Table 4 Core metrics and calculation formulas.

From: Health assessment of important tributaries of Three Georges Reservoir based on the benthic index of biotic integrity

Biological metric

Computational formula

Total taxa

Total taxa/32

EPT taxa

EPT taxa/16

Diptera taxa

Diptera taxa/7.30

Ephemerida%

Ephemerida%/0.68

Trichoptera%

Trichoptera%/0.41

Shannon diversity index

Shannon diversity index/3.69

Dominant species%

(1-dominant species%)/0.80

Filters%

(1-filter%)/1.00

Back to article page