a significant trendP = 0.6680
HBL did not show a significant trend over elevation in the small dataset analysis (D2; F 1,48 = 0.1862, P = 0.6680), but did follow a significant U-shaped distribution along elevation in D4 analysis ( S1 File ) (HBL model R 2 adj = -0.0326, F 4,79 = 7.909) ( Figs 2 and 3A ).