But as promising and effective as these techniques are, they dont take away the need to deal with the root causes of coral bleaching and death.
But as promising and effective as these techniques are, they don't take away the need to deal with the root causes of coral bleaching and death.
The Ocean Agency/XL Catlin Seaview Survey/Richard Vevers
Corals might look like curious oddities — the strange organisms are animals but have the appearance of plants out of a science-fiction universe.
But these animals are essential to the health of the ocean as we know it.
Because of that, corals are far more important to people than many realize. Yet they're dying rapidly: According to some estimates, 50% of the world's coral has died in the past 30 years. Reefs are being wiped out by pollution from cities and farms and destroyed by fishing practices. Most importantly, as the world's temperature rises, oceans are absorbing vast amounts of heat and carbon dioxide. That means they're becoming warmer and more acidic faster than corals can adapt.
This could have serious consequences. A recent study outlined 31 of the essential services that marine ecosystems provide to people. These range from the obvious — like seafood and areas for tourism — to benefits that are far less straightforward but essential: at least 50% of the oxygen we breathe comes from a healthy ocean.
Reefs cover less than 1% of the ocean floor, yet 25% of fish species spend some part of their life cycles in them, making corals absolutely essential to ocean health. Estimates of the overall economic value of reefs suggest they contribute between billion and more than 5 billion to the world economy annually, though some scientists say those figures are far too low.
So there are pressing reasons to save the world's coral. In the long term, that will require we limit climate change so ocean temperatures and acidity stop spiking. But researchers have also devised ways to try to help dead reefs bounce back more quickly.
Biologists have designed ways to grow corals, either in labs or in special underwater farms, at rates far faster than they naturally grow in the wild. In some cases, they've identified corals that are particularly resilient to warm or acidic water and focused on nurturing those. Then scientists take those newly grown corals and replant them on natural reefs to try to bring them back.
Here's how it works.
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