Table 1. Initial timing of decline in Acropora presence and dominance relative to prehuman baseline.

Earliest occurrences of significant increase or decrease in proportion of sites with Acropora present and dominant relative to Pleistocene baseline time bin (from GLMM models). Presence and dominance for A. cervicornis declined significantly between the Pleistocene and Holocene periods as well as between Pleistocene and mid-20th century.

Reef zone	Species	Abundance measure	Earliest change relative to Pleistocene	Change	Z	P level	Sites	Countries
Crest	A. palmata	Presence	1960–1969	94–65%	−3.8	0.001	2365	27
		Dominance	1950–1959	78–49%	−2.0	0.05	2343
	A. cervicornis	Presence	Holocene	73–46%	−2.3	0.05	2090
			1950–1959	73–33%	−2.1	0.05	–
		Dominance	1960–1969	18–7%	−2.0	0.05	2081
Midslope	A. cervicornis	Presence	Holocene	92–39%	−4.2	0.001	5101	30
			1950–1959	92–44%	−3.7	0.001	–
		Dominance	Holocene	63–17%	−3.8	0.001	5185
			1960–1969	63–12%	−4.4	0.001	–
	A. palmata	Presence	1960–1969	47–10%	−4.1	0.001	5043
		Dominance	1990–1994	4–<1%	−2.5	0.01	5150