Publications

Harris et al. 2004


scientific article | Mar Geol | open access Open access small aa108fa7f478951c693af64a05bc4b46e6711dbb69a20809512a129d4d6b870f

Submerged coral reefs in the Gulf of Carpentaria, Australia

Harris PT, Heap AD, Wassenberg T, Passlow V

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Abstract

We report the discovery of three submerged, living patch coral reefs covering 80 km2 in the southern Gulf of Carpentaria, Australia, an area previously thought not to contain coral bioherms. The patch reefs have their upper surfaces at a mean water depth of 28.6±0.5 m, and were consequently not detected by satellites or aerial photographs. The reefs were only recognised in our survey using multibeam swath sonar supplemented with seabed sampling and under water video. Their existence points to an earlier, late Quaternary phase of framework reef growth, probably under cooler climate and lower sea level conditions than today. Submerged reefs with surfaces between 20 and 30 m water depth occur in other regions of the Earth and existing bathymetry indicates they could be widespread in the Gulf. Many tropical regions that today do not support patch or barrier reefs for reasons similar to the modern Gulf, may have done so in the past, when environmental conditions were more suitable. Submerged reefs may provide an important refuge for corals during the next few decades when near-surface reefs are threatened by widespread coral bleaching due to warmer global sea surface temperatures.

Research sites

10.1016   j.margeo.2004.03.002
Keywords
Meta-data (pending validation)
Depth range
10- 50 m

Mesophotic “mentions”
0 x (total of 2470 words)

Fields
Community structure Geomorphology

Research focus
Scleractinia (Hard Corals) Overall benthic (groups) Porifera (Sponges)

Locations
Australia - Northern Australia

Research platforms
Sonar / Multibeam Coring / drilling Dredging / trawling Towed Video
Author profiles
Peter Harris ( 6 pubs)
Andrew Heap ( 3 pubs)