Table 8.
Change of plant cluster structure in Plot 5 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 (%)	Sorbus alnifolia	-	69.38	1.77	23.42	4.05	68.6	2.97	25.39	7.05	89.97	8.72	34.97	10.33	84.59	1.4	33.6
	Robinia pseudoacacia	51.32	11.74	0.95	29.73	50.74	8.48	-	28.2	48.01	-	1.6	24.27	44.51	1.38	-	22.72
	Quercus mongolica	39.06	3.51	8.46	22.11	34.11	5.7	17.19	21.82	41.9	1.42	14.94	23.91	30.19	1.71	10.71	17.45
	Stephanandra incisa var. incisa	-	-	14.75	2.46	-	-	20.04	3.34	-	-	20.01	3.34	-	-	28.91	4.82
	Styrax japonicus	-	1.5	0.82	0.64	-	2.75	2.01	1.25	-	1.53	1.45	0.75	3.16	2.68	7.83	3.78
	E. nigrum	-	-	-	-	-	-	-	-	-	-	-	-	6.88	-	-	3.44
	Viburnum erosum	-	-	36.09	6.02	-	-	38.48	6.41	-	1.4	24.14	4.49	-	1.51	16.31	3.22
	Quercus serrata	-	2.48	3.97	1.49	-	3.46	3.5	1.74	-	-	4.59	0.77	4.93	1.71	0.69	3.15
	Carllicarpa japonica	-	-	2.96	0.49	-	-	4.39	0.73	-	-	-	-	-	-	7.39	1.23
	Acer pseudosieboldianum	-	1.25	0.82	0.55	-	2.4	-	0.8	-	2.86	-	0.95	-	3.51	-	1.17
	Parthenocissus teicuspidata	-	-	3.35	0.56	-	-	0.97	0.16	-	-	2.55	0.43	-	-	6.91	1.15
	Smilax sieboldii	-	-	5.66	0.94	-	-	1.99	0.33	-	-	0.7	0.12	-	-	5.11	0.85
	Kalopanax septemlobus	-	5.16	4.38	2.45	-	4.97	1.19	1.86	-	1.42	0.85	0.62	-	1.46	1.85	0.80
	Castanea crenata	-	-	-	-	-	-	0.55	0.09	-	-	2.62	0.44	-	1.46	-	0.49
	Rhus trichocarpa	-	-	3.75	0.63	-	-	0.39	0.07	-	-	2.55	0.43	-	-	1.98	0.33
	Ligustrum obtusifolium	-	-	-	-	-	-	0.69	0.12	-	-	2.34	0.39	-	-	1.56	0.26
	Lindera obtusiloba	-	-	2.94	0.49	-	-	0.46	0.08	-	-	0.99	0.17	-	-	1.38	0.23
	Acer palmatum	-	-	-	-	-	-	-	-	-	-	-	-	-	-	1.38	0.23
	Euonymus oxyphyllus	-	2.51	-	0.84	-	1.3	0.48	0.51	-	-	-	-	-	-	1.11	0.19
	Rhododendron yedoense	-	-	-	-	-	-	0.54	0.09	-	-	-	-	-	-	1.07	0.18
	Prunus serrulata var. spontanea	-	-	-	-	-	-	-	-	-	-	-	-	-	-	0.95	0.16
	Rubus crataegifolius	-	-	-	-	-	-	-	-	-	-	-	-	-	-	0.74	0.12
	Lespedeza cyrtobotrya	-	-	-	-	-	-	-	-	-	-	-	-	-	-	0.74	0.12
	Symplocos chinensis for. pilosa	-	-	-	-	-	-	-	-	-	-	-	-	-	-	0.74	0.12
	Corylus heterophylla	-	-	-	-	-	-	-	-	-	-	-	-	-	-	0.69	0.12
	Prunus sargentii	6.82	-	-	3.41	7.84	-	0.4	3.99	-	-	-	-	-	-	0.56	0.09
	Quercus aliena	2.8	-	-	1.4	3.26	-	-	1.63	3.05	1.4	-	1.99	-	-	-	-
	Rhododendron mucronulatum var. mucronulatum	-	1.3	6.89	1.58	-	-	3.39	0.57	-	-	1.16	0.19	-	-	-	-
	Prunus padus	-	-	-	-	-	-	-	-	-	-	8.5	1.42	-	-	-	-
	Symplocos chinensis for. pilosa	-	1.17	-	0.39	-	1.12	-	0.37	-	-	0.76	0.13	-	-	-	-
	Corylus heterophylla	-	-	1.12	0.19	-	-	0.37	0.06	-	-	-	-	-	-	-	-
	Smilax china	-	-	1.32	0.22	-	-	-	-	-	-	-	-	-	-	-	-
	E. hamiltonianus	-	-	-	-	-	1.22	-	0.41	-	-	-	-	-	-	-	-
	Euonymus alatus for. ciliatodentatus	-	-	-	-	-	-	-	-	-	-	0.7	0.12	-	-	-	-
	Lespedeza maximowiczii	-	-	-	-	-	-	-	-	-	-	0.85	0.14	-	-	-	-
The number of populatio		23	45	244	312	20	48	644	712	22	36	296	354	16	38	384	438
Amount of species(species)		21				24				21				25
Shannon’s species diversity index(H’)		1.1174				0.9306				1.0805				1.1295
Various species diversity indices(2016)		H’(Shannon)				J’(evenness)				D(dominance)				H’max
		1.1295				0.7983				0.2017				1.4150

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