摘要
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。
The benthic macrofauna were quantitatively investigated in the first cruise in the submarine delta of Huanghe River estuary and its adjacent waters at 27 stations during the dry season, May-June, 1985. A total of 150 species were identified from 2730 individuals.The Echinoderms were the most important group, comprising 47.2% of the total macrofaunal biomuss; the Molluscs were the most abundant group, constituting 42.7% of overall abundance. While the biomass and abundance of the polychaetes ranked the third, comprising 7.5% and 21.9% respectively, among all macro faunal groups the species richness of the polychaetes reached maximum value, with total of 93 species constituting 62 % 癴 t皌al number of macrofaunal species.The Laizhou Bay showed the very high value of biomass, with 3. 5 times the average biomass of the study area and 5. 5 times the average value of Bohai Sea, and seemed to be due to the input of the nutrient and detritus from estuary, mixture with seawater during the transportation and deposition at the northern part of the Laizhou Bay.
基金
国家科学基金(基金号:3860804)
青岛海洋大学科研处的联合资助
关键词
底栖动物
生物量
密度
黄河口
Huanghe estuary
macrofauna
biomass
densiry
