Table 4. Actual vegetation type of study site

No.	Actual vegetation type	Area (m2)	Ratio (%)	No.	Actual vegetation type	Area (m2)	Ratio (%)
1	Pinus densiflora	107,954	15.6	14	Acer pseudosieboldianum	173	0.1
2	Pinus densiflora-Quercus mongolica	110,201	15.9	15	Pinus koraiensis	11,515	1.6
3	Quercus mongolica	196,744	28.5	16	Pinus koraiensis-Paulownia coreana	1,084	1.2
4	Quercus mongolica-Pinus densiflora	57,435	8.3	17	Pinus strobus	3,673	0.5
5	Quercus mongolica-Pinus densiflora-Robinia pseudoacacia	3,948	0.5	18	Robinia pseudoacacia	41,157	5.9
6	Quercus mongolica-Quercus serrata	14,753	2.1	19	Robinia pseudoacacia-Pinus strobus	3,327	0.5
7	Quercus mongolica-Quercus serrata-Alnus hirsuta	7,171	1.0	20	Robinia pseudoacacia-Quercus mongolica	6,197	0.9
8	Quercus mongolica-Quercus variabilis	8,767	1.2	21	Castanea crenata-Robinia pseudoacacia	628	0.1
9	Quercus mongolica-Betula schmidtii	23,089	3.3	22	Destructed facility	1,410	0.2
10	Quercus mongolica-Robinia pseudoacacia	20,140	2.9	23	Damaged slope area	6,267	0.9
11	Quercus acutissima-Quercus variabilis	8,972	1.3	24	Landscape woody plants	5,384	0.7
12	Betula schmidtii	11,398	1.6	25	Field	4,844	0.6
13	Betula schmidtii-Quercus mongolica	12,833	1.8	26	Urban area	20,528	2.8
				Total		689,592	100.0