Mongabay: Nearly one-third of reef-building corals are vulnerable to extinction, according to an assessment of 845 species of coral. Rising temperatures, increased incidence of disease, and human disturbance are driving the trend. Assessing the conservation status of corals from around the world using IUCN Red List Criteria, an international team of researchers found that 32.8 percent of reef-building corals are in categories with elevated risk of extinction. At greatest risk are corals in the …