Table 12.
Changes in the number of species of 8 fixed plots in Qureus mongolica forest of Namsan(Mt.)(2005~2016)
| Plot | Layer | Species | 3rd 2005 | 4th 2016 |
| Pot 1 | Canopy layer | Quercus mongolica | 41 | 15 |
| Quercus serrata | 3 | 2 |
| Robinia pseudoacacia | 2 | 1 |
| Understory layer | Styrax japonicus | 50 | 36 |
| Sorbus alnifolia | 30 | 13 |
| Acer pseudosieboldianum | 29 | 31 |
| Plot | Layer | Species | 3rd 2007 | 4th 2016 |
| Pot 2 | Canopy layer | Quercus mongolica | 5 | 3 |
| Understory layer | Styrax japonicus | 17 | 11 |
| Acer pseudosieboldianum | 9 | 12 |
| Sorbus alnifolia | 9 | 8 |
| Pot 3 | Canopy layer | Quercus mongolica | 15 | 8 |
| Sorbus alnifolia | 1 | 1 |
| Kalopanax septemlobus | 1 | 1 |
| Understory layer | Styrax japonicus | 12 | 11 |
| Acer pseudosieboldianum | 6 | 5 |
| Sorbus alnifolia | 4 | 5 |
| Pot 4 | Canopy layer | Quercus mongolica | 8 | 2 |
| Prunus sargentii | 2 | 1 |
| Understory layer | Styrax japonicus | 13 | 8 |
| Acer pseudosieboldianum | 1 | 1 |
| Sorbus alnifolia | 6 | 8 |
| Robinia pseudoacacia | 0 | 4 |
| Pot 5 | Canopy layer | Quercus mongolica | 10 | 6 |
| Robinia pseudoacacia | 9 | 5 |
| Sorbus alnifolia | 2 | 2 |
| Understory layer | Styrax japonicus | 1 | 1 |
| Acer pseudosieboldianum | 2 | 2 |
| Sorbus alnifolia | 29 | 29 |
| Quercus mongolica | 0 | 1 |
| Pot 6 | Canopy layer | Quercus mongolica | 10 | 5 |
| Prunus sargentii | 5 | 4 |
| Zelkova serrata | 1 | 1 |
| Understory layer | Styrax japonicus | 1 | 3 |
| Zelkova serrata | 2 | 5 |
| Sorbus alnifolia | 11 | 6 |
| Pot 7 | Canopy layer | Quercus mongolica | 6 | 3 |
| Zelkova serrata | 1 | 2 |
| Sorbus alnifolia | 1 | 6 |
| Understory layer | Styrax japonicus | 14 | 7 |
| Kalopanax septemlobus | 1 | 1 |
| Sorbus alnifolia | 11 | 9 |
| Pot 8 | Canopy layer | Quercus mongolica | 8 | 8 |
| Fraxinus rhynchophylla | 5 | 7 |
| Understory layer | Sorbus alnifolia | 27 | 18 |
| Styrax japonicus | 8 | 7 |
| Fraxinus rhynchophylla | 2 | 1 |