Data

Bleaching prevalence and extent during the 2022 bleaching event on the central Great Barrier Reef (EcoRRAP)

Name: Bleaching prevalence and extent during the 2022 bleaching event on the central Great Barrier Reef (EcoRRAP)
Published: 2025

Australian Institute of Marine Science

Australian Institute of Marine Science (AIMS)

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ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=https://apps.aims.gov.au/metadata/view/4b199e09-4b27-4e74-b3b1-a40849b5b823&rft.title=Bleaching prevalence and extent during the 2022 bleaching event on the central Great Barrier Reef (EcoRRAP)&rft.identifier=https://apps.aims.gov.au/metadata/view/4b199e09-4b27-4e74-b3b1-a40849b5b823&rft.publisher=Australian Institute of Marine Science (AIMS)&rft.description=Understanding variation in coral bleaching responses across environmental gradients, taxa, and colony sizes is important to predict changes in community composition with climate change. Our aim was to quantify how bleaching severity varied with water velocity, cross shelf gradient, degree heating weeks (DHWs), surface complexity, depth, taxa, and colony size during the 2022 mild bleaching event on the central Great Barrier Reef (GBR). During March and April 2022, we surveyed > 7000m2 of reef substrate using photogrammetry, and scored the bleaching severity of more than 5000 coral colonies belonging to 13 taxa. A series of generalised linear mixed effects models were fitted to quantify the relationship between bleaching severity and the key biological and environmental factors. The data includes the following variables: Reef- unique identification for each reef: OCCH - Chicken Reef, OCDA- Davies Reef, OCLB- Little Broadhurst Reef, PA -Palm Islands Exposure- prevailing wind exposure: BA- back (leeward, protected) FR- front (windward, exposed) FL- flank (intermediate exposure) LA- lagoon Zone - depth zone (S = shallow, 3-8 m; D = deep, 9-15 m) Site - unique identification for each site (replicate sites per reef). Labelled as: Reef_Exposure/ReplicateNumber/Zone Plot - unique identification for each 12x6m plot (four replicates per site). Labelled as: Site_PlotReplicate TL_id - colony identification number (unique for each colony within plot) Taxa - taxonomic idenfitication of each colony: Adgt - Acropora digitate spp., Pmas - Porites massive spp., Pver - Pocillopora verrucosa, Acor - Acropora corymbose spp., Lobo_sp - Lobophyllia spp., Menc- Montipora encrusting spp., Gspp- Goniastrea spp., Spis - Stylophora pistillata, Shys- Seriatopora hystrix, Abra- Acropora branching spp., Pdam - Pocillopora damicornis, Plat - Platygyra spp., Atab - Acropora tabular spp. Bleaching - bleaching score: 1 - no bleaching, 2 - 1-50% of the colony area was bleached, 3- 51-95% of the colony area was bleached, 4 - 96-100% of the colony area was bleached, 5 - partial mortality, 6- whole colony mortality. lat - site latitude long - site longitude ubedmean = horizontal water velocity at the bed (m/s). Extracted from Callaghan et al 2023- https://espace.library.uq.edu.au/view/UQ:8246441 . Date_2022 = date of the initial survey in January 2022 Date_bleaching = date of the bleaching survey in March - April 2022 DHW - degree heating weeks (°C-weeks). Extracted from NOAA's daily 5km satellite dervied estimates: https://coralreefwatch.noaa.gov/product/5km/index_5km_dhw.php. rugosity_plane: rugosity at the site, extracted from the reconstructed 3D models fd_fugosity_plane: fractal dimension at the site, extracted from the reconstructed 3D models slope: the slope of the site (in degrees), extracted from the reconstructed 3D models Cross_shelf: cross shelf position (inshore or offshore) log_area : colony area in (m2) (log10)Maintenance and Update Frequency: notPlannedStatement: Bleaching scores were visually assigned to each individual colony from orthomosaics. Shaded colonies, for which bleaching scores could not be reliably assigned, were excluded.&rft.creator=Australian Institute of Marine Science (AIMS) &rft.date=2025&rft.coverage=147.7042027459851,-18.642829437642416 147.7296090010625,-18.644781277499945 147.7296090010625,-18.666575298129015 147.70660604038432,-18.680235793803686 147.68943965181853,-18.672429931056566 147.7042027459851,-18.642829437642416&rft.coverage=146.48872025155026,-18.525515300931712 146.46400065201553,-18.570432886461614 146.47498714069764,-18.66153364670711 146.4955868069766,-18.675845040239786 146.52442633976716,-18.63290723822935 146.5093255172585,-18.57694170078079 146.51344545051427,-18.535932024959557 146.48872025155026,-18.525515300931712&rft.coverage=147.66335174857343,-18.794572064991925 147.63313890469763,-18.799122237453524 147.6200924493876,-18.82219621783037 147.61803248275973,-18.847216532252297 147.632452249155,-18.856638801090583 147.65270858766263,-18.85144037336229 147.66987497622844,-18.829020309525188 147.67914482605397,-18.812122052329 147.66335174857343,-18.794572064991925&rft.coverage=147.69790832770875,-18.937220874580625 147.68572019182704,-18.948261680340377 147.6817719224569,-18.96206166040624 147.686235183484,-18.98105505925105 147.70031162210796,-18.98868427659381 147.71541804404586,-18.99257991233927 147.72812117158458,-18.979756434260945 147.72880782712718,-18.96449683248793 147.7243445661001,-18.951671193352112 147.7137014051893,-18.938519830802335 147.69790832770875,-18.937220874580625&rft_rights=Creative Commons Attribution 3.0 Australia License http://creativecommons.org/licenses/by/3.0/au/&rft_rights=Use Limitation: All AIMS data, products and services are provided as is and AIMS does not warrant their fitness for a particular purpose or non-infringement. While AIMS has made every reasonable effort to ensure high quality of the data, products and services, to the extent permitted by law the data, products and services are provided without any warranties of any kind, either expressed or implied, including without limitation any implied warranties of title, merchantability, and fitness for a particular purpose or non-infringement. AIMS make no representation or warranty that the data, products and services are accurate, complete, reliable or current. To the extent permitted by law, AIMS exclude all liability to any person arising directly or indirectly from the use of the data, products and services.&rft_rights=Attribution: Format for citation of metadata sourced from Australian Institute of Marine Science (AIMS) in a list of reference is as follows: Australian Institute of Marine Science (AIMS). (2024). Bleaching prevalence and extent during the 2022 bleaching event on the central Great Barrier Reef (EcoRRAP). https://apps.aims.gov.au/metadata/view/4b199e09-4b27-4e74-b3b1-a40849b5b823, accessed[date-of-access].&rft_subject=oceans&rft.type=dataset&rft.language=English Access the data

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Use Limitation: All AIMS data, products and services are provided "as is" and AIMS does not warrant their fitness for a particular purpose or non-infringement. While AIMS has made every reasonable effort to ensure high quality of the data, products and services, to the extent permitted by law the data, products and services are provided without any warranties of any kind, either expressed or implied, including without limitation any implied warranties of title, merchantability, and fitness for a particular purpose or non-infringement. AIMS make no representation or warranty that the data, products and services are accurate, complete, reliable or current. To the extent permitted by law, AIMS exclude all liability to any person arising directly or indirectly from the use of the data, products and services.

Attribution: Format for citation of metadata sourced from Australian Institute of Marine Science (AIMS) in a list of reference is as follows: "Australian Institute of Marine Science (AIMS). (2024). Bleaching prevalence and extent during the 2022 bleaching event on the central Great Barrier Reef (EcoRRAP). https://apps.aims.gov.au/metadata/view/4b199e09-4b27-4e74-b3b1-a40849b5b823, accessed[date-of-access]".

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Brief description

Understanding variation in coral bleaching responses across environmental gradients, taxa, and colony sizes is important to predict changes in community composition with climate change. Our aim was to quantify how bleaching severity varied with water velocity, cross shelf gradient, degree heating weeks (DHWs), surface complexity, depth, taxa, and colony size during the 2022 mild bleaching event on the central Great Barrier Reef (GBR). During March and April 2022, we surveyed > 7000m2 of reef substrate using photogrammetry, and scored the bleaching severity of more than 5000 coral colonies belonging to 13 taxa. A series of generalised linear mixed effects models were fitted to quantify the relationship between bleaching severity and the key biological and environmental factors. The data includes the following variables: Reef- unique identification for each reef: OCCH - Chicken Reef, OCDA- Davies Reef, OCLB- Little Broadhurst Reef, PA -Palm Islands Exposure- prevailing wind exposure: BA- back (leeward, protected) FR- front (windward, exposed) FL- flank (intermediate exposure) LA- lagoon Zone - depth zone (S = shallow, 3-8 m; D = deep, 9-15 m) Site - unique identification for each site (replicate sites per reef). Labelled as: Reef_Exposure/ReplicateNumber/Zone Plot - unique identification for each 12x6m plot (four replicates per site). Labelled as: Site_PlotReplicate TL_id - colony identification number (unique for each colony within plot) Taxa - taxonomic idenfitication of each colony: Adgt - Acropora digitate spp., Pmas - Porites massive spp., Pver - Pocillopora verrucosa, Acor - Acropora corymbose spp., Lobo_sp - Lobophyllia spp., Menc- Montipora encrusting spp., Gspp- Goniastrea spp., Spis - Stylophora pistillata, Shys- Seriatopora hystrix, Abra- Acropora branching spp., Pdam - Pocillopora damicornis, Plat - Platygyra spp., Atab - Acropora tabular spp. Bleaching - bleaching score: 1 - no bleaching, 2 - 1-50% of the colony area was bleached, 3- 51-95% of the colony area was bleached, 4 - 96-100% of the colony area was bleached, 5 - partial mortality, 6- whole colony mortality. lat - site latitude long - site longitude ubedmean = horizontal water velocity at the bed (m/s). Extracted from Callaghan et al 2023- https://espace.library.uq.edu.au/view/UQ:8246441 . Date_2022 = date of the initial survey in January 2022 Date_bleaching = date of the bleaching survey in March - April 2022 DHW - degree heating weeks (°C-weeks). Extracted from NOAA's daily 5km satellite dervied estimates: https://coralreefwatch.noaa.gov/product/5km/index_5km_dhw.php. rugosity_plane: rugosity at the site, extracted from the reconstructed 3D models fd_fugosity_plane: fractal dimension at the site, extracted from the reconstructed 3D models slope: the slope of the site (in degrees), extracted from the reconstructed 3D models Cross_shelf: cross shelf position (inshore or offshore) log_area : colony area in (m2) (log10)

Lineage

Maintenance and Update Frequency: notPlanned

Statement: Bleaching scores were visually assigned to each individual colony from orthomosaics. Shaded colonies, for which bleaching scores could not be reliably assigned, were excluded.

Notes

Credit
Fabricius, K

Credit
Ferrari, R

Credit
Toor, M

Credit
Aston, E

Credit
Alvarez-Noriega, M

Credit
Figueira, W

Credit
Krensel, R

Credit
Lechene, M

Credit
Gordon, S

Credit
Becker, M

Modified: 23 06 2025

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Other Information

Data are available via zenodo: https://doi.org/10.5281/zenodo.14752226

doi : https://doi.org/10.5281/zenodo.14752226 DOI Link

GitHub code repository: https://github.com/open-AIMS/2022-Bleaching-central-GBR

uri : https://github.com/open-AIMS/2022-Bleaching-central-GBR External Link

Álvarez-Noriega, M., Aston, E.A., Becker, M., Fabricius, K.E., Figueira, W.F., Gordon, S.E., Krensel, R., Lechene, M.A., Remmers, T., Toor, M. and Ferrari, R. (2025), Challenging Paradigms Around the Role of Colony Size, Taxa, and Environment on Bleaching Susceptibility. Glob Change Biol, 31: e70090. https://doi.org/10.1111/gcb.70090

doi : https://doi.org/10.1111/gcb.70090 DOI Link

global : fe9659f1-12d6-4acf-ab89-67acdd37efe5

Identifiers

global : 4b199e09-4b27-4e74-b3b1-a40849b5b823