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#371627 - 03/26/10 08:50 AM Complete collapse of reef systems in 100 yrs?
Belize-N-Us Offline
WEST PALM BEACH, Fla. - Coral reefs are dying, and scientists and governments around the world are contemplating what will happen if they disappear altogether.

The idea positively scares them.

Coral reefs are part of the foundation of the ocean food chain. Nearly half the fish the world eats make their homes around them. Hundreds of millions of people worldwide by some estimates, 1 billion across Asia alone depend on them for their food and their livelihoods.

If the reefs vanished, experts say, hunger, poverty and political instability could ensue.

"Whole nations will be threatened in terms of their existence," said Carl Gustaf Lundin of the International Union for the Conservation of Nature.

Numerous studies predict coral reefs are headed for extinction worldwide, largely because of global warming, pollution and coastal development, but also because of damage from bottom-dragging fishing boats and the international trade in jewelry and souvenirs made of coral.

At least 19 percent of the world's coral reefs are already gone, including some 50 percent of those in the Caribbean. An additional 15 percent could be dead within 20 years, according to the National Oceanic and Atmospheric Administration.

Complete collapse a scenario
Old Dominion University professor Kent Carpenter, director of a worldwide census of marine species, warned that if global warming continues unchecked, all corals could be extinct within 100 years.

"You could argue that a complete collapse of the marine ecosystem would be one of the consequences of losing corals," Carpenter said. "You're going to have a tremendous cascade effect for all life in the oceans."

Exotic and colorful, coral reefs aren't lifeless rocks; they are made up of living creatures that excrete a hard calcium carbonate exoskeleton. Once the animals die, the rocky structures erode, depriving fish of vital spawning and feeding grounds.

Experts say cutting back on carbon emissions to arrest rising sea temperatures and acidification of the water, declaring some reefs off limits to fishing and diving, and controlling coastal development and pollution could help reverse, or at least stall, the tide.

Florida, for instance, has the largest unbroken "no-take" zone in the continental U.S. about 140 square miles off limits to fishing in and around Dry Tortugas National Park, a cluster of islands and reefs teeming with marine life about 70 miles off Key West.

Many fishermen oppose such restrictions. And other environmental measures have run into resistance at the state, local, national and international level. On Sunday, during a gathering of the Convention on the International Trade in Endangered Species of Wild Fauna and Flora, restrictions proposed by the U.S. and Sweden on the trade of some coral species were rejected.

Fish as a luxury?
If reefs were to disappear, commonly consumed species of grouper and snapper could become just memories. Oysters, clams and other creatures that are vital to many people's diets would also suffer. And experts say commercial fisheries would fail miserably at meeting demand for seafood.

"Fish will become a luxury good," said Cassandra deYoung of the United Nations Food and Agriculture Organization. "You already have a billion people who are facing hunger, and this is just going to aggravate the situation," she added. "We will not be able to maintain food security around the world."

The economic damage could be enormous. Ocean fisheries provide direct employment to at least 38 million people worldwide, with an additional 162 million people indirectly involved in the industry, according to the U.N.

Coral reefs draw scuba divers, snorkelers and other tourists to seaside resorts in Florida, Hawaii, Southeast Asia and the Caribbean and help maintain some of the world's finest sandy beaches by absorbing energy from waves. Without the reefs, hotels, restaurants and other businesses that cater to tourists could suffer financially.

Crumbling corals
Dec. 13, 2007: Peter Mumby, a University of Exeter researcher, describes the danger of carbon dioxide on coral, using footage off Bonaire in the Caribbean and Heron Island along the Great Barrier Reef.

Many Caribbean countries get nearly half their gross national product from visitors seeking tropical underwater experiences.

People all over the world could pay the price if reefs were to disappear, since some types of coral and marine species that rely on reefs are being used by the pharmaceutical industry to develop possible cures for cancer, arthritis and viruses.

"A world without coral reefs is unimaginable," said Jane Lubchenco, a marine biologist who heads NOAA. "Reefs are precious sources of food, medicine and livelihoods for hundreds of thousands around the world. They are also special places of renewal and recreation for thousands more. Their exotic beauty and diverse bounty are global treasures."

Future full time Belizeans
Tommy & Sonia Blackledge
Magee, MS 601-849-1918

#371691 - 03/26/10 06:25 PM Re: Complete collapse of reef systems in 100 yrs? [Re: Belize-N-Us]
chris45 Offline
Oh no, we won't have to wait one hundred years...
At the Marine Management Area Science program's symposium in Belize City last month, I asked Dr Les Kaufman who is the senior Principal investigator for the MMAS program, in question time at the end, the following question. "If we carry on our present track, will we still be eating fish in thirty years time?" Dr Kaufman with no hesitation said and I quote his exact words "Emphatically, no!"
In their 2008 assessment of the state of the Mesoamerican reef, "Healthy Reefs for Healthy People" reports that over half of the reef is compromised 47% being poor, and 6% being critical, and the future of a further 42% dependent on our future actions (or lack of them)
The causes? unregulated coastal development and tourism,overfishing and poor agricultural practices. it goes on to say that rapid changes are occuring around key population centres and tourism hotspots.
In other words, the degradation and forecast loss of the reef is caused by....US
I invite readers to do a simple piece of math.
Your present age + 30 = ? how will you feel then about no snapper, no grouper filet to eat (of course no diving or fishing), so next to no tourism on AC etc etc.
Makes us think doesn't it?


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