摘要
近岸海域水体和沉积物是营养盐迁移转化的重要场所。2016年8月对渤海湾水体和沉积物进行采样监测,分析了渤海湾水体和沉积物中不同形态氮、磷的含量,并研究了营养盐在水体和沉积物中的分布特征及其相互关系。结果表明:渤海湾水体中的营养盐在西部近岸地区含量较高,而在离海岸线较远的开阔海域含量较低,表现出一个明显的质量浓度梯度。说明人类活动对近岸海域水体中营养盐含量的贡献较为明显。水体中营养盐主要是以无机态为主,无机氮和无机磷分别占到总氮和总磷的76.65%和76.46%。沉积物中氮、磷营养盐表现出和水体中营养盐含量类似的空间分布特征,但形态主要以有机氮为主,无机磷的含量也仅占到30.42%。这说明夏季渤海湾水体中氮、磷营养盐主要由水中有机体通过同化作用将无机态营养盐合成为有机态营养盐进入沉积物,渤海湾西北海域的富营养化过程是水体中营养盐向沉积物迁移的一个主要驱动力。
Waters and sediments in coastal waters are important sites for nutrient translocation.By sampling the Bohai Sea waters and sediments in August 2016,the spatial distribution characteristics of different forms of nutrients in the waters and sediments of the Bohai Bay were analyzed.In addition,the migration and transformation of nutrients in waters and sediments were studied.The results show that nutrients in Bohai Bay waters are higher in the nearshore area of the west coast and lower in the open sea areas far from the coastline,showing a clear concentration gradient.It shows that the contribution of man-made activities to the nutrient content in the water body in coastal waters is obvious.Nutrients in waters are mainly in inorganic forms,and inorganic nitrogen and inorganic phosphorus account for 76.65%and 76.46%of the total.Nitrogen and phosphorus in sediments show similar spatial distribution of nutrients in waters.However,the main form of nitrogen is organic nitrogen,while the content of inorganic phosphorus also drops to 30.42%.This shows that the nitrogen and phosphorus in Bohai Bay waters mainly enter the sediments through the assimilation of organic compounds in waters by the organism.Part of inorganic phosphorus enter the sediments through the adsorption form,but the effect of nitrogen entering the sediments from the water body through adsorption is not obvious.
作者
宋兵魁
齐树亭
李斯
李亮
武洪庆
SONG Bing-kui;QI Shu-ting;LI Si;LI Liang;WU Hong-qing(School of Chemical Engineering,Hebei University of Technology,Tianjin300130,China;Tianjin Academy of Environmental Sciences,Tianjin300191,China)
出处
《海洋学研究》
CSCD
北大核心
2019年第1期83-90,共8页
Journal of Marine Sciences
基金
国家自然科学基金项目资助(51474084)
关键词
氮
磷
空间分布
迁移转化
渤海湾
nitrogen
phosphorus
spatial distribution
migration and transformation
Bohai Bay
