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. 2021 Mar 4;12:637214. doi: 10.3389/fpls.2021.637214

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Copyright © 2021 Meudt, Albach, Tanentzap, Igea, Newmarch, Brandt, Lee and Tate.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Estimated path analysis to explain the influence of polyploidy on the diversity of endemic island plant species. The model was fitted to 150 lineages across four archipelagos for which we had published estimates of their stem age and chromosome numbers. Arrows are scaled proportional to standardized effect sizes and only statistically significant pathways (p < 0.05) are shown (e.g., direct effects of repeat colonization and source pool size on endemic diversity were tested but not significant). Gray text and arrows refer to pathways that were statistically significant only on the Hawaiian (HI) or the Juan Fernández (JF) Islands.