Rising sea temperatures and overfishing threaten coral reefs in the western Indian Ocean with complete collapse in the next 50 years, according to a groundbreaking study of these marine ecosystems. The findings, published in the journal Nature Sustainability on Monday, warned that reefs along the eastern coast of Africa and island nations like Mauritius and Seychelles faced a high risk of extinction unless urgent action was taken. For the first time, researchers were able to assess the vulnerability of individual reefs across the vast western reaches of the Indian Ocean, and identify the main …

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