Saving Coral Reefs — with Sex

To keep pace with environmental loss, scientists working to restore tropical reefs have turned their attention to coral reproduction and increasing diversity.

Visitors walk slowly through a room of dimmed lights and glowing tanks that bring the mysteries of the sea into plain view. The Steinhart Aquarium at the California Academy of Sciences in San Francisco is home to 900 different species — everything from brightly colored reef fish to prickly sea urchins, even an albino alligator named Claude.

But some of the most exciting things to see are out of the public’s view.

In a specially constructed darkroom in one of the labs, scientists are coaxing corals to spawn and studying how to increase the chances of survivorship for baby corals. It’s all part of a larger effort to give threatened reefs — and all the species that depend on them — a fighting chance.

Reefs at Risk

Shallow tropical reefs face a long list of threats including overfishing, disease and pollution, but one of the biggest dangers is climate change, which is contributing to rising sea surface temperatures and increasing ocean acidification. It’s estimated that in the past 30 years half the world’s coral reefs have died and by the end of the century we could lose 90 percent.

That’s bad news for millions of people and marine life.

Coral reefs have important biodiversity and economic values. Reefs are like rainforests, providing food and shelter to thousands of other species. Coral reefs cover just 0.1 percent of the ocean floor, but they host more than 25 percent of the ocean’s biodiversity. “So if we lose them, then we lose a disproportionate amount of biodiversity,” says Rebecca Albright, a coral reef biologist who co-leads the California Academy of Science’s Hope for Reefs initiative that works on researching and restoring coral reefs.

Read More

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From The Publisher:
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