Understanding Coral Bleaching: Causes, Impacts, and the Urgent Need for Climate Action
This article from Ocean Conservancy explains the phenomenon of coral bleaching and its devastating effects on marine ecosystems. Coral reefs, often called the rainforests of the sea, support approximately 25% of all ocean species despite covering less than 1% of the ocean floor. They also provide critical coastal protection for hundreds of millions of people. Bleaching occurs when stressed corals expel symbiotic algae known as zooxanthellae due to factors like pollution and ocean warming, causing them to turn white and potentially die. The text highlights that human-driven ocean warming is the primary threat, with 77% of global reef areas currently affected by heat stress. The Great Barrier Reef serves as a stark example, having experienced its sixth mass bleaching event in 2025. With the planet on track for significant warming, up to 99% of coral reefs could be lost. The article emphasizes that mitigating this crisis requires immediate ocean climate action to reduce anthropogenic greenhouse gas emissions and protect these vital ecosystems from irreversible damage.
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Understanding Coral Bleaching: Causes, Impacts, and the Urgent Need for Climate Action
This article from Ocean Conservancy explains the phenomenon of coral bleaching and its devastating effects on marine ecosystems. Coral reefs, often called the rainforests of the sea, support approximately 25% of all ocean species despite covering less than 1% of the ocean floor. They also provide critical coastal protection for hundreds of millions of people. Bleaching occurs when stressed corals expel symbiotic algae known as zooxanthellae due to factors like pollution and ocean warming, causing them to turn white and potentially die. The text highlights that human-driven ocean warming is the primary threat, with 77% of global reef areas currently affected by heat stress. The Great Barrier Reef serves as a stark example, having experienced its sixth mass bleaching event in 2025. With the planet on track for significant warming, up to 99% of coral reefs could be lost. The article emphasizes that mitigating this crisis requires immediate ocean climate action to reduce anthropogenic greenhouse gas emissions and protect these vital ecosystems from irreversible damage.
Ocean Conservancy