recreation ecology is the scientific study of environmental impacts resulting from recreational activity in protected natural areas. this field of study includes research and monitoring assessments of biophysical changes, analyses to identify causal and influential factors or support carrying capacity planning and management, and investigations of the efficacy of educational, regulatory, and site management actions designed to minimize recreation impacts. while studies of human trampling can be traced back to the late 1920s, a substantial body of recreation ecology literature did not accumulate until the 1970s when visitation to the outdoors soared, threatening the ecology of natural and semi-natural areas.