Most are part of larger ecosystems , directly adjacent or ecologically connected to better known national parks and wilderness areas. Removing Roadless Rule protections would erode ecological buffers to these more famous protected lands. For some species, roadless areas protect critical core habitat . For instance, over half the suitable habitat for relictual slender salamander, a critically imperiled species native to the Sierra Mountains of California, occurs in a roadless area. Nearly 40 percent of Mount Pinos, lodgepole chipmunk, an imperiled subspecies of the lodgepole chipmunk, also live in roadless areas in California. Research shows that every formal roadless area provides habitat for at least two wildlife species of conservation concern – those facing risks to their long-term survival – with the median roadless area supporting 10 of these imperiled species
