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Bred oysters switch shell carbon under acidification
Selectively bred Saccostrea glomerata keep more ordered calcite and can use different DIC pathways than wild-type oysters in acidified Australian estuaries.
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Which oyster species and families were compared?
Saccostrea glomerata families F15 (QX resistance), F30 (fast growth), and wild-type F31.
Source: Selectively bred oysters can alter their biomineralization pathways, promoting resilience to environmental acidification · DOI · quote verified
What pH characterized acidified vs control leases?
Acidified sites ~pH 7.4–7.5; controls 8.2 (Wallis Lake) and 8.1 (Port Stephens).
Source: Selectively bred oysters can alter their biomineralization pathways, promoting resilience to environmental acidification · DOI · quote verified
What happened to seawater δ13C in acidified water?
It was significantly lighter (environment F1,21 = 155.41, p < .001).
Source: Selectively bred oysters can alter their biomineralization pathways, promoting resilience to environmental acidification · DOI · quote verified
How did wild-type crystallography differ from selected families?
Wild-type (F31) calcite showed increased crystallographic disorder versus F15/F30.
Source: Selectively bred oysters can alter their biomineralization pathways, promoting resilience to environmental acidification · DOI · quote verified
What happened to shell δ13C under coastal acidification?
Shell δ13C was significantly lighter (negative) in acidified oysters.
Source: Selectively bred oysters can alter their biomineralization pathways, promoting resilience to environmental acidification · DOI · quote verified
What carbon source is inferred for wild-type shells at control sites?
HCO3−, with shell δ13C between −1‰ and +1‰.
Source: Selectively bred oysters can alter their biomineralization pathways, promoting resilience to environmental acidification · DOI · quote verified
What carbon source is inferred under acidification for wild-type shells?
CO32−, with shell δ13C less than −1‰.
Source: Selectively bred oysters can alter their biomineralization pathways, promoting resilience to environmental acidification · DOI · quote verified
What practical implication do the authors draw?
Selective breeding may partly buffer commercial oysters against climate-driven coastal acidification.
Source: Selectively bred oysters can alter their biomineralization pathways, promoting resilience to environmental acidification · DOI · quote verified
What drove rising pCO2 at these leases?
Freshwater-induced acidification associated with acid sulfate soils, not only atmospheric CO2.
Source: Selectively bred oysters can alter their biomineralization pathways, promoting resilience to environmental acidification · DOI · quote verified
How many oysters were analyzed by SEM vs isotopes?
Of 12 sampled, six were used: three SEM and three isotopes.
Source: Selectively bred oysters can alter their biomineralization pathways, promoting resilience to environmental acidification · DOI · quote verified
Did selected families use the same carbon source at both sites?
Their shell carbon was less than −1‰ at both control and acidified sites, indicating CO32−.
Source: Selectively bred oysters can alter their biomineralization pathways, promoting resilience to environmental acidification · DOI · quote verified