The description of five ephemera species larvae ephemeroptera : ephemeridae 五种稚虫描述
Using the calculation method of the tolerance value provided by lenat ( 1993 ), eighty-one tolerance values of macro-invertebrate taxa were acquired . among them, two genera in 2 families in coleoptera, 2 genera inl family in megaloptera, 14 genera in 7 families in ephemeroptera, 2 genera in 2 families in plecoptera, 6 genera in 5 familes in trichoptera, 1 geneus and 3 families in odonata, 12 genera and 3 sub-families in 3 families in diptera, 5 species in 2 genera in mollusca, 4 species in 1 genus in annipula and others 1 geneus 其中,依据lenat计算耐污值的方法,确定了81个分类单元的耐污值,包括鞘翅目3科2属,广翅目1科2属,蚌游目7科14属,精翅目2科2属,毛翅目6科7属,靖蜒目3科1属,t翅目3科3亚科12属,软体动物2属5种,环节动物1属4种,扁形动物1属。