Rising frequency of marine heatwaves threatens global ocean ecosystems

Nature · Published 2 October 2026 Swipe more like this →

In short: Researchers reviewing oceanographic trends found that marine heatwaves—distinct periods of unusually warm water—have grown more intense and frequent over the last century. These thermal extremes act as pervasive stressors that can disrupt the integrity of marine life across the globe, affecting everything from individual organisms to entire community structures.

This review synthesizes current knowledge regarding how these temperature spikes impact biological life at various scales, including individuals and entire ecosystems. By examining how heatwaves influence ecosystem services, the authors highlight the urgent need for better predictive models and management strategies.

Because this is a comprehensive review of existing literature rather than a single experiment, the findings represent a synthesis of many different studies rather than a single new observation.

Why it matters: As ocean temperatures rise, understanding the biological impacts of heatwaves is essential for ecosystem management.

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