Document Type

Article

Publication Version

Published Version

Publication Date

3-2007

Journal or Book Title

Journal of Freshwater Ecology

Volume

22

Issue

1

First Page

69

Last Page

79

DOI

10.1080/02705060.2007.9664147

Abstract

We characterized the fish assemblages in second to fifth order streams of the upper Little Sioux River basin in northwest Iowa, USA and compared our results with historical surveys. The fish assemblage consisted of over twenty species, was dominated numerically by creek chub, sand shiner, central stoneroller and other cyprinids, and was dominated in biomass by common carp. Most of the species and the great majority of all individuals present were at least moderately tolerant to environmental degradation, and biotic integrity at most sites was characterized as fair. Biotic integrity declined with increasing stream size, and degraded habitat in larger streams is a possible cause. No significant changes in species richness or the relative distribution of species' tolerance appear to have occurred since the 1930s.

Comments

This article is from Journal of Freshwater Ecology 22 (2007): 69, doi:10.1080/02705060.2007.9664147.

Rights

Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.

Language

en

File Format

application/pdf