Criteria are for genus-level identification of most insects and chironomids to family. Square braces indicate the value next to the brace is included in the range; rounded parentheses indicate the value is not included.
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Scoring Criteria |
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Metric |
1 |
3 |
5 |
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Taxa richness and composition |
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Total number of taxa |
[0, 10) |
[10, 20) |
> 20 |
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Number of Ephemeroptera (mayfly) taxa |
[0, 3) |
[3, 5.5) |
> 5.5 |
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Number of Plecoptera (stonefly) taxa |
[0, 3) |
[3, 5.5) |
> 5.5 |
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Number of Trichoptera (caddisfly) taxa |
[0, 2) |
[2, 4.5) |
>4.5 |
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Number of long-lived taxa |
[0, 0.5) |
[0.5, 2) |
> 2 |
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Tolerance |
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Number of intolerant taxa |
[0, 0.5) |
[0.5, 2) |
> 2 |
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% of individuals in tolerant taxa |
> 50 |
[50, 20) |
< 20 |
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Feeding ecology |
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% of predator individuals |
[0, 5) |
[5, 10) |
> 10 |
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Number of clinger taxa |
[0, 8) |
[8, 15) |
> 15 |
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Population attributes |
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% dominance (top 3 taxa) |
> 75 |
[75, 50) |
< 50 |