The harmful bleaching of corals around the world has increased to affect 84% of the ocean coral reefs, marking the most intense event in recorded history, as announced by the International Coral Reef Initiative on Wednesday.
This is the fourth global bleaching event since 1998, surpassing the 2014-17 bleaching that impacted two-thirds of the reefs during that time. The current crisis began in 2023, and it remains unclear when it will end, with ocean warming being criticized for the phenomenon.
Mark Eakin, the executive director of the International Coral Reef Association and former coral monitoring officer for the US National Marine and Atmospheric Administration, stated, “We’re witnessing a complete transformation of the planet and its impact on our oceans’ ability to sustain life and livelihoods.”
Last year was reported as the hottest year on record globally, with average sea surface temperatures for oceans away from the poles reaching 20.87 degrees Celsius (69.57 degrees Fahrenheit), which is detrimental to corals. These structures are vital for seafood production, tourism, and protecting coastlines from erosion and storms. Coral reefs are often referred to as “rainforests of the sea” because they host a significant amount of marine biodiversity, with approximately twenty five% of all marine species living in and around them.
Corals house colorful algae, which give them their vibrant hues and serve as a food source. However, prolonged warming causes the algae to release toxins, leading to coral bleaching where they expel the algae and turn white. Weakened corals are at an increased risk of death due to these events, prompting NOAA’s Coral Reef Watch program to introduce additional levels to the bleaching alert scale to convey the heightened risk of coral mortality.
Efforts to conserve coral reefs are underway, such as initiatives to restore coral populations. Dutch labs are working with coral fragments, including those sourced from the Seychelles, with the intention to propagate them in zoos for potential reintroduction to natural reef habitats. Similar projects, including those in Florida, aim to rescue at-risk corals from high temperatures and rehabilitate them before returning them to the sea.
Nevertheless, scientists stress the importance of reducing greenhouse gas emissions like carbon dioxide and methane to combat planet-warming effects and protect coral reefs.
Melanie Mcfield, co-chair of the Caribbean Steering Committee for the Global Coral Reef Surveillance Network, emphasized, “The most effective way to safeguard coral reefs is to address the root causes of climate change by reducing human emissions, primarily from fossil fuel combustion. Inaction poses a significant threat to coral reef ecosystems.”
This update coincides with President Donald Trump’s efforts to bolster fossil fuels and scale back clean energy initiatives as he enters a second term, prompting concerns about the future of coral reefs. Eakin remarked, “The current government is actively dismantling these ecosystems, and eliminating their protections would have catastrophic consequences.”
Source: www.nbcnews.com
