● Covered by 1 source · 1 reportHigh impact1 negative
Ocean oxygen loss threatens Earth's stability, researchers propose adding to Planetary Boundaries
Key points
- Aquatic oxygen loss is rapid and widespread across oceans, coasts, rivers, and lakes.
- Deoxygenation interacts with all nine existing Planetary Boundaries.
- Researchers propose adding dissolved oxygen conditions to the Planetary Boundaries framework.
- Human-caused warming, nutrient pollution, and changes in water ventilation drive oxygen loss.
Threat to Earth's Stability
Scientists at UC San Diego’s Scripps Institution of Oceanography have published a review paper indicating that the rapid decline of oxygen in aquatic environments, known as deoxygenation, is moving Earth into an "unsafe space." This loss of oxygen could lead to irreversible consequences on human timescales, affecting the planet's overall stability.
Interactions with Planetary Boundaries
The study reviews the extensive interactions between aquatic deoxygenation and the nine processes outlined in the Planetary Boundaries framework. This framework, established in 2009, identifies critical Earth system processes that human activities are pushing beyond stable conditions. The nine boundaries include climate change, ocean acidification, and biodiversity loss.
Proposal for New Boundary
Lead author Erica Ferrer and senior author Lisa Levin propose that dissolved oxygen conditions be added to the Planetary Boundaries framework. They argue that this addition would help scientists and policymakers better understand the impacts of deoxygenation on Earth system stability and encourage a combined approach to addressing planetary stressors.
Drivers and Impacts of Deoxygenation
Aquatic deoxygenation is primarily driven by human-caused warming, excessive nutrient pollution, and altered ventilation of interior waters. This oxygen loss disrupts biological and chemical processes vital for regulating Earth's climate and poses a threat to aquatic life, from microscopic organisms to large marine animals like fish and sharks, by altering their habitats, prey, and food webs.
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Reporting from
A new review paper from UC San Diego’s Scripps Institution of Oceanography warns that rapid oxygen loss in aquatic ecosystems is pushing Earth towards an "unsafe space" with potentially irreversible consequences. The researchers propose adding aquatic deoxygenation to the Planetary Boundaries framework, highlighting its widespread interactions with existing critical Earth system processes.