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Role and Status of Pioneer Species in the Dynamics of the Mixed Dipterocarp Forests

先锋物种在龙脑香混交林动态中的作用和地位

基本信息

批准号：
02041071
负责人：
YAMAKURA Takuo
金额：
$ 8.64万
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：
1990
资助国家：
日本
起止时间：
1990 至 1991
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-02041071/
关键词：
Mixed Dipterocarp Forest community Species Diversity Community Structure Community Dynamics Pioneer Life Strategy South-east Asia

项目摘要

Mixed dipterocarp forest is a symbol of wild nature in Asian tropics and is characterized by the great species diversity, tall architecture, and big local variations within the forest. Major professionals in tropical forest researches in the world become aware of the necessity of the long-term ecological research of the forests by establishing the large ecological plots with sizes such as 50 ha, for understanding the forests as they really are. This research project was carried out as a preparation for the long-term and large scale ecological research of the mixed dipterocarp forest in Sarawak through the following activities : 1) the establishment of the 50 ha plot, 2) mapping, forest inventory, and herbarium collection of living trees with DBHs over 1.0 cm, 3) the analysis of species diversity, forest structure, and community dynamics, 4) the comparison of life strategies among pioneer tree species, and 5) synthetic and ecological discussions about the role and status of pioneer species in the dynamics of mixed dipterocarp forest.To demarcate the 50 ha plot with a reliable accuracy, we used an electronic tacheometer. The closure error of the plot was 1.0 m in forest survey. The plot was very complex in topography and included various habitats for plants. The 10 ha forest inventory was done during two year research activities. Pioneer species is short lived and grew faster than climax species, depended their regeneration on canopy gaps, had not effective anti-herbivory substances in leaves, and adopted seed bank strategy using toxic seed coat substances.

龙脑香混交林是亚洲热带野生自然的象征，具有物种多样性高、结构高大、林内局部变异大等特点。世界热带森林研究的主要专业人员认识到对森林进行长期生态研究的必要性，建立了50公顷的大型生态样地，以了解森林的真实情况。本研究项目是为沙捞越龙脑香混交林的长期和大规模生态研究做准备，通过以下活动进行：1）建立50公顷样地; 2）调查、调查和收集胸径大于1.0 cm的活木标本; 3）分析物种多样性、森林结构和群落动态;（4）先锋树种的生活策略比较;（5）先锋树种在龙脑香混交林动态中的作用和地位的综合生态学讨论。森林调查样地闭合差为1.0m。这片土地的地形非常复杂，包括各种植物的栖息地。10公顷的森林清查是在两年的研究活动中完成的。先锋种寿命短，生长快于顶极种，更新依赖于林隙，叶片中无有效的抗草食性物质，种子库策略采用有毒种皮物质。