Scientists have identified nearly 166,000 square kilometers [2] of coral reefs globally that are resilient to warming and bleaching caused by climate change.
This discovery provides a critical roadmap for marine conservation by pinpointing specific regions where corals are most likely to survive and recover. These "refuge" areas can serve as genetic reservoirs to help repopulate degraded reefs across the world's oceans.
The analysis, released this week, found that these resilient zones cover a larger area than previously estimated. While some reports cite more than 150,000 square kilometers [1], other data indicates the area is nearly 166,000 square kilometers, or about 64,000 square miles [2].
Researchers found that local conditions play a decisive role in this survival. Cooler ocean currents are a primary factor in protecting these ecosystems from the worst effects of rising sea temperatures [3], [4]. These currents act as a natural buffer, preventing the thermal stress that typically triggers mass bleaching events.
Notable resilient sites were identified off the coast of Kenya [5]. These regions, along with other areas influenced by cool currents, demonstrate a higher capacity to withstand the stressors of a warming planet [5].
By mapping these specific locations, scientists can now prioritize these zones for strict protection. Protecting these naturally resilient reefs ensures that the biological building blocks of coral ecosystems remain intact even as global temperatures rise.
“Scientists have identified nearly 166,000 square kilometers of coral reefs globally that are resilient to warming.”
The identification of these resilient reefs shifts the conservation strategy from a general effort to a targeted approach. By focusing on 'climate refugia'—areas naturally shielded from extreme heat—environmental agencies can protect the most viable populations of coral. This increases the likelihood that coral species will survive the current climate crisis and provide the necessary larvae to restore damaged reefs in the future.
