By sampling for three times in a year,collecting 21 kinds of large-scale benthosaltogether which belong to 15 family,9 order,5 class 4 phylum.

• 通过全年3次调查采样,在黄河三角洲调查区,共采到大型底栖无脊椎动物21种,分别隶属于4门5纲9目15科。