Stapp, Laura; Parker, Laura M; O'Connor, Wayne A; Bock, Christian; Ross, Pauline M; Pörtner, Hans-Otto; Lannig, Gisela (2017): OA sensitivity differs between populations of the Sydney Rock oyster. PANGAEA, https://doi.org/10.1594/PANGAEA.884093, Supplement to: Stapp, L et al. (2018): Sensitivity to ocean acidification differs between populations of the Sydney rock oyster: Role of filtration and ion-regulatory capacities. Marine Environmental Research, 135, 103-113, https://doi.org/10.1016/j.marenvres.2017.12.017
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Understanding mechanisms of intraspecific variation in resilience to environmental drivers is key to predict species' adaptive potential. Recent studies show a higher CO2 resilience of Sydney rock oysters selectively bred for increased growth and disease resistance ('selected oysters') compared to the wild population. We tested whether the higher resilience of selected oysters correlates with an increased ability to compensate for CO2-induced acid-base disturbances. After 7 weeks of exposure to elevated seawater PCO2 (1100 µatm), wild oysters had a lower extracellular pH (pHe = 7.54 ± 0.02 (control) vs. 7.40 ± 0.03 (elevated PCO2)) and increased hemolymph PCO2 whereas extracellular acid-base status of selected oysters remained unaffected. However, differing pHe values between oyster types were not linked to altered metabolic costs of major ion regulators (Na+/K+-ATPase, H+-ATPase and Na+/H+-exchanger) in gill and mantle tissues. Our findings suggest that selected oysters possess an increased systemic capacity to eliminate metabolic CO2, possibly through higher and energetically more efficient filtration rates and associated gas exchange. Thus, effective filtration and CO2 resilience might be positively correlated traits in oysters.
Latitude: -32.700000 * Longitude: 152.050000
Date/Time Start: 2015-03-01T00:00:00 * Date/Time End: 2015-03-31T00:00:00
Datasets listed in this publication series
- Stapp, L; Parker, LM; O'Connor, WA et al. (2017): Condition factor of wild and selected Saccostrea glomerata. https://doi.org/10.1594/PANGAEA.884090
- Stapp, L; Parker, LM; O'Connor, WA et al. (2017): Extracellular acid-base parameters of wild and selected Saccostrea glomerata. https://doi.org/10.1594/PANGAEA.884091
- Stapp, L; Parker, LM; O'Connor, WA et al. (2017): Morphological data of experimental animals of wild and selected Saccostrea glomerata. https://doi.org/10.1594/PANGAEA.884088
- Stapp, L; Parker, LM; O'Connor, WA et al. (2017): Seawater carbonate chemistry during the 7 week incubation experiment. https://doi.org/10.1594/PANGAEA.884087
- Stapp, L; Parker, LM; O'Connor, WA et al. (2017): Tisssue respiration and fractional contribution of ion transporters to total tissue respiration of wild and selected oysters Saccostrea glomerata. https://doi.org/10.1594/PANGAEA.884107