The planet’s coral reefs are facing a number of challenges, including coral bleaching.
Alongside their vivid beauty, coral reefs have an important role to play in the natural world.
According to the National Oceanic and Atmospheric Administration, around one quarter of the ocean's fish rely on healthy coral reefs."Fishes and other organisms shelter, find food, reproduce, and rear their young in the many nooks and crannies formed by corals," it adds. As well as being a source for food and what it calls"new medicines," the NOAA says coral reefs offer protection to coastlines from erosion and storms as well as providing local communities with jobs.
Despite their significance, the planet's coral reefs are facing a number of challenges, including coral bleaching. In March, Australia's Great Barrier Reef Marine Park Authority, which manages the Great Barrier Reef Marine Park, confirmed a fourth mass bleaching event since 2016. , bleaching is what happens when corals are placed under stress, get rid of very small photosynthetic algae — known as zooxanthellae — and start to starve.The authority's factsheet cites the most common reason for bleaching as being"sustained heat stress, which is occurring more frequently as our climate changes and oceans become warmer.
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