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Macroinvertebrate community structure and related environmental variables in two forks of the Virgin River, Utah

Western North American Naturalist

By:
and

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Abstract

Using multivariate analysis techniques, we analyzed variation in the structure of the benthic macroinvertebrate community in the North Fork and East Fork of the Virgin River in and above Zion National Park in concert with a number of naturally occurring and anthropogenic environmental variables. Correspondence analysis revealed that the community structure in the 2 streams was markedly different despite occurring in areas similar in topography, elevation, and terrestrial vegetation cover. Subsequent analyses of the 2 streams separately using canonical correspondence analysis to test for strength of association of environmental variables with variations in benthic macroinvertebrate community structure revealed that communities in the East Fork of the Virgin River were more associated with nitrogen-related variables influenced by agricultural and urban activities along the river and that communities in the North Fork were most strongly associated with naturally occurring physical variables.

Additional publication details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Macroinvertebrate community structure and related environmental variables in two forks of the Virgin River, Utah
Series title:
Western North American Naturalist
Volume:
63
Issue:
2
Year Published:
2003
Language:
English
Publisher:
Monte L. Bean Life Science Museum, Brigham Young University
Contributing office(s):
Fort Collins Science Center
Description:
12 p.
First page:
155
Last page:
166