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 Bridge, T.C.L., Done, T.J., Beaman, R.J., Friedman, A.L., Williams, S.B., Pizarro, O. & Webster, J.M. |
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Topography, substratum and benthic macrofaunal relationships on a tropical mesophotic shelf margin, central Great Barrier Reef, Australia
In Coral Reefs, vol. online, Sep, 2010, pp. 11
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Abstract
Habitats and ecological communities occurring in the mesophotic region of the central Great Barrier Reef
(GBR), Australia, were investigated using autonomous underwater vehicle (AUV) from 51 to 145 m. High- resolution multibeam bathymetry of the outer-shelf at Hydrographers Passage in the central GBR revealed submerged linear reefs with tops at 50, 55, 80, 90, 100 and 130 m separated by flat, sandy inter-reefal areas punctuated by limestone pinnacles. Cluster analysis of AUV images yielded five distinct site groups based on their benthic macrofauna, with rugosity and the presence of limestone reef identified as the most significant abiotic factors explaining the distribution of macrofaunal communities.
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