Australian Politics Forum

Great Barrier Reef election battle brews amid fears of more coral bleaching

Brisbane Times
January 7, 2022

The government agency that oversees the Great Barrier Reef has warned it is at risk of another summer of coral bleaching as the major parties prepare for an election campaign clash over management of the natural wonder.

Visiting Queensland on Friday, Labor leader Anthony Albanese attacked the government’s environmental record as he pledged $163 million for conservation and to dismantle the controversial Great Barrier Reef Foundation championed by former prime minister Malcolm Turnbull.

The Great Barrier Reef is at risk of coral bleaching again this summer.

Mr Albanese said the foundation, which received $443 million in seed capital in 2018 and set a target to raise $357 million in private funds, had failed to deliver value for taxpayers. Australia’s Auditor-General found in May the organisation had raised just $54 million – 99 per cent of which was for in-kind services, with just $684,000 in cash donations.

The Opposition Leader also accused the government of being “hostage” to climate sceptics in the Coalition. :(

Back-to-back La Nina weather events have produced two wet years in Australia, including the wettest November on record in 2021.
Global warming
Global warming heats up Australia’s cool La Nina weather cycle
“If you’re allowing [Nationals leader] Barnaby Joyce and the Nationals party to control your climate policy, then you’re not fair dinkum about protecting the reef. It’s as simple as that,” he said. :(

A spokesman for Environment Minister Sussan Ley said the government had committed $1.9 billion for the reef to date.

“The Morrison government will continue to invest heavily in the reef and in its community,” the spokesman said.

The Great Barrier Reef is a relatively uncontroversial environmental issue for both major parties to campaign on heading into the federal election, due by the end of May, with the tourism drawcard supporting 64,000 jobs and contributing $6.4 billion to the economy.

Central Queensland, where coal and gas are major industries, is a key battleground for votes and speculation is rife in the sector that the government will soon make the reef a subject of an election commitment with a hefty price tag.

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Coral bleaching on the Great Barrier Reef.
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Scientists say both major parties’ climate commitments fail to act consistently with the global action required to reduce carbon emissions enough to save the reef. The government and Labor have committed to reach net zero by 2050 and to curb emissions 28 per cent and 43 per cent by 2030, respectively.

Climate change is heating ocean and atmospheric temperatures, raising the risk of mass bleaching events. The Great Barrier Reef suffered severe back-to-back bleaching that wiped out swathes of corals in 2016, 2017 and 2020.

While there have been consecutive La Nina weather events, which typically bring cooler conditions, in the past two years, Australia has warmed by 1.4 degrees, faster than the global average, and scientists warn the reef is now at risk of bleaching every summer.

Global coral cover is forecast to decline 95 per cent under 2 degrees of warming, and 70 per cent under 1.5 degrees.

Scientists warn that coral reefs worldwide are likely to be wiped out if temperatures breach 2 degrees Celsius above the pre-industrial level.
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Why coral bleaching is like a bushfire
The Great Barrier Reef Marine Park Authority is expecting another bleaching event this summer, with corals already under heat stress due to elevated sea surface temperatures since December.

However, the authority said on Friday it remained to be seen if bleaching would be small or large scale, with its severity dependent on cloud cover, rain or cyclones.

“In the past, La Nina conditions would have meant very little chance of mass bleaching on the reef, but as average sea surface temperatures are rising, this is no longer the case,” a spokesperson said.

“Climate change is the greatest threat to the Great Barrier Reef. Only the strongest and fastest possible actions to decrease global greenhouse gas emissions will reduce the risks and limit the impacts of climate change.”

Meanwhile, the government faces a test over the reef from the United Nations Educational, Scientific and Cultural Organisation (UNESCO), which is considering another move to rescind its World Heritage status.

UNESCO issued a draft decision in June to list the reef’s World Heritage status as “in danger”, citing concerns over Australia’s climate change policy and management of water quality. While a majority of countries on UNESCO’s committee voted against downgrading the reef’s status, Australia is required to provide an update to justify its World Heritage ranking by next month.

whiteknight wrote on Jan 8^th, 2022 at 5:58am:

The government agency that oversees the Great Barrier Reef has warned it is at risk of another summer of coral bleaching as the major parties prepare for an election campaign clash over management of the natural wonder.

Oh dear. Coral bleaching has occurred for over 300 years. It is when the corals expel their symbiont zooxanthellae. The corals DON"T die. The zooxanthellae come back, maybe the same genus maybe not. But it is a natural event.

It is to do with the rate of change not the change itself. A rapid change - coral bleaching; a slow change no coral bleaching.

"Here, we use linear extensions from 44 overlapping GBR coral cores to extend the observational bleaching record by reconstructing temperature-induced bleaching patterns over 381 years spanning 1620–2001."

https://www.frontiersin.org/articles/10.3389/fmars.2018.00283/full

whiteknight wrote on Jan 8^th, 2022 at 5:58am:

Global coral cover is forecast to decline 95 per cent under 2 degrees of warming, and 70 per cent under 1.5 degrees.

And yet corals have survived periods when it was warmer and periods when it was cooler. It has survived over a very long time span. ::)

Quote:

Coral bleaching has occurred for over 300 years.

Thanks Lee. That's reassuring.

freediver wrote on Jan 8^th, 2022 at 12:19pm:

Thanks Lee. That's reassuring.

That's the data. Do you have a longer time period in mind? ;)

From the OP ...

... the government had committed $1.9 billion for the reef to date.

Another paper - Extract

"“Yonge already in 1931 found that living corals on the Great Barrier Reef were bleached after being exposed to high temperature (Oliver et al. 2009; Yonge and Nicholls 1931), and Kamenos and Hennige (2018) recorded the traces of coral bleaching in coral rock cores from the Great Barrier Reef back to 1575. So, coral bleaching is a phenomenon that always has existed as a normal way of adaptation to changing water temperatures, and is not a modern phenomenon.”

https://km.dmcr.go.th/ckeditor/upload/files/Research%20Bulletin/FullpaperPMBC/06Coral_bleaching_recorded_durin.pdf

It is so old it is new again. ;)

If it's too hot for the coral won't it just move further South
over many years?

We might end up with it growing near Sydney.

That would be Lord Howe Island at 31.53ºS.

The good thing about the GBR bleaching and dying off for any positive Tourism, is that the Mining Companies will have free avenue to exploit the area.

Sorta like saying Abos never really existed here in the first place.

lee wrote on Jan 8^th, 2022 at 1:14pm:

freediver wrote on Jan 8^th, 2022 at 12:19pm:

Thanks Lee. That's reassuring.

That's the data. Do you have a longer time period in mind? ;)

Longer than the time it can take a coral to grow would be a good start.

Quote:

The corals DON"T die.

You are so full of crap Lee. Corals can and do die completely as a result of bleaching. The reef can be reduced to algae coated rubble.

freediver wrote on Jan 8^th, 2022 at 8:14pm:

Longer than the time it can take a coral to grow would be a good start.

Poor petal. Corals grow from the spawn. Didn't you know that. So tiny little beings building ever so slowly. So perhaps what you mean is measurable growth. ;)

But look at the data from AIMS -

Also take into account the Crown of Thorn (Starfish (COTS) which is a natural predator. And Cyclones they are detrimental too. ;)

freediver wrote on Jan 8^th, 2022 at 8:14pm:

You are so full of crap Lee. Corals can and do die completely as a result of bleaching.

So tell us petal when and where they did the necropsies. perhaps you mean those "dead" corals that channeled Lazarus. ;D ;D ;D ;D ;D

But they do die of old age. ;)

Edit: BTW Flying over the coral, as was done, does not show corals as either dead or alive. The colour varies with the depth of the water.

You are full of crap Lee. You can get in the water and see the dead coral reefs for yourself, covered in algae.

freediver wrote on Jan 8^th, 2022 at 10:30pm:

You are full of crap Lee. You can get in the water and see the dead coral reefs for yourself, covered in algae.

The different coloured algae (zooxanthellae) are the "colour" of the reef. No algae - white - bleached.

https://oceantoday.noaa.gov/fullmoon-coralandalgae/welcome.html

" The algae also give a coral its color; coral polyps are actually transparent, so the color of the algae inside the polyps show through."

https://www.epa.gov/coral-reefs/basic-information-about-coral-reefs

How deep? The colour "washes out" with depth.

Never admit your lack of knowledge do you?

You are full of crap Lee.

So how far under water was your picture taken? Was it colour corrected to take out the "blue" of the ocean?

" This is because wavelengths in the blue part of the visible light spectrum penetrate water to some few metres, while all the wavelengths in the red part of the spectrum are absorbed by 5 metres under the water. "

https://jennifermarohasy.com/2021/09/bleached-from-a-distance/

You are full of crap Lee. You can see the water's surface in the photo. You can see algae growing over the dead coral. It could be 1km down. It would still be dead coral covered in algae.

You are full of crap Lee.

freediver wrote on Jan 9^th, 2022 at 12:07pm:

You can see the water's surface in the photo.

And yet you still can't tell us the depth of the photo. ;D ;D ;D ;D ;D

I can tell you that you are full of crap.

freediver wrote on Jan 9^th, 2022 at 12:13pm:

I can tell you that you are full of crap.

I will ask you a different question. Was the photo taken of a bleached coral? ;D ;D ;D

Duh.

You are full of crap Lee.

So you have a [photo. You don't at what depth the photo was taken, so we don't know it it is dead or not colour corrected. We also don't know whether this photo is supposed to be "death due to climate", if it is in fact dead.

You are such a numpty. ;D ;D ;D ;D ;D ;D

Looks more contaminated by silt run-off from Farms than bleaching.

lee wrote on Jan 9^th, 2022 at 2:48pm:

I know it is dead. Everyone knows it is dead. Because we have eyes. Everyone except you.

You are full of crap lee.

freediver wrote on Jan 9^th, 2022 at 9:47pm:

I know it is dead. Everyone knows it is dead. Because we have eyes.

Let's recap You don't know at what depth the photo was taken, you don't know if they have used colour correction and you don't know, if dead, whether it is due to AGW/CC.

But you can tell just by looking at that photo. freediver the photo whisperer. ;D ;D ;D ;D ;D ;D

There are Coral Reefs 500m down that are dead - thanks to Trawling.

lee wrote on Jan 10^th, 2022 at 2:58pm:

freediver wrote on Jan 9^th, 2022 at 9:47pm:

I know it is dead. Everyone knows it is dead. Because we have eyes.

Can you tell if this person is alive or dead Lee?

freediver wrote on Jan 10^th, 2022 at 7:00pm:

Can you tell if this person is alive or dead Lee?

Yes because humans have an internal bone structure. ;)

Can you tell whether coral is alive or dead without a necropsy? ;)

Did I mention you are full of crap?

Did you forget corals have an exoskeleton? ;D ;D ;D ;D ;D ;D

Some Coral are edible.
Some Coral are edible only once.

You are full of crap Lee.

https://www.aims.gov.au/docs/research/climate-change/coral-bleaching/coral-bleaching.html#:~:text=Bleached%20corals%20can%20no%20longer,for%20one%20or%20two%20years.

Bleached corals can no longer gain energy from photosynthesis, and if bleaching persists for an extended period, corals will starve and die.

https://en.wikipedia.org/wiki/Coral_bleaching

Some corals recover[1] if conditions return to normal,[3] and some corals can feed themselves.[3] However, the majority of coral without zooxanthellae starve.

In 2016, bleaching of coral on the Great Barrier Reef killed between 29 and 50 percent of the reef's coral.[9][10][11] In 2017, the bleaching extended into the central region of the reef.

If the coral polyps die of starvation after bleaching, they will decay. The hard coral species will then leave behind their calcium carbonate skeletons, which will be taken over by algae, effectively blocking coral re-growth.

Captain Nemo wrote on Jan 8^th, 2022 at 1:24pm:

From the OP ...

... the government had committed $1.9 billion for the reef to date.

is that how much money they gave that mate, without a tender process, that had no office and employed no people?

freediver wrote on Jan 11^th, 2022 at 7:21pm:

Bleached corals can no longer gain energy from photosynthesis, and if bleaching persists for an extended period, corals will starve and die.

So how long is this extended period? Has it been physically shown or perhaps it is modelled behaviour? Did they do a necropsy of the "dead" coral? Why did the "dead" coral reported by Terry Hughes do a Lazarus.

" AIMS is developing new and more sophisticated models for predicting bleaching threats and corals’ potential to recover and adapt to new climatic conditions. These models are based on our study of the relationships between environmental conditions, coral health and past bleaching events."

And they don't even admit that bleaching is KNOWN to have occurred for over 300 years and STILL survived. ;D ;D ;D ;D

freediver wrote on Jan 11^th, 2022 at 7:21pm:

In 2016, bleaching of coral on the Great Barrier Reef killed between 29 and 50 percent of the reef's coral.[9][10][11] In 2017, the bleaching extended into the central region of the reef.

Once a reef is dead it can no longer harbour the zooxanthellae.

And it recovered. The Lazarus effect. ;D ;D ;D ;D ;D ;D

So AIMS has only been studying the reef since 1983. Oh dear. ;)

This is what you said Lee:

lee wrote on Jan 8^th, 2022 at 12:15pm:

Oh dear. Coral bleaching has occurred for over 300 years. It is when the corals expel their symbiont zooxanthellae. The corals DON"T die.

You are full of crap.

Quote:

The hard coral species will then leave behind their calcium carbonate skeletons, which will be taken over by algae, effectively blocking coral re-growth.

Can you see it yet Lee?

freediver wrote on Jan 11^th, 2022 at 8:13pm:

This is what you said Lee:

lee wrote on Jan 8th, 2022 at 10:15am:
Oh dear. Coral bleaching has occurred for over 300 years. It is when the corals expel their symbiont zooxanthellae. The corals DON"T die.

You are full of crap.

Oh dear. You still haven't shown coral died. ;D ;D ;D ;D

freediver wrote on Jan 11^th, 2022 at 8:15pm:

Quote:
The hard coral species will then leave behind their calcium carbonate skeletons, which will be taken over by algae, effectively blocking coral re-growth.

Oh- Will leave; Not have left? ;D ;D ;D ;D

Can you post where they have shown the coral DIED? It is not in the photo, it is not in anything AIMS have posted.

Once a coral has died it will not be re-inhabited. Corals cannot do a Lazarus. ::)

Quote:

Can you post where they have shown the coral DIED? It is not in the photo

If you had one eye and half a brain, you could figure it out Lee.

8-)
With my trusty Zaphod Beeblebrox sunglasses on...

freediver wrote on Jan 11^th, 2022 at 10:14pm:

If you had one eye and half a brain, you could figure it out Lee.

From a photo of undisclosed origin? ;D ;D ;D ;D ;D

You are like a crayfish - Meat in the tail and sch!t for brains. ;D ;D ;D ;D ;D

Yes Lee. Without knowing the location. Or the water depth. Or the age and gender of the photographer. Just like you did with this one:

Unless of course, you are full of crap.

freediver wrote on Jan 12^th, 2022 at 12:43pm:

Without knowing the location. Or the water depth. Or the age and gender of the photographer. Just like you did with this one:

This was underwater? Good photo. But looking at the edges of the grave it doesn't appear so.

Age and gender of photographer? Oh dear gender analysis is your short suit? ;D ;D ;D ;D

So you don't understand exoskeleton (like coral) at all then. I was giving you the benefit of the doubt. ;D ;D ;D ;D ;D ;D

Come on kids - try to keep it civilised please.

Australian Politics Forum
http://www.ozpolitic.com/forum/YaBB.pl Member Run Boards >> Environment >> Great Barrier Reef Election Battle Brews http://www.ozpolitic.com/forum/YaBB.pl?num=1641585500 Message started by whiteknight on Jan 8^th, 2022 at 5:58am