How does rising atmospheric CO2 affect marine organisms?

Click to locate material archived on our website by topic

Effects of Ocean Acidification on Wound Repairs of Porites Corals

Paper Reviewed
Edmunds, P.J. and Yarid, A. 2017. The effects of ocean acidification on wound repair in the coral Porites spp. Journal of Experimental Marine Biology and Ecology 486: 98-104.

In order to determine how wound repair of injured Porites corals might be influenced by ocean acidification, Edmunds and Yarid (2017) damaged small colonies of massive Porites spp. from the back reef of Moorea, French Polynesia in such a way as to simulate the effects of individual bites of corallivorous fish. More specifically, in experiments lasting 19-20 days and employing superficial or deep lesions, they evaluated the effects of damage at both 400 µatm (ambient) and 1000 µatm PCO2, using calcification and healing as dependent variables. And what did this effort reveal?

The two U.S. researchers report that "the resilience of wound healing in massive Porites spp. may have a threshold around 1000 µatm PCO2 beyond which impairment occurs." And together, therefore, they conclude that their results "suggest that damaged massive Porites spp. will be able to maintain tissue regeneration and perhaps calcification at PCO2 values expected by the end of the current century."

Posted 8 March 2017