Cosmos

CORAL BLEACHING

- CREDITS: COSMOS MAGAZINE / EDITOR: ANDREW MASTERSON / ART DIRECTOR: ROBYN ADDERLY / EXPERT CONSULTANT: GABRIELLE AHERN ILLUSTRATI­ONS: HARRY SLAGHEKKE / JACKY WINTER GROUP COSMOS MAGAZINE © 2017 COSMOSMAGA­ZINE.COM. AU

Corals share a symbiotic relationsh­ip with tiny marine algae, which produce carbohydra­tes for the coral and themselves to eat, through the process of photosynth­esis. When the coral is stressed from warmer than usual sea temperatur­es, the algae are rejected and the coral turns white. If temperatur­es remain too high for a prolonged period of time, the coral can’t feed itself efficientl­y and eventually dies, allowing algae to grow over the skeleton.

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