中山大学学报（自然科学版）（中英文）2024，Vol.63Issue(6)：122-131,10.DOI:10.13471/j.cnki.acta.snus.ZR20240160
功能性状与干旱下树木自然更新能力关系的meta分析
A meta analysis of the association between functional trait and tree regeneration capacity under drought
摘要
Abstract
More frequent and more extreme drought events under global change have posed severe threats to global ecosystems.Forests play an irreplaceable role in maintaining global ecosystem stability.Because different tree species show varying degrees of drought sensitivity,which is especially true at the early natural regeneration stage,where seed production,germination,and seedling growth of tree species strongly depend on water conditions,it is of profound significance to explore the underlying mechanisms of the intraspecific differences of species in response to drought.While numerous experi-mental and integrated studies have been conducted for adult tree responses to drought,integrated studies on the natural regeneration of trees are still lacking.In this study,a meta-analysis was conducted by collecting the data of regeneration-related indicators such as seed yield,seed germination,seedling emergence and seedling survival based on field observations and controlled experiments at the global scale.We quantified drought effects on the natural regeneration of different tree species and explored the explanatory potential of plant functional traits[i.e.,leaf area,leaf thickness,plant height,root rooting depth,seed dry mass,specific leaf area(SLA),stomatal conductance,P50,leaf water potential]on the differential drought responses across species.Functional traits affecting natural regeneration of trees under drought stress showed a coordinated relationship among photosynthesis and leaf morphologies.The species that could reduce water loss while maintaining high photosynthetic rate tend to have a stronger regeneration capacity.This study provides integrative evidence of the effects of tree functional traits on natural regeneration under drought stress and highlights the importance of incorporating plant trait information in forest conservation under global climate change.关键词
干旱/自然更新/树木/功能性状/meta分析Key words
drought/regeneration/tree/traits/meta-analysis分类
农业科技引用本文复制引用
廖慧璇,薛亚林..功能性状与干旱下树木自然更新能力关系的meta分析[J].中山大学学报（自然科学版）（中英文）,2024,63(6):122-131,10.基金项目
国家重点研发计划项目(2022YFF0802300) （2022YFF0802300）
