植物生态学报 ›› 2020, Vol. 44 ›› Issue (10): 1007-1014.DOI: 10.17521/cjpe.2020.0174

• 研究论文 • 上一篇    下一篇

中国亚热带森林动态监测样地常绿和落叶木本被子植物谱系结构及生态习性差异

车俭1,3, 郑洁1,3, 蒋娅3, 金毅1,3,*(), 乙引1,2,*()   

  1. 1西南喀斯特山地生物多样性保护国家林业和草原局重点实验室, 贵州师范大学, 贵阳 550025
    2贵州省植物生理与发育调控重点实验室, 贵州师范大学, 贵阳 550025
    3贵州师范大学生命科学学院, 贵阳 550025
  • 收稿日期:2020-05-29 接受日期:2020-08-10 出版日期:2020-10-20 发布日期:2020-10-11
  • 通讯作者: 金毅,乙引
  • 作者简介:Yi Y: gzklppdr@gznu.edu.cn
    *金毅:ORCID: 0000-0003-4961-5172 Jin Y:codon@126.com;
  • 基金资助:
    国家自然科学基金委员会-贵州省人民政府喀斯特科学研究中心项目(U1812401);贵州省科学技术基金(黔科合基础[2020]1Z013)

Separation of phylogeny and ecological behaviors between evergreen and deciduous woody angiosperms in the subtropical forest dynamics plots of China

CHE Jian1,3, ZHENG Jie1,3, JIANG Ya3, JIN Yi1,3,*(), YI Yin1,2,*()   

  1. 1Key Laboratory of National Forestry and Grassland Administration on Biodiversity Conservation in Karst Mountainous Areas of Southwestern China, Guizhou Normal University, Guiyang 550025, China
    2Key Laboratory of Plant Physiology and Developmental Regulation of Guizhou Province, Guizhou Normal University, Guiyang 550025, China
    3School of Life Sciences, Guizhou Normal University, Guiyang 550025, China
  • Received:2020-05-29 Accepted:2020-08-10 Online:2020-10-20 Published:2020-10-11
  • Contact: JIN Yi,YI Yin
  • Supported by:
    Joint Fund of the National Natural Science Foundation of China and the Karst Science Research Center of Guizhou Province(U1812401);Natural Science and Technology Foundation of Guizhou Province(黔科合基础[2020]1Z013)

摘要:

常绿和落叶木本被子植物是组成东亚地区亚热带阔叶林的两个主要植物类群。探索常绿和落叶木本被子植物的生态位差异, 对于推测亚热带阔叶林群落的生物多样性维持机制, 具有重要意义。该研究采用线性回归模型和Mantel检验多元回归等统计手段, 分析了中国亚热带地区8个森林动态监测样地的常绿和落叶木本被子植物谱系和生态习性差异。主要结果: (1)该研究的788个被子植物分类单元的叶习性(常绿和落叶)具有一定的谱系保守性。常绿和落叶植物对光照、温度、水分、土壤反应和土壤肥力因子的生态习性均有差异, 表现为常绿植物偏好较低的光照和土壤pH, 以及较高的温度、水分和土壤肥力; 落叶植物则相反。(2)样地内落叶较常绿植物的种间谱系散布更收敛, 但生态习性散布更发散; 样地间落叶较常绿类群的谱系组成差异更小, 但生态习性差异更大; 样地间落叶类群的谱系组成差异随年平均气温差异的增大而增大。(3)落叶/常绿植物物种数量的比例随年平均气温升高而降低, 而旱季持续时间和年降水量等因子的影响不明显。该研究证实了我国亚热带地区8个森林动态监测样地内的常绿和落叶木本被子植物在谱系和生态习性上均存在巨大差异, 生态位分化在很大程度上是促进亚热带阔叶林群落内生物多样性维持的重要机制。

关键词: 叶习性, 生态位, 生物多样性, 亚热带森林, 中国森林生物多样性监测网络

Abstract:

Aims Evergreen (EBL) and deciduous broad-leaved (DBL) woody angiosperms are two major plant groups in the subtropical broad-leaved forests of eastern Asia. Exploring the separation between these two groups in ecological niche, will shed light on the biodiversity maintenance mechanisms of subtropical broad-leaved forests.
Methods Adopting statistical methods including the linear regression model and the multiple regression method of Mantel test, we compared the phylogeny and ecological behaviors of the two plant groups in eight forest dynamics plots in China.
Important findings We found that (1) leaf habit, be either EBL or DBL, was phylogenetically conserved in the 788 study angiosperm taxa. EBLs and DBLs differed in ecological behaviors towards light, temperature, water, soil reaction and soil fertility. EBLs prefer low light and soil pH, high temperature, water and soil fertility; while the opposite was true for DBLs. (2) Within plot, DBLs were more clustered in phylogenetic dispersion, but more overdispersed in ecological behavior, compared with EBLs; similarly, between plots, DBLs were less diverse in phylogenetic composition, but more diverse in ecological behaviors, than EBLs. On the other hand, divergence in phylogenetic composition of DBLs between plots increased with difference in mean annual temperature (MAT). Further, we found that (3) the ratio of DBLs to EBLs in species richness decreased with MAT increased, but not with dry season length or annual precipitation. The findings show that EBLs and DBLs of the eight study plots differ in both phylogeny and ecological behaviors, and imply that niche separation may be a major mechanism that maintains the biodiversity of subtropical broad-leaved forests.

Key words: leaf habit, ecological niche, biodiversity, subtropical forest, Chinese Forest Biodiversity Monitoring Network