EPA Region 4

Relative Extent

Relative Risk to
Macroinvertebrate
Taxa Loss (O/E)

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

0

10

20

30

—i r-

40 0

8

% of Stream Length
in Poor Condition

Relative Risk Ratio

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