Willow Creek Quimby
Analysis Summary for Series #1544
Benthic Macroinvertebrate Index of Biotic Integrity (BMIBI)
| Metric Name | Value | Score |
|---|---|---|
| MH Total Taxa | 28 | 6.26 |
| SH Total Taxa | 7 | 3.95 |
| MH EPT Taxa | 14 | 6.67 |
| SH EPT Taxa | 5 | 4.16 |
| MH Sensitive Taxa | 6 | 6.36 |
| SH Ephem % | 33.39 | 4.27 |
| SH EPT % | 64.32 | 6.74 |
| SH Chiron % | 30.12 | 7.06 |
| SH Scraper % | 0.32 | 0.07 |
| SH Top3Dom % | 69.94 | 5.75 |
| SH Dom FFG % | 62.54 | 6.24 |
| MHBI | 5.57 | 5.3 |
| *Mouse-over metric for full name | ||
| **Final IBI is sum of scores multiplied by 0.8333 | ||
Analysis Factors
| Factor | Value |
|---|---|
| BMIBI Type | Warm Water |
| Sample Date | 8/20/2013 |
| Sampling Series | Series #1544 |
| Drainage Area (mi2) | 32.307 |
| Log(DA) | 1.50929663168103 |
| Calculation Last Updated | 7/22/2025 3:36:33 PM |
| Sampling Gear | Hess |
Sessions used in this analysis
Warm Water
Fair
BMIBI Score Explained
This site was analyzed using the BMIBI-Warm Water assessment methodology.
Sites that score between 31 - 55 are considered fair. Total taxa richness and EPT (Ephemeroptera, Plecoptera, Trichoptera) taxa richness are noticeably reduced from optimum levels; sensitive species and habitat specialists are rare; EPT taxa are still dominant in abundance; however, the most-sensitive EPT taxa have been replaced by ept taxa that are more tolerant of organic enrichment; the community is not well-balanced; a few taxa clearly dominate in abundance, collector-gatherers or collector-filterers often comprise more than 50% of the community.
This location has been classified as a Reference Site. Reference sites represent natural stream qualities that are least disturbed by human activities within the watershed. These sites are then grouped by ecoregion to establish a benchmark against which other streams in the same ecoregion are compared.
EcoRegion Comparison
Scores for a sampling session are compared against reference sites within the same ecoregion:
| Max | 88 |
| 75th Percentile | 58 |
| Median | 51 |
| 25th Percentile | 45 |
| Min | 10 |
| This Session's Score | 52 |
| Total Reference Site Samples | 45 |
| Mean | 50.91 |
| Standard Deviation | 13.26 |