Table 4. Mean relative importance value of major species for 13 populations distributed in the study area. Population abbreviations(Pk, Pj, Ak, etc.) are shown in Table 1.

Species	Natural										Artificial			Total
	Pd	Pj	Ak	Pp	Tk	Jv	An	Pk	Ah	Tc	Pr	Lk	Pk
Pinus densiflora	34.6	1.0	0.9	-	-	-	0.7	-	1.4	-	7.2	1.4	2.4	15.5
Quercus mongolica	16.3	2.3	8.8	3.5	-	5.3	5.0	10.7	12.0	4.8	10.4	7.8	10.9	11.4
Larix kaempferi	0.4	-	-	-	-	-	-	-	-	-	-	33.6	-	6.4
Pinus koraiensis	0.2	5.5	6.4	-	0.7	-	7.5	32.7	2.9	6.0	0.7	0.1	35.5	6.2
Acer pseudosieboldianum	2.7	3.1	5.6	0.3	-	-	1.3	5.3	9.3	5.6	-	1.8	3.4	3.2
Abies koreana	0.3	8.2	28.5	-	-	-	-	2.8	-	2.2	-	-	-	2.8
Fraxinus sieboldiana	4.7	0.2	3.7	-	-	-	0.7	0.5	1.3	2.1	2.7	0.5	0.9	2.7
Abies nephrolepis	0.0	-	-	4.9	34.9	15.8	39.0	7.8	-	2.9	-	-	-	2.6
Betula ermanii	0.1	15.3	6.2	7.7	0.2	4.5	9.0	6.8	1.7	2.4	-	0.1	-	2.2
Rhododendron schlippenbachii	2.9	2.9	3.6	0.1	0.2	-	1.7	2.3	2.3	0.9	1.2	0.4	1.5	2.1
Cornus controversa	1.4	-	0.6	-	-	-	0.1	0.3	0.9	0.9	-	7.0	2.6	2.1
Fraxinus rhynchophylla	2.2	-	0.3	-	-	-	0.1	0.7	1.8	0.3	0.1	4.3	4.3	2.0
Quercus variabilis	3.0	-	-	-	-	-	-	-	-	-	3.1	1.5	1.4	1.7
Taxus cuspidata	-	0.1	2.5	-	-	-	0.9	0.3	-	21.4	-	-	-	1.6
Sorbus commixta	0.1	6.3	2.0	0.8	1.2	-	5.6	5.1	2.0	3.5	-	0.2	-	1.4
Acer komarovii	0.0	7.0	3.0	0.9	-	-	1.3	2.1	2.3	8.2	-	0.0	0.3	1.3
Rhododendron mucronulatum	2.2	1.1	0.7	1.1	-	-	0.6	0.9	0.6	0.3	1.2	0.2	0.3	1.2
Quercus serrata	1.5	-	-	-	-	-	-	-	-	-	7.4	1.6	2.5	1.2
Castanea crenata	1.9	-	-	-	-	-	-	-	-	-	4.7	1.1	0.8	1.1
Picea jezoensis	0.0	31.6	2.4	-	-	-	-	0.3	-	-	-	-	-	1.1
Tripterygium regelii	0.5	3.3	1.9	2.5	2.8	-	1.2	1.9	0.2	3.4	0.2	0.9	0.5	1.1
Pinus rigida	0.5	-	-	-	-	-	-	-	-	-	29.1	-	0.5	1.0
Tilia amurensis	0.6	-	1.3	-	-	-	1.6	0.7	5.8	1.2	-	0.7	0.8	0.9
Abies holophylla	0.2	-	0.1	-	-	-	0.7	0.1	31.7	-	-	0.6	0.3	0.8
Carpinus cordata	0.2	-	2.4	-	-	-	-	-	3.3	0.8	-	1.2	0.5	0.6
Morus australis	0.2	-	0.0	-	-	-	-	-	-	-	-	2.3	0.4	0.5
Rhododendron mucronulatum var. ciliatum	0.0	1.2	0.6	11.3	5.9	11.3	2.6	0.8	-	0.1	-	-	0.0	0.4
Thuja koraiensis	4.3	-	-	-	37.6	-	1.1	0.6	-	0.3	-	-	-	0.3
Alnus incana subsp. hirsuta	0.4	-	0.2	-	-	-	-	-	0.9	-	2.6	0.2	-	0.3
Pinus pumila	-	-	-	32.8	0.2	-	0.0	-	-	-	-	-	-	0.2
Rubus crataegifolius	0.2	0.0	0.0	-	-	-	0.1	0.0	0.1	0.4	0.1	0.2	0.2	0.2
Vaccinium hirtum var. koreanum	0.2	0.3	0.1	3.3	0.6	4.6	0.4	0.2	0.1	0.3	-	0.0	0.1	0.2
Rhododendron brachycarpum	-	-	-	-	3.3	-	0.1	0.0	-	0.3	-	-	-	0.0
Juniperus chinensis var. sargentii	-	-	-	-	-	31.7	0.1	-	-	-	-	-	-	0.0
Albizia julibrissin	-	-	-	-	-	-	-	-	-	-	-	0.0	-	0.0
Others	22.5	10.6	18.1	30.8	47.4	25.2	19.9	17.5	19.5	32.0	29.3	32.2	30.2	23.9