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Local bleaching thresholds established by remote sensing techniques vary among reefs with deviating bleaching patterns during the 2012 event in the Arabian/Persian Gulf

Local bleaching thresholds established by remote sensing techniques vary among reefs with deviating bleaching patterns during the 2012 event in the Arabian/Persian Gulf
Local bleaching thresholds established by remote sensing techniques vary among reefs with deviating bleaching patterns during the 2012 event in the Arabian/Persian Gulf
A severe bleaching event affected coral communities off the coast of Abu Dhabi, UAE in August/September, 2012. In Saadiyat and Ras Ghanada reefs ~ 40% of the corals showed signs of bleaching. In contrast, only 15% of the corals were affected on Delma reef. Bleaching threshold temperatures for these sites were established using remotely sensed sea surface temperature (SST) data recorded by MODIS-Aqua. The calculated threshold temperatures varied between locations (34.48 °C, 34.55 °C, 35.05 °C), resulting in site-specific deviations in the numbers of days during which these thresholds were exceeded. Hence, the less severe bleaching of Delma reef might be explained by the lower relative heat stress experienced by this coral community. However, the dominance of Porites spp. that is associated with the long-term exposure of Delma reef to elevated temperatures, as well as the more pristine setting may have additionally contributed to the higher coral bleaching threshold for this site.
Coral bleaching, Threshold temperature, Extreme environment, Coral reefs, Zooxanthellae, Symbiodinium, Global change
0025-326X
654-659
Shuail, Dawood
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Wiedenmann, Jörg
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D'angelo, Cecilia
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Baird, Andrew H.
8938a61d-1fec-4bd2-9a6c-a6f6d4ab2560
Pratchett, Morgan S.
e16bd6d7-d0b1-4dc0-b2b2-8f911000f546
Riegl, Bernhard
d8c98f2f-67e8-4c94-bda1-e7cd531a35ce
Burt, John A.
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Petrov, Peter
7ff12367-4166-457e-95b9-199ece869937
Amos, Carl
d0a18a13-bccd-4fdc-8901-aea595d4ed5c
Shuail, Dawood
f0221d9a-e262-4e9f-b365-41276575a94b
Wiedenmann, Jörg
ad445af2-680f-4927-90b3-589ac9d538f7
D'angelo, Cecilia
0d35b03b-684d-43aa-a57a-87212ab07ee1
Baird, Andrew H.
8938a61d-1fec-4bd2-9a6c-a6f6d4ab2560
Pratchett, Morgan S.
e16bd6d7-d0b1-4dc0-b2b2-8f911000f546
Riegl, Bernhard
d8c98f2f-67e8-4c94-bda1-e7cd531a35ce
Burt, John A.
9640a507-caa5-4ee3-a8bf-bec34d6a4fb8
Petrov, Peter
7ff12367-4166-457e-95b9-199ece869937
Amos, Carl
d0a18a13-bccd-4fdc-8901-aea595d4ed5c

Shuail, Dawood, Wiedenmann, Jörg, D'angelo, Cecilia, Baird, Andrew H., Pratchett, Morgan S., Riegl, Bernhard, Burt, John A., Petrov, Peter and Amos, Carl (2016) Local bleaching thresholds established by remote sensing techniques vary among reefs with deviating bleaching patterns during the 2012 event in the Arabian/Persian Gulf. Marine Pollution Bulletin, 105 (2), 654-659. (doi:10.1016/j.marpolbul.2016.03.001).

Record type: Article

Abstract

A severe bleaching event affected coral communities off the coast of Abu Dhabi, UAE in August/September, 2012. In Saadiyat and Ras Ghanada reefs ~ 40% of the corals showed signs of bleaching. In contrast, only 15% of the corals were affected on Delma reef. Bleaching threshold temperatures for these sites were established using remotely sensed sea surface temperature (SST) data recorded by MODIS-Aqua. The calculated threshold temperatures varied between locations (34.48 °C, 34.55 °C, 35.05 °C), resulting in site-specific deviations in the numbers of days during which these thresholds were exceeded. Hence, the less severe bleaching of Delma reef might be explained by the lower relative heat stress experienced by this coral community. However, the dominance of Porites spp. that is associated with the long-term exposure of Delma reef to elevated temperatures, as well as the more pristine setting may have additionally contributed to the higher coral bleaching threshold for this site.

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Accepted/In Press date: 1 March 2016
Published date: 30 April 2016
Keywords: Coral bleaching, Threshold temperature, Extreme environment, Coral reefs, Zooxanthellae, Symbiodinium, Global change
Organisations: Ocean and Earth Science

Identifiers

Local EPrints ID: 390627
URI: http://eprints.soton.ac.uk/id/eprint/390627
ISSN: 0025-326X
PURE UUID: d1894450-c945-4ec7-94d7-b9a38fc654e3
ORCID for Jörg Wiedenmann: ORCID iD orcid.org/0000-0003-2128-2943

Catalogue record

Date deposited: 01 Apr 2016 08:47
Last modified: 09 Jan 2022 03:24

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Contributors

Author: Dawood Shuail
Author: Andrew H. Baird
Author: Morgan S. Pratchett
Author: Bernhard Riegl
Author: John A. Burt
Author: Peter Petrov
Author: Carl Amos

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