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Stream fish occurrence in response to impervious cover, historic land use, and hydrogeomorphic factors

Canadian Journal of Fisheries and Aquatic Sciences

6938_Wenger.pdf
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Abstract

We evaluated competing models explaining the occurrence of five stream fishes in an urbanizing watershed to determine the relative importance of (a) impervious surface and other indicators of current land use, (b) historic land use (e.g., agriculture, impoundments), and (c) hydrogeomorphic characteristics (e.g., stream size, elevation, geology). For four of five species, the best-supported models were those that included both current effective impervious cover and historic land use predictor variables, although models with only effective impervious cover were equally well supported for two of those species. For the best-supported models for three species, occurrence probability was predicted to approach zero at levels of development equivalent to about 2%?4% effective impervious cover in the surrounding region. Data were drawn from 357 fish collections made in the Etowah River basin, Georgia, USA, between 1998 and 2003 and analyzed using hierarchical logistic regression accounting for imperfect species detection. This is the first study we know of to examine the response of individual fish species to both increasing impervious cover and historic land use. Such individual species assessments will be increasingly necessary to guide policies for managing urban effects and preventing extirpations of sensitive species.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Stream fish occurrence in response to impervious cover, historic land use, and hydrogeomorphic factors
Series title:
Canadian Journal of Fisheries and Aquatic Sciences
Volume
65
Issue:
6
Year Published:
2008
Language:
English
Contributing office(s):
Patuxent Wildlife Research Center
Description:
1250-1264
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
First page:
1250
Last page:
1264
Number of Pages:
15