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. 2021 Mar 22;12:622043. doi: 10.3389/fpls.2021.622043

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Copyright © 2021 Feng, Huang, Xu, Li and Zang.

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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Pairwise relationships among species richness (SR), skewness, Berger–Parker index (d), and proportion of singletons (PS). Blue lines in the bottom left panels are the smooth curves about the pairwise relationships. Values in the upper right panels are the coefficients of correlation with significant values asterisked (p < 0.05); positive and negative coefficients have their background panels colored with cyan and red, respectively, larger absolute values of coefficients are in darker colors.