Little Volga River Maynard (HW43)
Analysis Summary for Series #2006
Benthic Macroinvertebrate Index of Biotic Integrity (BMIBI)
| Metric Name | Value | Score |
|---|---|---|
| MH Total Taxa | 25 | 9.25 |
| SH Total Taxa | 5.33 | 5.18 |
| MH EPT Taxa | 3 | 2.33 |
| SH EPT Taxa | 1.67 | 2.45 |
| MH Sensitive Taxa | 2 | 3.55 |
| SH Ephem % | 0.31 | 0.04 |
| SH EPT % | 6.83 | 0.72 |
| SH Chiron % | 58.78 | 4.16 |
| SH Scraper % | 1.64 | 0.37 |
| SH Top3Dom % | 91.9 | 3.03 |
| SH Dom FFG % | 61.33 | 6.44 |
| MHBI | 5.87 | 4.19 |
| *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 | 7/19/2016 |
| Sampling Series | Series #2006 |
| Drainage Area (mi2) | 4.929 |
| Log(DA) | 0.692758818154724 |
| Calculation Last Updated | 7/22/2025 3:30:39 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and habitat specialists are rare; EPT taxa are still dominant in abundance; however, the most-sensitive EPT taxa have been replaced by ept taxa that are more tolerant of organic enrichment; the community is not well-balanced; a few taxa clearly dominate in abundance, collector-gatherers or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 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:
| Max | 91 |
| 75th Percentile | 75 |
| Median | 66 |
| 25th Percentile | 57 |
| Min | 23 |
| This Session's Score | 35 |
| Total Reference Site Samples | 164 |
| Mean | 65.12 |
| Standard Deviation | 12.32 |