In this What's Up in the Environment? video segment, learn how wildlife biologists at the A.R.M. Loxahatchee National Wildlife Refuge are able to monitor the condition of the Florida Everglades' ecosystem. By studying various indicator species such as tree islands, alligators, and insects, the biologists can assess the progress of the restoration effort that began after the Comprehensive Everglades Restoration Plan (CERP) was approved as part of the Water Resources Development Act of 2000.