Many tropical forests are dominated by edge habitat, with consequences for forest structure, carbon stocks and biodiversity. However, edge effects are highly variable and context-dependent, and are poorly quantified in oil palm landscapes. We studied edge effects in 10 lowland rainforest remnants bordering mature oil palm plantations on Borneo, by surveying 0.2 ha plots along transects running perpendicular to the forest edge (ten 1.6 km transects, 5-6 plots per transect; 57 plots in total). We...