Category Archives: Coral

Great Barrier Reef: how a spectacular coral spawning event is helping to breed heat-tolerant corals

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Scientists have carefully collected spawn bundles by moonlight in a bid to help save the reef

It’s nearing 10pm, and Dr Kate Quigley is still waiting. Using red lights to minimise disruption to the animals’ behaviour, she is inspecting corals.

Quigley, who studies reef restoration at the Australian Institute of Marine Science, is looking for “little red dots all over the surface”. A pimply appearance is a hallmark sign that a coral is about to spawn, releasing sperm and eggs in bundles resembling small bubbles.

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Global coral cover has fallen by half since 1950s, analysis finds

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Overfishing, a heating planet, pollution and habitat destruction have devastated reefs, scientists warn

The world’s coral reef cover has halved since the 1950s, ravaged by global heating, overfishing, pollution and habitat destruction, according to an analysis of thousands of reef surveys.

From the 1,430-mile (2,300km) Great Barrier Reef in Australia to the Saya de Malha Bank in the Indian Ocean, coral reefs and the diversity of fish species they support are in steep decline, a trend that is projected to continue as the planet continues to heat in the 21st century.

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Deadly coral disease sweeping Caribbean linked to wastewater from ships

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Researchers find ‘significant relationship’ between stony coral tissue loss disease and nearby shipping

A virulent and fast-moving coral disease that has swept through the Caribbean could be linked to waste or ballast water from ships, according to research.

The deadly infection, known as stony coral tissue loss disease (SCTLD), was first identified in Florida in 2014, and has since moved through the region, causing great concern among scientists.

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Chinese Unesco official defends plan to list Great Barrier Reef as ‘in danger’

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Tian Xuejun rejects Australia’s ‘groundless accusations’ that China influenced the finding to score political points

The Chinese host of a United Nations world heritage committee has defended a proposal to label the Great Barrier Reef as “in danger”, and rejected Australian government suspicion that China influenced the finding for political reasons.

It came as the Morrison government sought to use a new report by Australia’s marine science agency to argue there had been widespread coral recovery on the reef.

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Great Barrier Reef: leading scientists praise Unesco’s ‘in danger’ warning

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Group of reef and climate scientists say world heritage warning merited and Australia has not ‘pulled its weight on emissions’

Five of the world’s leading reef and climate scientists have thanked Unesco for recommending the Great Barrier Reef be listed as world heritage “in danger”, saying it was the right decision in part because Australia had not “pulled its weight” in reducing emissions.

The group of scientists, including the Australian professors Ove Hoegh-Guldberg and Terry Hughes, wrote to the UN body on Thursday saying the recommendation to downgrade the 2,300-km reef system’s world heritage status was “the right decision”.

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ICYMI: Australian news you may have missed during the coronavirus crisis

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From the final verdict on George Pell to devastating Great Barrier Reef bleaching, here’s our roundup of important stories

As Australia’s coronavirus outbreak continues, a lot of important news has slipped under the radar.

Here are the most important stories you may have missed over the past week. From the statement of George Pell’s accuser to the worst coral bleaching the Great Barrier Reef has ever seen.

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Climate crisis may have pushed world’s tropical coral reefs to tipping point of ‘near-annual’ bleaching

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Exclusive: Mass bleaching seen along Great Barrier Reef could mark start of global-scale event, expert warns

Rising ocean temperatures could have pushed the world’s tropical coral reefs over a tipping point where they are hit by bleaching on a “near-annual” basis, according to the head of a US government agency program that monitors the globe’s coral reefs.

Dr Mark Eakin, coordinator of Coral Reef Watch at the National Oceanic and Atmospheric Administration, told Guardian Australia there was a risk that mass bleaching seen along the length of the Great Barrier Reef in 2020 could mark the start of another global-scale bleaching event.

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Great Barrier Reef’s latest bleaching confirmed by marine park authority

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Severity of damage has increased, with areas spared in previous years experiencing moderate or severe bleaching

The government agency responsible for the Great Barrier Reef has confirmed the natural landmark has suffered a third mass coral bleaching episode in five years, describing the damage as “very widespread”.

The Great Barrier Reef Marine Park Authority said the assessment was based on information from in-water and aerial observations, and built on the best available science and technology to understand current conditions.

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Great Barrier Reef suffers third mass coral bleaching event in five years

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Renowned scientist Terry Hughes says huge swathes of reef have been affected in a ‘severe’ situation

The Great Barrier Reef has experienced a third mass coral bleaching event in five years, according to the scientist carrying out aerial surveys over hundreds of individual reefs.

With three days of a nine-day survey to go, Prof Terry Hughes told Guardian Australia: “We know this is a mass bleaching event and it’s a severe one.”

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Great Barrier Reef watchers anxiously await evidence of coral bleaching from aerial surveys

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Planes will this week cover areas in the southern half of the reef that escaped earlier bleaching but may have undergone high levels of heat stress

The full impact of coral bleaching across the Great Barrier Reef will become clearer this week as aerial surveys of hundreds of reefs are completed in the bottom two thirds of the world’s biggest reef system.

An aerial survey carried out last week over almost 500 individual reefs between the Torres Strait and Cairns revealed some severe bleaching of corals closer to shore, but almost none on outer reefs.

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Healthy coral sounds lure fish back to abandoned reefs, study finds

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With global heating damaging corals worldwide, experts find potential tool in ‘acoustic enrichment’ to recolonise reefs

Playing sounds of a healthy coral reef can attract fish back to reefs that have become degraded and abandoned, researchers have found.

Global heating together with factors such as pollution are causing widespread damage to coral and harming delicate reef ecosystems.

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Massive pumice ‘raft’ spotted in the Pacific could help replenish Great Barrier Reef

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The 150 sq km field of floating rock was created by an underwater volcanic eruption near Tonga

A giant raft of pumice, which was spotted in the Pacific and is expected to make its way towards Australia, could help the recovery of the Great Barrier Reef from its bleaching episode by restocking millions of tiny marine organisms, including coral.

The pumice raft, which is about 150 sq km, was produced by an underwater volcano near Tonga. It was first reported by Australian couple Michael Hoult and Larissa Brill, who were sailing a catamaran to Fiji, on 16 August.

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Reef wipeout: surfers fight China-linked mega resort in Fiji

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Jona Ratu and his friends wanted to build an eco-lodge in their corner of paradise – then the diggers arrived

It was one of the most surreal days of Jona Ratu’s life. On a May morning in 2018 he strolled down to the palm-fringed beach on a parcel of land he owns on idyllic Malolo island to find a digger parked on the coral reef.

“They just dug, they kept digging, digging, digging,” Ratu remembers.

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Japan’s war on whales isn’t over – the Australian government must keep fighting | Darren Kindleysides

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Australia’s global leadership on whale conservation will be tested as Japanese hunters move to a different hemisphere

Japan’s whaling fleet arrived back at the port of Shimonoseki on the weekend with a barbaric tally of 333 dead whales that are no longer swimming freely in the Southern Ocean.

If the work of the Japanese whalers is anything like last year, more than 100 pregnant females and 50 or so juveniles will have been killed. But from now on, things are different.

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