树种多样性和土壤微生物多样性对人工林生产力的影响  

Effects of tree species diversity and soil microbial diversity on stand productivity in plantations

作　　者：李茜 王晖 栾军伟 高丙 王一 刘世荣[2] LI Xi;WANG Hui;LUAN Junwei;GAO Bing;WANG Yi;LIU Shirong(Institute of Resources and Environment,International Centre for Bamboo and Rattan,Key Laboratory of National Forestry and Grassland Administration/Beijing for Bamboo&Rattan Science and Technology,Beijing 100102,China;Key Laboratory of Forest Ecology and Environment of National Forestry and Grassland Administration,Ecology and Conservation Institute,Chinese Academy of Forestry,Beijing 100091,China)

机构地区：[1]国际竹藤中心竹藤资源与环境研究所,国家林业和草原局/北京市共建竹藤科学与技术重点实验室,北京100102 [2]国家林业和草原局森林生态与环境重点实验室,中国林业科学院森林生态环境与自然保护研究所,北京100091

出　　处：《生态学报》2023年第12期4984-4994,共11页Acta Ecologica Sinica

基　　金：国家自然科学基金重点项目(31930078);国家自然科学基金延续项目(CAFNSSFC201801)。

摘　　要：林分生产力通常会随着树种多样性增加而增加,但不同营养级生物多样性以及树种和土壤微生物多样性之间的相互作用如何影响生产力目前尚不清楚。以亚热带不同丰富度和树种组成的人工林为研究对象,从物种、功能性状、遗传三个维度的树种多样性以及土壤真菌和细菌系统发育多样性,探究了中国亚热带人工林树种多样性和土壤微生物多样性对林分生产力的影响。研究发现,林分生产力随树种功能多样性(FD)(P<0.001)、比叶面积群落加权均值(CWM-SLA)(P<0.01)、树种系统发育多样性(PD)(P<0.05)和土壤真菌多样性(PDF)(P<0.01)的增加而显著增加,分别解释了林分生产力总变异的12.86%、6.80%、3.67%和3.08%。FD和CWM-SLA可分别通过增加土壤真菌、细菌多样性而间接提高林分生产力。研究结果表明多营养级生物多样性是维持高水平林分生产力的基础,树种多样性和土壤微生物多样性之间的自上而下的级联效应在调节生态系统生产力方面发挥着重要作用。Forest productivity generally increases with tree species diversity.However,it is unclear how biodiversity of different trophic-level and interactions between tree species diversity and soil microbial diversity affect stand productivity.In this study,we selected plantations with different tree species richness and compositions in subtropical China,to investigate the effects of tree species diversity and soil microbial diversity on stand productivity,by using indicators of tree species richness,functioanl traits diversity,phylogenetic diversity as well as phylogenetic diversity of soil fungi and bacteria.The results showed that stand productivity increased significantly with tree functional diversity(FD)(P<0.001).Community weighted mean of specific leaf area(CWM-SLA)(P<0.01),phylogenetic diversity(PD)(P<0.05)and soil fungal diversity(PDF)(P<0.01),explaining 12.86%,6.80%,3.67%,and 3.08%of the total variance in stand productivity,respectively.FD and CWM-SLA can indirectly improve stand productivity by increasing the diversity of soil fungi and bacteria,respectively.Our findings suggest that pluritrophic biodiversity is conducive to maintain a high level stand productivity,and the top-down cascading effect between tree species diversity and soil microbial diversity plays an important role in shaping ecosystem productivity.

关 键 词：人工林 树种多样性 土壤微生物多样性 生产力 

分 类 号：S718.5[农业科学—林学]