The effect of selective logging on terrestrial carbon stocks likely plays a larger-than-expected role in the climate system (15). Information about the spatial extent and intensity of selective logging is not yet available at the pantropical scale, but selective logging operations in the tropics rely on networks of roads to provide access for machinery and the transport of merchantable timber products (56). We simulated the spatial footprint of selective logging inside lost parcels by applying a buffer around roads mapped in the OpenStreetMap dataset (data copyrighted OpenStreetMap contributors and available from www.openstreetmap.org). We applied a 1-km buffer around roads to approximate where selective logging is likely to occur in lost parcels between 2013 and 2050. The 1-km buffer size was based on previous assessments of the relationship between accessibility and the intensity of selective logging (57). We removed selective logging footprints that overlapped with nonforest areas, burned area, or forest clearance inside lost parcels.

Selective logging footprints inside lost parcels were split into conventional logging or responsible logging areas (table S1). We based proportional estimates of responsible logging on nationally reported statistics on how much of the selective logging that occurs in their forests is responsible (58). In cases where responsible logging estimates were not available for a particular country, responsible logging proportional extents were set to mean of estimates from countries in the same continent.

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