Benthic meiobenthos is one of the most important community to biomedical research.

深小型底栖生物具有重要生物医学研究价值。

In the stream with strong bed load movement there is no benthic macroinvertebrate.

河势散乱且河床运动剧烈的支流物种丰度和密度均很低甚至为零，生态条件差。

Closely associated with the benthic community are organisms collectively called periphyton or aufwuchs.

但是当水变浅时，生物相会改变。