Dataset for effect of elevation on the insect herbivory of Mongolian oaks in the high mountains of southern South Korea

We explored how elevation affects herbivores on one of the major cool-temperate trees, Quercus mongolica, in southern South Korea. The feeding activities of insect herbivores were measured through insect-feeding damage on leaves. Of 78 types of insect-feeding damage that were observed from Jirisan Mountain (Mount.) and Hallasan Mount. in Korea. Data template consists three sheets; 1. Data_raw: mountain types (HL, JR), survey sites (LYS, SJB, , SSA, SSJ), Number of examined leaves, Feeding type, Feeding type in Sohn et al. (2017), Feeding damage type, Feeding guild, and presence/absence 2. Mountain: Mountain, Mountain in full name, Survey site code, Survey site in full name, elevation of study site (m), latitute, longitude,, and forest type 3. Leaf damage: Abbreviation of feeding damage type and feeding damage type.