Fig. 2: Changes in density and total mass between living vs. dead colonies.

The plots on the left (a–d) show the absolute mass change between living vs. dead colonies. The dots indicate the annual density values calculated for each species according to its state (i.e., living or dead). The black lines above the dots indicate the 95% CIs. The central graphs (e–h) show the coefficient estimates and confidence intervals of the linear mixed models (LMM). The dots represent the average slope of each model and lines represent coefficient and indicate the 95% CIs. Slopes are significantly different from zero if their 95% CIs do not overlap with the vertical dashed line centered on zero. All plots were derived from the LMM estimates of linear trends. The plots on the right (i–l) show trends for each species for changes in density in different sections of the colonies (current years refer to shallow sections of the colony; older years indicate deeper sections of the skeleton). Shading represents the 95% CIs. All plots are based on LMM models.