Table 6.
Change of plant cluster structure in Plot 3 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 mongolica	74.21	8.5	13.57	42.2	73.01	-	2.32	36.89	72.93	-	-	36.47	60.32	-	4.37	30.89
	Styrax japonicus	-	52.34	6.86	18.59	-	58.5	2.83	19.97	-	56.47	13.42	21.06	-	46.7	12.11	17.59
	Sorbus alnifolia	8.98	18.19	19.98	13.88	9.96	19.86	17.58	14.53	10.24	19.98	24.26	15.82	13.4	28.4	5.13	17.02
	Kalopanax septemlobus	10.25	-	-	5.13	10.44	-	-	5.22	10.24	-	-	5.12	17.66	-	-	8.83
	Acer pseudosieboldianum	-	20.97	22.45	10.73	-	21.64	24.78	11.34	-	23.55	12.08	9.86	-	22.5	3.85	8.14
	Fraxinus rhynchophylla	6.56	-	2.07	3.63	6.59	-	2.4	3.7	6.59	-	1.3	3.51	8.63	-	4.31	5.03
	Stephanandra incisa var. incisa	-	-	4.24	0.71	-	-	3.55	0.59	-	-	1.93	0.32	-	-	14.5	2.42
	Parthenocissus teicuspidata	-	-	-	-	-	-	-	-	-	-	4.2	0.7	-	-	9.95	1.66
	Viburnum erosum	-	-	19.46	3.24	-	-	33.59	5.6	-	-	29.69	4.95	-	-	9.6	1.6
	Ailanthus altissima	-	-	-	-	-	-	-	-	-	-	-	-	-	2.4	4.2	1.5
	Carllicarpa japonica	-	-	3.37	0.56	-	-	4.76	0.79	-	-	5.69	0.95	-	-	4.23	0.71
	Acer palmatum	-	-	-	-	-	-	-	-	-	-	-	-	-	-	4.2	0.7
	R. chinensis	-	-	-	-	-	-	-	-	-	-	-	-	-	-	3.9	0.65
	Euonymus alatus for. ciliatodentatus	-	-	-	-	-	-	-	-	-	-	-	-	-	-	3.13	0.52
	Aralia elata	-	-	-	-	-	-	-	-	-	-	-	-	-	-	3.13	0.52
	Lespedeza maximowiczii	-	-	-	-	-	-	-	-	-	-	-	-	-	-	3.03	0.51
	Ligustrum obtusifolium	-	-	-	-	-	-	-	-	-	-	-	-	-	-	2.47	0.41
	Prunus sargentii	-	-	0.94	0.16	-	-	1.16	0.19	-	-	-	-	-	-	1.81	0.3
	Robinia pseudoacacia	-	-	-	-	-	-	-	-	-	-	-	-	-	-	1.12	0.19
	Rhododendron yedoense	-	-	-	-	-	-	-	-	-	-	-	-	-	-	1.11	0.19
	Euonymus oxyphyllus	-	-	-	-	-	-	-	-	-	-	1.54	0.26	-	-	1.04	0.17
	Rubus crataegifolius	-	-	-	-	-	-	-	-	-	-	-	-	-	-	0.7	0.12
	Pueraria montana var. lobata	-	-	-	-	-	-	-	-	-	-	-	-	-	-	0.7	0.12
	Zanthoxylum piperitum	-	-	-	-	-	-	-	-	-	-	-	-	-	-	0.74	0.12
	Tetradium daniellii	-	-	-	-	-	-	-	-	-	-	-	-	-	-	0.72	0.12
	Maackia amurensis	-	-	2.25	0.38	-	-	-	-	-	-	-	-	-	-	-	-
	Rhododendron mucronulatum var. mucronulatum	-	-	3.43	0.57	-	-	7.03	1.17	-	-	4.6	0.77	-	-	-	-
	Rhododendron schlippenbachii	-	-	1.38	0.23	-	-	-	-	-	-	-	-	-	-	-	-
	Lespedeza cyrtobotrya	-	-	-	-	-	-	-	-	-	-	1.3	0.22	-	-	-	-
The number of populatio		18	25	252	295	18	23	176	217	18	22	164	204	11	22	292	325
Amount of species(species)		13				11				13				25
Shannon’s species diversity index(H’)		0.8911				0.8485				0.8892				1.2378
Various species diversity indices(2016)		H’(Shannon)				J’(evenness)				D(dominance)				H’max
		1.2378				0.8854				0.1146				1.3979

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