WWRC 87-24
Relations of Geomorphology to Stream Habitat
and Trout Standing Stock in Small Rocky Mountain Streams
Abstract
Evidence that drainage basin morphology and trout standing stock are related through
a functional link between geomorphic features and stream habitat quality is presented. Numerous
significant univariate correlations were found between geomorphic variables, stream habitat variables,
and trout standing stock in both high-elevalion forest and low-elevation rangeland streams
Canonical correlations between geomorphic variables and stream habilat variables provided insight
into the form of the functional link. Multiple-regression equations predicting trout standing stock
were dominated by geomorphic variables. When geomorphic variables alone were incorporated
into regression models they predicted trout standing stock as accurately as did stream habitat
variables.
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