Abstract
Recently, it has been suggested that there are conditions under which some coral species appear to be resistant to the effects of ocean acidification. To test if such resistance can be explained by environmental factors such as light and food availability, the present study investigated the effect of 3 feeding regimes crossed with 2 light levels on the response of the coral Porites rus to 2 levels of pCO2 at 28 °C. After 1, 2, and 3 weeks of incubation under experimental conditions, none of the factors—including pCO2—significantly affected area-normalized calcification and biomass-normalized calcification. Biomass also was unaffected during the first 2 weeks, but after 3 weeks, corals that were fed had more biomass per unit area than starved corals. These results suggest that P. rus is resistant to short-term exposure to high pCO2, regardless of food availability and light intensity. P. rus might therefore represent a model system for exploring the genetic basis of tolerance to OA.
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Acknowledgments
We thank D. Brown and B. Lenz for field and laboratory assistance, NSF for financial support (OCE 10-41270), and the Moorea Coral Reef Long Term Ecological Research site (OCE 04-17413 and 10-26852) as well as the Gordon and Betty Moore Foundation for logistic support. This is contribution number 190 of the CSUN Marine Biology Program.
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Communicated by M. G. Chapman.
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Comeau, S., Carpenter, R.C. & Edmunds, P.J. Effects of feeding and light intensity on the response of the coral Porites rus to ocean acidification. Mar Biol 160, 1127–1134 (2013). https://doi.org/10.1007/s00227-012-2165-5
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DOI: https://doi.org/10.1007/s00227-012-2165-5