Criteria are for family-level identification of all taxa. The 5-metric B-IBI will not give you as much qualitative information as a 10-metric B-IBI, but it will provide you with a relative integrity score. Researchers continue to evaluate the effectiveness of the 5 metric B-IBI. 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 |
2 |
3 |
4 |
5 |
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Total number of taxa |
[0, 7] |
(7, 13] |
(13, 19] |
(19, 25] |
>25 |
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Number of Ephemeroptera taxa |
[0, 1] |
(1, 2] |
(2, 4] |
(4, 6] |
>6 |
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Number of Plecoptera taxa |
0 |
(0, 1] |
(1, 2] |
(2, 3] |
>3 |
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Number of Tricoptera taxa |
0 |
(0, 2] |
(2, 4] |
(4, 6] |
>6 |
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% dominance (1 taxon)* |
>85 |
[70, 85] |
[55, 70) |
[40, 55) |
<40 |
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