Scientists have issued a stark warning as the global coral bleaching crisis continues to escalate, spreading to new countries and deepening in severity. Amid unprecedented ocean temperatures, coral reefs around the world are experiencing widespread bleaching, threatening marine ecosystems and the livelihoods of millions who depend on them.
According to the US National Oceanic and Atmospheric Administration (NOAA), coral bleaching has been recorded in 62 countries and territories since February 2023, an increase of nine since April. Derek Manzello, coordinator for NOAA’s Coral Reef Watch program, emphasized the gravity of the situation, stating, “This event is still growing in size and impacts. This is not something that would be happening without climate change.”
Newly affected regions include India, Sri Lanka, and the Chagos Archipelago in the Indian Ocean. As ocean temperatures continue to soar, scientists fear that bleaching events could further impact reefs across Asia, including off the coasts of Mexico, Belize, the Caribbean, and Florida.
Coral bleaching occurs when corals, stressed by heat, expel the symbiotic algae living in their tissues, causing them to turn white. While corals can recover if conditions improve, prolonged stress often leads to coral death. The loss of coral reefs has far-reaching implications, affecting biodiversity, fisheries, tourism, and coastal protection.
The ongoing mass bleaching is the fourth global event on record, with previous episodes occurring between 1998 and 2017. Notably, approximately 60.5% of the world's reefs have experienced bleaching-level heat in the past 12 months—a record high, according to NOAA data.
Reefs such as the Great Barrier Reef off Australia and coral systems in Thailand have already been affected. The potential loss of these ecosystems underscores the urgent need for global action to address climate change and reduce other stressors like overfishing and pollution.
“The consequences of coral bleaching extend beyond the oceans,” Manzello warned. “They affect livelihoods, food security, and local economies. Protecting coral reefs is not just an environmental issue—it's a social and economic imperative.”
As scientists continue to monitor the expanding crisis, there is hope that concerted global efforts can mitigate the damage. Reducing greenhouse gas emissions and implementing sustainable practices are crucial steps toward preserving these vital ecosystems for future generations.
Reference(s):
Global coral bleaching event expanding to new countries: scientists
cgtn.com
