Shoal Creek Exline
Analysis Summary for Series #2001
Benthic Macroinvertebrate Index of Biotic Integrity (BMIBI)
| Metric Name | Value | Score |
|---|---|---|
| MH Total Taxa | 34 | 6.68 |
| SH Total Taxa | 9.33 | 4.6 |
| MH EPT Taxa | 11 | 4.62 |
| SH EPT Taxa | 6 | 4.35 |
| MH Sensitive Taxa | 2 | 1.86 |
| SH Ephem % | 37.38 | 4.78 |
| SH EPT % | 59.12 | 6.19 |
| SH Chiron % | 35.81 | 6.49 |
| SH Scraper % | 8.27 | 1.85 |
| SH Top3Dom % | 80.58 | 3.18 |
| SH Dom FFG % | 68.7 | 5.22 |
| MHBI | 6.3 | 2.59 |
| *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 | 7/21/2016 |
| Sampling Series | Series #2001 |
| Drainage Area (mi2) | 61.805 |
| Log(DA) | 1.79102361076149 |
| Calculation Last Updated | 7/22/2025 3:29:31 PM |
| Sampling Gear | ArtSub |
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and habitat specialists are rare; EPT taxa are still dominant in abundance; however, the most-sensitive EPT taxa have been replaced by ept taxa that are more tolerant of organic enrichment; the community is not well-balanced; a few taxa clearly dominate in abundance, collector-gatherers or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 | 78 |
| 75th Percentile | 58 |
| Median | 52 |
| 25th Percentile | 42 |
| Min | 14 |
| This Session's Score | 44 |
| Total Reference Site Samples | 49 |
| Mean | 49.84 |
| Standard Deviation | 13.11 |