北京东灵山暖温带落叶阔叶林群落生物多样性与地上生物量的关系  

Relationship between biodiversity and aboveground biomass in the warmtemperate deciduous broad-leaved forest of Donglingshan,Beijing

作　　者：王兴煜 孟京辉[1] 任思远 祝燕[2] Xingyu Wang;Jinghui Meng;Siyuan Ren;Yan Zhu(College of Forestry,Beijing Forestry University,Beijing 100083,China;Key Laboratory of Vegetation and Environmental Change,Institute of Botany,Chinese Academy of Sciences,Beijing 100093,China;China Aero Geophysical Survey and Remote Sensing Center for Natural Resources,Beijing 100083,China)

机构地区：[1]北京林业大学林学院,北京100083 [2]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 [3]中国自然资源航空物探遥感中心,北京100083

出　　处：《生物多样性》2024年第12期82-95,共14页Biodiversity Science

基　　金：国家自然科学基金(32271614,31870408);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)。

摘　　要：森林生物多样性–地上生物量关系在全球物种丧失加剧的背景下备受关注。但目前的研究主要聚焦在单一方面的多样性,鲜少同时探究物种、功能和结构三个方面的多样性,生物多样性哪方面更能影响地上生物量变化尚不清楚。本研究基于北京东灵山1ha次生林样地清查数据,使用线性回归模型分析了物种多样性、功能多样性、结构多样性和生物因素(林分密度)、非生物因素(地形)与地上生物量的相关性,并通过结构方程模型综合比较物种、功能和结构多样性对地上生物量影响的相对重要性。结果表明:(1)多元回归结果表明Pielou均匀度指数、比叶面积群落加权平均值、胸径Shannon指数和林分密度对地上生物量有显著正影响,而功能离散度和海拔对地上生物量有显著负影响。(2)结构方程结果表明,林分密度和以胸径Shannon指数为主的结构多样性对地上生物量的总效应最大,其次是海拔、物种多样性(Pielou均匀度指数)、功能多样性(功能离散度和比叶面积群落加权平均值)。研究认为生态位互补和质量比假说共同解释暖温带落叶阔叶林地上生物量,其中林分密度和胸径Shannon指数导致的生态位互补效应起主导作用。研究结果为解释生物多样性–生态系统功能关系提供了有力支撑,为暖温带森林的可持续经营和管理提供了理论依据,具有重要的现实意义。Aims:The relationship between biodiversity and aboveground biomass in forests has attracted wide attention under the background of the backdrop of intensified global species loss.However,current research primarily focuses on single aspect of biodiversity,rarely considering species,functional,and structural diversity simultaneously.It still remains unclear which aspects of biodiversity influence changes in aboveground biomass.Methods:Based on the census data of 1 ha secondary forest plot from Donglingshan in Beijing,we analyzed the correlation between biotic and abiotic factors and aboveground biomass using linear regression model.Additionally,structural equation modeling(SEM)was employed to comprehensively compare the relative impacts of species,functional,and structural diversity on aboveground biomass.Results:(1)The multiple regression results indicated that plots with higher Pielou evenness index,community weighted mean trait value of specific leaf area(CWM.SLA),DBH Shannon index and stand density had a significant positive impact on aboveground biomass,while functional dispersion(FDis)and elevation had a significant negative impact on aboveground biomass.(2)Structural equation model indicated that stand density and structural diversity,primarily represented by DBH Shannon index,had the greatest total effect on aboveground biomass,followed by elevation,species diversity(Pielou evenness index),and functional diversity(functional dispersion and community weighted mean trait value of specific leaf area).Conclusion:The study suggests that both the niche complementarity hypothesis and the mass ratio hypothesis jointly explain the aboveground biomass in warm temperate deciduous broad-leaved forests,with the niche complementarity effect caused by stand density and DBH Shannon index.The findings provide strong support for explaining the biodiversity-ecosystem functioning relationship and offer a theoretical basis for the sustainable management and conservation of warm temperate forests,holding significant practical im

关 键 词：物种多样性 功能多样性 群落结构 森林地上生物量 

分 类 号：S718.54[农业科学—林学]