Fig. 4

Pairwise trait correlations are visualised with line colours and widths conferred according to the strength and direction of Pearson’s correlation coefficient (r) between trait pairs. Non-significant correlations are depicted with grey, point 1 lines. Significant positive and negative correlations (p < 0.05) are depicted with point 2 lines coloured light green or light red, respectively. Strong positive and negative correlations (r > 0.5) are depicted with point 3 lines coloured dark green or dark red, respectively. Very strong positive correlations (r > 0.8) are also shown in dark green with point 4 lines