Benthic and coral reef community field data for Heron Reef, Southern Great Barrier Reef, Australia, 2002-2018

Abstract

This paper describes benthic coral reef community composition point-based field data sets derived from georeferenced photoquadrats using machine learning. Annually over a 17 year period (2002-2018), data were collected using downward-looking photoquadrats that capture an approximately 1 m² footprint along 100 m-1500 m transect surveys distributed along the reef slope and across the reef flat of Heron Reef (28 km²), Southern Great Barrier Reef, Australia. Benthic community composition for the photoquadrats was automatically interpreted through deep learning, following initial manual calibration of the algorithm. The resulting data sets support understanding of coral reef biology, ecology, mapping and dynamics. Similar methods to derive the benthic data have been published for seagrass habitats, however here we have adapted the methods for application to coral reef habitats, with the integration of automatic photoquadrat analysis. The approach presented is globally applicable for various submerged and benthic community ecological applications, and provides the basis for further studies at this site, regional to global comparative studies, and for the design of similar monitoring programs elsewhere.

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.