a decreasing trendp = 2.4e-10
Scaled He revealed a decreasing trend in diversity from east to west using the whole meta-dataset ( r s = 0.4, p = 2.4e-10, Fig. 4 d), while a weak but opposite trend was observed with the unscaled data ( r s = − 0.19, p = 0.004, Fig. 4 c).