西スマトラ州の熱帯多雨林における極相種のCalophyllum cf. soulattri の更新過程
西スマトラ州の熱帯多雨林における極相種のCalophyllum cf. soulattri の更新過程
复制标题
西苏门答腊岛热带雨林极地物种Calophyllum cf.的再生过程
作者：
Erizal Mukhtar;英治 鈴木;隆司 甲山;Marlis Rahman
红厚壳属Calophyllum cf.苏拉特里山（Guttiferae）进行了调查，在两个地块设置在热带雨林，巴塘，西苏门答腊。在高50-60 m的成熟斑块覆盖的平样地（1.0hm2）中，发现4株杉木母树。参见soulattri（身高27-39米）和2，722名少年（0-9米）。在1981 ~ 1989年的调查期间，母树仅在1981年结果，而不是幼苗丰富。他们似乎把果实散布在整个地块上。1981 ~ 1989年，在14 m ~ 2的母树旁小区内，成活率为30-38%，年高生长量为2.5cm。较大的少年（4-9米）更经常发生在除了母树的区域。Gaja样地（0.86ha）林隙比Pin样地多，仅31株。参见soulattri存在，其高度为0.7-17 m。1)只有古树和大树才能繁殖，繁殖体扩散范围广; 2）扩散的繁殖体能在母树周围存活; 3）成熟后剩余寿命短，在子代开始繁殖前死亡。这些特征将形成两种类型斑块的镶嵌图：一种由母树、幼苗和幼树组成，另一种由幼杆组成。斑块大小与扩散面积有关。因此，植物种群连续存在于同一地区，而零星的繁殖事件创造了马赛克模式。
All individuals of Calophyllum cf. soulattri Burm. (Guttiferae) were surveyed in two plots set in a tropical rain forest, Padang, West Sumatra. In Pin plot (1.0 ha) covered mostly by mature patch of 50-60 m in height, we found four mother trees of C. cf. soulattri (27-39 m in height), and 2,722 juveniles (0-9 m). Instead of the seedling abundance, the mother trees made fruits only in 1981 during the survey period from 1981 to 1989. They seemed to disperse fruits in the whole area of plot. The seedlings and saplings in a subplot of 14 m2 adjacent to a mother tree, 30-38% of them survived from 1981 to 1989 and grew 2.5 cm/yr in height. Bigger juveniles (4-9 m) occurred more often in area apart from mother trees. In Gaja plot (0.86 ha) having more gaps than Pin Plot, only 31 C. cf. soulattri existed, which were 0.7-17 m in height.The following regeneration characteristics are supposed for this species. 1) Only old and big tree can reproduce, and the dispersal area of propagule is wide; 2) the dispersed propagule can survive around the mother trees; 3) the residual life span after maturation is short, and die before offsprings start reproduction. These characteristics will make a mosaic of two types of patches: one composed of mother tree, seedlings and saplings, and the other of young poles. The patch size will be related to dispersal area. Thus the plant population exists continuously in the same area, while sporadic reproduction events create the mosaic pattern.