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1985年5-6月对黄河口及其邻近海域的27个站进行了大型底栖动物的首航定量调查。调查海域平均生物量为35.28g/m~2,平均密度为557inds/m~2。棘皮动物占总生物量的47.2％,软体动物占34.2％,多毛类和甲壳类分别占7.5％和6.2％。莱州湾的生物量为调查海域平均生物量的3.5倍。河口输入的营养盐在与高密度低营养盐海水混合过程中,逐渐下沉在莱州湾北部,这是控制该海域高生产力的主要因素。
From May to June 1985, the first large-scale zoobenthos quantitative survey of 27 stations in the Yellow River Mouth and its adjacent waters was conducted. The average biomass in the surveyed sea area was 35.28g / m ~ 2 and the average density was 557inds / m ~ 2. Echinoderms accounted for 47.2% of the total biomass, molluscs 34.2%, polychaetes and crustaceans accounted for 7.5% and 6.2%. The biomass in Laizhou Bay is 3.5 times of the average biomass in the surveyed sea area. During the mixing process with high-density and low-nutrient seawater, nutrient input at the estuary gradually subsided in the northern part of Laizhou Bay, which is the main factor controlling the high productivity in this area.