Old Mans Creek Ladora
Analysis Summary for Series #1622
Benthic Macroinvertebrate Index of Biotic Integrity (BMIBI)
| Metric Name | Value | Score |
|---|---|---|
| MH Total Taxa | 18 | 5.71 |
| SH Total Taxa | 5.33 | 4.38 |
| MH EPT Taxa | 0 | 0 |
| SH EPT Taxa | 0.67 | 0.82 |
| MH Sensitive Taxa | 0 | 0 |
| SH Ephem % | 0 | 0 |
| SH EPT % | 3.24 | 0.34 |
| SH Chiron % | 53.35 | 4.71 |
| SH Scraper % | 0.67 | 0.15 |
| SH Top3Dom % | 95.43 | 1.38 |
| SH Dom FFG % | 93.98 | 1 |
| MHBI | 6.79 | 0.78 |
| *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 | 10/2/2013 |
| Sampling Series | Series #1622 |
| Drainage Area (mi2) | 7.95 |
| Log(DA) | 0.90036712865647 |
| Calculation Last Updated | 7/22/2025 3:26:35 PM |
| Sampling Gear | ArtSub |
Sessions used in this analysis
Warm Water
Poor
Extremely low velocity (very close to zero) throughout the entire sampling reach.
BMIBI Score Explained
This site was analyzed using the BMIBI-Warm Water assessment methodology.
Sites that score between 0 - 30 are considered poor. Severely impaired macroinvertebrate community. Low numbers of taxa present, sensitive species not present, EPT taxa are rare or not present; community extremely unbalanced; dominated by a few pollution tolerant organisms; some trophic functional feeding groups are not represented. Total numbers of organisms may be low. Total taxa richness and EPT taxa richness are noticeably reduced from optimum levels; sensitive species and habitat specialists are rare; EPT taxa no longer dominate the macroinvertebrate community. Taxa that are tolerant of organic enrichment and/or excessive sediment loads are dominant; the community is unbalanced; a few generalist taxa make up a high percentage of the organisms present; collector-gatherers or collector-filterers are very dominant.
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 | 86 |
| 75th Percentile | 70 |
| Median | 62 |
| 25th Percentile | 54 |
| Min | 20 |
| This Session's Score | 16 |
| Total Reference Site Samples | 120 |
| Mean | 61.41 |
| Standard Deviation | 10.8 |