和时空变化,利用潜在富营养化评价模式评价水质营养状况。结果表明,溶解无机氮、活性磷酸盐以及活性硅酸盐的年均含量分别为0.335、0.028和0.725 mg/L,NO3-N是DIN的主要组成部分,占溶解无机氮含量的71.6%;8月营养盐含量高于5月和10月,营养盐的空间分布从东部河口区和北部养殖区两个高含量区向湾中心和湾口呈逐步递减之势;DIN∶P,Si∶DIN和Si∶P的比值年平均分别为53.9,2.03和57.7,活性磷酸盐为限制因素,胶州湾海域处于磷中等限制-磷限制潜在性富营养化,楼山河口和李村河口为中度营养-富营养,一旦有外界磷大量输入可能发生赤潮。
Based on 3 cruises of observed nutrient data in the Jiaozhou Bay in May,August,and October of 2009,the distribution characteristics and variabilities of nutrients in seawater of the sea area are analyzed,and the potential eutrophication conditions of water quality are assessed.It is showed from the analysis results that the annual mean concentration of dissolved inorganic nitrogen（DIN）,active phosphate and active silicate were 0.335,0.028,and 0.725 mg/L.The concentration of nutrient in August was higher than that in May and October.The spatial distribution of nutrients appeared a downward trend from two high concentration areas including eastern estuary and northern breeding area to low concentration areas including bay center and the mouth.The annual mean rations of DIN∶ P,Si∶ DIN and Si∶ P were 53.9,2.03,and 57.7,respectively,and phosphate was the limiting factor,the whole water was in the middle-phosphorus-limiting to phosphorus-limiting potential eutrophication,Loushan Estuary and Licun Estuary were in moderate eutrophication to rich eutrophication,the massive importation of phosphorus outside may occur red tide.
出处
《海洋湖沼通报》
CSCD
北大核心
2010年第3期149-156,共8页
Transactions of Oceanology and Limnology
关键词
胶州湾
营养盐
潜在性富营养化
Jiaozhou Bay
nutrient
potential eutrophication
