Author: Joseph Williamson, Research Fellow in Biological Responses to Climate Change, UCL

Last year, much of the world’s largest coral reef system was transformed into a white boneyard, featuring ghostly silhouettes of horns, brains and lettuces. The threat of sudden biodiversity loss from climate change had been realised through what’s known as a mass bleaching event. The abrupt loss of many species from a system is generally attributed to a breakdown in ecological functioning. As species are sequentially knocked out, the whole community becomes unstable, and it all comes crashing down. There is, however, another mechanism that may be at play. In our new paper, colleagues and I argue that despite the…