Parental effects passed from adults to their offspring have been identified as a source of rapid acclimation that may allow marine populations to persist as our surface oceans continue to decrease in pH. Little is known, however, whether parental effects are beneficial for offspring in the presence of multiple stressors. We exposed adults of the oyster Saccostrea glomerata to elevated CO₂ and examined the impacts of elevated CO₂ (control = 392; 856 µatm) combined with elevated temperature (control = 24; 28°C), reduced salinity (control = 35; 25) and reduced food concentration (control = full; half diet) on their larvae. Adult exposure to elevated CO₂ had a positive impact on larvae reared at elevated CO₂ as a sole stressor, which were 8% larger and developed faster at elevated CO₂ compared with larvae from adults exposed to ambient CO₂. These larvae, however, had significantly reduced survival in all multistressor treatments. This was particularly evident for larvae reared at elevated CO₂ combined with elevated temperature or reduced food concentration, with no larvae surviving in some treatment combinations. Larvae from CO₂-exposed adults had a higher standard metabolic rate. Our results provide evidence that parental exposure to ocean acidification may be maladaptive when larvae experience multiple stressors.

Item Type:	Refereed Article
Keywords:	Sydney rock oyster, Saccostrea glomerata, ocean acidification, parental effects, multiple stressors, ocean acidification, larvae, oyster, temperature
Research Division:	Biological Sciences
Research Group:	Ecology
Research Field:	Marine and estuarine ecology (incl. marine ichthyology)
Objective Division:	Environmental Management
Objective Group:	Coastal and estuarine systems and management
Objective Field:	Coastal or estuarine biodiversity
UTAS Author:	Virtue, P (Associate Professor Patti Virtue)
ID Code:	116458
Year Published:	2017
Web of Science® Times Cited:	56
Deposited By:	Ecology and Biodiversity
Deposited On:	2017-05-10
Last Modified:	2018-05-28
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