Great Barrier Reef Threatened by Record-Breaking Rise in Sea Temperatures Not Seen in Four Centuries

by | 11 August 2024 | Environment, GNV News, Oceania

GNV News August 11, 2024

According to a study published in Nature on August 7, 2024, the average sea surface temperatures in the Coral Sea from January to March in 2024, 2017, and 2020 (in descending order of mean sea surface temperature anomaly) were the highest in 400 years. The study warns that global warming could adversely affect the biodiversity and ecosystem of the reefs.

The Great Barrier Reef is the world’s largest coral reef system, stretching off Australia’s northeastern coast, and is a UNESCO World Heritage site that is home to more than 9,000 species. When seawater temperatures rise, bleaching occurs, but if it is mild, recovery is possible. However, due to warming, there have been five consecutive, large-scale bleaching events over the past nine years. In addition, as of April 2024, there is a report that about 60% of the Great Barrier Reef’s corals experienced bleaching and were exposed to levels of heat stress that increase mortality risk. Scientists are calling for a UN agency to give the reef an “endangered” designation to sound the alarm globally, based on this research.

 

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A coral reef undergoing bleaching (Photo: Acropora / Wikimedia Commons [CC-BY-3.0])

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