Statistical comparison of current measures from 27 different sites on a coral reef spanning 3 levels of wind exposure (exposed, oblique and sheltered) and 3 different depths (3, 6 and 9 m).

A) No significant differences in drag forces were found among locations of equal depth and exposure. B) When sites were pooled by habitat and depth (exposed, oblique and sheltered habitats each at 3, 6 and 9 m depth), multiple comparisons revealed significant differences among all habitats, except the exposed 9 m, oblique 6 m and sheltered 3 m habitats (z-values on lower section, P-values on upper section in bold). FDR corrections were used to avoid Type I errors (α = 0.025) (Benjamini and Hochberg 1995).