Many important processes underpinning the complexity of the Great Barrier Reef have also been declining as a result of climate change, including reef building and recruitment. ![]() In addition to the decline in coral cover and other impacts caused by the bleaching events, ongoing declines have also been noted across a range of other attributes comprising the sites's OUV, as evidenced by the declining trends in loggerhead, hawksbill and northern green turtle populations and scalloped hammerhead shark, deteriorating trends in many seabird populations and possible declines in some dolphin species. While individual decisions and management approaches appear in themselves adequate, the cumulative impacts of many decisions, on top of the legacy impacts and impending impacts of climate change, are of concern. Other pressures cannot be addressed at the site level, such as climate change, which is recognized as the greatest threat to the Outstanding Universal Value of the site. Some of the activities causing a threat to the values of the site can be influenced by the management authorities, such as fishing and coastal development. There has been a further dramatic decline as a result of the 2016, 20 coral bleaching events. Regrettably, a number of values for which the Great Barrier Reef was inscribed on the World Heritage List have been declining significantly. ![]() The Great Barrier Reef, one of the earliest properties to be inscribed as World Heritage, is a global icon.
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