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

Ioway Creek Ames- Veenker Golf Course (REMAP #9)

Analysis Summary for Series #572

Benthic Macroinvertebrate Index of Biotic Integrity (BMIBI)

Metric Name Value Score
MH Total Taxa 41 7.88
SH Total Taxa 15 6.61
MH EPT Taxa 26 9.63
SH EPT Taxa 11.67 7.94
MH Sensitive Taxa 11 10
SH Ephem % 41.11 5.26
SH EPT % 77.43 8.11
SH Chiron % 4.8 9.62
SH Scraper % 25.09 5.61
SH Top3Dom % 52.74 7.5
SH Dom FFG % 43.97 9.34
MHBI 4.85 7.96
*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 7/18/2002
Sampling Series Series #572
Drainage Area (mi2) 193.642
Log(DA) 2.28699955953216
Calculation Last Updated 7/22/2025 3:35:17 PM
Sampling Gear Hess
BMIBI Score
80
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 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:

Des Moines Lobe

This site is in the Des Moines Lobe ecoregion.

Ecoregion Map
Max 84
75th Percentile 68
Median 59
25th Percentile 51
Min 10
This Session's Score 80
Total Reference Site Samples 162
Mean 58.11
Standard Deviation 13.08