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This bleaching occurs because corals can only live in a narrow temperature range, healthy corals get their color from microscopic algae living in their tissues, these manufacture food for the corals by photosynthesis, but when the temperature rises j...
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A cyclone can be over 500kms across with a wind swirling around the eye of 300kms per hour.It was the most destructive force that great barrier reef must face.And in Feb,2011,this part of reef was hamered by the biggest storm in the living memory,cyc...