Table 5. Mean importance percentage of each of communities

Scientific name	Community Ia	Community IIb	Community IIIc	Community IVd	Community Ve	Community VIf
Pinus densiflora	46.4	8.4	8.2	-	4.2	4.0
Quercus mongolica	11.0	37.6	12.9	1.8	12.6	3.5
Quercus serrata	10.7	5.6	29.7	6.8	0.9	4.2
Betula schmidtii	2.2	-	1.5	52.1	-	-
Quercus acutissima	0.7	-	0.7	-	31.4	2.0
Robinia pseudoacacia	0.8	6.7	-	-	27.7	5.5
Pinus koraiensis	0.1	1.8	2.1	-	-	46.8
Others	28.1	39.9	44.9	39.3	23.2	34.0
Total	100.0	100.0	100.0	100.0	100.0	100.0

I: Pinus densiflora community
II: Quercus mongolica community
III: Quercus serrata-Quercus mongolica community
IV: Betula schmidtii community
V: Quercus acutissima-Robinia pseudoacacia community
VI: Pinus koraiensis community