Figure 1:

Maps showing the location of Hardy Reef (A), located 75 km offshore within the central sector of the Great Barrier Reef, Australia, and three study sites (B): a high-use visitor platform, an unused visitor platform and a control site with no platform. The unused platform is situated ∼300 m south of the high-use platform (C), and the control site lies an additional 800 m south of the unused platform. Photographs showing representative images of healthy (D), diseased (white syndrome; E) and damaged colonies (F) of the coral Acropora millepora in January 2011.