Elk Creek Elk Creek Marsh SWMA - Kensett
Analysis Summary for Series #1266
Benthic Macroinvertebrate Index of Biotic Integrity (BMIBI)
| Metric Name | Value | Score |
|---|---|---|
| MH Total Taxa | 38 | 8.1 |
| SH Total Taxa | 6.33 | 3.4 |
| MH EPT Taxa | 3 | 1.36 |
| SH EPT Taxa | 1 | 0.79 |
| MH Sensitive Taxa | 0 | 0 |
| SH Ephem % | 0.83 | 0.11 |
| SH EPT % | 0.83 | 0.09 |
| SH Chiron % | 48.91 | 5.16 |
| SH Scraper % | 0 | 0 |
| SH Top3Dom % | 95.56 | 0.8 |
| SH Dom FFG % | 96.64 | 0.56 |
| MHBI | 7.13 | 0 |
| *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 | 9/26/2012 |
| Sampling Series | Series #1266 |
| Drainage Area (mi2) | 40.745 |
| Log(DA) | 1.61007432214005 |
| Calculation Last Updated | 7/22/2025 3:28:02 PM |
| Sampling Gear | ArtSub |
Sessions used in this analysis
Warm Water
Poor
Little to no flow throughout the 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 | 84 |
| 75th Percentile | 68 |
| Median | 59 |
| 25th Percentile | 51 |
| Min | 10 |
| This Session's Score | 17 |
| Total Reference Site Samples | 161 |
| Mean | 58.18 |
| Standard Deviation | 13.09 |