leading to coral bleaching, more extreme weather events and ocean acidification
Human influences resulted in a 50% decline in coral cover* between 1985 - 2012.
The Great Barrier Reef is a global icon under pressure. Notwithstanding positive actions since 2009, the greatest risks to the Great Barrier Reef remain unchanged. Great Barrier Reef Outlook Report 2014, Great Barrier Reef Marine Park Authority
* This does not take into account some coral recovery in recent years, or the global bleaching event in early 2016.