The Global Observations of Coral Disease data were originally compiled by the UN Environment Programme's World Conservation Monitoring Centre (UNEP-WCMC) and have been updated by ReefBase since 2002. The data indicate observations made of global coral reefs, whether there was observed disease or bleaching, and if so, the type of disease or severity of the bleaching. Data are sourced from academic literature, government authorities, and a range of community members who can submit observations of coral bleaching through an online form: http://www.reefbase.org/contribute/bleachingreport.aspx. Resource Watch shows only a subset of the data set. For access to the full data set and additional information, see the Learn More link.
ReefBase Global Database: Threats
The database does not seem to have been updated past 2012. Reports may not be comprehensive of all bleaching events on all reefs. Many of the bleaching records do not specify the severity of bleaching events.