Friday, 19 April, 2019

Scientists say new corals on Great Barrier Reef down by 89 percent

Bleached coral in March 2017 Enlarge Bleached coral in March 2017.G Torda ARCCOE Flickr
Cary Marshall | 06 April, 2019, 10:26

The scientists are set to return to Lord Howe in the next few months to find out if some corals have been so severely bleached they can not recover.

PhD candidate at the University of Newcastle Tess Moriarty spent most of March surveying the corals in the lagoon as part of a project which began last November. "Our study investigated how the production of baby corals has been affected by the loss of adult brood stocks".

"At the most highly impacted site there is about 5 per cent that are dead at the moment".

The corals in the deeper regions of the marine park were relatively healthier and didn't exhibit any bleaching. The large overall size and high number of distinct reefs provides a buffer against most major disturbances.

Professor Pratchett added that the southern reefs that escaped the bleaching are still in very good condition, but they are too far away to replenish reefs further north.

"What we learn from this is what species are going to be okay for the future and what are succeeding, what are the winners and losers in that regard".

Leggat said increasing baseline temperatures caused by climate change, and local factors such as elevated temperatures in the area this summer, caused the bleaching to occur.

"I'm reasonably positive that we'll still have reefs [in the future]", says Hughes.

"Maybe shading the corals or something like that".

Ms Steinberg said global carbon emissions need to be reduced to combat the impact of climate change.

More news: Billy Ray Cyrus Releasing Remix Of Lil Nas X’s "Old Town Road"

Drought had contributed to the problem too, Ms Moriarty said. Cobb said. "How much can they come back?"

Corals can recover if the water temperature drops and the algae are able to recolonise them.

Associate professor at the University of NSW School of Biological, Earth and Environmental Sciences, Dr Tracy Ainsworth, said it wasn't the first time there had been signs of bleaching.

The Great Barrier Reef, the world's largest, comprises hundreds of different coral species.

"This looks to be quite severe."
Scientists working on the study found the loss in adult corals caused a "crash in coral replenishment" on the reef, as heat stresses brought about by warming ocean temperatures impacted the ability of coral to heal.

Rates of coral recruitment recorded in the aftermath of the recent coral bleaching were just 11 percent of levels recorded during the preceding decades. But scientists are anxious that the gap between pairs of coral bleaching events will continue to shrink as global warming intensifies. After eight weeks they were collected and carefully inspected under a microscope to count the number of newly settled coral recruits. Hide Caption 10 of 14 Photos: Australia's Great Barrier Reef suffers "extreme" coral bleaching Tourism on the Great Barrier Reef generates an annual income of A$5 billion ($3.9 billion) and employs almost 70,000 people.

"There's little crabs and shrimp that live in amongst the coral - there's fish that rely on corals", Dr Ainsworth said. Without the algae, the coral dies and seaweeds take over.

"So as the corals start to suffer the other animals start to suffer as well and some of them can't just move on to another area".

Ms Moriarty said tour operators were explaining the event to a lot of their tourists.

"We've gotten to the point now where local solutions for the reef are nearly pointless - the only thing that matters is action on climate change", Prof Baird said. Widespread coral bleaching during back-to-back summers was particularly toxic, as it did not leave enough time for the corals to fully recover.

Recommended

Fossil of 4-Legged Whale Found in Peru Fossil of 4-Legged Whale Found in Peru Scientists have known since Darwin's time that whales , dolphins and porpoises are descended from four-legged hoofed mammals. The discovery adds new insights into the geographical spread of ancient whales at this stage in their evolutionary history.

MIT halts partnerships with Huawei Technologies and ZTE MIT halts partnerships with Huawei Technologies and ZTE As part of this new review process, MIT will not accept any new engagements with Huawei, ZTE, or subsidiaries of either company. Huawei and ZTE both dispute claims from the United States government they pose a threat to national security.

Mental health assessments ordered for accused shooter Mental health assessments ordered for accused shooter He has been charged with 50 counts of murder and 39 counts of attempted murder. While upset after the court appearance, Alam said he was no longer afraid.

Google Play will close Artist Hub by the end of the month Google Play will close Artist Hub by the end of the month This was the way independent artists managed their profiles on Google Play Music , including uploading their music to the service. Users of Artist Hub received an email warning them that from the end of this month all of their content will be removed.

Is Haftar an aggressor or leader in Libya? Is Haftar an aggressor or leader in Libya? An LNA-allied armed group withdrew overnight from so-called Gate 27, leaving it abandoned in the morning, a Reuters reporter said. The UN Security Council will meet on Friday to discuss the situation following a request from the United Kingdom , reports said.

Pair of Tigers under the weather at Final Four Pair of Tigers under the weather at Final Four Mooney said the diverse roster has helped with team chemistry. "There also were good fighters and we talk a lot about fighting". Freshman Josh Mballa hails from France, as do player development director Max Lefevre and graduate assistant Elliott De Wit.

Bruins vs. Blue Jackets - Game Recap - 3 April 2019 Bruins vs. Blue Jackets - Game Recap - 3 April 2019 But for the Blue Jackets to get out-checked - outworked, really - at such a momentous point on the schedule was not a good look. During the first period of the contest in Columbus, Boston managed to score on one of the flukiest goals that you may ever see.

Komodo island to close because people keep stealing dragons Komodo island to close because people keep stealing dragons They will still be able to see the dragons in other parts of Komodo National Park , including Rinca and Gili Motong islands. Barahamin reports that in 2014, Komodo National Park received 80,626 visitors, which jumped to 159,157 past year .

Nestle goes vegan with meat-free burger range Nestle goes vegan with meat-free burger range Impossible Foods published a detailed explanation of heme extraction and creation of genetically engineered food on their website. The Swiss food giant goes so far as to say their veggie burger "hardly differs from a traditional burger".

MacKenzie Bezos Will Become The World's Fourth Richest Woman MacKenzie Bezos Will Become The World's Fourth Richest Woman Mr Bezos had been the subject of tabloid rumours that he was dating the presenter following his divorce from wife MacKenzie Bezos. She is nearly tied in third place with Mars candy company heiress Jacqueline Badger Mars, who has a net worth of $37 billion.

UK's May asks European Union for Brexit delay, but France's Macron says ‘premature’ UK's May asks European Union  for Brexit delay, but France's Macron says ‘premature’ British Prime Minister Theresa May , pictured here with European Council President Donald Tusk , is seeking more time. Twenty-five lawmakers in Labour urged Corbyn to go the "extra step" if there was a chance of agreeing a Brexit deal.

CPSC, Fisher-Price warn parents of baby product’s death danger CPSC, Fisher-Price warn parents of baby product’s death danger The CPSC is recommending that all parents stop using the product by three months or as soon as an infant is able to roll over. In the warning, the Consumer Product Safety Commission and Fisher-Price said babies rolled over in the product and died.

Jordan Henderson On Bench - Liverpool Team vs Southampton Confirmed Jordan Henderson On Bench - Liverpool Team vs Southampton Confirmed Sure, he might slow down play and opt for caution more often than you'd like, but he brings control and certainty. If they win their first title in a generation, nobody will care much about the process, only the result.

Trump tells Fed chair Powell he is 'stuck' with him Trump tells Fed chair Powell he is 'stuck' with him Trump seems to be being pretty blunt with how he feels to his much-maligned Fed chair's face (or voice) as well. Powell had a "brief call" with Trump on March 8, a Fed representative said, declining to comment further.

Jussie Smollett's Lawyer: City Is Attempting To Intimidate Actor With Lawsuit Jussie Smollett's Lawyer: City Is Attempting To Intimidate Actor With Lawsuit According to TMZ , Geragos sent an angry letter to the City of Chicago over their plans to file a suit against Smollett. They say Smollett will not pay $130,000 for the cost of the investigation as it is "unconstitutional". " Mr.