My colleagues and I just published a new study in Ecology and Society highlighting 150 years of history of Yosemite National Park. We documented seven legal changes that altered the boundaries of the park – both reductions and additions. We found that Yosemite lost 30% of its original area from when it was established in 1890. We also found that some lands which were removed from the park were subsequently re-protected as wilderness due to the passage of the 1964 Wilderness Act. Forests which were downsized from Yosemite and remain unprotected are more highly fragmented by roads today. Higher road density indicates that the ecosystems are more degraded. Roads may also inhibit migration as species attempt to adapt to climate change.
This piece is part of a broader research effort on protected area downgrading, downsizing, and degazettement (PADDD) which focuses on legal changes to protected areas around the world. Learn more at PADDDtracker.org and follow @PADDDtracker on twitter.