生物多样性 ›› 2024, Vol. 32 ›› Issue (12): 24284.  DOI: 10.17520/biods.2024284  cstr: 32101.14.biods.2024284

• 研究报告 • 上一篇    下一篇

北京东灵山暖温带落叶阔叶林幼树及成树生产力的影响因素

杜晴晴1,2,3(), 任思远4, Nicole Tsz Shun Yuan5, 祝燕1,2,*()()   

  1. 1.中国科学院植物研究所植被与环境变化重点实验室, 北京 100093
    2.国家植物园, 北京 100093
    3.中国科学院大学生命科学学院, 北京 101408
    4.中国自然资源航空物探遥感中心, 北京 100083
    5. Campus of Tsinghua University High School, Beijing 100084
  • 收稿日期:2024-07-01 接受日期:2024-12-15 出版日期:2024-12-20 发布日期:2025-01-24
  • 通讯作者: E-mail: zhuyan@ibcas.ac.cn
  • 基金资助:
    国家自然科学基金(32271614);国家自然科学基金(31870408);中国科学院战略生物资源计划和中国科学院植被与环境变化国家重点实验室资助项目(Y7206F1016)

Factors affecting the productivity of sapling and adult trees in the warm temperate deciduous broad-leaved forest of Donglingshan, Beijing

Qingqing Du1,2,3(), Siyuan Ren4, Nicole Tsz Shun Yuan5, Yan Zhu1,2,*()()   

  1. 1. Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
    2. China National Botanical Garden, Beijing 100093, China
    3. College of Life Science, University of Chinese Academy of Sciences, Beijing 101408, China
    4. China Aero Geophysical Survey and Remote Sensing Center for Natural Resources, Beijing 100083, China
    5. Campus of Tsinghua University High School, Beijing 100084, China
  • Received:2024-07-01 Accepted:2024-12-15 Online:2024-12-20 Published:2025-01-24
  • Contact: E-mail: zhuyan@ibcas.ac.cn
  • Supported by:
    National Natural Science Foundation of China(32271614);National Natural Science Foundation of China(31870408);Biological Resources Programme, Chinese Academy of Sciences and the State Key Laboratory of Vegetation and Environmental Change, Chinese Academy of Sciences(Y7206F1016)

摘要: 研究森林生产力对提升森林生态系统功能具有重要意义, 然而现有研究一般关注森林中树木的总体生产力, 对幼树、成树生产力的关注较少, 且较少探讨物种多样性和群落结构等因素对幼树、成树生产力的影响。本研究基于东灵山暖温带落叶阔叶林20 ha动态监测样地调查数据, 计算了物种丰富度、胸径变异系数和土壤养分等指数, 采用回归分析和结构方程模型分析, 分别探讨上述因素对总体、幼树和成树生产力的影响。结果表明, 树木的总体生产力受到总体初始生物量、总体物种丰富度和土壤养分显著的正影响, 受到胸径变异系数显著的负影响; 幼树生产力受到幼树初始生物量、幼树物种丰富度和胸径变异系数显著的正影响, 总体物种丰富度和土壤养分的影响不显著, 但随着土壤养分增加, 幼树物种丰富度对幼树生产力有显著正影响; 成树生产力受到成树初始生物量、总体物种丰富度和土壤养分显著的正影响, 受到胸径变异系数显著的负影响, 成树物种多样性的影响不显著, 但随着土壤养分增加, 成树物种丰富度对成树生产力有显著负影响。各个因素对成树生产力的影响作用与总体树木类似, 而在幼树中有所不同, 生态位互补效应假说和植被数量假说很好地解释了森林生产力的提高。本研究为森林中不同生活史阶段树木的科学经营管理提供了理论依据, 对暖温带次生林的森林抚育具有重要意义。

关键词: 物种多样性, 群落结构, 土壤养分, 生产力, 生活史阶段

Abstract

Aim: Research on forest productivity is of great significance for improving forest ecosystem function. However, most studies focus on the productivity of total trees in forests, with relatively little research on the productivity of sapling trees and adult trees, and rarely discuss the effects of species diversity and community structure on the productivity of sapling trees and adult trees.

Methods: This study is based on tree inventory data collected from 20 ha Donglingshan warm temperate deciduous broad-leaf forest plot. Species richness, coefficient of variation in diameter at breast height (DBHcv), and soil nutrients were calculated. We utilized regression models and structural equation models to examine the effects of these factors on productivity of total trees, sapling trees, and adult trees.

Results: For productivity of total trees, initial biomass of total trees, total tree species richness, and soil nutrients had significant positive effects, while DBHcv had a significant negative effect. For productivity of sapling trees, initial biomass of sapling trees, sapling tree species richness, and DBHcv had significant positive effects, while total tree species richness and soil nutrients had no significant impact. As soil nutrients increased, sapling tree species richness had a significant positive effect on productivity. For productivity of adult trees, initial biomass of adult trees, total tree species richness, and soil nutrients had significant positive effects, while DBHcv had a significant negative effect and adult tree species richness had no significant effect. As soil nutrients increased, adult tree species richness had a significant negative effect on productivity. The effects of species diversity, community structure and soil nutrients on productivity of adult trees were similar to those on productivity of total trees, but different in sapling trees.

Conclusion: Our study demonstrates that the effects of species diversity, community structure, and soil nutrients on productivity of trees vary across different life history stages. Both the niche complementarity effect hypothesis and the vegetation quantity hypothesis can well explain the increase of forest productivity. This study provides a theoretical basis for the management practices of trees in different life history stages and will have important implications for forest tending in warm temperate secondary forests.

Key words: species diversity, community structure, soil nutrients, productivity, life history stages