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Central Forest/Grassland Transition Zone
Mindewin National Tallgrass Prairie, Wilmington, Illinois (c) 2008 Steven J. Baskauf
Source of bioregions data: Olson, D. M. and E. Dinerstein. The Global 200: Priority ecoregions for global conservation. (PDF file) Annals of the Missouri Botanical Garden 89:125-126.
Distinctiveness (1=highest,4=lowest): 2
Due to its large size and position between the Great Plains and the eastern deciduous forest, this ecoregion has one of the highest species richness in North America. It is in the top ten ecoregions for reptiles, birds, butterflies, and tree species.*
Conservation Status (1=most endangered, 5=most
intact): 1 (critical)
Less than 1% of the habitat is intact in small, fragmented blocks. Nearly all is converted to corn and soybean production.*
Freshwater dunes, eastern shore of Lake Michigan, Indiana Dunes State Park, Indiana
dunes stabilized by Maram grass. (c) 2004 Maurice J. Kaurmann hires
Ringgold Prairie, southern Iowa.
(c) 2005 Ron E. VanNimwegen
* Ricketts, T.H., E. Dinerstein, D.M. Olson, C.J. Loucks, et al. (1999) Terrestrial Ecoregions of North America: A Conservation Assessment. World Wildlife Fund - United States and Canada. Island Press, Washington, D.C. pp. 301-302.