by Marilyn Marler
Abstract—I conducted a survey of wilderness areas to provide an overview of plant invasions in the National Wilderness Preservation System. Fifteen per cent of responding mangers reported that exotic plants were among their top 10 management concerns, either because they are actively dealing with control of exotic pest plants or have prioritized prevention of their establishment. Seventy per cent of responding wilderness areas do not monitor or inventory for exotic plants. The majority of respondents reported that exotic plants have not impacted their areas, so it is important to emphasize prevention and early detection of exotic plant establishment. Responses varied greatly among regions, with the highest priority being given to exotic plants by agencies in the California Mediterranean region and the Rocky Mountain montane region. The National Park Service was most likely to monitor or inventory for exotic plants. The greatest needs for most areas are increased funding, education and training to prevent further establishment of exotic plants.