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通过分析20 a来(1975—1998年)32°N断面春、秋两个季节的生态环境参数,选取特定年份对该断面各环境要素断面分布特征做了探讨,并结合各环境参数的距平图及多年气候趋势系数,初步讨论了各环境参数春季和秋季多年来的变化趋势及营养盐结构变化状况:20 a来各环境参数发生了显著变化,春季、秋季无机氮有上升趋势,溶解氧、磷酸盐和硅酸盐呈下降的趋势;氮可能成为春季东海北部海域浮游植物生长的限制因子。
By analyzing the ecological environment parameters of spring and autumn in the 32 ° N section of 20 ° (1975-1998), the distribution characteristics of the cross sections of the environmental elements in this section were studied in a specific year, and the relationship between the environmental parameters In the spring and autumn years, the changes of nutrients and the structure of nutrients were preliminarily discussed: the environmental parameters changed significantly in the past 20 years, the inorganic nitrogen in the spring and the autumn increased, the dissolved oxygen , Phosphate and silicate tended to decrease. Nitrogen may be a limiting factor for phytoplankton growth in the northern East China Sea in spring.