Australia’s Great Barrier Reef is experiencing significant heat-induced coral bleaching once again, as confirmed by the country’s government on Friday.
The Great Barrier Reef Marine Park Authority, responsible for conservation and protection efforts for the reef, stated that widespread bleaching is occurring due to increased heat stress over the summer.
Scientists from the Australian Institute of Marine Science reported that this is the fifth major bleaching event on the Great Barrier Reef since 2016.
Coral bleaching poses a serious threat to coral reefs worldwide, triggered by abnormal conditions such as high or cold seawater temperatures and increased acidity. When corals expel photosynthetic algae, they turn white, making them more vulnerable to disease.
While corals can recover from bleaching events, frequent occurrences make it difficult for reefs to bounce back. Climate change is causing ocean temperatures to rise, leading to more frequent bleaching events globally.
The current mass bleaching event on the Great Barrier Reef is consistent with reports of bleaching in coral reefs in the Northern Hemisphere, exacerbated by El Niño and climate change, according to the Great Barrier Reef Marine Park Authority.
The agency, in collaboration with scientists from the Australian Institute of Marine Science, conducted an aerial survey covering nearly two-thirds of the Great Barrier Reef Marine Park to assess the severity of the bleaching event.
Further research and underwater assessments are necessary to gauge the impact of the ongoing bleaching event, with plans for additional aerial surveys in other reef areas.
While heat stress has not affected the entire reef, variations exist in the extent of bleaching among different areas, as highlighted by Neil Cantin, a senior research scientist at the Australian Institute of Marine Science.
Since the first recorded bleaching event in 1998, with subsequent events in 2002, 2016, 2017, 2020, and 2022, it is clear that coral bleaching incidents are becoming more frequent, posing a significant threat to the Great Barrier Reef.
Efforts are underway to understand the overall condition of the reef and implement effective restoration measures guided by aerial surveys and underwater observations.
David Wachenfeld, the Australian Institute of Marine Science’s research program director, emphasized the urgent need to address climate change to protect the Great Barrier Reef effectively.
“Protecting coral reefs like the Great Barrier Reef from climate change requires global emissions reductions, best practices in local management, interventions to increase climate and reef resilience, and ongoing research and development,” Wachenfeld stated.
Source: www.nbcnews.com
