Surveys were conducted in habitats not adequately represented in existing survey data sets and those likely to harbor introduced species. Target areas included riparian corridors, developed areas, roads and trails, pack stations, campgrounds, abandoned settlements, spray fields, and other disturbed areas. Field work focused on recording species diversity and abundance of all introduced taxa in targeted habitats.

Location information collected for all survey areas using Global Positioning System (GPS) receivers is forming the basis for Geographic Information System (GIS) maps depicting the distribution of non-native plants in the parks. These GIS databases will serve as resources for invasive plant management planning along with summaries of species biology and known control strategies.

Biology and species control information was gleaned from published sources to populate an atlas and bibliographic database for use in connection with distribution maps for each species encountered on surveys.