北黄海大型底栖动物的拖网调查研究

Survey of the Macrobenthos by Trawling in the Northern Yellow Sea

数据来源于2006年7月~2007年10月在北黄海的4个航次底拖网调查,对北黄海大型底栖动物种类组成、优势种的组成、分布及其季节变化进行研究,并分析了该海域大型底栖动物生物多样性现状。结果表明,北黄海共有大型底栖动物147种,其中软体动物种数最多有50种,占34.0%,其次是甲壳动物32种,占21.8%,鱼类28种,占19.0%。优势种组成以鱼类、软体动物和甲壳动物种类数量居多,分别为15、14和13种,其中,鱼类优势种季节更替率最大。生物多样性指数数值总体偏小,近岸水域高于深水区,个别站位季节变化较大。

A total of 147 species of macrobenthos were collected in the North Yellow Sea,including 50 Molluscs(34.0%),32 Crusteans(21.8%)and 28 fish(19.0%).Fish,mollusc and crustacean form the majority of the dominant species,including 15 species of fish,14 species of mollusc and 13 species of crustacean.The subrogation rate of fish is the highest.The biodiversity index in the North Yellow Sea is low.Biodiversity index in inshore waters is higher than that in deep waters.At a few stations the seasonal variation of biodiversity index is obvious.