Cumulative area under protection (%) for each country is shown for all strictly protected areas in the upper panel and for the 3 different IUCN categories (Ia, Ib, and II) in the lower panels The original article has been corrected. Cumulative area under protection (%) for each biogeographical region is shown for all strictly protected areas in the upper panel and for the 3 different IUCN categories (Ia, Ib, and II) in the lower panels Graph: Fig.