Transboundary Conservation across Scales: A World–Regional Inventory and a Local Case Study from the United States–Mexico Border

Transboundary conservation, which involves protecting ecosystems that span international borders, has expanded significantly over the past half-century. A global inventory reveals 227 transboundary protected areas (TBPAs) covering over 4.6 million square kilometers, with notable examples including the Waterton Glacier International Peace Park (30,975 km²), straddling the U.S.-Canada border since 1932. However, the term 'transboundary' encompasses a range of configurations, from contiguous reserves to clusters of separate areas, often lacking clear definitions. The study examines regional disparities in TBPAs and explores challenges in cross-border coordination, using the U.S.-Mexico border as a local case study. It highlights the need for improved clarity in terminology and strategic planning to enhance effective conservation across borders.

Brenner, J. C., & Davis, J. G. (2012). Transboundary Conservation across Scales: A World–Regional Inventory and a Local Case Study from the United States–Mexico Border. Journal of the Southwest, 54(3), 499–519. https://doi.org/10.1353/jsw.2012.0023