Increasing hypoxia on global coral reefs under ocean warming

Pezner, AK; Courtney, TA; Barkley, HC; Chou, WC; Chu, HC; Clements, SM; Cyronak, T; DeGrandpre, MD; Kekuewa, SAH; Kline, DI; Liang, YB; Martz, TR; Mitarai, S; Page, HN; Rintoul, MS; Smith, JE; Soong, K; Takeshita, Y; Tresguerres, M; Wei, Y; Yates, KK; Andersson, AJ

Increasing hypoxia on global coral reefs under ocean warming

Pezner, AK Courtney, TA Barkley, HC Chou, WC Chu, HC Clements, SM Cyronak, T DeGrandpre, MD Kekuewa, SAH Kline, DI Liang, YB Martz, TR Mitarai, S Page, HN Rintoul, MS Smith, JE Soong, K Takeshita, Y Tresguerres, M Wei, Y Yates, KK Andersson, AJ

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Publisher:: NATURE PORTFOLIO
Publication Type:: Journal Article
Citation:: Nature Climate Change, 2023, 13, (4), pp. 403-409
Issue Date:: 2023-04-01

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Field	Value	Language
dc.contributor.author	Pezner, AK
dc.contributor.author	Courtney, TA
dc.contributor.author	Barkley, HC
dc.contributor.author	Chou, WC
dc.contributor.author	Chu, HC
dc.contributor.author	Clements, SM
dc.contributor.author	Cyronak, T
dc.contributor.author	DeGrandpre, MD
dc.contributor.author	Kekuewa, SAH
dc.contributor.author	Kline, DI
dc.contributor.author	Liang, YB
dc.contributor.author	Martz, TR
dc.contributor.author	Mitarai, S
dc.contributor.author	Page, HN
dc.contributor.author	Rintoul, MS
dc.contributor.author	Smith, JE
dc.contributor.author	Soong, K
dc.contributor.author	Takeshita, Y
dc.contributor.author	Tresguerres, M
dc.contributor.author	Wei, Y
dc.contributor.author	Yates, KK
dc.contributor.author	Andersson, AJ
dc.date.accessioned	2024-06-04T00:53:46Z
dc.date.available	2024-06-04T00:53:46Z
dc.date.issued	2023-04-01
dc.identifier.citation	Nature Climate Change, 2023, 13, (4), pp. 403-409
dc.identifier.issn	1758-678X
dc.identifier.issn	1758-6798
dc.identifier.uri	http://hdl.handle.net/10453/179376
dc.description.abstract	Ocean deoxygenation is predicted to threaten marine ecosystems globally. However, current and future oxygen concentrations and the occurrence of hypoxic events on coral reefs remain underexplored. Here, using autonomous sensor data to explore oxygen variability and hypoxia exposure at 32 representative reef sites, we reveal that hypoxia is already pervasive on many reefs. Eighty-four percent of reefs experienced weak to moderate (≤153 µmol O2 kg−1 to ≤92 µmol O2 kg−1) hypoxia and 13% experienced severe (≤61 µmol O2 kg−1) hypoxia. Under different climate change scenarios based on four Shared Socioeconomic Pathways (SSPs), we show that projected ocean warming and deoxygenation will increase the duration, intensity and severity of hypoxia, with more than 94% and 31% of reefs experiencing weak to moderate and severe hypoxia, respectively, by 2100 under SSP5-8.5. This projected oxygen loss could have negative consequences for coral reef taxa due to the key role of oxygen in organism functioning and fitness.
dc.language	English
dc.publisher	NATURE PORTFOLIO
dc.relation.ispartof	Nature Climate Change
dc.relation.isbasedon	10.1038/s41558-023-01619-2
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0401 Atmospheric Sciences, 0406 Physical Geography and Environmental Geoscience, 0502 Environmental Science and Management
dc.title	Increasing hypoxia on global coral reefs under ocean warming
dc.type	Journal Article
utslib.citation.volume	13
utslib.for	0401 Atmospheric Sciences
utslib.for	0406 Physical Geography and Environmental Geoscience
utslib.for	0502 Environmental Science and Management
pubs.organisational-group	University of Technology Sydney
pubs.organisational-group	University of Technology Sydney/Faculty of Science
pubs.organisational-group	University of Technology Sydney/Faculty of Science/School of Life Sciences
utslib.copyright.status	closed_access	*
dc.date.updated	2024-06-04T00:53:43Z
pubs.issue	4
pubs.publication-status	Published
pubs.volume	13
utslib.citation.issue	4

Abstract:

Ocean deoxygenation is predicted to threaten marine ecosystems globally. However, current and future oxygen concentrations and the occurrence of hypoxic events on coral reefs remain underexplored. Here, using autonomous sensor data to explore oxygen variability and hypoxia exposure at 32 representative reef sites, we reveal that hypoxia is already pervasive on many reefs. Eighty-four percent of reefs experienced weak to moderate (≤153 µmol O2 kg−1 to ≤92 µmol O2 kg−1) hypoxia and 13% experienced severe (≤61 µmol O2 kg−1) hypoxia. Under different climate change scenarios based on four Shared Socioeconomic Pathways (SSPs), we show that projected ocean warming and deoxygenation will increase the duration, intensity and severity of hypoxia, with more than 94% and 31% of reefs experiencing weak to moderate and severe hypoxia, respectively, by 2100 under SSP5-8.5. This projected oxygen loss could have negative consequences for coral reef taxa due to the key role of oxygen in organism functioning and fitness.

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http://hdl.handle.net/10453/179376