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. 2022 Feb 25;31(8):2327–2347. doi: 10.1111/mec.16400

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© 2022 The Authors. Molecular Ecology published by John Wiley & Sons Ltd.

This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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PC and environmental parameter correlation heatmap. The six significant axes of genetic variation (PCs) from PCA on 149 non‐outlier Hawaiian isotypes are shown on the x‐axis (PCs 1–6), and continuous environmental parameters are plotted on the y‐axis. The cell values represent the Pearson's correlation coefficient between a given PC and environmental parameter values, bold values with an asterisk indicate a significant correlation. The cell colours correspond to the strength and direction of the correlation (see colour scale on the right)