Table 1. Importance value of major species according to the survey plot types of the elapsed year after forest road construction at tree layer.

Scientific name (Korean name)	The elapsed year after forest road construction
	S	1yr			2yr			25yr			Total
		E	C	R	E	C	R	E	C	R
Pinus densiflora (소나무)	64.8	85.2			51.4			52.9	54.2		61.7
Quercus variabilis (굴참나무)	24.9	6.8			15.3			40.7	45.8		26.7
Quercus aliena (갈참나무)	4.0				18.1						4.4
Larix kaempferi (일본잎갈나무)					15.3						3.1
Quercus dentata (떡갈나무)		8.0						6.4			2.2
Quercus mongolica (신갈나무)	3.1										1.3
Quercus serrata (졸참나무)	3.1										0.6
Total (7 species)	100.0	100.0			100.0			100.0	100.0		100.0