Table 5. Evaluation results of the naturalness recovery of plantation forests within Gwangneung Forest. The numbers indicate the number of plots classified into each naturalness recovery level. Numbers in parentheses are 95% Clopper–Pearson confidence intervals (%)

Category Indicator Evaluation Score
Good Fair Poor
Structure Importance Value of Planted Species 28 54 40
Canopy Cover of Tree Layer 55 48 19
Crown density 42 71 9
Vertical Stratification 27 75 20
Species Diversity Species Richness 8 57 57
Species Evenness 52 43 27
Shannon Diversity Index 36 48 38
Simpson Diversity Index 61 41 20
Species Composition Proportion of Indicator Families 96 22 4
Number of Annual Herbaceous Species 94 26 2
Number of Naturalized Species 108 13 1
Total 61 (40.81-59.19%) 40 (24.56-41.87%) 21 (10.98-25.10%)