Global warming is blamed for first collapse of a Caribbean coral reef

A A A

Scientists have for the first time documented the killing of a coral reef in the Caribbean by global warming. They warn that it could herald a widerdestruction of the world's coral population.

The central barrier reef off Belize has suffered a mass die-off since scientists recorded the highest sea temperatures there in 1998, which resulted in widespread coral "bleaching". Richard Aronson, a marine biologist at the Dauphin Island Sea Lab in Alabama, working with colleagues at the Smithsonian Institution in Washington DC, describes in the journal Nature the first complete collapse of a coral reef in the Caribbean from bleaching.

The lettuce coral was the most abundant coral species living on the central Belizean lagoon in 1998, yet surveys in subsequent years showed that virtually all living colonies had been bleached white at almost every depth investigated.

Cores drilled into the coral showed a similar bleaching had not taken place in the past 3,000 years, indicating that the mass killing was unprecedented in recent history. Dr Aronson said: "1998 was the hottest year on record in the tropical oceans of the world. The high temperatures were created by a combination of El Niño conditions and continuing global warming. This caused coral bleaching worldwide.

"In Belize, coral populations in lagoonal habitats were killed by the bleaching, and this is the first time that anyone has observed a mass coral kill related to bleaching in the Caribbean."

Extensive coral bleaching has already been recorded elsewhere in the Pacific and Indian oceans. Marine biologists believe high temperatures cause a breakdown of the relationships between the coral animal - a sea anemone-like creature - and the microscopic algae that live in its chalky "skeleton". When sea temperatures reach 30C, the coral expels about 90 per cent of the algae, causing the colony to lose its colour. The reef can recover but is weakened and a second bleaching episode can kill it.

Dr Aronson said: "In the Belizean lagoon in 1998, the high water temperatures lasted for many months, causing the corals to bleach and then die. They were too stressed by the high temperatures to survive and regain their algae."

The case of the lost Belizean coral justifies the growing concern about global coral degradation caused by the Earth's ever-warmer climate, Dr Aronson said.

PROMOTED VIDEO
Have you tried new the Independent Digital Edition apps?
News
Tangerine Dream Edgar Froese
people
News
Rob Lowe
peopleRob Lowe hits out at Obama's snub of Benjamin Netanyahu
News
Davies (let) says: 'Everybody thought we were having an affair. It was never true!'
people'Our friendship flourished online. You can share some very revelatory moments at four in the morning…'
Arts and Entertainment
Over their 20 years, the band has built a community of dedicated followers the world over
music
News
Staff assemble outside the old City Road offices in London
mediaThe stories, the writers and the changes over the last quarter of a century at Britain's youngest paper
Life and Style
The Oliver twins, Philip and Andrew, at work creating the 'Dizzy' arcade-adventure games in 1988
techDocumentary looks back at origins of the computer-games industry
Arts and Entertainment
Krall says: 'My hero player-singer is Elton John I used to listen to him as a child, every single record
music
News
Friends for life … some professionals think loneliness is more worrying than obesity
scienceSocial contact is good for our sense of wellbeing - but it's a myth that loneliness kills, say researchers
Arts and Entertainment
The Wu-Tang Clan will sell only one copy of their album Once Upon A Time In Shaolin
musicWu-Tang Clan and The Sexual Objects offer fans a chance to own only copies of their latest albums
News
i100
Environment
Number so freshwater mussels in Cumbria have plummeted from up to three million in the 20th century to 500,000
environment
Latest stories from i100
Have you tried new the Independent Digital Edition apps?
iJobs Job Widget
iJobs General

Austen Lloyd: Private Client Solicitor - Oxford

Excellent Salary : Austen Lloyd: OXFORD - REGIONAL FIRM - An excellent opportu...

Austen Lloyd: Clinical Negligence Associate / Partner - Bristol

Super Package: Austen Lloyd: BRISTOL - SENIOR CLINICAL NEGLIGENCE - An outstan...

Recruitment Genius: Sales Consultant - Solar Energy - OTE £50,000

£15000 - £50000 per annum: Recruitment Genius: Fantastic opportunities are ava...

Recruitment Genius: Compute Engineer

Negotiable: Recruitment Genius: A Compute Engineer is required to join a globa...

Day In a Page

Iraq invasion 2003: The bloody warnings six wise men gave to Tony Blair as he prepared to launch poorly planned campaign

What the six wise men told Tony Blair

Months before the invasion of Iraq in 2003, experts sought to warn the PM about his plans. Here, four of them recall that day
25 years of The Independent on Sunday: The stories, the writers and the changes over the last quarter of a century

25 years of The Independent on Sunday

The stories, the writers and the changes over the last quarter of a century
Homeless Veterans appeal: 'Really caring is a dangerous emotion in this kind of work'

Homeless Veterans appeal

As head of The Soldiers' Charity, Martin Rutledge has to temper compassion with realism. He tells Chris Green how his Army career prepared him
Wu-Tang Clan and The Sexual Objects offer fans a chance to own the only copies of their latest albums

Smash hit go under the hammer

It's nice to pick up a new record once in a while, but the purchasers of two latest releases can go a step further - by buying the only copy
Geeks who rocked the world: Documentary looks back at origins of the computer-games industry

The geeks who rocked the world

A new documentary looks back at origins of the computer-games industry
Belle & Sebastian interview: Stuart Murdoch reveals how the band is taking a new direction

Belle & Sebastian is taking a new direction

Twenty years ago, Belle & Sebastian was a fey indie band from Glasgow. It still is – except today, as prime mover Stuart Murdoch admits, it has a global cult following, from Hollywood to South Korea
America: Land of the free, home of the political dynasty

America: Land of the free, home of the political dynasty

These days in the US things are pretty much stuck where they are, both in politics and society at large, says Rupert Cornwell
A graphic history of US civil rights – in comic book form

A graphic history of US civil rights – in comic book form

A veteran of the Fifties campaigns is inspiring a new generation of activists
Winston Churchill: the enigma of a British hero

Winston Churchill: the enigma of a British hero

A C Benson called him 'a horrid little fellow', George Orwell would have shot him, but what a giant he seems now, says DJ Taylor
Growing mussels: Precious freshwater shellfish are thriving in a unique green project

Growing mussels

Precious freshwater shellfish are thriving in a unique green project
Diana Krall: The jazz singer on being friends with Elton John, outer space and skiing in Dubai

Diana Krall interview

The jazz singer on being friends with Elton John, outer space and skiing in Dubai
Pinstriped for action: A glimpse of what the very rich man will be wearing this winter

Pinstriped for action

A glimpse of what the very rich man will be wearing this winter
Russell T Davies & Ben Cook: 'Our friendship flourished online. You can share some very revelatory moments at four in the morning…'

Russell T Davies & Ben Cook: How we met

'Our friendship flourished online. You can share some very revelatory moments at four in the morning…'
Bill Granger recipes: Our chef serves up his favourite Japanese dishes

Bill Granger's Japanese recipes

Stock up on mirin, soy and miso and you have the makings of everyday Japanese cuisine
Michael Calvin: How we need more Eric Cantonas to knock some sense into us

Michael Calvin's Last Word

How we need more Eric Cantonas to knock some sense into us