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. 2021 Jun 24;9(1):coab046. doi: 10.1093/conphys/coab046

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© The Author(s) 2021. Published by Oxford University Press and the Society for Experimental Biology.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.

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(a) Heron Island (23°26.1871″S, 151°54.3023″E) is situated on the Southern GBR. The position of Heron Island is marked by a black circle. Different reef zones are shown. A white x marks coral collection from reef flat. (b) Reef flat flow transects. Flow speed was measured along three transects at five points spaced by 10 m using an ADV held at the average height of the surrounding coral benthos (~0.2 m). (c) Three current metres were deployed at Coral Gardens (23°26.698″S, 151°54.533″E) adjacent to where the reef flat measurements of flow velocity were measured, and corals were collected. Metres 1 and 2 were placed on exposed areas of the reef, whereas flow metre 3 was placed in a more sheltered position. Images provided by DigitalGlobe.