摘要
根据2014~2015年江苏近岸海域4个航次现场调查资料,分析探讨了该海区表层海水的溶解无机氮(DIN)、活性磷酸盐和硅酸盐含量及分布特征,并对江苏近岸海域表层水质进行富营养化评价。海区全年表层DIN平均浓度均符合国家4类海水水质标准,表层活性磷酸盐平均浓度均符合国家二类海水水质标准。DIN表现为冬季>夏季>秋季>春季。NO_3-N在4个季节均为DIN的主要存在形态,NO_2-N的比例随水温的升高而呈上升趋势。灌河口和江苏海域南端启东嘴处为营养盐高值区,而海州湾是营养盐低值区。江苏近岸海域在夏季基本处于磷限制潜在性富营养。而秋季北部海域基本处于磷限制潜在性富营养,南部海域处于中度营养及富营养状态;冬季海州湾基本处于磷限制潜在性富营养,其余海域处于中度营养及富营养状态,春季海区整体呈现中度营养及富营养状态。
Based on the data of four voyages across the coastal waters of Jiangsu Province from2014 to 2015, the content and distribution characteristics of dissolved inorganic nitrogen （DIN）, active phosphate and silicate in surface seawater of the sea area were analyzed. There was an eutrophication evaluation for water quality. The average concentration of DIN in the whole area met the Ⅳ class national standard of seawater, and the average concentration of surface active phosphate met the Ⅱ class water quality standard. DIN showed a higher concentration in winter than in summer, fall and spring. Nitrate was the main form of DIN in four seasons, and the proportion of nitrite increased with water temperature. There were high-value nutrient areas at GuanheEstuary and the southern tip of Jiangsu Province, and a low value area in Haizhou Bay. It was basically the phosphorus limit potential eutrophication at Jiangsu coastal waters in summer. In fall, the northern part of the northern waters basically limited to the potential of eutrophication while the southern waters in a moderate nutrition and eutrophic status. Haizhou Bay was basically in the phosphorus limit potential eutrophication in winterwhile the rest of the waters in a moderate nutrition and eutrophication. The whole water showed a moderate nutrition and eutrophication status in spring.
作者
张艾芹
江辉煌
顾正平
陈沛沛
ZHANG Aiqin;JIANG Huihuang;GU Zhengping;CHEN Peipei(Nantong Marine Environmental Monitoring Center of SOA, Nantong, Jiangsu 226005, China;Key Laboratory of Integrated Monitoring and Applied Technology for Marine Harmful Algal Blooms of SOA, Shanghai, 200062, China)
出处
《海洋湖沼通报》
CSCD
北大核心
2018年第2期49-59,共11页
Transactions of Oceanology and Limnology
基金
国家海洋局东海分局开放基金(MATHAB20120211)资助
关键词
江苏
溶解无机氮
营养盐
硅酸盐
营养级
Jiangsu
dissolved inorganic nitrogen
nutrient
silicate
trophic level
