Huang Xing-Zhao, Li Fang-Bing, Wang Zi-Xuan, Jin Yi, Qian Hong
School of Forestry & Landscape of Architecture, Anhui Agricultural University, Hefei 230036, China.
State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China.
Plant Divers. 2022 Dec 2;45(2):229-233. doi: 10.1016/j.pld.2022.11.005. eCollection 2023 Mar.
Knowledge of which biological and functional traits have, or lack, phylogenetic signal in a particular group of organisms is important to understanding the formation and functioning of biological communities. Allometric biomass models reflecting tree growth characteristics are commonly used to predict forest biomass. However, few studies have examined whether model parameters are constrained by phylogeny. Here, we use a comprehensive database (including 276 tree species) compiled from 894 allometric biomass models published in 302 articles to examine whether parameters a and b of the model (where W stands for aboveground biomass, D is diameter at breast height) exhibit phylogenetic signal for all tree species as a whole and for different groups of tree species. For either model parameter, we relate difference in model parameter between different tree species to phylogenetic distance and to environmental distance between pairwise sites. Our study shows that neither model parameter exhibits phylogenetic signals (Pagel's λ and Blomberg's K both approach zero). This is the case regardless of whether all tree species in our data set were analyzed as a whole or tree species in different taxonomic groups (gymnosperm and angiosperm), leaf duration groups (evergreen and deciduous), or ecological groups (tropical, temperate and boreal) were analyzed separately. Our study also shows that difference in each parameter of the allometric biomass model is not significantly related to phylogenetic and environmental distances between tree species in different sites.
了解特定生物群体中哪些生物学和功能性状具有或缺乏系统发育信号，对于理解生物群落的形成和功能至关重要。反映树木生长特征的异速生物量模型通常用于预测森林生物量。然而，很少有研究探讨模型参数是否受到系统发育的限制。在这里，我们使用一个综合数据库（包括276个树种），该数据库由302篇文章中发表的894个异速生物量模型汇编而成，以研究模型（其中W代表地上生物量，D代表胸径）的参数a和b对于所有树种整体以及不同树种组是否表现出系统发育信号。对于任一模型参数，我们将不同树种之间的模型参数差异与成对地点之间的系统发育距离和环境距离联系起来。我们的研究表明，两个模型参数均未表现出系统发育信号（Pagel's λ和Blomberg's K均接近零）。无论我们数据集中的所有树种是作为一个整体进行分析，还是分别分析不同分类组（裸子植物和被子植物）、叶持续时间组（常绿和落叶）或生态组（热带、温带和寒带）中的树种，情况都是如此。我们的研究还表明，异速生物量模型的每个参数差异与不同地点树种之间的系统发育和环境距离均无显著关系。
