• 研究论文 •

### 海南尖峰岭热带山地雨林不同空间尺度和径级水平的物种丰富度与个体密度关联

1. 1中国林业科学研究院热带林业研究所, 广州 510520
2中国林业科学研究院热带林业研究所试验站, 海南乐东 572542
• 收稿日期:2013-11-14 接受日期:2014-02-12 出版日期:2014-11-14 发布日期:2014-04-08
• 通讯作者: 李意德
• 作者简介:*(E-mail:liyide@126.com)
• 基金资助:
林业公益性行业科研专项“热带雨林生物多样性维持与自然恢复策略研究”(201104057);中央级公益性科研院所基本科研业务费专项“基于大样地系统的热带森林动态监测研究”(CAFYBB-2011004);国家自然科学青年基金(41201192);中央级公益性科研院所基本科研业务费专项“海南岛热带雨林动态监测大样地建立及监测”(RITFYWZX-200902);国家林业局“尖峰岭生态定位站运行补助”;科技部“海南尖峰岭森林生态系统重点野外科学观测研究站运行费”

### Associations between species richness and individual densities of varying spatial scales and diameter classifications in tropical montane rainforest in Jianfengling, Hainan Island, China

WU Yu-Peng1, XU Han1, LI Yi-De1,*(), LUO Tu-Shou1, CHEN De-Xiang1, LIN Ming-Xian2, YANG Huai2

1. 1Research Institute of Tropical Forestry, Chinese Academy of Forestry, Guangzhou 510520, China
2Experimental Station of Research Institute of Tropical Forestry, Chinese Academy of Forestry, Ledong, Hainan 572542, China
• Received:2013-11-14 Accepted:2014-02-12 Online:2014-11-14 Published:2014-04-08
• Contact: LI Yi-De

## 被引次数

6 | 1

Abstract:

Aims Our objective was to identify the degree of associations between species richness and individual densities of varying spatial scales and diameter classifications.
Methods Based on the dataset from a 60 hm2 tropical montane rainforest plot in Jianfengling, Hainan, China, the relationship between species richness and stem density was analyzed at seven spatial scales (5 m × 5 m, 10 m × 10 m, 20 m × 20 m, 40 m × 40 m, 60 m × 60 m, 80 m × 80 m, and 100 m × 100 m) and three DBH (diameter at breast height) classifications (DBH ≥ 1.0 cm, DBH ≥ 2.5 cm, DBH ≥ 7.5 cm).
Important findings The relationship between species richness and stem density varies with the spatial scales and DBH classifications. For all plants with DBH ≥ 1.0 cm, there are significantly positive correlations between species richness and stem density at the spatial scales of 5 m × 5 m, 10 m × 10 m, 20 m × 20 m and 40 m × 40 m, but not at other larger scales. The patterns are similar in the relationship between species richness and stem density after grouping all stems into the three DBH classifications, except there are weak correlations between species richness and stem density for plants with DBH ≥ 2.5 cm and DBH ≥ 7.5 cm at the scale of 60 m × 60 m. The significance levels of the relationship of species richness and stem density are similar between the DBH ≥ 2.5 cm and DBH ≥ 7.5 cm classifications, which are both higher than that of DBH ≥ 1.0 cm. It is concluded that the associations between species richness and stem density are stronger for individuals with larger DBH than those with smaller DBH. It is inferred that negative dependence and self-thinning are two possible mechanisms related to the phenomenon.