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

Pereira, Roberta R. C.; Scanes, Elliot; Parker, Laura M.; Byrne, Maria; Cole, Victoria J.; Ross, Philip E.

doi:10.3354/meps13047

Cited by 14 publications

(10 citation statements)

References 72 publications

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“…Globally and across Australia efforts are being made to restore oyster reefs [31,69,70]. Climate change will impact on oyster reef restoration [36]. Projected ocean warming for the region (4˚C) as well as contemporary marine heat waves, as seen in the region recently [39] are an important consideration for reef restoration efforts in southeast Australia.…”

Section: Plos Onementioning

confidence: 99%

“…Our results indicate that habitat warming will be a greater threat to O. angasi than S. glomerata. As ocean warming will not act alone, oyster reef restoration is at risk from multiple stressors including ocean acidification, salinity, and other environmental pollutants which will act simultaneously [36]. These co-occurring stressors further threaten native species of oysters and other marine organisms and so mitigation strategies to build oyster resilience will be critical.…”

Section: Plos Onementioning

confidence: 99%

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Can prior exposure to stress enhance resilience to ocean warming in two oyster species?

et al. 2020

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Securing economically and ecologically significant molluscs, as our oceans warm due to climate change, is a global priority. South eastern Australia receives warm water in a strengthening East Australia Current and so resident species are vulnerable to elevated temperature and marine heat waves. This study tested whether prior exposure to elevated temperature can enhance resilience of oysters to ocean warming. Two Australian species, the flat oyster, Ostrea angasi, and the Sydney rock oyster, Saccostrea glomerata, were obtained as adults and "heat shocked" by exposure to a dose of warm water in the laboratory. Oysters were then transferred to elevated seawater temperature conditions where the thermal outfall from power generation was used as a proxy to investigate the impacts of ocean warming. Shell growth, condition index, lipid content and survival of flat oysters and condition of Sydney rock oysters were all significantly reduced by elevated seawater temperature in the field. Flat oysters grew faster than Sydney rock oysters at ambient temperature, but their growth and survival was more sensitive to elevated temperature. "Stress inoculation" by heat shock did little to ameliorate the negative effects of increased temperature, although the survival of heat-shocked flat oysters was greater than non-heat shocked oysters. Further investigations are required to determine if early exposure to heat stress can enhance resilience of oysters to ocean warming. OPEN ACCESSCitation: Pereira RRC, Scanes E, Gibbs M, Byrne M, Ross PM (2020) Can prior exposure to stress enhance resilience to ocean warming in two oyster species? PLoS ONE 15(4): e0228527. https://doi.

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Section: Plos Onementioning

confidence: 99%

Section: Plos Onementioning

confidence: 99%

Can prior exposure to stress enhance resilience to ocean warming in two oyster species?

et al. 2020

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show abstract

“…Globally and across Australia efforts are being made to restore oyster reefs [31,66,67]. Climate change will impact on oyster reef restoration [36]. Projected ocean warming for the region (4°C) as well as contemporary marine heat waves, as seen in the region recently [39] are an important consideration for reef restoration efforts along the south-eastern coastline of Australia.…”

Section: Discussionmentioning

confidence: 99%

“…Our results indicate that habitat warming will be a greater threat to O. angasi compared to S. glomerata. As ocean warming will not act alone, oyster reef restoration is at risk from multiple stressors including ocean acidification, salinity, and other environmental pollutants which will act simultaneously [36]. These co-occurring stressors further threaten native species of oysters, other molluscs and marine organisms and so mitigation strategies to build oyster resilience will be critical.…”

Section: Discussionmentioning

confidence: 99%

“…O. angasi are mostly found subtidally in comparatively stable thermal conditions [30]. These species are both currently the focus of reef restoration efforts along the south eastern coastline of Australia [31, 32] and are known to be vulnerable to acidification [33,34,35] and warming [33, 36]. South-eastern Australia receives warmer waters from the Coral Sea via the East Australian Current (EAC), which is strengthening [37, 38].…”

Section: Introductionmentioning

confidence: 99%

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Can early exposure to stress enhance resilience to ocean warming in two oyster species?

Pereira

Scanes

Gibbs

et al. 2020

Preprint

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7Securing economically and ecologically significant molluscs, as our oceans warm and acidify 8 due to climate change, is a global priority. South eastern Australia receives warm water in a 9 strengthening East Australia Current and so resident species are vulnerable to elevated 10 temperature and marine heat waves. This study tested whether oysters pre exposed to 11 elevated temperature or heat stress enhances resilience to ocean warming later in life. Two 12 Australian species, the flat oyster, Ostrea angasi, and the Sydney rock oyster, Saccostrea 13 glomerata, were given a mild dose of warm water or "heat shock" stress in the laboratory 14 and then transferred to elevated temperature conditions where we used the thermal outfall 15 from power generation as a proxy to investigate the impacts of ocean warming. Shell 16 growth, condition index, lipid content and profile and survival of oysters was impacted by 17 elevated temperature in the field, with flat oysters being more impacted than Sydney rock 18 oysters. Flat oysters grew faster than Sydney rock oysters at ambient temperature, but were 19 more sensitive to elevated temperature. Early exposure to heat stress did little to 20 ameliorate the negative effects of increased temperature, although the survival of heat 21 shocked flat oysters was greater than non-heat shocked oysters. Further investigations are 22 required to determine if early exposure to heat stress can act to inoculate oysters to future 23 stress and overall enhance resilience of oysters to ocean warming. 24 45

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Genetic structure and effective population size of Sydney rock oysters in eastern Australia

et al. 2021

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

Cited by 14 publications

References 72 publications

Can prior exposure to stress enhance resilience to ocean warming in two oyster species?

Can prior exposure to stress enhance resilience to ocean warming in two oyster species?

Can early exposure to stress enhance resilience to ocean warming in two oyster species?

Genetic structure and effective population size of Sydney rock oysters in eastern Australia

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