Spatial distribution patterns of old-growth forest of dioecious tree Torreya nucifera in rocky Gotjawal terrain of Jeju Island, South Korea

Table 1 Numbers, sex ratio and DBH of Torreya nucifera trees in the three sites of Torreya Forest in Jeju Island (adapted from Kang and Shin 2012)

Site	Plot ID	Altitude (m)	Area (ha)	Sex		Sex ratio	Density	Mean DBH (cm)
Site	Plot ID	Altitude (m)	Area (ha)	Males	Females	Sex ratio	Density	Mean DBH (cm)
I	3	148	6.4	235	167	0.58 ^**	62.8	58.9 ± 20.6
	4	154	1.5	16	11	0.59 ^NS	18.0	40.5 ± 20.6
	5	145	7.1	268	165	0.62 ^***	61.0	61.7 ± 19.4
Mean						0.60 ^***	57.5	59.7 ± 20.4
II	2	140	6.8	304	293	0.51 ^NS	87.8	54.2 ± 16.4
	6	144	5.3	194	200	0.49 ^NS	74.3	56.2 ± 15.9
	7	141	4.7	165	160	0.51 ^NS	69.2	45.0 ± 16.9
Mean						0.50 ^NS	78.3	52.5 ± 17.0
III	1	130	4.0	64	47	0.58 ^NS	27.8	46.2 ± 21.7
	8	129	1.3	23	64	0.26 ^***	66.9	57.0 ± 19.0
	9	128	1.3	18	21	0.46 ^NS	30.0	44.4 ± 17.1
	10	131	3.9	211	235	0.47 ^NS	114.7	39.4 ± 21.1
Mean						0.46 ^(*)	65.0	43.0 ± 21.5
Overall mean						0.52 ^*	67.6	52.4 ± 20.1

Sex ratio = male/(male + female); Density = trees/ha; DBH diameter at breast height
(*) P = 0.0510; * P < 0.05; ** P < 0.01; *** P < 0.0001; NS not significant

ISSN: 2288-1220