Analysis / report

The Great Barrier Reef Latest

Protecting the Most Climate Vulnerable

By David Spratt
Tuesday 11 November, 2025
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The Great Barrier Reef, a globally unique marine ecosystem, is in a death spiral from climate-driven impacts. What scale and speed of action would be required to save it from collapse?

Summary

  • The Reef harbors 600 coral species; with unparalleled global biodiversity.

  • Climate-driven bleaching is degrading ecosystems at unprecedented scale.

  • Current mitigation strategies are insufficient; urgent intervention is required.

  • Stabilizing CO₂ to under 320 ppm is critical for reef survival.

Coastal and ocean ecosystems in Australia, including coral reefs, mangroves, and kelp forests, are rapidly degrading as the sixth mass extinction accelerates under climate change. Coral systems are vital, supporting up to half of all marine species during their life cycles. Historically, reef destruction has triggered oceanic ecological collapse and preceded mass extinctions, with recovery taking hundreds of thousands to millions of years. This case study explores the actions needed to provide maximum protection for the Great Barrier Reef, drawing on existing scientific literature. It focuses on identifying the critical Earth system parameters affecting the Reef and the environmental conditions necessary for its long-term resilience and biodiversity preservation. Central questions include what climate conditions are required to safeguard the Reef and what interventions are needed to restore it to a thriving state. The study emphasizes urgent, evidence-based action to prevent further degradation and secure the Reef’s ecological and societal value.

If severe bleaching occurs regularly at shorter than 10–15 year intervals, then reefs face a death spiral

Charlie Veron
Marine Biologist and Coral Taxonomist
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report

The Great Barrier Reef

The Great Barrier Reef faces rapid decline; urgent, targeted actions are needed to restore ecosystems, safeguard species, and ensure survival.

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