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January 18 2012

15:23

On Our Radar: Ailing Rice Coral in Hawaii

The cause of the disease, known as Montipora White Syndrome, remains unknown. It involves the loss of tissues, which exposes the coral's underlying white skeleton.

March 01 2011

23:12

Imperiled Coral Reefs, Gone by 2050?


 

A coral reef turned white by bleaching, a stress reaction to high ocean temperaturesEven now, three-quarters of all coral reefs around the world are threatened. By 2050 “nearly all” coral reefs will be gone unless something is done soon to stop it, according to a report released last week by the World Resources Institute.

Assaulted by warming temperatures, acidifying waters, pollution, and overfishing, coral reefs are aptly described as the “rainforest of the sea,” supporting a vast ecosystem that includes the livelihoods of a half billion people.

Saving the reefs. Think locally, act globally

Following on earlier studies, the new study, called “Reefs at Risk Revisited,” warns that 90 percent of coral reefs will be threatened by 2030, and at least 95 percent by 2050, if action is not taken now to stop it.

The immediate threat to coral is local pressures like pollution, overfishing, agricultural runoff, and coastal development – stresses converging in a “perfect storm of threats to reefs” according to National Oceanic and Atmospheric Administration (NOAA) administrator Jane Lubchenco.

Added to the immediate and local threat is the added stress of  rising temperatures from increased CO2 emissions, leading to widespread coral bleaching events and acidifying oceans.

“Ocean acidification reduces coral growth rates,” the report says, “… and, if unchecked, could reduce their ability to maintain their physical structure.”

Not committed to a world without coral reefs

A world with dead or dying reefs is “not a future we are committed to,” said Lauretta Burke, one of the study’s lead authors. But a commitment to save the reefs through immediate broad action is required to avoid such a future.

Burke urges policymakers to focus on implementing swift measures to ease local pressures on coral reefs – in particular overfishing – and take steps to reduce the greenhouse gas emissions that are quickly raising temperatures and acidifying ocean waters.

Absent such action, at least 500 million people will lose their means of survival along with the coral, much of those in the developing world, along the coasts southeast Asia and the Indian ocean, where last year saw a dramatic coral die-off due to a sudden spike in ocean temperatures.

Coral reefs provide important environmental and economic services, the loss of which is a devastating prospect. Reefs at Risk is, hopefully, a wake-up call for us to do something to avert such a fate.

Reefs at Risk Revisited:
Executive Summary (pdf)
Full Report (pdf)

 

 

 

 

 

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November 06 2010

14:21

Coral Cataclysm Took Scientist by Surprise

Charles Fisher, the chief scientist on an expedition studying coral colonies in the Gulf of Mexico, expected to see some subtle effects from the oil spill. Instead, he found an ecosystem in collapse.

November 05 2010

20:59

Dead Coral Found Near Gulf Oil Well

Scientists took samples and will test for the presence of hydrocarbons, although it is unclear whether such residue would remain.

October 06 2010

22:16

September 27 2010

12:44

August 19 2010

19:05

Warming Seas Threaten Coral Off Indonesia

The bleaching is attributed to a spike in sea temperatures in May that left waters in the area about 7 degrees Fahrenheit above average.

August 18 2010

15:37

July 22 2010

14:35

Malaysia closes diving reefs to save coral

Several world-famous diving sites shut to save the coral.

June 03 2010

16:26

Before and After: Coral as Litmus Test

The only upside (?) to the gulf oil catastrophe is that it offers scientists a rare opportunity to study exactly how a massive release of oil and chemicals a mile underwater impacts deep-sea life.

February 22 2010

11:11

Fishing ban regenerates Australia's Great Barrier Reef

Strict fishing bans have helped regenerate wildlife and coral on one-third of Australia's Great Barrier Reef.
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