Fig. 2: Presence, abundance, and depth distribution of several functional groups of macroalgae across stations (red dots) in the Ross Sea, Antarctica.

Available global bathymetric data are presented and bounded between 0–200 m depth (a). Pie charts (a) show the presence of macroalgal functional groups at each location (numbered 1–5 for Robertson Bay, Cape Adare, Possession Islands, Cape Hallet and Wood Bay, respectively). The depth distribution of each macroalgal group across all stations (b) shows the density of individual thalli for each transect (±95% CI). Note the y-axes are square root transformed to visualise transects where very low densities were recorded. Depth and density data are fitted using general additive models (GAM).