Science

The tropics weren't always the most diverse marine environments, study finds

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Based on a feed excerpt; full article content has not been acquired. Source evidence retrieved 12/11/2026, 11:25:25 UTC.

Briefings

A recent study indicates that marine biodiversity is higher in tropical waters than in polar regions, challenging the long-held belief that the tropics were the most diverse marine environments. The research highlights a decline in marine biodiversity from the equator toward the North and South poles, a phenomenon known as the latitudinal diversity gradient.

Key points

• Tropical waters currently host a wider range of marine animals than polar waters.
• The latitudinal diversity gradient shows a decline in marine biodiversity from the equator toward the poles.

Context

This finding suggests marine biodiversity patterns may shift as climate change alters ocean temperatures and currents, potentially reducing the diversity of marine life in polar regions.

Limitations

The evidence is limited to a single sentence from a research article published in 2026. No specific species, geographic locations, or quantitative data are provided. The study does not specify the timeframe of the observed decline or the exact mechanisms driving the shift in marine biodiversity patterns.

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