Nutrient runoff is one of the major contributors to crown-of-thorns outbreaks.
Crown-of-thorns image from www.shutterstock.com
Despite 15 years of concerted action by the Australian and Queensland governments the health of the reef is not improving and in fact may be continuing to deteriorate.
Soon the oceans will be too warm to support thriving coral reefs.
USFWS - Pacific Region/Flickr
Corals are experiencing only the third global bleaching event in recorded history, caused by warming seas. But worse is yet to come.
Nitrogen pollution is one of the factors driving outbreaks of crown-of-thorns - giant starfish that devour the reef.
Kenneth Taylor Jr/Flickr
The latest Great Barrier Reef report shows some improvements to water quality over the past five years, but there's still a lot to do on one particular problem: nitrogen.
Diving in Indonesia’s Raja Ampat Marine Park to see these clownfish will cost you more than before – but for good reason.
Diving in many parts of Indonesia, Thailand and Malaysia now costs a little more than it used to – but you might be happy to discover why.
The Great Southern Reef is unique, beautiful and contributes significantly to Australia’s culture and economy. However, few of us realise the magnitude and value of this gem right at our doorstep.
T. Wernberg 2002
The Great Southern Reef covers 71,000 square km and contributes more than A$10 billion to Australia's economy each year.
The ornamental snake - one of the two species that the federal government failed to account for when approving the Carmichael mine.
The Federal Court has overturned federal environmental approval of the A$16.5 billion Adani’s coal mine project in central Queensland.
The World Heritage Committee’s deliberations involved far more than a simple tick for the Great Barrier Reef.
Australia was spared the ignominy of having the Great Barrier Reef listed as officially in danger. But comments from member countries of the World Heritage Committee show the world is still worried about it.
The government has convened 16 experts to help deliver its plan to save the Great Barrier Reef.
Ove Hoegh-Guldberg, Global Change Institute, University of Queensland
The government's plan to save the Great Barrier Reef hinges on hitting a series of pollution and conservation targets within just a few years. A new expert panel will advise on how best to get there.
It’s still too early to declare that it’s blue skies for the Great Barrier Reef.
Underwater Earth/Catlin Seaview Survey/Wikimedia Commons
Whether it's on the official "in danger" list or not, the Great Barrier Reef is clearly under threat. UNESCO has placed its faith in Australia, but without urgent action the problems will not go away.
The Australian government's commitments to protecting the reef means it avoids the embarrassing classification - for now.
Australia has persuaded UNESCO it has a plan to save the Great Barrier Reef - now the policies and funds must materialise.
AAP Image/Tourism and Events Queensland
UNESCO's World Heritage Committee has spared Australia's blushes by opting not to list the Great Barrier Reef as 'in danger'. But it has also demanded that Australia make good on its plans to save it.
The Curtis Island gas precinct is one of the biggest developments along the Great Barrier Reef coast.
The coast alongside the Great Barrier Reef is home to ports, farms, holiday resorts, and more than a million people. It all puts pressure on the Reef, and it's time for some firms plans to manage it.
Loggerhead turtle populations are facing a brighter future, but many other species are still in decline, while for others there are no data at all.
AAP Image/Lauren Bath
The Great Barrier Reef is home to some 1,600 species of bony fish, 130 sharks and rays, and turtles, mammals and more. Most have had no population monitoring, meaning we don't know how well they are faring.
When World Heritage sites are under threat, like Florida’s Everglades National Park, they are added to the List of World Heritage in Danger.
The United Nations is set to decide whether to add the Great Barrier Reef to the List of World Heritage in Danger. But what is the list, and what does it mean for the places that are on it?
The MV Shen Neng I spills oil onto the Great Barrier Reef in 2010. Large accidents are rare, but there is still very little monitoring of long-term chronic damage from shipping.
Port traffic near the Great Barrier Reef will more than double by 2025, as coal and other exports grow. While major incidents are rare, the chronic toll on the reef itself still remains largely unknown.
A flood plume containing sediments, nutrients and pesticides flowing onto the Great Barrier Reef from Bundaberg.
AAP Image/James Cook University
Successive plans to curb the sediments, nutrients and pesticides flowing into the waters around the Great Barrier Reef have fallen short, leaving the corals that call the reef home highly vulnerable.
The Great Barrier Reef is one of the most magnificent wonders of our world.
With the United Nations set to decide on whether to list the Great Barrier Reef as officially in danger, we look at the various threats to the reef's survival, starting with the biggie... climate change.
More mines, more roads, as the government puts its drive towards economic development ahead of all else.
AAP Image/Alan Porritt
Amid talk of paths to surplus and investing in infrastructure, both sides of politics seem to have forgotten Australia's longstanding responsibility to govern sustainably, and not just for the economy.
How much money has Greg Hunt been given for Australia’s environmental programs?
AAP Image/Dan Peled
Environment minister Greg Hunt hasn't asked for any more money for the Emissions Reduction Fund. So what is actually in the budget, as far as climate change is concerned?
Tony Abbott and Greg Hunt at last year’s Green Army launch. Funding for the initiative has been slimmed down but is still more than A$700 million.
AAP Image/Britta Campion
The Federal Budget 2015 makes little mention of emissions reductions or renewable energy, but does feature funding boosts for drought assistance and the Great Barrier Reef. What else is in?