Thanks to Scott C. McKay, Amanda S. Robertson, Charles Warwick, and Jennifer Tate for proofreading and editorial advice. Karen Fletcher first suggested this article, and she digitized the first slides and did the original html programming for the PrairieNet version of this web site.
Some of the information in this article came from work done as part of the Critical Trends Assessment Program of the Illinois Department of Energy and Natural Resources. The Critical Trends prairie chapter was prepared by Kenneth R. Robertson and Mark W. Schwartz, with the assistance of Brian K. Dunphy, H. David Clarke, Jeffrey W. Olson, and Lyle Trumbull.
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