不同时间尺度森林群落多样性-稳定性关系  

Diversity-Stability Relationships in Forest Communities Across Different Temporal Scales

作　　者：贾勃 王新杰[1] JIA Bo;WANG Xinjie(Beijing Forestry University,College of Forestry,Beijing 100083,China)

机构地区：[1]北京林业大学林木资源高效生产全国重点实验室,北京100083

出　　处：《西北林学院学报》2025年第1期144-151,共8页Journal of Northwest Forestry University

基　　金：国家林业和草原局项目资金(JYC2019-107)。

摘　　要：森林群落稳定性是体现森林面对干扰抵抗能力的重要指标,已知森林生物量稳定性会受到多样性、物种异步性和优势物种稳定性的影响,然而,关于这些变量在不同时间尺度下的相对重要性的相关研究较少,本文旨在探索不同时间尺度下森林群落稳定性影响因素。基于吉林省金沟岭林场的110块固定样地数据,本文利用相关性分析研究不同时间尺度下多样性、优势物种稳定性、物种异步性和森林群落生物量稳定性的相关关系是否一致,接着采用结构方程模型计算直接效应和总效应。结果表明,物种丰富度、胸径变异系数、物种异步性与稳定性总是呈显著正相关关系。随着时间尺度的增大,物种异步性的直接效应由0.44增长为0.63,总相对效应由36.87%增长为45.57%,物种异步性一直是影响森林生物量时间稳定性的最重要因素。本研究得出影响群落稳定性的最重要因素,有助于更好地理解森林生态系统多样性-稳定性关系的机制,然而多样性-稳定性关系及其机制是复杂的,未来仍需要选择不同多样性指标进行深入研究。Forest community stability is an important indicator of a forest's ability to resist disturbance.It is known that the stability of forest biomass would be influenced by diversity,species asynchrony,and dominant species stability.However,there are few studies on the relative importance of these factors at different temporal scales.This study aims to explore the factors affecting the stability of forest community at different temporal scales.Based on the data from 110 fixed plots in the Jingouling Forest Farm in Jilin Province,this study investigated whether the correlations between diversity,dominance stability,species asynchrony,and forest community biomass stability remain consistent at different temporal scales using correlation analysis.Then,structural equation models were employed to analyze the direct and total effects.The results showed that species richness,diameter at breast height coefficient of variation,and species asynchrony were consistently and positively correlated with stability.As the temporal scale increased,the direct effect of species asynchrony increased from 0.44 to 0.63,and the total relative effect increased from 36.87%to 45.57%,species asynchrony has consistently been the most important factor affecting the temporal stability of forest biomass.This study explored the most important factor affecting community stability,which helps to better understand the mechanisms of the diversity-stability relationship in forest ecosystems.However,the diversity-stability relationship and its mechanisms are complex,and it is necessary to further investigate using different diversity indicators in the future.

关 键 词：多样性-稳定性关系 时间尺度 物种异步性 结构方程模型 

分 类 号：S718.5[农业科学—林学]