Table 7.
Change of plant cluster structure in Plot 4 of Qureus mongolica forest of the northern slope of Namsan(Mt.)(2000~2016)(Area: 400m²)

Layer	Species	2000				2005				2007				2016
		C1	U	S	M	C	U	S	M	C	U	S	M	C	U	S	M
Relative ratio (%)	Quercus serrata	21.46	-	-	10.73	27.62	-	-	13.81	18.11	-	-	9.06	57.29	-	11.48	30.56
	Sorbus alnifolia	-	53.66	6.55	18.98	-	51.63	-	17.21	6.27	33.87	-	14.43	-	47.88	-	15.96
	Quercus mongolica	70.76	4.43	16.04	39.53	65.61	4.05	7.24	35.36	64.87	-	16.79	35.23	27.62	-	9.64	15.42
	Styrax japonicus	-	18.34	3.09	6.63	-	18.06	4.31	6.74	-	40.42	-	13.47	-	25.22	0.7	8.52
	Prunus sargentii	7.78	16.99	-	9.55	6.77	20.5	-	10.22	10.74	19.01	-	11.71	15.09	2.16	0.48	8.35
	Robinia pseudoacacia	-	-	0.65	0.11	-	-	2.22	0.37	-	-	2.78	0.46	-	7.17	-	2.39
	Aralia elata	-	-	2.8	0.47	-	-	0.81	0.14	-	-	-	-	-	3.65	6.71	2.34
	Parthenocissus teicuspidata	-	-	4.01	0.67	-	-	1.63	0.27	-	-	4.25	0.71	-	-	13.43	2.24
	Stephanandra incisa var. incisa	-	-	19.64	3.27	-	-	11.79	1.97	-	-	33.13	5.52	-	-	11.17	1.86
	Euonymus alatus for. ciliatodentatus	-	-	-	-	-	-	-	-	-	-	-	-	-	3.91	3.05	1.81
	Acer pseudosieboldianum	-	2.08	-	0.69	-	1.91	-	0.64	-	2.17	3.38	1.29	-	2.16	4.61	1.49
	Callicarpa japonica	-	-	6.34	1.06	-	-	15.76	2.63	-	-	9.05	1.51	-	-	7.73	1.29
	Smilax china	-	-	-	-	-	-	-	-	-	-	-	-	-	3.53	-	1.18
	Viburnum erosum	-	-	13.35	2.23	-	-	33.48	5.58	-	-	8.88	1.48	-	-	6.63	1.11
	Fraxinus rhynchophylla	-	2.16	-	0.72	-	1.91	-	0.64	-	2.17	-	0.72	-	2.27	-	0.76
	Euonymus oxyphyllus	-	2.34	1.66	1.06	-	1.94	6.39	1.71	-	2.36	5.99	1.78	-	-	4.38	0.73
	Paulownia coreana	-	-	-	-	-	-	-	-	-	-	-	-	-	2.05	-	0.68
	Kalopanax septemlobus	-	-	4.43	0.74	-	-	3.88	0.65	-	-	1.06	0.18	-	-	4.03	0.67
	Rubus crataegifolius	-	-	-	-	-	-	-	-	-	-	-	-	-	-	3.75	0.63
	Rhododendron mucronulatum var. mucronulatum	-	-	9.98	1.66	-	-	5.85	0.98	-	-	7.73	1.29	-	-	2.79	0.47
	Sambucus williamsii var. coreana	-	-	-	-	-	-	-	-	-	-	-	-	-	-	1.65	0.28
	Ligustrum obtusifolium	-	-	-	-	-	-	0.86	0.14	-	-	-	-	-	-	1.48	0.25
	Ailanthus altissima	-	-	-	-	-	-	-	-	-	-	-	-	-	-	1.52	0.25
	Morus bombycis	-	-	-	-	-	-	-	-	-	-	-	-	-	-	1.3	0.22
	Symplocos chinensis for. pilosa	-	-	3.71	0.62	-	-	1.09	0.18	-	-	2.71	0.45	-	-	0.7	0.12
	L. cyrtobotrya	-	-	-	-	-	-	-	-	-	-	-	-	-	-	0.7	0.12
	Pueraria montana var. lobata	-	-	-	-	-	-	-	-	-	-	-	-	-	-	0.6	0.1
	Celastrus orbiculatus	-	-	0.82	0.14	-	-	-	-	-	-	-	-	-	-	0.48	0.08
	Zanthoxylum piperitum	-	-	1.16	0.19	-	-	-	-	-	-	-	-	-	-	0.48	0.08
	Morus alba	-	-	-	-	-	-	-	-	-	-	-	-	-	-	0.48	0.08
	Rhus trichocarpa	-	-	1.83	0.31	-	-	1.85	0.31	-	-	2.13	0.36	-	-	-	-
	Juniperus rigida	-	-	0.92	0.15	-	-	-	-	-	-	-	-	-	-	-	-
	Lespedeza maximowiczii	-	-	0.95	0.16	-	-	1.31	0.22	-	-	-	-	-	-	-	-
	Smilax sieboldii	-	-	2.07	0.35	-	-	1.53	0.26	-	-	2.13	0.36	-	-	-	-
The number of populatio		11	25	328	364	11	27	280	318	13	24	240	277	5	30	452	487
Amount of species(species)		23				21				18				30
Shannon’s species diversity index(H’)		1.0937				1.1183				1.0802				1.1999
Various species diversity indices(2016)		H’(Shannon)				J’(evenness)				D(dominance)				H’max
		1.1999				0.8123				0.1877				1.4771

C: Canopy layer of importance percentage, U: Understory layer of importance percentage, S: Shrub layer of importance percentage, M: Mean importance percentage.