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Published online 16 October 2007
Published in J Environ Qual 36:1653-1660 (2007)
DOI: 10.2134/jeq2006.0521
© 2007 American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Relationships between Water Quality, Habitat Quality, and Macroinvertebrate Assemblages in Illinois Streams

Thomas Heatherly, IIa,*, Matt R. Whilesa, Todd V. Royerb and Mark B. Davidc

a Southern Illinois Univ. Carbondale, Dep. of Zoology and Center for Ecology, Carbondale, IL, 62901-6501
b School of Public and Environmental Affairs, Indiana Univ., Bloomington, IN 47405
c Univ. of Illinois, Dep. of Natural Resources and Environmental Sciences, Urbana, IL 61801


Figure 1
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  		Fig. 1. Map of Illinois showing the approximate locations of the 53 wadeable streams sampled. Colors indicate major watersheds. Map created by Sally A. McConkey and Kathleen J. Brown, Illinois State Water Survey. Map and legend for watersheds can be found at http://www.watershed.uiuc.edu/getting_involved/map.cfm.

 

Figure 2
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  		Fig. 2. Dendrogram of Illinois study streams resulting from a hierarchical cluster analysis of benthic macroinvertebrate presence–absence data. Streams were separated into the four groups shown based on Bray-Curtis dissimilarity. Stream site codes are from Table 1.

 

Figure 3
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  		Fig. 3. Nonmetric multidimensional scaling ordination of presence–absence data for benthic macroinvertebrate taxa in Illinois streams. Graphs represent Axis 1 vs. Axis 2, Axis 1 vs. Axis 3, and Axis 2 vs. Axis 3. The stream groups were determined by cluster analysis (Fig. 2). Correlation coefficients and P values for vectors are listed in Table 4. DRP, dissolved reactive P.

 




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