尖峰岭热带山地雨林海南特有木本植物群落结构
收稿日期: 2012-02-14
录用日期: 2012-04-25
网络出版日期: 2012-09-06
Community structure of endemic woody plants in tropical montane rainforest of Jianfengling, Hainan Island, China
Received date: 2012-02-14
Accepted date: 2012-04-25
Online published: 2012-09-06
以海南尖峰岭4.8 hm 2的热带山地雨林原始林为研究对象, 分析了群落内海南特有乔、灌木植物(以下简称特有种)的物种组成、特有种种群的多度和径级结构特点, 分析了保留和剔除特有种对群落物种多样性指数的影响。结果表明, 在4.8 hm 2样地中, 共记录了胸径≥1.0 cm的个体36481株, 隶属于65科134属247种; 其中, 24种为特有种, 占样地内总种数的9.7%; 大多数特有种多度较小, 在群落发展中居从属地位。多数特有种对生境具有选择性, 分布区域相对狭窄, 种实以动物传播型为主。剔除特有种后, 导致群落的Margalef丰富度指数和Shannon-Wiener多样性指数极显著下降(p < 0.01), 对Simpson和Pielou均匀度指数影响不显著。由此可见, 特有种不仅对维持尖峰岭山地热带山地雨林的物种多样性具有重要的意义, 也具有较高的科学研究价值。
盛大勇, 庄雪影, 许涵, 李意德, 胡跃华, 时雷雷, 骆土寿, 陈德祥, 林明献 . 尖峰岭热带山地雨林海南特有木本植物群落结构[J]. 植物生态学报, 2012 , 36(9) : 935 -947 . DOI: 10.3724/SP.J.1258.2012.00935
Aims Our objective was to understand the endemic woody species and their distribution, population structure, and roles in maintaining the biodiversity of the montane rain forest of Hainan, China.
Methods We surveyed a 4.8 hm 2 permanent plot in the primary montane rain forest of Jianfengling, Hainan and analyzed the species composition, importance value, abundance, and size-class distribution of the community. ANOVA was used to evaluate differences in three diversity indices before and after removing the endemic species.
Important findings A total of 36481 woody plants with diameter at breast height (DBH) ≥1.0 cm were recorded. They belong to 65 families, 134 genera, and 247 species. Of these, 24 tree and shrub species are endemic to Hainan Island, comprising 9.7% of the total number of trees in the plot. Most of the endemic species have small abundance and sparse distribution, having minor status in the community composition. Most endemic species had preference to specific habitats, narrow distributions, and their seeds were dispersed mainly by animals. The Margalef and Shannon-Wiener indices declined significantly (p < 0.01) after removing the endemic species, but the Simpson and Pielou indices showed no significant differences. Despite their minor roles in the community, the endemic species are important in maintaining the floristic diversity of the tropical montane rainforest. They are of value for scientific research and conservation.
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