Iowa DNR
BioNet
River & Stream Biological Monitoring
Fish and Benthic Macroinvertebrate Surveys
Physical Habitat Assessments

Tetes Des Morts Creek St Donatus (original bio site)

Analysis Summary for Series #1991

Benthic Macroinvertebrate Index of Biotic Integrity (BMIBI)

Metric Name Value Score
MH Total Taxa 50 10
SH Total Taxa 16 8.65
MH EPT Taxa 16 7.32
SH EPT Taxa 9.33 7.42
MH Sensitive Taxa 4 4.06
SH Ephem % 19.92 2.55
SH EPT % 82.86 8.68
SH Chiron % 3.82 9.72
SH Scraper % 4.9 1.1
SH Top3Dom % 58.42 7.55
SH Dom FFG % 65.6 5.73
MHBI 5.41 5.89
*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 9/13/2016
Sampling Series Series #1991
Drainage Area (mi2) 39.572
Log(DA) 1.59738800040537
Calculation Last Updated 7/22/2025 3:28:41 PM
Sampling Gear Hess
BMIBI Score
66
Warm Water
Good

BMIBI Score Explained

This site was analyzed using the BMIBI-Warm Water assessment methodology.

Sites that score between 56 - 75 are considered good. A slight reduction in number (Ephemeroptera, Plecoptera, Trichoptera) of taxa; however, good numbers of taxa are present, including several sensitive species, EPT taxa are fairly diverse and dominate the community. The most sensitive taxa and some habitat specialists may not be present and/or are reduced in abundance. The community is balanced, with no taxon excessively dominating in abundance. One functional feeding group, often collector filterers or collector gatherers, may be somewhat dominant.

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:

Paleozoic Plateau (Driftless Area)

This site is in the Paleozoic Plateau (Driftless Area) ecoregion.

Ecoregion Map
Max 87
75th Percentile 78
Median 70
25th Percentile 62
Min 52
This Session's Score 66
Total Reference Site Samples 55
Mean 70.55
Standard Deviation 9.41