Fig. 2

A Frequency of studies by year. B Cumulative frequency of the 10 wilderness areas with the most studies. Circles indicate the first year the wilderness area occurs in our sample. Bob Marshall Wilderness, Scapegoat Wilderness, and Great Bear Wilderness were combined into “Bob Marshall Wilderness Complex”; Gila Wilderness and Aldo Leopold Wilderness were combined into “Gila / Aldo Leopold Wilderness Complex”