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。
词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。
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
均很低甚至为零，生态条件差。
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