Bleaching affects more than just corals. (via hakaimagazine)
Bleaching occurs when a stressed marine creature, most commonly a coral, expels its symbiotic algae and turns a ghostly white, often in response to a warming sea. But bleaching affects more than just corals. Giant clams—massive mollusks that can grow more than 1.2 meters in diameter and weigh as much as 225 kilograms—can bleach, too.
Scientists have been studying bleaching in giant clams for decades. In 1997 and 1998, during a brief period that saw extensive coral bleaching worldwide with corals succumbing in, bleached giant clams were observed from Australia’s Great Barrier Reef to French Polynesia after water temperatures in the South Pacific rose significantly. In 2010, similar temperatures in the water off Thailand’s Ko Man Nai Island also led to scores of deaths.
Mei Lin Neo, a marine ecologist and giant clam expert at the National University of Singapore who was not involved in the study, says the work contributes to the story of how climate change can have “repercussions on the longevity of species.”
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