Fig. 1

Heron Reef, southern Great Barrier Reef, Australia. (a) Location of photoquadrat transect surveys on Heron Reef collected over a period of 17 years, (b) example of the individual photoquadrat locations along the transect survey where each individual point represents a photoquadrat, and (c) conceptualisation of snorkeler-based georeferenced photoquadrat transect surveys.