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The
Nature Conservancy Ecoregions
Based
on original work by Robert Bailey, U.S.D.A.
Forest Service, ecoregions were modified by TNC in cooperation with the
network of Natural
Heritage Programs. The Lower 48 United States is divided into 64 ecoregions,
eight of which
include part of Illinois: the Central Tallgrass Prairie, Great Lakes,
Interior Low Plateau,
Mississippi River Alluvial Plain, North Central Till Plain, Ozarks, Prairie-Forest
Border, and
Upper East Gulf Coast Plain. For more information, please go to: http://gis.tnc.org/
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