Rebels to the Coral Reef Cause (Part 5)

One of the participants in the IPA’s new Reef Rebels’ program said to me earlier this week, ‘But there is only one narrative, Jen’. It was during one of our wide-ranging dinner discussions about perspectives and politics and so on.  The narrative in the mainstream media is that the Great Barrier Reef is dying due to repeated coral bleaching from global warming. Yet at the same time there is a tourist industry, with dive shops advertising their local coral reef as pristine. So, there is one narrative and then there are claims by tourist operators.

The narrative can be tested by visiting the coral reefs that the tourist operators claim to be pristine. Especially the same ones the institutions claim to be bleached. Just yesterday, for example, we visited Stanley Reef with the Yongala Dive Shop at Alva Beach. Their Stanley Reef webpage explains:

Join us on an unforgettable day at Stanley Reef snorkelling and diving this truly healthy and pristine coral reef.

Your day starts with an adventurous 4WD across the sand before we launch from the beach. We are the only operator to access this section of reef, so there will be no crowds – guaranteeing you an unforgettable day.

Cruise over turquoise water and beautiful colourful coral reefs, spotting unique marine life and enjoy a once-in-a-lifetime experience on Australia’s Outer Great Barrier Reef.

Meanwhile the Great Barrier Reef Marine Park Authority has listed this reef as 90% bleached, and it has also been reported as in a sorry state by the Climate Council.

Participants in the IPA’s Reef Rebels program getting onboard at Alva Beach on 8th July 2022.

Stanley Reef is vast, and we only got to visit a small part of it yesterday. But we did specifically ask to be shown the worst bleaching at Stanley Reef including that section of Stanley reef visited by Selina Ward from University of Queensland with her claims of severe bleaching promoted nationally and internationally including by Tim Flannery’s Climate Council. Her story is consistent with the one official narrative.

At Stanley Reef yesterday, participants in the IPA’s Reef Rebels program got in the water and snorkelled over reef crests. They variously estimated bleaching at most to be between 10 and 20 percent. This is irreconcilable with the Great Barrier Reef Marine Park Authority’s claims of 90% from an aerial survey which would also have been of the reef crest.

Corals growing on the reef crest were mainly beige or mauve in colour.  Photograph taken under the water at Stanley Reef on 7th July 2022 by Jennifer Marohasy.
Most healthy corals at reefs around the world are beige in colour. Photograph taken under the water at Stanley Reef on 7th July 2022 by Jennifer Marohasy.
With macro photography it is possibly to see the corallites close-up and know that this is a species of Acropora. Photograph taken under the water at Stanley Reef on 7th July 2022 by Jennifer Marohasy.
A close-up photograph provides no idea of the habitat, only a wider angle shot can show that the mauve Acropora is growing on a ledge jutting out from the reef crest. Photograph taken under the water at Stanley Reef on 7th July 2022 by Jennifer Marohasy.
There was some bleaching. This coral colony included branches invested with algae after becoming bleached, some branches bleached white, and also some healthy beige-coloured branches.
Some of the rotting branches were being colonised by sponges.
Immediately above the colony with healthy, and also rotting branches was a healthy plate coral.
There were lots of fish, including this giant trevally that rushed at me from nowhere and then turned and disappeared into the blue.

I was on scuba with an air tank strapped to my back so I got to see a lot more. Over the edge and down the walls there were foliose corals in the genus Monitpora and Turbinaria.

There were so many different types of foliose corals over the edge at Stanley Reef.
Even with macrophotography it is difficult to see the corallites on this coral probably because they are ill-defined it being a species of Montipora.

In the deeper water, without large lights corals often have a blue haze. 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.

This foliose species is almost certainly in the genus Turbinaria and I could tell that from its corallites using macro photography.
A close-up showing the corallites.
A close-up showing the foliose nature of the coral colony.

All the photographs in this blog post were taken with my little Olympus TG6 camera and a small light set-up suitable for macro-photography but not for wide angle.

The photographs were taken to give some idea of the state of Stanley Reef for this moment in time. At the Great Barrier Reef Marine Park Authority website there is only a map showing Stanley Reef as severely bleached – the clear impression is that more than 90% of the corals at Stanley Reef are on the verge of death. The official GBRMPA map is based on a 2021-22 aerial survey. This involves flying over coral reefs at an altitude of 150 metres. I would argue at this distance you can’t actually make out individual coral colonies so how could you possibly know the health of the corals.

According to the Great Barrier Reef Marine Park Authority more than 90% of the corals at Stanley Reef are bleached. This is a nonsense claim based on an aerial survey with the coral scored from a distance of more than 150 metres.

There may only be one narrative. And disappointingly it bears no relationship to the reality under the water. Stanley Reef is still a coral wonderland and thanks to the IPA’s Reef Rebels program I got to see it all with my own eyes. That is real science, being able to bear witness to the state of an environment up close and in real time.

My experience of Stanley Reef was consistent with the information at the Yongala Dive website.

Montipora and Acropora at about 8 metres depth, photographed by Jennifer Marohasy on 8th July 2022 at Stanley Reef.
A wide-angle photograph of the stands of Montipora and Acropora at a depth of about 8 metres.

***
The top feature image shows two of the participants in the IPA’s Reef Rebel program.  All the photographs in this blog post were taken at Stanley Reef on 7th July 2022 or on the way to Stanley Reef by Jennifer Marohasy.

via Jennifer Marohasy

https://ift.tt/ZuFNqRG

July 7, 2022 at 09:44PM

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s