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

Brush Creek Andrew (REMAP #437)

Analysis Summary for Series #2125

Benthic Macroinvertebrate Index of Biotic Integrity (BMIBI)

Metric Name Value Score
MH Sensitive Taxa 4 4.44
SH Dom FFG % 56.26 6.81
MH Total CW Taxa 0 0
MH Tricop No Hydrop 2 3.1
MH Tolerant % 20.45 5.77
SH CW % 0 0
SH Hydropsyche % 9.88 3.35
SH Hydropsychinae % 46.36 3
BTI 5.06 4.87
*Mouse-over metric for full name
**Final IBI is sum of scores multiplied by 1.1111

Analysis Factors

Factor Value
BMIBI Type Cold Water
Sample Date 9/26/2017
Sampling Series Series #2125
Drainage Area (mi2) 13.3
Log(DA) 0
Calculation Last Updated 7/22/2025 3:39:28 PM
Sampling Gear Hess
BMIBI Score
35
Cold Water
Not Assigned

BMIBI Score Explained

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

A detailed analysis of the IBI score has not yet been determined for coldwater IBI metrics.

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:

There are not enough sampling sessions collected at reference sites in this ecoregion to generate a meaningful comparison.