• Schaefer, Sandra M.
  University of Maine Graduate School
  

Habitat association models designed to predict species occurrence are often tested by comparing predictions to field observations. two types of error are then reported, omission (% of species not predicted but present on a site) and commission (% of species predicted but not present on a site). The purpose of this research was to assess the Maine Gap Analysis vertebrate predictions using the traditional site-specific approach and to determine what factors influence the amounts of errors reported. I also developed a species specific approach for testing the accuracy of the vertebrate predictions and compared these results to the site specific method.