【摘要】 在渤海的22个站位 ,分3个航次采集未受扰动的沉积物样品 ,进行了小型底栖动物中两个主要类群自由生活海洋线虫和底栖桡足类数量变动和两者数量之比评价沉积物有机污染环境的研究。结果表明 :对于同一航次的不同重复 ,数量变动差异显著或极显著 ;在同一个站位24h6次重复取样 ,两者数量的变异系数较大 ;在应用该比值进行沉积物有机污染评价时 ,在同一站位该比值波动较大。更多还原

【Abstract】 A grid of22stations,giving a broad geographic coverage of the Bohai Sea and the Bohai Strait,was selected.Undisturbed sediments were collected from sampling stations during cruises in June1997,in September/October1998and in April/May1999.The abundance of the free-living marine nematodes and benthic copepods,which are two dominant groups in the meiofauna,and the ratio of nematodes to copepods were studied.The abundance of two groups from two replicates samples in1998cruise changed significantly or very significantly.The differences in the abundance of six repli-cates in the same sample sites were evident.The ratio of nematodes to copepods in the same sample sites in two cruises fluctuated when using it as organic pollution indicator.更多还原