Table 2. Stem density (number of stems ha-1) and importance percentage (IP) of woody plants (DBH ≥ 2 cm) in Abies holophylla stand (NA I) in Ihwa-ri, and forest belt (FB) and Pinus koraiensis plantation (PP I) in Sanyoo-ri. IP (%) of a species = [(Relative stem density + relative stem basal area)/2]×100.
| Study site Stand | Ihwa-ri | Sanyoo-ri |
| NA Ⅰ | FB | PP I |
| Stems ha-1 | BA (m2 ha-1) | IP (%) | Stems ha-1 | BA (m2 ha-1) | IP (%) | Stems ha-1 | BA (m2 ha-1) | IP (%) |
| Abies holophylla | 1000 | 28.31 | 58.6 | 400 | 40.88 | 60.7 | 450 | 44.70 | 66.7 |
| Larix kaempferi | 25 | 2.54 | 3.6 | | | | | | |
| Pinus koraiensis | 75 | 5.04 | 7.7 | 75 | 8.96 | 12.6 | 175 | 9.35 | 18.6 |
| Quercus serrata | 125 | 3.31 | 7.1 | | | | | | |
| Quercus variabilis | 25 | 0.03 | 0.7 | | | | 25 | 0.28 | 1.7 |
| Quercus aliena | | | | 25 | 0.13 | 1.5 | 50 | 0.08 | 2.9 |
| Quercus monglolica | | | | 75 | 0.13 | 4.4 | | | |
| Castanea crenata | 75 | 4.19 | 6.7 | 50 | 3.19 | 5.8 | | | |
| Prunus sargentii | 50 | 0.16 | 1.5 | 75 | 0.15 | 4.4 | | | |
| Ulmus davidiana | | | | 25 | 0.07 | 1.5 | | | |
| Fraxinus rhynchophylla | | | | 25 | 0.07 | 1.5 | | | |
| Morus australis | | | | 75 | 0.38 | 4.6 | 50 | 0.06 | 2.9 |
| Lindera obtusiloba | 450 | 0.31 | 12.2 | | | | 75 | 0.06 | 4.3 |
| Rhamnus davurica | 50 | 0.02 | 1.3 | | | | | | | |
| Symplocos sawafutagi | 25 | 0.01 | 0.7 | 50 | 0.02 | 2.9 | 25 | 0.03 | 1.5 |
| Rhus chinensis | | | | | | | 25 | 0.01 | 1.4 |
| Total | 1900 | 43.91 | 100.0 | 875 | 53.99 | 100.0 | 875.0 | 54.57 | 100.0 |