Archives for May 2016

Bleaching on Australia’s Great Barrier Reef

A plane flies low over a turquoise sea off the coast of Queensland in northern Australia. Below lies the largest reef in the world: the Great Barrier Reef (GBR). At first, I think—or maybe it’s hope—that the white patches are boulders or cresting wavelets. But as the plane flies on, their true identity becomes undeniably clear: these are bleached corals. And there are a lot of them. As this video taken by researchers from the ARC Centre of Excellence for Coral Reef Studies makes clear, the GBR is in trouble. Reports indicate that up to 93 percent of corals in the northern part of the reef have bleached. But it’s not just the GBR that’s reporting bleaching: corals in the Indian Ocean, Caribbean, north and south Pacific, and coral triangle are all turning bone-white. What does it mean to say that a coral is bleached? Corals get their colors from tiny algae that live within their tissues. These algae help corals grow by capturing … [Read more...]