New research indicates that certain coral reef ecosystems around the world possess a greater capacity to endure and recover from the impacts of climate change than previously recognized. A study unveiled at a recent conference in Mombasa, Kenya, highlights approximately 166,000 square kilometers of reefs across 71 countries with climate resilience potential.

The investigation, conducted by the Wildlife Conservation Society in collaboration with Macquarie University, emphasizes that around 60 percent of these climate-resilient reefs are concentrated in Australia, the Bahamas, Cuba, Indonesia, and the Philippines. This finding offers a more nuanced perspective amid growing concerns over the accelerating rates of coral bleaching and extinction triggered by marine heatwaves.

Coral reefs are vital to marine biodiversity, supporting an estimated 25 percent of all marine life and providing food and livelihood resources for over 500 million people globally. They also function as natural barriers shielding coastlines from erosion and extreme weather events. However, the United Nations recently issued warnings about a “deepening crisis” facing oceans, citing intensifying heat absorption, pollution, and unsustainable fishing practices as key stressors.

Emily Darling, director of coral conservation at the Wildlife Conservation Society and a co-author of the study, said the findings challenge the narrative that coral reefs are irreversibly lost. “This research shows that there is a global set of reefs that have the potential to survive and recover,” she said, underscoring the urgent need for targeted conservation actions to safeguard these ecosystems.

The study attributes some reef resilience to their locations in relatively cooler oceanic zones, alongside the presence of coral species with branching and plating structures that may better withstand heat stress. For instance, parts of Australia’s Great Barrier Reef and the Palau archipelago have been identified as such refuges. Additionally, some stony corals have progressively adapted to temperature increases, while certain ecosystems demonstrate a more rapid recovery from damage.

The analysis draws on a comprehensive mapping tool leveraging over 45,000 field observations collected between 1960 and 2025. It also incorporates projections estimating reef damage through 2050 under a scenario of a 2.1 degrees Celsius rise in global temperatures relative to pre-industrial levels. These insights aim to inform conservation priorities by pinpointing reefs with the highest likelihood of long-term survival amidst climate challenges.