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#1 2018-04-19 00:56:43

Registered: 2017-12-20
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SYDNEY, May 11 (Xinhua) -- The smell of dead corals from the mass coral bleaching event occurring on Australia's Great Barrier Reef is masking the predators to the tropical damsel fish that call the reef home, Aussie researchers warned on Wednesday.

Researchers from James Cook University (JCU) in northern Queensland state and Sweden's University of Uppsala have been investigating the mechanism behind community structure changes on the Great Barrier Reef that have coincided with the current mass bleaching event.

Coral bleaching occurs when stress such as heat caused the animal to expel the symbiotic algae, loosing vital nutrients and energy reserves, thus color, leading to the wide scale loss of productive habitats for fish.

The coral host then becomes weak and susceptible to disease. When bleaching is prolonged, the animal can die.

"When we were doing the experiments we were bringing in some of this dead coral, and we started to get complaints from our friends in the laboratory because the stuff was so smelly," JCU Professor of Marine Ecology Mark McCormic told Australia's national broadcaster.

Damsels are covered in sensory cells on the front of their bodies, essentially tastebuds, which are important to learn about, and sense nearby predators, however the smelly, decomposing coral is playing havoc with these sensory systems, finding they did not respond to predator chemical cues.

"The smell that comes off degrading coral reef is actually masking some of the important chemicals that the animal is using to inform its decisions," McCormic said.

McCormic's research is pointing to significant changes to the reef's ecosystem, not only from the loss of coral life, but over predation of species which will potentially cause significant impacts to the community structure.

"The (bleaching) disturbance is on a scale that they probably haven't felt before," McCormic told Xinhua.

"Some species actually like living on dead coral and coral rubble, but there's not as many as you would have if you have a diverse reef."

"What we don't know now (however) is how widespread this is."

Coral reefs are one of the most important and productive marine ecosystems that the world depends on for tourism and fisheries sustainability, however, human induced climate change has been increasing the frequency of mass coral bleaching events.

The mass bleaching event occurring on Australia's Great Barrier Reef is the worst on record, with all but 7 percent remaining unaffected. Alarmingly, 90 percent of the norther reaches of the reef is likely to die, and thus, significantly affecting the community structure of the reef.

Scientists are now investigating if the coral degradation affects other fish species in the same way, and whether ones that are affected can cope from the loss of chemical cues and habitat in some other way.

(From left to right) Wang Qun puma suede heart satin noir , China's chief negotiator and Director-General of the Department of Arms Control of Chinese Ministry of Foreign Affairs, French Foreign Minister, Laurent Fabius, German Minister of Foreign Affairs, Frank-Walter Steinmeier puma suede heart satin pas cher , EU High Representative for Foreign Affairs and Security Policy, Federica Mogherini, Iranian Foreign Minister, Mohammad Javad Zarif, unidentified Russian delegate puma heart patent blanche pas cher , British Foreign Secretary, Philip Hammond, and US Secretary of State, John Kerry, pose for a group photo during a press event after the end of a new round of Nuclear Iran Talks in Lausanne puma heart patent blanche , Switzerland, April 2, 2015. [PhotoXinhua]

LAUSANNE, Switzerland - A joint statement was being finalized on Thursday at talks between Iran and world powers over Tehran's nuclear program, but officials stopped short of suggesting that a deal had been reached.

A US official and a Western diplomat said the joint statement was being drafted to be issued by Iran's Foreign Minister Javad Zarif and EU foreign police chief Federica Mogherini.

An Iranian official also confirmed Zarif and Mogherini would issue a joint statement puma heart patent noir pas cher , suggesting it might fall short of an announcement of a deal.

"This is only a statement," the Iranian official said.

Mogherini has acted as a coordinator for the six powers - Britain, China, France, Germany puma heart patent noir , Russia and the United States - negotiating with Tehran to prevent it from acquiring the means to develop a nuclear bomb.

The diplomat said a full session between representatives of six powers and Iran was about to start at the talks in Lausanne, Switzerland.

Neither official would confirm that a deal had been reached at the marathon talks, which aim to reach a preliminary political agreement before a final deal is reached by June 30.

The Swiss talks were due to end by Tuesday but have been extended for two days, with sides saying they were making progress but having trouble agreeing on details.

UNITED NATIONS, Dec. 5 (Xinhua) -- "Silent night puma heart patent pas cher , holy night. All is calm, all is bright," the Christmas carol was sung on the north lawn at the UN headquarters in the chilly Friday afternoon.

It is for the "Christmas truce," a series of unofficial cease-fires that took place around Christmas 1914 during World War I, in which British and German soldiers stopped fighting for a day puma smash vulc pas cher , exchanged greetings and sang carols in trenches of the Western Front. Some of them were friendly enough to play football together.

The United Nations held a special event to commemorate the centenary of the truce, which UN Secretary-General Ban Ki-moon referred to as "quite extraordinary, unchoreographed."

"To this day, the events of Christmas 1914 give us hope that enmities can be forgotten, and that former enemies ... can become great allies puma ignite dual bolt pas cher ," Ban told the event.

"Tragically, the world found itself at war again (in WWII). The United Nations rose from those ashes, and next year will celebrate its 70th anniversar.



2018-04-19 00:56:43



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