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

EFHI Interpretation

The Ecoregion Fish Habitat Index (EFHI) predicts a FIBI score based on physical habitat characteristics and the ecoregion where the site is located. The EFHI Interpretation is the difference between the Fish Index of Biotic Integry FIBI score and the EFHI score.

Difference > 18Favorable water quality and/or other environmental factors besides physical habitat are very likely to contribute to the observed FIBI score exceeding the predicted FIBI score.
Difference <= 18 but >=9Favorable water quality and/or other environmental factors besides physical habitat are somewhat likely to contribute to the observed FIBI score exceeding the predicted FIBI score.
Difference <=8 but >= -5The observed FIBI score is roughly equivalent to the predicted FIBI score and within expectations based on physical habitat characteristics and ecoregion.
Difference >= -12 but <=-6Adverse water quality and/or other environmental factors besides physical habitat are somewhat likely to contribute to the predicted FIBI score exceeding the observed FIBI score.
Difference < -12Adverse water quality and/or other environmental factors besides physical habitat are very likely to contribute to the predicted FIBI score exceeding the observed FIBI score.

This page was created 9/20/2018 1:55:12 PM and was last updated 11/12/2021 10:34:42 AM