Postglacial determinants of regional species pools in alpine grasslands

Aim: Alpine habitats support unique biodiversity confined to high-elevation areas in the current interglacial. Plant diversity in these habitats responds to area, environment, connectivity and isolation, yet these factors have been rarely evaluated in concert. Here we investigate major determinants of regional species pools in alpine grasslands, and the responses of their constituent species groups.

Location: European mountains below 50ºN.

Time Period: Between 1928 and 2019.

Major Taxa Studied: Vascular plants.

Methods: We compiled species pools from alpine grasslands in 23 regions, including 794 alpine species and 2,094 non-alpines. We used species-area relationships to test the influence of the extent of alpine areas on regional richness, and mixed-effects models to compare the effects of 12 spatial and environmental predictors. Variation in species composition was addressed by generalized dissimilarity models and by a coefficient of dispersal direction to assess historica...

目标：当前间冰期下，高山栖息地孕育着局限于高海拔区域的独特生物多样性。这些栖息地的植物多样性受面积、环境、连通性及隔离度的影响，但这些因素很少被综合评估。本文旨在探究高山草原区域物种库的主要决定因素，以及其组成物种群的响应模式。

地点：北纬50度以南的欧洲山脉。

时间范围：1928年至2019年。

主要研究类群：维管植物（Vascular plants）。

方法：我们收集了23个区域高山草原的物种库数据，涵盖794种高山物种与2094种非高山物种。通过物种-面积关系分析，检验高山区域范围对区域丰富度的影响；利用混合效应模型，比较12个空间及环境预测因子的效应。物种组成的变异通过广义差异模型及扩散方向系数进行分析，以评估历史...