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. 2021 Sep 24;4:1128. doi: 10.1038/s42003-021-02649-2

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© The Author(s) 2021

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 5 — The latitudinal plant species gradient is strongly influenced by arbuscular (AM) and orchid (ORC) mycorrhizal plant species. In mainland regions, the proportion of mycorrhizal plant species decreases with absolute latitude (degree from equator) more strongly for arbuscular mycorrhizal (green line: absolute latitude estimate = −0.042 ± 0.080, p = 0.60, n = 515; squared latitude estimate −0.414 ± 0.080, p < 0.001, n = 515; GLM), than for ectomycorrhizal and ericoid (EEM) plant species (blue line: absolute latitude estimate = 0.051 ± 0.082, p = 0.54, n = 515; squared latitude estimate = −0.400 ± 0.082, p < 0.001, n = 515; GLM) and orchid mycorrhizal plant species (purple line: absolute latitude estimate = −1.216 ± 0.144, p < 0.001, n = 486; squared latitude estimate = 0.283 ± 0.144, p = 0.05, n = 486). Non-mycorrhizal species counts plotted for reference (gray line: absolute latitude estimate = 0.132 ± 0.132, p = 0.1, n = 486; squared latitude estimate = −0.330 ± 0.080, p < 0.001, n = 486; GLM). Confidence intervals represent 95% confidence intervals.