连云港港区海洋环境质量状况

为分析连云港海洋环境质量,对连云港港区水质、沉积物及生物因子进行监测。结果表明,港区内某些点位水质中无机氮含量较高,达到污染程度,其余点位监测指标均正常,沉积物中的重金属尚未对该海域造成污染。浮游植物31种,其中甲藻门8种,硅藻门23种,浮游植物数量变动为1.84×104m-3~1.16×105m-3;底栖生物17种,多样性指数平均值为1.89。港区内水域环境时空变化表明,海水中锌含量连续大幅增加,其余指标均下降50%,沉积物重金属含量变化不大。

M arine EnvironmentQuality ofLianyungangHarbor Districts

The water quality,sediment and biological factors were monitored to analyze marine environment quality of Lianyungang harbor district.The results showed that high level of inorganic nitrogen in some sampling sites indicated water pollution,and the other monitoring indexes were in normal condition.Heavy metals in sediments had not yet caused sea water pollution.Phytoplankton was observed including 8 species of pyrroptata,23 species of bacillariophyta and biomass 1.84×10^4 m^-3～1.16×10^5 m^-3;17 species of benthos had been recognized.Average of diversity index average equaled to 1.89.Environment Spatio-temporal changes of Lianyungang Harbor showed that seawater zinc content continuously increased;the rest indexes decreased 50%,and concentrations of heavy metals in sediment changed a little.