Results of covariance analysis corresponding to the linear regressions drawn in Figure 1 plus Antarctic data.

P-values are indicated for the comparison between slopes and intercepts for each pair of environments. NHWTSH: Northern Hemisphere Warm Temperate environments in Shallow Water (<2 m), NHWT: Northern Hemisphere Warm Temperate environments in deeper water, SHWT: Southern Hemisphere Warm Temperate environment, CT: Cold Temperate environment and A: Antarctic environment.
*: statistically significant.