Niche differentiation of Dipterocarpaceae and Fagaceae-a study in Asian rain forest-

龙脑香科和壳斗科的生态位分化-亚洲雨林的研究-

基本信息

批准号：
08041155
负责人：
YAMAKURA Takuo
金额：
$ 6.98万
依托单位：
Osaka City University
依托单位国家：
日本
项目类别：
Grant-in-Aid for international Scientific Research
财政年份：
1996
资助国家：
日本
起止时间：
1996 至 1997
项目状态：
已结题

项目摘要

1. Research on Dipterocarpaceae at a tropical lowland rainforest of SarawakDistribution of 73 species and 9 subspecies of dipterocarps were analyzed in a 52 ha plot, and 73% of the examined species had distribution pattern depending on the topography. The fact suggest tht the topographical niche differentiation might contribute to enable the coexistence of dipterocarps in the plot. This analysis was also made for non-dipterocarp taxon, and same results were achieved. Canopy gap formation rate and recovery rate were estimated by using aerial photographs and by the land survey. There werer two types of gaps : one type was formed by the land slide associated with heavy rain and the other was formed by the tree falls. Two types of gap formation differed the frequency and recovery process and the various regeneration niches for the tree species were provided through two gap formation process. The contribution of the diversity of regeneration niche to the coexistence of tree species will be analyzed near future. Genetic analyzes were made for two species of genus Dryobalanops. Both of the species showed high genetic differentiation among the local populations located in 52 ha, indicating the high genetic diversity of the species. On the contrary, genetic distance between two sympatric species was quite small indicating niche differentiation and speciation of the two species had occurred recently.2. Research on Fagaceae at a montane rainforest of ThailandA research plot of 15 hapiot was established and the tree census in 7.5 ha area and identification in 3.0 ha area were completed. Gaps in 3.0 ha area was also mapped. Preliminary data analysis clarified that many Fagaceae species showed the distribution pattern associated with special topography or gaps. The niche differentiation among Fagaceae species will be analyzed qualitatively near future.

1。在52公顷的图中分析了73种种类的羊甲甲苯二氧化双杆科和73种二翼骨的sarawakdistripution的研究，其中73％的物种具有分布模式，取决于地形。事实表明，地形小众分化可能有助于使图中的双层核心共存。该分析也用于非二倍体分类单元，并实现了相同的结果。通过使用航拍照片和土地调查来估计冠层间隙形成率和恢复率。有两种类型的差距：一种类型是由与大雨相关的陆地滑梯形成的，另一种是由树瀑布形成的。两种类型的间隙形成不同，频率和恢复过程不同，通过两个间隙形成过程提供了树种的各种再生壁ni。再生利基对树种共存的多样性的贡献将在不久的将来分析。对两种dryobalanops属进行了遗传分析。这两个物种在52公顷的局部人群中均显示出很高的遗传分化，表明该物种的遗传多样性很高。相反，两个同胞物种之间的遗传距离很小，表明这两个物种的细分分化和物种形成发生了。2。建立了15个Hapiot的泰拉兰研究地块的山地雨林，并在7.5公顷区域建立了Fagaceae的研究，并完成了3.0公顷区域的鉴定。也绘制了3.0公顷区域的空白。初步数据分析阐明了许多Fagaceae物种显示出与特殊地形或差距相关的分布模式。 Fagaceae物种之间的利基分化将在质量上进行质量分析。