由于小型底栖生物的大小、比重等物理特性与沉积物颗粒接近，如何高精度地分离样品成为一个难题。
How to separating meiofauna accurately from sediments is an unfathomed problem, because meiofauna has the similar size and density with sediment granules.
本文提出和探讨了关于开展“海底沉积物-水-底栖生物系统”调查评价的内容、方法及其工作要求。
This paper proposes and probes into the content, methods and requirements for the "submarine sediment-water-benthic organism system".
本文报道了广州市河涌沉积物及底栖生物的重金属含量及分布状况。
The main objective of the present study is to investigate the concentrations and distribution of heavy metals in sediments and benthic organisms (aquatic oligochaetes) from sewage .
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