Fig. 6: Observed changes in key reef benthos in relation to the saturation state of aragonite (ΩAr).
From: Progressive changes in coral reef communities with increasing ocean acidification
Shown are the percent cover of complex hard corals (HC, light grey), crustose coralline algae (CCA, magenta), non-calcareous (NCalc) macroalgae (blue), and hard coral diversity (black). The vertical lines represent the ΩAr values predicted for much of the tropics for the year 2100 by Jiang et al.39 for the five Shared Socioeconomic Pathways emission scenarios: SSP1–1.9 (blue), SSP1–2.6 (yellow), SSP2–4.5 (orange), SSP3–7.0 (brown) and SSP5–8.5 (red)6,39.
