Table 3. The dendrogram of classification by TWINSPAN and importance value of major plant species according to each layer.

		Group	Species	Layer				MIV
				T	ST	S	H
A.acerifolia (+)	λ=0.374	I (plot1, plot3, plot4)	Berchemia berchemiifolia	59.3	-	-	-	42.8
			Styrax obassia	5.7	42.0	-	0.2	9.1
			Quercus serrata	10.9	-	-	-	7.8
			Acer pseudosieboldianum	-	21.7	12.4	-	7.8
			Lindera obtusiloba	-	-	67.5	15.5	6.6
			Fraxinus rhynchophylla	6.8	1.4	-	-	4.8
			Acer pictum	6.0	-	-	0.3	4.7
			Platycarya strobilacea	5.9	-	-	-	3.7
			Carpinus cordata	0.8	33.3	-	0.1	3.4
			Hydrangea macrophylla	-	-	5.1	35.8	2.2
			Zelkova serrata	1.8	1.4	-	-	1.8
			Parthenocissus tricuspidata	-	-	-	29.9	1.5
			Quercus mongolica	1.8	-	0.2	-	1.3
			Lindera erythrocarpa	-	-	9.2	8.1	0.9
			Carpinus laxiflora	1.0	-	-	-	0.7
			Oplismenus undulatifolius	-	-	-	8.0	0.4
			Callicarpa japonica	-	-	5.2	0.5	0.4
			Others(8 species)	-	-	0.4	1.6	0.1
		II (plot2, plot5, plot6)	Berchemia berchemiifolia	65.3	4.2	-	-	46.7
			Acer pseudosieboldianum	-	60.4	24.0	-	11.3
			Quercus variabilis	8.9	-	-	-	7.7
			Styrax obassia	4.6	29.2	0.2	-	6.4
			Carpinus laxiflora	9.0	6.3	0.2	0.1	5.4
			Cornus controversa	7.2	-	-	-	5.1
			Lindera erythrocarpa	1.3	-	9.5	30.9	3.9
			Lindera obtusiloba	-	-	17.8	3.7	3.7
			Alangium platanifolium	-	-	13.8	3.2	3.5
			Ainsliaea acerifolia	-	-	-	32.9	1.9
			Callicarpa japonica	-	-	33.5	-	1.0
			Quercus mongolica	1.0	-	-	-	0.7
			Zelkova serrata	1.3	-	-	0.1	0.7
			Acer pictum	1.3	-	-	-	0.7
			Disporum smilacinum	-	-	-	7.2	0.5
			Viola albida	-	-	-	11.7	0.4
			Oplismenus undulatifolius	-	-	-	8.2	0.2
			Others(14 species)	-	-	0.1	2.0	0.2