New threat to co­ral seen

Los Angeles Times - - 9• 22•10 - — as­so­ci­ated press

Caribbean corals are be­ing ex­posed to wa­ter tem­per­a­tures higher than those re­ported dur­ing a record bleach­ing pe­riod in 2005 and could start dy­ing in the com­ing weeks, sci­en­tists said.

When corals are ex­posed to very warm wa­ter, they ei­ther ex­pel or con­sume the col­or­ful al­gae they host, which leads to the bleached color.

If the stress is pro­longed and the al­gae pop­u­la­tions do not re­cover, the co­ral host even­tu­ally dies.

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