The Great Barrier Reef will continue to deteriorate, largely to climate change, and the window to secure its future is rapidly closing. That is the sobering conclusion of a major new report into the state of the reef.
The report was released by the Great Barrier Reef Marine Park Authority. It confirms what scientists have long known: humanity is killing the Great Barrier Reef, and other reefs around the world, by failing to curb the greenhouse gas emissions that cause global warming.
Earlier this year, I visited parts of the southern Great Barrier Reef where mass coral bleaching and death had just occurred. The picture was devastating. Vast swathes of coral were bleached a ghostly white. It was interspersed with bright flashes of pink and blue: a final, heartbreaking release of coral pigment as the organism makes a last-ditch effort to survive. I’ve since learned much of that coral is now dead.
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Climate change is not the only threat
The report said climate-driven disturbances are compounding the effects of other chronic damage to the reef from:
- unsustainable fishing
- pollution
- sediment runoff
- outbreaks of crown-of-thorns starfish.
Among other key findings of the report were that:
- most populations of marine turtles have declined
- species such as seabirds, sharks, rays, dugongs and seagrasses have recovered in some areas and plateaued or declined in others
- populations of estuarine crocodiles are recovering
- many species in decline are listed as threatened or protected.
Strong leadership is needed
I first visited the Great Barrier Reef in 1980, as a university student. My interest in it has never waned. It’s one of those incredible bits of nature that defies description.
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The reef’s World Heritage listing is proof of its outstanding global value. Australians love and feel pride in this vast and stunning place. The reef supports the livelihoods and wellbeing of many, including Traditional Owners who have cared for it over thousands of generations. It sustains all of us: economically, culturally and spiritually.
You might see a photo of healthy-looking coral and think the reef must be doing well. But I have seen the problem first-hand over many years. The reef is suffering badly – and every fraction of a degree of global warming compounds the harm.
Humanity must take urgent action to limit global temperature rise. But we are failing. We are failing the Great Barrier Reef and indeed, coral reefs across the planet.
There was a time when governments and reef managers were not willing to admit the extent of the problem. I don’t think that’s the case anymore. As the report states:
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2024 opens a new chapter for the reef. Future warming already locked into the climate system means that further degradation is inevitable. This is the sobering calculus of climate change.
Climate change is a global problem, but Australia is undeniably part of it. This nation cannot export fossil fuels to be burnt overseas if we want to save the Great Barrier Reef. Dealing with this will take strong political leadership, from the prime minister down.
Humanity has all the facts in front of us. Earth is in an unchartered time of very rapid change. If we don’t respond, we will lose the Great Barrier Reef.
