Hotspots within a hotspot: Evolutionary measures unveil interesting biogeogeographic patterns for the conservation of the coastal forest in Chile

Aim: Given the continuous loss of biodiversity, there is an urgent need to study its patterns to generate conservation measures. Complementing the traditional patterns with indices that incorporate evolutionary aspects such as phylogenetic diversity or phylogenetic endemism (PD and PE) allows us to infer possible historical processes that could explain the conformation of current biodiversity. Coastal forests in Chile are part of a biodiversity hotspot of high endemism that is under threat. In this study, patterns of richness and endemism were determined and contrasted with the evolutionary indices PD, PE, PDres (residual PD), RPD (relative PD), and RPE (relative PE) to infer historical processes that could have shaped the current diversity patterns. We also compared these indices at different taxonomic levels. Location: Thirteen sites on a latitudinal gradient between 30°S and 40°S that are part of the Chilean Coastal mountain range. Taxon: Woody flora at the species level. Methods: DN...研究目标：鉴于生物多样性持续丧失，亟需探究其分布格局以制定针对性保护措施。纳入系统发育多样性（Phylogenetic Diversity, PD）、系统发生特有性（Phylogenetic Endemism, PE）等演化维度的指数以补充传统多样性格局分析，可助力推断解释当前生物多样性组成的潜在历史过程。智利沿海森林属于高度特有且正面临威胁的生物多样性热点区域。本研究明确了物种丰富度与特有性格局，并将其与PD、PE、残差系统发育多样性（Residual Phylogenetic Diversity, PDres）、相对系统发育多样性（Relative Phylogenetic Diversity, RPD）以及相对系统发生特有性（Relative Phylogenetic Endemism, RPE）等演化指数进行对比，以推断塑造当前多样性格局的历史过程；同时还在不同分类学层级上对上述指数开展了比较分析。 研究区域：位于智利沿海山脉的13个样点，沿纬度梯度分布于南纬30°至40°之间。 研究类群：物种级木本植物区系。 研究方法：DN...