Environment-driven intraspecific variation shows coordination of functional traits of deciduous oaks among and within different biological levels  

作　　者：Yutong Lin Yuan Lai Songbo Tang Jeannine Cavender-Bares Josep Peñuelas Jordi Sardans Jianfeng Liu Lingling Zhang Yuanwen Kuang 

机构地区：[1]Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems,South China Botanical Garden,Chinese Academy of Sciences,Guangzhou 510650,People’s Republic of China [2]Yulin Normal University,Yulin 537000,People’s Republic of China [3]University of Chinese Academy of Sciences,Beijing 100049,People’s Republic of China [4]Guangdong Provincial Key Laboratory of Applied Botany,South China Botanical Garden,Chinese Academy of Sciences,Guangzhou 510650,People’s Republic of China [5]Department of Ecology,Evolution and Behavior University of Minnesota,St.Paul,MN 55108,USA [6]CSIC,Global Ecology Unit CREAF-CSIC-UAB,08193 Bellaterra,Barcelona,Catalonia,Spain [7]CREAF,Cerdanyola del Vallès,08193 Barcelona,Catalonia,Spain [8]Research Institute of Forestry,Chinese Academy of Forestry,Beijing 100091,People’s Republic of China

出　　处：《Journal of Forestry Research》2024年第6期95-109,共15页林业研究（英文版）

基　　金：supported by the Key Area Research and Development Program of Guangdong Province(2022B1111230001);theScience and Technology Foundation of Guangxi Zhuang Autonomous Region(Guike AD23026080);the National Natural Science Founda tion of China(No.42071065);Natural Science Foundation of US(No.2021898).

摘　　要：Deciduous oaks(Quercus spp.)are distributed from subalpine to tropical regions in the northern hemi-sphere and have important roles as carbon sinks and in climate change mitigation.Determining variations in plant functional traits at multiple biological levels and linking them to environmental variables across geographical ranges is important for forecasting range-shifts of broadly-distrib-uted species under climate change.We sampled leaves of five deciduous Quercus spp.covering approximately 20°of latitude(~21°N-41°N)and 20 longitude(~99°E-119°E)across China and measured 12 plant functional traits at different biological levels.The traits varied distinctively,either within each biological level or among different levels driven by climatic and edaphic variables.Traits at the organ level were significantly correlated with those at the cellular and tissue levels,while traits at the whole-plant level only correlated with those at the tissue level.The Quercus species responded to changing environments by regulating stomatal size,leaf thickness and the palisade mesophyll thickness to leaf thickness ratios with contrasting degree of effect to adjust the whole-plant functioning,i.e.,intrinsic water use efficiency(iWUE),carbon supply and nitrogen availability.The results suggest that these deciduous Quercus spp.will maintain vigour by increasing iWUE when subjected to large temperature changes and insufficient moisture,and by accu-mulating leaf non-structural carbohydrates under drought conditions.The findings provide new insights into the inher-ent variation and trait coordination of widely distributed tree species in the context of climate change.

关 键 词：Climate gradient Intraspecific variation Plant functional traits Deciduous Quercus species Whole-plant function 

分 类 号：S718.5[农业科学—林学]