EPA Region 6

Relative Extent

Riparian Disturbance
Salinity
Acidification
Riparian Vegetative Cover
In-stream Fish Habitat
Streambed Sediments
Nitrogen
Phophorous

Relative Risk to
Macroinvertebrate
Integrity (IBI)

r-

o

10 20 30 40

—i r-

50 0

i

2

i

4

% of Stream Length Relative Risk Ratio
in Poor Condition

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