Species abundance is jointly determined by functional traits and negative density dependence in a subtropical forest in southern China
植物物种多度受功能性状和负密度依赖共同影响--以中国南亚热带黑石顶森林样地为例作者机构：Department of EcologyState Key Laboratory of BiocontrolSchool of Life SciencesSun Yat-sen UniversityGuangzhou 510275China School of Ecological and Environmental SciencesEast China Normal UniversityShanghai 200241China
出 版 物：《Journal of Plant Ecology》 (植物生态学报（英文版）)
年 卷 期：2021年第14卷第3期
页 面：491-503页
核心收录：
基 金：This work was supported by the National Natural Science Foundation of China(31925027 31622014 and 31570426 to C.C.)
主 题：tree abundance negative density dependence functional traits common species rare species
摘 要：Aims The factors affecting species abundance are a subject of ongoing debates in community *** studies have demonstrated that tree abundance is affected by plant functional traits and negative density dependence(NDD).However,few studies have focused on the combined effects of NDD and plant functional traits on species *** In this study,we used tree functional traits and two census data from a 50-ha forest dynamic plot in the Heishiding(HSD)Nature Reserve to explore the combined effects of functional traits and NDD on species *** hierarchical Bayesian models,we analyzed how neighbor densities affected the survival of saplings from 130 species and extracted posterior means of the coefficients to represent *** structural equation modeling(SEM)analysis was then applied to investigate the causal relationships among species functional traits,NDD and species *** Findings SEM showed that tree functional traits,including specific leaf area(SLA),leaf area(LA),leaf dry matter content(LDMC),leaf N content(LNC),maximum electron transport rate(ETRmax)and conspecific adult negative density dependence(CNDDadult),together explained 20%of the total variation in tree ***,SLA affected tree abundance both directly and indirectly via CNDDadult,with a totally negative influence on *** and LNC had only indirect effects mediated by CNDDadult on tree *** and LA had directly negative effects on abundance,but their direct connections with CNDDaduIt were not *** addition,CNDDadult was negatively correlated with species abundance,indicating that abundant species are under stronger *** these investigated traits,SLA contributed the most to the variation in CNDDaduIt and *** argued that our findings of trait-CNDDadult-abundance relationships can improve our understanding of the determinants of species commonness and rarity in forests.
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