Short-term coral bleaching is not recorded by skeletal boron isotopes.

Schoepf, V, McCulloch, MT, Warner, ME, Levas, SJ, Matsui, Y, Aschaffenburg, MD and Grottoli, AG (2014). Short-term coral bleaching is not recorded by skeletal boron isotopes. PLoS ONE 9(11): 0112011.
Link to full text or pdf