生物多样性 ›› 2021, Vol. 29 ›› Issue (4): 439-448.DOI: 10.17520/biods.2020399

• 研究报告: 植物多样性 • 上一篇    下一篇

格氏栲天然林林窗植物物种多样性与系统发育多样性

陈博1,2,3, 江蓝1,2,3, 谢子扬1,2,3, 李阳娣1, 李佳萱1, 李梦佳1,2,3, 魏晨思1,2,3, 邢聪1,2,3, 刘金福1,2,3, 何中声1,2,3,*()   

  1. 1 福建农林大学林学院, 福州 350002
    2 福建农林大学海峡自然保护区研究中心, 福州 350002
    3 生态与资源统计福建省高校重点实验室, 福州 350002
  • 收稿日期:2020-10-13 接受日期:2021-02-07 出版日期:2021-04-20 发布日期:2021-04-20
  • 通讯作者: 何中声
  • 基金资助:
    国家自然科学基金(31700550);国家自然科学基金(31770678);福建省自然科学基金(2019J01367);福建省林业科技推广项目(2018TG14-2);福建农林大学科技创新基金(CXZX2018125)

Taxonomic and phylogenetic diversity of plants in a Castanopsis kawakamiinatural forest

Bo Chen1,2,3, Lan Jiang1,2,3, Ziyang Xie1,2,3, Yangdi Li1, Jiaxuan Li1, Mengjia Li1,2,3, Chensi Wei1,2,3, Cong Xing1,2,3, Jinfu Liu1,2,3, Zhongsheng He1,2,3,*()   

  1. 1 College of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350002
    2 Cross-Strait Nature Reserve Research Center, Fujian Agriculture and Forestry University, Fuzhou 350002
    3 Key Laboratory of Fujian Universities for Ecology and Resource Statistics, Fuzhou 350002
  • Received:2020-10-13 Accepted:2021-02-07 Online:2021-04-20 Published:2021-04-20
  • Contact: Zhongsheng He
  • About author:* E-mail: jxhzs85@126.com

摘要:

林窗环境异质性导致群落物种多样性与系统发育多样性(phylogenetic diversity, PD)存在差异, 研究不同大小的林窗中群落的物种多样性与系统发育多样性有助于揭示林下生物多样性的形成及维持机制。本文以格氏栲(Castanopsis kawakamii)天然林为研究对象, 通过Pearson相关性分析与广义线性模型探讨了林窗内物种多样性与系统发育多样性间的相互关系及其环境影响因素。结果表明: (1)大林窗(面积 > 200 m2)植物种类及多度均高于中林窗(50 m2 ≤ 面积 < 100 m2)、小林窗(30 m2 ≤ 面积 < 50 m2)和非林窗(面积 = 100 m2)。大林窗群落系统发育结构趋于发散, 中、小林窗和非林窗群落系统发育结构受到生境过滤和竞争排斥综合作用。(2)群落系统发育多样性指数与物种丰富度(species richness, SR)、Margalef丰富度指数和Shannon-Wiener指数均呈显著正相关, 这与林窗内稀有种种类组成多于优势种有关。(3)林窗面积对物种多样性存在显著正效应; 土壤全氮含量对系统发育多样性和系统发育结构存在显著正效应。林窗形成提高了格氏栲天然林群落物种多样性和系统发育多样性, 林窗面积与土壤全氮共同驱动了格氏栲天然林林窗物种多样性和系统发育多样性的变化。

关键词: 格氏栲, 林窗, 物种多样性, 系统发育多样性, 环境因素

Abstract:

Aims: Environmental heterogeneity of forest gaps leads to variation in taxonomic and phylogenetic diversity of trees in these areas. Studying tree diversity in different sizes of forest gap communities can help to reveal the mechanisms that drive the formation and maintenance of biodiversity. This study took Castanopsis kawakamiigaps as the research object, and aimed to reveal the relationship between the taxonomic and phylogenetic diversity of plants and its environmental influence factors.

Methods: We examined different sizes of forest gaps in a Castanopsis kawakamii natural forest as to study the taxonomic and phylogenetic diversity of plants, and used a generalized linear model (GLM) to explore the environmental factors driving the community assembly.

Results: We found that the plant species and plant abundance in large gaps (> 200 m2) were higher than those of medium gaps ([50 m2, 100 m2)), small gaps ([30 m2, 50 m2)) and non-gaps (100 m2). The phylogenetic community structure of the large gaps tends to diverge, while that of the medium gaps, small gaps and non-gaps were affected by the combined effect of habitat filtering and competitive exclusion. The phylogenetic community diversity index (PD) was significantly positively correlated with species richness (SR), Margalef index and Shannon-Wiener index, which is related to the higher species composition of sparse species than dense species in forest gaps. Overall, forest gap size had a significantly positive effect on species diversity, and the soil total nitrogen content had a significantly positive effect on community phylogenetic diversity and phylogenetic structure.

Conclusion: The formation of forest gaps increase the taxonomic and phylogenetic diversity of trees in natural forests, with gap size and soil total nitrogen jointly driving tree diversity in these natural forest gaps.

Key words: Castanopsis kawakamii, forest gap, tree taxonomic diversity, phylogenetic diversity, environment factors