The Critical Trends Assessment Program (CTAP) monitors the biological condition of Illinois’ forests, wetlands, and grasslands. This program,  supported by the Illinois Department of Natural Resources, is the first statewide comprehensive assessment of its kind. Since 1997, scientists from the Illinois Natural History Survey have collected plant, bird, and arthropod data at more than 600 randomly selected sites on both public and private lands. The data we collect and analyze are used to help numerous stakeholders understand the past and current condition of Illinois’ ecosystems.

In this presentation, James Ellis explains more about the Critical Trends Assessment Program.