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SYDNEY Omri Casspi Jersey , March 2 (Xinhua) -- Aussie scientists are at odds of theimpact of the localised coral bleaching found on the Great BarrierReef as the authorities ramp up monitoring in the highest riskperiod.


Human induced climate change has been increasing the frequencyof mass coral bleaching events as areas of the Pacific such asFiji, Kiribati and New Caledonia begin suffering a mass bleachingevent from El Nino re-enforced warm water travelling through theequatorial pacific.


Patchy coral bleaching has been detected in multiple, mainlyshallow areas of the Great Barrier Reef (GBR) where corals arefrequently exposed to sunlight. However with sea surfacetemperatures fluctuating 2.5 degrees Celsius above average acrossthe marine park, March is representing its highest risk period.


"We're down to the wire now -- the 'mild and widespread'bleaching we're seeing now is the result of very warm conditionsover the past few weeks," Director of the ARC Center for Excellencefor Coral Reef Studies at James Cook University Damian Jones Jersey , Professor TerryHughes said in a statement on Wednesday.


Australian scientists, including Hughes have said these majorbleaching events "didn't exist 30 years ago" and are entirely aconsequence of the global failure to tackle greenhouse gasemissions, highlighting the importance of limiting average globaltemperature rises to below two degrees Celsius.


However James Cook University marine geophysicist ProfessorPeter Ridd believes rather than "another scare story" on the coralbleaching that is ultimately human induced, the reef will fairbetter and potentially grow from the rise in temperature.


Ridd argues the annual and spatial variability of watertemperature is far greater than the small average temperature riseover the last century, thus temperature rises would have broken thebleaching threshold "long before marine biologists first noticedbleaching".


"All the corals that live on the GBR live in water aroundIndonesia where the temperature is much higher than in the GBR butgrow much faster and better than our reefs Andre Iguodala Jersey ," Ridd said.


"We should be predicting that the GBR will grow better from amodest temperature rise.


"This is yet another scare story and in the end it will reflectbadly on science."


Coral reefs are one of the most important and productive marineecosystems that the world depends on for tourism and fisherysustainability.


Coral bleaching occurs when stress such as heat caused theanimal to expel the symbiotic algae, loosing vital nutrients andenergy reserves, thus color, leading to the wide scale loss ofproductive habitats for fish.


The coral host then becomes weak and susceptible to disease, andwhen bleaching is prolonged David West Jersey , the animal can die.


Recent research suggests corals with high levels of fat or otherenergy reserves can withstand annual bleaching events, which iscritical to predicting the persistence of corals and their capacityto recover from more frequent events resulting from climatechange.


Severe bleaching events however may take highly impacted coralreefs up to 10 years to recover.


Scientists are hoping for bad weather, such as clouds, rain andstorms to mix the water and keep temperatures at bay on the GBR,otherwise the still conditions -- ideal for tourists -- over thenext few weeks will ramp up the heat. Enditem


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