Cedar Creek Oakland Mills
Analysis Summary for Series #1594
Benthic Macroinvertebrate Index of Biotic Integrity (BMIBI)
| Metric Name | Value | Score |
|---|---|---|
| MH Total Taxa | 27 | 5.19 |
| SH Total Taxa | 11.33 | 4.99 |
| MH EPT Taxa | 6 | 2.22 |
| SH EPT Taxa | 5.67 | 3.86 |
| MH Sensitive Taxa | 3 | 2.73 |
| SH Ephem % | 11.4 | 1.46 |
| SH EPT % | 61.05 | 6.39 |
| SH Chiron % | 22.07 | 7.87 |
| SH Scraper % | 10.97 | 2.45 |
| SH Top3Dom % | 69.99 | 4.76 |
| SH Dom FFG % | 62.46 | 6.26 |
| MHBI | 5.35 | 6.11 |
| *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 | 10/7/2013 |
| Sampling Series | Series #1594 |
| Drainage Area (mi2) | 533.179 |
| Log(DA) | 2.7268730357836 |
| Calculation Last Updated | 10/28/2025 2:41:53 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and habitat specialists are rare; EPT taxa are still dominant in abundance; however, the most-sensitive EPT taxa have been replaced by ept taxa that are more tolerant of organic enrichment; the community is not well-balanced; a few taxa clearly dominate in abundance, collector-gatherers or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 survey site. Survey sites are compared to reference sites within the same ecoregion. A reference site represents natural stream qualities that are least disturbed by human activities within the watershed. Reference sites are grouped by ecoregion to establish a benchmark against which these survey streams 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 | 43 |
| Min | 14 |
| This Session's Score | 45 |
| Total Reference Site Samples | 53 |
| Mean | 50.04 |
| Standard Deviation | 12.68 |