Mass coral bleaching events caused by elevated seawater temperatures^{1, 2} have resulted in extensive coral mortality throughout the tropics over the past few decades^{3, 4}. With continued global warming, bleaching events are predicted to increase in frequency and severity, causing up to 60% coral mortality globally within the next few decades^{4, 5, 6}. Although some corals are able to recover and to survive bleaching^{7, 8}, the mechanisms underlying such resilience are poorly understood. Here we show that the coral host has a significant role in recovery and resilience. Bleached and recovering Montipora capitata (branching) corals met more than 100% of their daily metabolic energy requirements by markedly increasing their feeding rates and CHAR (per cent contribution of heterotrophically acquired carbon to daily animal respiration), whereas Porites compressa (branching) and Porites lobata (mounding) corals did not. These findings suggest that coral species with high-CHAR capability during bleaching and recovery, irrespective of morphology, will be more resilient to bleaching events over the long term, could become the dominant coral species on reefs, and may help to safeguard affected reefs from potential local and global extinction.

1. Department of Geological Sciences, Ohio State University, Columbus, Ohio 43210, USA
2. Department of Biology, Villanova University, Villanova, Pennsylvania 19085, USA
3. Department of Ecology and Evolutionary Biology, Brown University, Providence, Rhode Island 02912, USA

Correspondence to: Andréa G. Grottoli¹ Correspondence and requests for materials should be addressed to A.G.G. (Email: grottoli.1@osu.edu).

Received 4 November 2005 | Accepted 3 January 2006

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