Relationships between functional diversity metrics (mean ± 1SE across 7 locations) and depth: (a) species‐level metrics (S = species richness) and (b) intraspecific trait variability metrics. Lines correspond to fitted values for the best model when depth was considered a fixed factor and latitude a random factor (see Table S1 in Supplementary Material). Solid lines show statistically significant trends (p < .05); dashed lines show trends that did not reach statistical significance at the 0.05‐level. The conditional R
2 (Condi.R
2) and marginal R
2 (Margi.R
2) are overlaid for each metric and represent variation explained by both the fixed and random effects jointly and variation explained only by the fixed effects, respectively (Nakagawa et al., 2017). Blue dots represent the average value per depth. Black horizontal bars, black dots, and boxes show the median, outliers, and interquartile range, respectively. Whiskers represent 1.5 times the interquartile range