| 摘要: |
| 基于功能性状探讨物种共存机制,已成为近年来群落生态学研究的热点内容。为探讨群落垂直结构构建的成因,该研究以昆明筇竹寺地区的半湿润常绿阔叶林为对象,调查乔木层、灌木层及草本层不同层次间植物叶片的功能性状。结果表明:(1)植物各功能性状均存在不同程度的随层次变化的趋势。(2)按照植物的生活型将元江锥群落分为乔木、灌木以及草本3层,与功能性状的聚类结果基本一致。(3)乔木、灌木和草本3个层次的S.E.S PW值均小于0,可知群落内物种的功能性状结构均呈现显著的发散。综上结果认为,植物群落不同物种的叶片功能特征对群落垂直方向上不同光照和水分条件组合的适应是群落垂直结构构成的主要影响因素,支持生境过滤是群落垂直结构构建的主要生态过程; 在不同层次内的物种具有不同的功能性状,同一层次内通过竞争排斥加大物种多样性; 群落垂直结构的形成是群落内垂直方向上环境因子发生变化的结果,对资源有不同需求的物种分布在不同空间高度上,群落垂直结构则是对资源的有效利用,增加了群落内物种多样性。 |
| 关键词: 群落垂直结构, 群落构建, 群落功能性状结构, 生境过滤, 竞争排斥 |
| DOI：10.11931/guihaia.gxzw202011043 |
| 分类号:Q948.15 |
| 文章编号:1000-3142(2022)06-1040-09 |
| Fund project:国家自然科学基金(31770450)[Supported by National Natural Science Foundation of China(31770450)]。 |
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| A preliminary study on construction mechanism of vertical structure in Castanopsis orthacantha community |
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FU Jingyuan1,2, ZHANG Qian2,3, SU Wenhua1*
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1. College of Ecology and Environmental Sciences, Yunnan University, Kunming 650500, China;2. Key Laboratory of Tropical
Forest Ecology, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Menglun 666303, Yunnan,
China;3. 3. University of Chinese Academy of Sciences, Beijing 100049, China
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| Abstract: |
| Exploring the mechanism of species coexistence based on functional traits has become a hot topic of community ecology in recent years. This study was aimed to understand the reasons for the establishment of the vertical structure, and to investigate the functional traits of plant leaves at different layers of the semi-humid evergreen broad-leaf forest in Qiongzhu Temple, Kunming. The results were as follows:(1)All plant functional traits showed varying degrees of trends at different layers.(2)The Castanopsis orthacantha community was divided into three layers according to plant life forms, i.e. tree, shrub, and herb, which were consistent with the clustering results of functional traits.(3)The S.E.S PW values at the tree, shrub and herb layers were all < 0, indicating that the functional structure in the community exhibited a significant divergence. In summary, the adaptation of leaf functional traits of different species in plant communities to different combinations of light and water conditions in the vertical direction of the community, was the main influence on the establishment of the vertical structure, which supporting habitat filtering is the main ecological process in the establishment of the vertical structure. Species at different layers had different functional traits, and the species diversity at the same layer increased through the varying degrees of competitive exclusion. The formation of community vertical structure was the result of changes in environmental factors in the vertical direction within the community; species with different needs for resources were distributed at different heights, and vertical structure was an effective use of resources, and increased species diversity within the community. |
| Key words: community vertical structure, community construction, community functional trait structure, habitat filtering, competitive exclusion |
