Corals' colour indicates its resilience to climate change

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The yellow-green colour morph of a given species is found to resist higher temperatures more effectively than the brown colour morph. FMTNews Coral

One species of coral that is particularly threatened by climate change is Acropora tenuis, known to have three colour morphs: brown, purple and yellow-green.

If you’ve dived in the Pacific Ocean or the Red Sea in recent years, you may have been struck by the amount of white coral reefs. Their aim was to observe the coral over the last two decades and determine their resilience to climate change, as well as the underlying causes.“At first, we thought the difference in resilience might be linked to the corals housing different kinds of symbiotic algae, which photosynthesize for the coral and thus provide the coral with energy.

This difference could be explained by the existence of proteins present at higher levels in the green-coloured corals, helping to protect their symbiotic algae and to withstand higher temperatures.

 

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