Coral keeps it in the family | Science News



Support credible science journalism.

Subscribe to Science News today.


Coral keeps it in the family

3:53pm, May 2, 2008

For a few days each year, most coral in the Great Barrier Reef spawn all at once, broadcasting buoyant bundles of egg and sperm that float to neighboring coral for fertilization. Now researchers have shown how reefs efficiently trap the huge influx of nutrients. Chock-full of nitrogen and phosphorus, the gametes fuel a bloom of microalgae, which then nourishes other parts of the ecosystem, including fish and bacteria, says Ronnie Glud, a marine biochemist at the Scottish Association for Marine Science. The whole cycle occurs in eight to 10 days. Lucky gametes that don’t get devoured may grow into coral. The sandy bottom is an essential part of nutrient recycling, Glud and his colleagues also report in the current issue of Limnology and Oceanography. “Much of the sand is permeable, so it acts as a biocatalytic filter,” with microbes breaking down the spawn leftovers, he says.

This article is available only to subscribing members. Join the Society today or Log in.

Get Science News headlines by e-mail.

More from Science News

From the Nature Index Paid Content