Mass Coral Bleaching Occurring in Great Barrier Reef for Second Year (Download PDF)


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Great Barrier Reef has been devastated by coral bleaching for the second consecutive year in a row. This marks the first time the reef has not had several years between bleaching events to recover According to researchers.


  • Great Barrier Reef Marine Park Authority and researchers from the Australian Institute of Marine Science conducted this survey.
  • They spent 6 hours an expansive aerial survey from Townsville to Cairns, Australia.
  • Found that bleaching is affecting the central part of the park.
  • It just last year had escaped severe bleaching.
  • This event will depend very much on local weather conditions over the next few weeks.
  • Warmer oceanic waters urged by climate change have led to an increase in coral bleaching around the world.
  • Many coral species seem to be at greater threat of bleaching after more than a year of above-average ocean temperatures.
  • Bleaching is extremely alarming, Wachenfeld reiterated that not all bleached coral will die.
Healthy, Bleached and Dead coral

Healthy, Bleached and Dead Coral

Healthy, Bleached and Dead coral

Great Barrier Reef:

  • It along the coast of Australia experienced bleaching events in 1980, 1982, 1992, 1994, 1998, 2002, 2006 and 2016.

Mass bleaching events:

  • Most evidence indicates that elevated temperature is the cause of this event.
  • 60 major episodes of coral bleaching have occurred between 1979 and 1990,
  • It associated with coral mortality affecting reefs in every part of the world.
  • In 2016, the longest coral bleaching event was recorded.
  • In 2016, bleaching:

    • Hit 90 % of coral on the Great Barrier Reef
    • Killed more than 20 percent of the reef’s coral

Coral bleaching:

  • It is a loss of endosymbiotic algae from the coral, or through expulsion or loss of algal pigmentation.
  • Above-average sea water temperatures caused by global warming.
  • It has been identified as a leading cause for coral bleaching worldwide.
  • History of Coral Bleaching Events:
History of Coral Bleaching Events

History of Coral Bleaching Events

History of Coral Bleaching Events

  • Biotic and Abiotic factors affecting of coral bleaching:
Biotic and Abiotic factors affecting of coral bleaching

Biotic and Abiotic Factors Affecting of Coral Bleaching

Biotic and Abiotic factors affecting of coral bleaching

- Published/Last Modified on: March 20, 2017


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