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<p>Understanding the phylogenetic structure patterns of forest plants and their drivers is crucial for preserving the evolutionary potential of biodiversity. However, current knowledge remains relatively limited regarding high-latitude temperate forests. Here, we investigated over 38,000 plots in the largest natural forest region of China. Phylogenetic structure metrics (standardized phylogenetic diversity, SesPD; standardized mean pairwise distance, SesMPD; standardized mean nearest taxon distance, SesMNTD) were calculated. Geoclimatic factors (mean annual temperature, MAT; mean annual precipitation, MAP; altitude), community attributes (tree height, TH; diameter at breast height; shrub coverage; shrub abundance; herb coverage, HC), and soil property (total phosphorus) were derived from integrated field surveys and remote sensing. The phylogenetic structure of trees was clustered at the whole-community level (SesMPD &lt; 0, <i>p</i> &lt; 0.001), while overdispersed at the local-community level (SesMNTD &gt; 0, <i>p</i> &lt; 0.05). At both whole-community and local-community levels, shrub phylogenetic structure was clustered, while herb phylogenetic structure was overdispersed. The phylogenetic structure was primarily driven by geoclimatic factors for trees (explanatory power = 45.9%), but by community attributes for shrubs (53.2%) and herbs (65.3%).​ Higher TH and lower MAP corresponded to higher SesPD and SesMPD in trees; higher MAT induced a phylogenetic overdispersion pattern in shrubs; higher HC and lower TH promoted this pattern in herbs. The driving pathways and directions (positive or negative effects) of drivers on phylogenetic structure also varied across life-forms. Identifying key drivers of phylogenetic structure across plant life-forms is essential for conserving evolutionary potential, providing a scientific basis for biodiversity conservation in high-latitude temperate forests.</p>

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Patterns of phylogenetic structure across plant life-forms in a large temperate forest and their possible drivers

  • 期刊论文

  • 发表日期：

    2026年3月12日

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  • Yanbo Yang,
  • Danqi She,
  • Yuhong Zhang,
  • Jinghua Yu,
  • Lihua Wang,
  • Huimei Wang,
  • Shijie Han,
  • Wenjie Wang

摘要

Understanding the phylogenetic structure patterns of forest plants and their drivers is crucial for preserving the evolutionary potential of biodiversity. However, current knowledge remains relatively limited regarding high-latitude temperate forests. Here, we investigated over 38,000 plots in the largest natural forest region of China. Phylogenetic structure metrics (standardized phylogenetic diversity, SesPD; standardized mean pairwise distance, SesMPD; standardized mean nearest taxon distance, SesMNTD) were calculated. Geoclimatic factors (mean annual temperature, MAT; mean annual precipitation, MAP; altitude), community attributes (tree height, TH; diameter at breast height; shrub coverage; shrub abundance; herb coverage, HC), and soil property (total phosphorus) were derived from integrated field surveys and remote sensing. The phylogenetic structure of trees was clustered at the whole-community level (SesMPD < 0, p < 0.001), while overdispersed at the local-community level (SesMNTD > 0, p < 0.05). At both whole-community and local-community levels, shrub phylogenetic structure was clustered, while herb phylogenetic structure was overdispersed. The phylogenetic structure was primarily driven by geoclimatic factors for trees (explanatory power = 45.9%), but by community attributes for shrubs (53.2%) and herbs (65.3%).​ Higher TH and lower MAP corresponded to higher SesPD and SesMPD in trees; higher MAT induced a phylogenetic overdispersion pattern in shrubs; higher HC and lower TH promoted this pattern in herbs. The driving pathways and directions (positive or negative effects) of drivers on phylogenetic structure also varied across life-forms. Identifying key drivers of phylogenetic structure across plant life-forms is essential for conserving evolutionary potential, providing a scientific basis for biodiversity conservation in high-latitude temperate forests.