In lentic water, the significant difference was existed in the number of species ( z=-.0 , p<0.0), but it showed no significant difference in individuals between quantitative and semi-quantitative (D-frame net) samples.
In lentic water, the significant difference was existed in the number of species ( z=-.0 , p<0.0), but it showed no significant difference in individuals between quantitative and semi-quantitative (D-frame net) samples.
静水-缓流栖境中，半定量样本(D形抄网样)的个体数和种类数一般也高于定量样本，且种类数有显著差异(z=-.0 ，p＜0.0)。