NPR: The region of the ocean known as “the desert of the sea” has expanded dramatically over the past decade, according to a new study. Scientists looking at the color of the ocean from space have found that vast areas that were once green with plankton have been turning blue, as marine life becomes scarcer. If it’s linked to global warming, as they suspect, this could be another blow for the world’s fisheries. Just as plants make up the base of the food web on land, tiny green …