North Fork Maquoketa River Hurstville
Analysis Summary for Series #1586
Benthic Macroinvertebrate Index of Biotic Integrity (BMIBI)
| Metric Name | Value | Score |
|---|---|---|
| MH Total Taxa | 43 | 8.27 |
| SH Total Taxa | 9 | 3.96 |
| MH EPT Taxa | 20 | 7.41 |
| SH EPT Taxa | 6.67 | 4.54 |
| MH Sensitive Taxa | 7 | 6.36 |
| SH Ephem % | 6.74 | 0.86 |
| SH EPT % | 58.08 | 6.08 |
| SH Chiron % | 40.38 | 6.02 |
| SH Scraper % | 0 | 0 |
| SH Top3Dom % | 87.83 | 1.93 |
| SH Dom FFG % | 56.71 | 7.22 |
| MHBI | 5.63 | 5.07 |
| *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 | 9/16/2013 |
| Sampling Series | Series #1586 |
| Drainage Area (mi2) | 589.669 |
| Log(DA) | 2.77060829670637 |
| Calculation Last Updated | 10/28/2025 3:14:37 PM |
| Sampling Gear | Float ArtSub |
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and habitat specialists are rare; EPT taxa are still dominant in abundance; however, the most-sensitive EPT taxa have been replaced by ept taxa that are more tolerant of organic enrichment; the community is not well-balanced; a few taxa clearly dominate in abundance, collector-gatherers or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 | 86 |
| 75th Percentile | 70 |
| Median | 62 |
| 25th Percentile | 54 |
| Min | 20 |
| This Session's Score | 48 |
| Total Reference Site Samples | 120 |
| Mean | 61.41 |
| Standard Deviation | 10.8 |