Scientific Investigations Report 2006–5101–D
U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2006–5101–D
Table 13. Comparison of average benthic invertebrate abundance and richness metrics for high- and low-urban streams, Willamette River basin and surrounding area, Oregon and Washington.
[Abbreviations: UII, urban intensity index; EPEM, Ephemeroptera; PLECO, Plecoptera; EPT, Ephemeroptera, Plecoptera, and Trichoptera. Symbols: >, greater than; <, less than]
| Urban intensity index |
Total taxa richness |
EPEM abundance |
PLECO percent abundance |
EPT percent richness |
EPT richness |
Noninsect percent richness |
Intolerant abundance |
Tolerant percent abundance |
|---|---|---|---|---|---|---|---|---|
| UII < = 10 | 30 | 3,622 | 14 | 43 | 15 | 16 | 3,891 | 25 |
| UII > = 70 | 25 | 511 | 0 | 11 | 3 | 47 | 43 | 73 |
| Difference | 5 | 3,111 | 14 | 32 | 12 | -31 | 3,848 | -48 |
U.S. Department of the Interior | U.S. Geological Survey
URL: https://pubs.usgs.gov/sir/2006/5101-D
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