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

The advance of urbanization in the São Paulo Metropolitan Area in Brazil is causing the collapse of food webs in local streams. A study published in August in the journal Nature Cities reveals that the impact of the metropolis goes far beyond a simple reduction in species. Degradation selectively eliminates organisms based on their size and simplifies ecological interactions. Networks of 190 connections plummet to just three.