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Coral bleaching: what it is and why it matters

 Coral bleaching: what it is and why it matters

Coral bleaching is the alarming whitening of reefs caused by corals expelling the algae (zooxanthellae) that live in their tissues. Those algae provide much of the coral’s color and a large share of its energy through photosynthesis. When the relationship breaks down, corals can starve, become more vulnerable to disease, and struggle to recover.

While bleaching can occur naturally after short-term environmental changes, recent decades have seen more frequent and widespread event ... Read more

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