Restoring the flat oyster Ostrea angasi in the face of a changing climate

Pereira, RRC; Scanes, E; Parker, LM; Byrne, M; Cole, VJ; Ross, PM

Restoring the flat oyster Ostrea angasi in the face of a changing climate

Pereira, RRC Scanes, E

Parker, LM Byrne, M Cole, VJ Ross, PM

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Publisher:: INTER-RESEARCH
Publication Type:: Journal Article
Citation:: Marine Ecology Progress Series, 2019, 625, pp. 27-39
Issue Date:: 2019-08-29

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Field	Value	Language
dc.contributor.author	Pereira, RRC
dc.contributor.author	Scanes, E https://orcid.org/0000-0001-7520-3804
dc.contributor.author	Parker, LM
dc.contributor.author	Byrne, M
dc.contributor.author	Cole, VJ
dc.contributor.author	Ross, PM
dc.date.accessioned	2022-05-03T10:23:47Z
dc.date.available	2022-05-03T10:23:47Z
dc.date.issued	2019-08-29
dc.identifier.citation	Marine Ecology Progress Series, 2019, 625, pp. 27-39
dc.identifier.issn	0171-8630
dc.identifier.issn	1616-1599
dc.identifier.uri	http://hdl.handle.net/10453/156955
dc.description.abstract	Across the globe, restoration efforts are stemming the loss of native oyster reefs and the ecosystem services they provide, but these efforts will need to consider climate change in order to be sustainable. South-eastern Australia is the focus of restoring the once abundant oyster Ostrea angasi. This region is also a climate change ‘hot spot’ where the ocean is warming rapidly, with the potential to be exacerbated by marine heatwaves and coastal acidification. In this study, the impact of near-future (~2050) elevated temperature and pCO2 on O. angasi was determined and considered in context with concerns for the long-term sustainability of oyster reef restoration efforts. Oysters were exposed to ambient and elevated pCO2 concentrations (mean ± SE: 408 ± 19.8 and 1070 ± 53.4 μatm) and ambient and elevated temperatures (22.78 ± 0.17 and 25.73 ± 0.21°C) for 10 wk in outdoor flow-through mesocosms. Shell growth, condition index, standard metabolic rate (SMR), extracellular pH and survival were measured. Elevated temperature caused high mortality (36%) and decreased the condition of oysters (33%). Elevated pCO2 increased SMR almost 4-fold and lowered the extracellular pH of O. angasi by a mean 0.29 pH units. In combination, elevated pCO2 and temperature ameliorated effects on SMR and survivorship of oysters. O. angasi appears to be living near the limits of its thermal tolerance. Restoration projects will need to account for the temperature sensitivity of this species and its changing habitat to ‘climate proof’ long-term restoration efforts.
dc.language	English
dc.publisher	INTER-RESEARCH
dc.relation.ispartof	Marine Ecology Progress Series
dc.relation.isbasedon	10.3354/meps13047
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0405 Oceanography, 0602 Ecology, 0608 Zoology
dc.subject.classification	Marine Biology & Hydrobiology
dc.title	Restoring the flat oyster Ostrea angasi in the face of a changing climate
dc.type	Journal Article
utslib.citation.volume	625
utslib.for	0405 Oceanography
utslib.for	0602 Ecology
utslib.for	0608 Zoology
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
utslib.copyright.status	closed_access	*
dc.date.updated	2022-05-03T10:23:45Z
pubs.publication-status	Published
pubs.volume	625

Abstract:

Across the globe, restoration efforts are stemming the loss of native oyster reefs and the ecosystem services they provide, but these efforts will need to consider climate change in order to be sustainable. South-eastern Australia is the focus of restoring the once abundant oyster Ostrea angasi. This region is also a climate change ‘hot spot’ where the ocean is warming rapidly, with the potential to be exacerbated by marine heatwaves and coastal acidification. In this study, the impact of near-future (~2050) elevated temperature and pCO2 on O. angasi was determined and considered in context with concerns for the long-term sustainability of oyster reef restoration efforts. Oysters were exposed to ambient and elevated pCO2 concentrations (mean ± SE: 408 ± 19.8 and 1070 ± 53.4 μatm) and ambient and elevated temperatures (22.78 ± 0.17 and 25.73 ± 0.21°C) for 10 wk in outdoor flow-through mesocosms. Shell growth, condition index, standard metabolic rate (SMR), extracellular pH and survival were measured. Elevated temperature caused high mortality (36%) and decreased the condition of oysters (33%). Elevated pCO2 increased SMR almost 4-fold and lowered the extracellular pH of O. angasi by a mean 0.29 pH units. In combination, elevated pCO2 and temperature ameliorated effects on SMR and survivorship of oysters. O. angasi appears to be living near the limits of its thermal tolerance. Restoration projects will need to account for the temperature sensitivity of this species and its changing habitat to ‘climate proof’ long-term restoration efforts.

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http://hdl.handle.net/10453/156955