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作 者 ：苏文华

期 刊 ：云南植物研究 1997年 19卷 S9期 页码：1-3

关键词：西双版纳；热带季节雨林；乔木种群配置；

Keywords:Xishungbann,

摘 要 ：本文对西双版纳季节雨林“绒毛番龙眼、毗黎勒、泰国黄叶树群落”中乔木植物种群的配置进行了研究。结果表明：大多数林冠层和乔木中层种群的成年个体不多，没有优势种。林冠层种群的个体水平分布以随机形式为主，乔木下层种群以集群形式分布为主。同一种群在个体的不同生长发育阶段可能有不同的个体分布格局形式。从幼苗到成年，林冠层种群趋向于分布更均匀，乔木下层种群个体分布则趋向干更群集。乔木下层中的种类数及个体数最多，林冠层中种类及个体数最少；大多数种群为连续种群；群落具稳定的“J型”立木级结构。乔木植物种间关联程度较，尤其是林冠层种群间。群落内种间相对独立，但强烈排斥外来种。作者认为热带季节雨林中乔木植物有较高的生态位重叠，种间、种内个体间竞争剧烈。种群之间存在“间歇式竞争”，通过竞争与干扰的相互转换，使种群间在竞争与共存中达到平衡，既使种群中有少数个体能充分生长发育不断更新，又使群落维持较高的物种多样性。

Abstract:This paper studies the composition of tree population in Pometia tomentosa Communi-ty in Xishuangbanna. The result shows that there are a few adults in tree populations and no dom-inant species in the community. In tree populations.the spatial distribution of individuals is ran-dom and clustered. Most of populations at layer A are random distribution, but at layer C are clustered. The spatial pattern of juveniles and adults might be different. Adults tend to be more uniformly distrubited than expected from the models of their juveniles at layer A populations, but more clustered than juveniles at layer C of tree layer. Number of species and individuals is most at the lower layer, least layer A. Most of populations are continuous population types.

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