Science

Urban expansion causes ecological collapse in streams in the São Paulo Metropolitan Area

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Based on a feed excerpt; full article content has not been acquired. Source evidence retrieved 14/11/2026, 22:10:24 UTC.

Briefings

A 2026 Nature Cities study published in August 2026 found that urbanization in the São Paulo Metropolitan Area caused severe ecological collapse in local streams. The study revealed that urban expansion selectively eliminates organisms based on size and simplifies ecological interactions, reducing network complexity from 190 connections to just three.

Key points

• Urbanization in the São Paulo Metropolitan Area caused a reduction in ecological network complexity from 190 connections to just three.
• Degradation selectively eliminates organisms based on their size, leading to simplified ecological interactions in local streams.

Context

A study published in August 2026 in the journal Nature Cities investigated the impact of urbanization on the São Paulo Metropolitan Area, Brazil, revealing that metropolis expansion causes ecological collapse in local streams.

Limitations

Evidence is limited to a single study published in August 2026 in Nature Cities. The research covers only the São Paulo Metropolitan Area and does not include data from other regions or time periods.

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