Mongabay: Rising temperatures and acidity of the world’s oceans due to human emissions of carbon dioxide is putting marine food webs at risk warned a researcher speaking at a press briefing at the annual meeting of the American Association for the Advancement of Science in Boston. Gretchen Hofmann, associate professor of biology at the University of California at Santa Barbara, said that pteropods, tiny organisms that play a critical part in marine ecology, are likely to suffer from higher …