Unnamed Tributary to Volga Lake Outlet Fayette (HW#3)
Analysis Summary for Series #2013
Benthic Macroinvertebrate Index of Biotic Integrity (BMIBI)
| Metric Name | Value | Score |
|---|---|---|
| MH Total Taxa | 30 | 10 |
| SH Total Taxa | 17.33 | 10 |
| MH EPT Taxa | 14 | 10 |
| SH EPT Taxa | 8.33 | 10 |
| MH Sensitive Taxa | 9 | 10 |
| SH Ephem % | 34.04 | 4.35 |
| SH EPT % | 60.08 | 6.29 |
| SH Chiron % | 13.03 | 8.79 |
| SH Scraper % | 10.06 | 2.25 |
| SH Top3Dom % | 47.36 | 10 |
| SH Dom FFG % | 52.49 | 7.92 |
| MHBI | 3.88 | 10 |
| *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 | 9/20/2016 |
| Sampling Series | Series #2013 |
| Drainage Area (mi2) | 0.79 |
| Log(DA) | -0.102372908709559 |
| Calculation Last Updated | 7/22/2025 3:31:24 PM |
| Sampling Gear | Surb |
Sessions used in this analysis
Warm Water
Excellent
BMIBI Score Explained
This site was analyzed using the BMIBI-Warm Water assessment methodology.
Sites that score between 76 - 100 are considered excellent. High numbers of taxa present, including sensitive species, EPT taxa are diverse and dominate the community in terms of abundance; habitat and trophic specialists (e.g., Scraper organisms) are present in good numbers, all of the major functional feeding groups (FFG) are represented, with no particular FFG that is excessively dominant. The community has good balance in terms of the abundance of organisms in each taxon.
This location has been classified as a Candidate Reference Site. Further study is required to determine if this site represents natural stream qualities that are least disturbed by human activities within the watershed.
EcoRegion Comparison
Scores for a sampling session are compared against reference sites within the same ecoregion:
Paleozoic Plateau (Driftless Area)
This site is in the Paleozoic Plateau (Driftless Area) ecoregion.
| Max | 87 |
| 75th Percentile | 78 |
| Median | 70 |
| 25th Percentile | 62 |
| Min | 52 |
| This Session's Score | 83 |
| Total Reference Site Samples | 55 |
| Mean | 70.55 |
| Standard Deviation | 9.41 |