Fig. 1From: Spatial distribution patterns of old-growth forest of dioecious tree Torreya nucifera in rocky Gotjawal terrain of Jeju Island, South Korea a Location of Torreya Forest in Jeju Island, South Korea. b The 11 plots divided by trails (Lee 2009) were categorized into three sites depending on the sex ratio and DBH gradient by Kang and Shin (2012): Site I in the southern part of the forest including plots 3–5, Site II in the middle part including plots 2–7, and Site III in the northern part including plots 1, 8, 9, and 10Back to article page