Pooled species richness (a, b) and average species richness per trap (c; mean with SE). The data were taken from the LTER site (1 ha) in Gwangneung forest, South Korea. Rarefaction curves of species richness along with samples (a) and number of individuals (b). The former and latter curves were made using EstimateS (Colwell et al. ) and EcoSim (Gotelli and Entsminger ), respectively. In average species richness, different letters denote significant difference between groups (Mann-Whitney U test, P < 0.05).