Science

As ancient oceans warmed, carbon export and fish productivity surged

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Briefings

Recent satellite data indicates a decline in open-ocean fish stocks across the tropics over the last three decades, coinciding with rising ocean temperatures. While historical exploitation has reduced populations, future outcomes remain uncertain due to conflicting climate model projections regarding global trends by the century's end.

Key points

• Open-ocean fish stocks in the tropics have declined over the last three decades due to increased exploitation alongside warming oceans.
• Future fish population trends are uncertain, with climate models projecting either increases or decreases in global trends by the end of this century.

Context

This finding highlights the complex interplay between historical fishing pressures and current climate change impacts on marine ecosystems, with implications for global fisheries management.

Limitations

Data covers the last three decades with remote sensing limitations; future projections vary between climate models and remain uncertain.

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