Great Barrier Reef losses 50%: report - New York Daily News [fornadablog.blogspot.com]
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[fornadablog.blogspot.com], Great Barrier Reef losses 50%: report - New York Daily News
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A Hawksbill sea turtle is swimming near Lady Elliot Island. The island is one of the three island resorts in the Great Barrier Reef Marine Park. Some 50 percent of the Great Barrier Reef has vanished in under three decades, a study shows.
Australia's Great Barrier Reef, the world’s largest coral reef ecosystem, has been reduced by 50 percent over the past 27 years, a new study found.
The reef is vanishing due to climate change, predatory starfish and intense cyclones linked to a warming of the oceans, according to scientists from the Australian Institute of Marine Sciences (AIMS) and the University of Wollongong.
Coral cover could fall to just 5 percent in the next decade,the study warns.
“This loss of over half of initial cover is of great concern, signifying habitat loss for the tens of thousands of species associated with tropical coral reefs," the study released on Tuesday said.
Australia’s Great Barrier Reef is one of the seven wonders of the natural world and the only living thing on Earth visible from space. Stretching for 1800 miles parallel to Australia’s northeastern coast, it is a breeding area for humpback whales, home to thousands of sea species and is the biggest single structure made by living organisms.
Coral reefs have been disappearing around the world but the pace of decline of the Great Barrier Reef has been more pronounced, especially since 2006, scientists said.
"In terms of geographic scale and the extent of the decline, it is unprecedented anywhere in the world," AIMS chief John Gunn told Reuters.
Mark Kolbe/Getty Images
“This loss of over half of initial cover is of great concern, signifying habitat loss for the tens of thousands of species associated with tropical coral reefs," says the Australian Institute of Marine Sciences study.
Normally resilient, a coral reef can recover in 10 to 20 years from an extreme storm or bleaching â€" caused by warmer sea temperatures.
But an increased frequency in cyclones â€" 34 in total since 1985 â€" have caused nearly half the losses of the Great Barrier Reef, the report found.
So scientists are pushing for immediate attention in two other areas â€" cutting both greenhouse gas emissions and the predatory starfish population.
“We can't stop the storms but perhaps we can stop the starfish," AIMS chief John Gunn said.
Experts say reducing carbon dioxide (CO2) emissions must be an immediate priority.
Carbon dioxide is released into the atmosphere during the burning of fossil fuels and part of that gas is absorbed by the oceans. This leads to ocean acidification, disrupting the ability of corals to build their calcium carbonate structures, scientists said.
Another short-term option is through managing the growing starfish population, which has been boosted by nutrient-rich runoff from agriculture in the region, LiveScience reported.
Katharina Fabricius, a coral reef ecologist, told LiveScience that the introduction of “natural starfish disease,†could be an option.
"Starfish normally are rare," Fabricius said. "We want to help Mother Nature keep them rare.â€
vcavaliere@nydailynews.com
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Question by Milk: Apparently a subject called "technology" is now taught in S.A. high schools. What exactly is taught in it? Apparently a subject called "technology" is now taught in South African high schools. What exactly is taught this subject? The name is just so broad! Is it what we used to refer to as technical drawing? Thanks to all who answer. Thanks to everyone for these great answers. It seems that you were all taught rather different things. - Is the course content largely up to the teacher in question? Best answer for Apparently a subject called "technology" is now taught in S.A. high schools. What exactly is taught in it?:
Answer by Byron Mulder Answer by Rosaudio Answer by moya
What I remember was we did technical drawings and designs and built structures. We also looked into nutrition and food
You do it in up until Grade 10. Basically involves Woodwork.. building structures and plastics.
It has alot to do with basic engineering - history, inventions etc.
Related Apparently a subject called "technology" is now taught in S.A. high schools. What exactly is taught in it? Topics
Fantastic video on the progression of information technology, researched by Karl Fisch, Scott McLeod, and Jeff Brenman, remixed By the way, I did not create this video! Search on the names above if you want more info - they are responsible. Did You Know?
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