No, the islands are not shrinking

"Nothing we see today on Indian or Pacific Islands is unprecedented. All the panic about islands disappearing is nothing compared to what nature does all the time. Indeed, man-made climate change, if it has done anything at all — has been a boon for islands in the last fifty years.
    "The new paper by Kench et al looked at 1,100 islands across the Pacific and Indian oceans, and even though CO2 levels rose from 325ppm to an apocalyptic 420ppm, the average island got bigger instead of smaller, and only 3 small uninhabited islands completely disappeared....
   "Despite the threat of man-made climate change, [the researchers found that] nearly every island larger than a tenth of a square kilometre is the same size as it was or expanding. This is an update on a previous survey of 700 islands which showed they were mostly growing."

~ Jo Nova from her post 'Surprise! 1,000 Pacific and Indian Islands are still not shrinking due to climate change'