WFP selected as field site for Critical Trends Assessment Program
In early August, Illinois Department of Natural Resources botanist James L. Ellis,
IDNR Ornithologist Steven D. Bailey and IDNR Monitoring Coordinator, Dr. Brenda Molano-Flores paid
a random site visit to Wolf Road Prairie.
This photo of Wolf Road Prairie at peak summer
bloom was taken at the time of the site visit.
The Critical Trends Assessment Program (CTAP) is a long-term endeavor,
which monitors the condition of forests, wetlands, grasslands, and streams throughout
the state of Illinois. This project seeks to assess changes in ecological conditions as
well as serving as a baseline from which to compare regional and site-specific patterns
throughout Illinois. This program is unique because it is the first-ever attempt at a
statewide comprehensive assessment undertaken by a state natural resource
organization (Illinois Department of Natural Resources).
A total of 600 sites representing four habitats (150 of each; 30 sites per
habitat per year) have been randomly selected from across the state on both public
and private land. Since 1997 the CTAP professional scientists of the Illinois Natural
History Survey (INHS) have been conducting surveys at these sites. As of 2001
140 forest, 139 wetland, 126 grassland, and 150 stream sites have been monitored . In
forests, wetlands, and grasslands data on herbaceous and woody vegetation, bird,
and insect data is collected.
This year rattlesnake master was abundant at Wolf Road Prairie
Among other things several ecological
indicators such as species richness, diversity, and dominance of native vs. non-native,
presence of threatened and endangered species at every site are measured. In the case of birds,
data on cowbird abundance is collected. In streams, aquatic insects are the
primary assemblage used as indicators of condition.
The Critical Trends Assessment Program can be found on the
Internet at: http://eagle.inhs.uiuc.edu/ctap/index.html
Photos by Cynthia Gehrie
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