| 摘要: |
| 为探讨两广梭罗树(Reevesia thyrsoidea)种群的空间格局及种内关联特征,在防城季节性雨林设置1 hm2样地,采用单变量函数g(r)和双变量函数K12(r)分析种群的空间分布格局和不同发育阶段个体群的空间关联性。结果显示:两广梭罗树种群的小龄级个体数量较多,种群径级结构呈金字塔型,种群处于增长状态；在多数尺度上,两广梭罗树种群整体以及幼树、小树和成树个体群趋于集群分布；幼树、小树和成树个体群之间空间分布呈现显著的正关联；两广梭罗树种群幼龄个体充足,具有良好的更新潜能,成年个体对幼龄个体没有明显的抑制作用；通过个体聚集和种内庇护的方式,两广梭罗树种群在群落中具有较强的竞争能力,并占据着有利的生态位。这些结果表明,两广梭罗树种群目前的生存状况受密度制约因素影响较小,呈现增长的趋势。 |
| 关键词: 两广梭罗树 空间格局 种内关联 季节性雨林 |
| DOI： |
| 投稿时间：2024-03-07修订日期：2024-04-04 |
| 基金项目:广西自然科学(2022GXNSFAA035600)；中央财政林业改革发展资金项目(GXZ2022-C3-002212-YZLZ)；2023年度广西大学生创新创业训练计划项目(S202310602177) |
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| Studies on spatial distribution pattern and intraspecific association of Reevesia thyrsoidea population in Fangcheng seasonal rainforest |
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zuojing1, chenshandong2, yangfengqin2, liwuzheng1, qinyi1, liaonanyan1, yangting1, liangshichu2
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| (1.Guangxi Fangcheng Golden Camellia National Nature Reserve Management Center;2.College of Life Science, Guangxi Normal University) |
| Abstract: |
| s: To explore the spatial distribution pattern and intraspecific association of Reevesia thyrsoidea population, a 1-hm2 plot was established in the seasonal rainforest of Fangcheng, and the univariate function g(r) and bivariate function K12(r) were used to analyze the spatial distribution pattern of the population and the spatial association of individual groups at different development stages. The results showed that Reevesia thyrsoidea population has more young individuals, present pyramidal diameter class structure, and is increasing. At most scales, Reevesia thyrsoidea population itself as well as individual groups of saplings, young trees, and adult trees tend to clump.There is a significant positive association in spatial distribution between individual groups of sapling, young trees, and adult trees.The young individuals of Reevesia thyrsoidea population are abundant and have good regeneration potential. Adult individuals have no significant inhibitory effect on young individuals.Through individual aggregation and intraspecies protection, Reevesia thyrsoidea population have strong competitiveness in the community and occupy favorable ecological niches.These results indicate that the current survival status of Reevesia thyrsoidea population is less affected by density constraints and shows an increasing trend. |
| Key words: Reevesia thyrsoidea Spatial pattern intraspecific association seasonal rainforest |
