AAP: Northern parts of the Great Barrier Reef are likely to suffer severe coral bleaching this summer, the conservation group WWF Australia warns. A report from the US government’s National Oceanic and Atmospheric Administration forecasts severe bleaching for parts of the Coral Sea, the Coral Triangle and the reef, WWF said. Coral bleaching is a process in which coral loses its colour and can’t exist in balance with its symbiotic algae, which causes coral to deteriorate and/or algae …