In developing this master plan, the Prairie Research Institute at the University of Illinois consulted extensively with the Forest Preserves’ staff, volunteers, and partners. Institute staff compiled and analyzed existing data collected over many years by the Forest Preserves and other organizations, institutions, and individuals. Staff also visited most of the preserves to assess their natural communities and the threats they face. This report summarizes their findings and presents recommendations for natural and cultural resources management. The Forest Preserves have also received technical reports providing more detailed analysis, the data compiled from all sources, and a Geographic Information System that integrates all geographicall...