2014年春季和冬季渤海海水营养盐时空变化特征及富营养化评价

发布时间：2018-02-23 16:45

  本文关键词： 渤海 营养盐 评价 富营养化　出处：《渔业科学进展》2016年02期 　论文类型：期刊论文

【摘要】：根据2014年春季和冬季对渤海营养状况调查结果,分析了该水域营养盐含量的变化和分布,并对该水域营养水平状况进行了评价。结果显示,2014年春季无机氮含量水平高于冬季,NO2--N、NH4+-N平均含量分别是冬季的1.94、3.49倍,NO3--N的平均含量相差不明显,而PO43--P平均含量低于冬季,约为冬季的80%。与海水水质标准相比,冬季无机氮含量总体水平低于海水一类标准,活性磷酸盐含量略高于海水一类标准值。春季无机氮含量总体水平低于海水一类标准值,活性磷酸盐含量低于海水一类标准值。从水平分布来看,DIN含量基本呈近岸高于中部的分布趋势,而PO43--P含量呈近岸低于中部的分布趋势,受黄河口径流的影响,莱州湾DIN和PO43--P等值线较为密集。2014年冬季N/P比值略低于Redfield比值,而春季N/P比值高于Redfield比值,春季无机磷相对缺乏。根据潜在性富营养化评价模式,2014年冬季(2月)和春季(5月)渤海水域营养水平较低,均属贫营养水平。冬季有机污染指数A值为0.66,属有机污染程度Ⅰ级,水质较好,春季有机污染指数A值为1.05,属有机污染程度Ⅱ级,水质开始受到污染。
[Abstract]:Based on the results of the investigation on the nutritional status of the Bohai Sea in spring and winter of 2014, the variation and distribution of nutrient contents in the Bohai Sea were analyzed. The results showed that the average content of inorganic nitrogen in spring in 2014 was higher than that in winter, which was 1.94 ~ 3.49 times higher than that in winter, respectively, but the average content of PO43--P was lower than that in winter. Compared with the standard of seawater water quality, the total level of inorganic nitrogen in winter is lower than that of the first class of seawater, the content of active phosphate is slightly higher than that of the first class of seawater, and the total level of inorganic nitrogen in spring is lower than that of the first class of seawater. The content of active phosphate is lower than the standard value of sea water, and the content of tin is higher than that of the middle, and the content of PO43--P is lower than that of the middle, which is influenced by the runoff of the Yellow River estuary, the content of active phosphate is lower than that of the first class of seawater. The isolines of DIN and PO43--P in Laizhou Bay are denser. In 2014, the ratio of N / P is slightly lower than that of Redfield in winter, but the ratio of N / P in spring is higher than that of Redfield. According to the evaluation model of latent eutrophication, the nutrient level of Bohai Sea in 2014 winter (February) and spring (May) was low, and the organic pollution index (A) in winter was 0.66, belonging to grade 鈪，

本文编号：1526875