武夷山常绿阔叶林乔木与灌木小枝树皮主要功能性状的趋同

树皮是维管形成层以外的所有组织，其功能性状是反映植物生态适应策略的重要研究对象。为了揭示亚热带山地乔、灌木小枝树皮功能性状特征及其关联性，采用独立样本T检验和标准主轴回归方法对武夷山19种常见木本植物小枝树皮的主要功能性状的基本特征及其相关性进行了分析。结果发现：(1)树皮厚度、树皮密度与树皮含水量在乔、灌木之间无显著差异，其均值分别为(0.78±0.06)mm、(0.58±0.03)mg/cm³和(155.07±14.16)%。树皮碳(C)、氮(N)、磷(P)生态化学计量特征在乔、灌木之间差异也不显著，C、N、P平均值分别为(492.43±4.25)mg/g、(8.90±0.74)mg/g和(0.61±0.06)mg/g,树皮C∶N、C∶P与N∶P平均值分别为60.76±4.17、905.53±67.36与15.19±0.84。(2)树皮性状之间存在关联，其中树皮厚度与密度、密度与含水量均呈异速生长关系，而树皮厚度与含水量、氮含量与磷含量均呈等速生长关系。乔木树皮碳含量和磷含量间、灌木树皮密度和氮含量间均呈异速生长关系，乔木与灌木各性状间关系差异不显著。结果表明...

Convergence of main bark functional traits of tree and shrub twigs in evergreen broad-leaved forest of the Wuyi Mountain

Bark is all tissues except vascular cambium, and its functional traits are important research objects to reflect plant ecological adaptation strategies. In order to reveal the characteristics and correlations of functional traits of twig bark of trees and shrubs in subtropical mountains, this paper analyzed the basic characteristics and correlations of the main functional traits of twig bark of 19 common woody plants in Wuyi Mountain using independent samples t-test and standard principal axis regression methods. The results found that (1) bark thickness, bark density and bark water content were not significantly different between trees and shrubs, with mean values of (0.78±0.06) mm, (0.58±0.03) g/cm³, and (155.07±14.16)%, respectively. The ecological stoichiometric characteristics of bark carbon (C), nitrogen (N) and phosphorus (P) also did not differ significantly between trees and shrubs, with mean values of (492.43±4.25) mg/g, (8.90±0.74) mg/g and (0.61±0.06) mg/g for C, N and P, respectively, and mean values of (60.76±4.17), (905.53±67.36), and (15.19±67.36) for C:N, C:P and N:P, respectively. (2) There were correlations between bark traits. Among them, the relationships between bark thickness and density, density and water content show allometric growth, while the relationships between bark thickness and water content, nitrogen content and phosphorus content show isokinetic growth. The relationships between tree bark carbon content and phosphorus content, shrub bark density and nitrogen content show allometric growth, and there is no significant difference between tree and shrub traits. The results of this study indicate that there is a convergence between the main functional traits of tree and shrub twig bark in the same subtropical mountain environment, reflecting similar adaptation strategies of woody plants in the same altitude environment.