Science Friday Beavers could be humans' biggest ally, if we let them
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May 5, 2026 
Emily Fairfax, a beaver scientist and geography professor who advised Pixar, explains how beavers reshape landscapes and build wildfire- and flood-resilient wetlands. Zac Ziegler, an Oregon reporter, describes a local notch fence project that preserved beaver ponds and boosted wildlife. The conversation focuses on partnering with beavers, practical coexistence tools, and how public perception is changing.
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Partner With Beavers For Resilience
- Partnering with beavers leverages millions of years of natural engineering to boost biodiversity and climate resilience.
- Emily Fairfax argues humans should apply our strengths (planning, infrastructure) while letting beavers create wetlands that stop fires and support habitats.
Beaver Wetlands Reduce Wildfire Risk
- Beaver-created riparian wetlands reduce wildfire risk by keeping landscapes wetter and less flammable.
- Historically denser beaver populations created broad green corridors that would have made large fires far harder to spread.
Beaver Ponds Clean Contaminated Water
- Beaver ponds improve water quality by slowing flow so sediments and pollutants settle and by supporting microbes that remove nitrogen.
- Heavy metals and phosphates bind to fine sediments and are buried; microbes can convert nitrates into inert nitrogen gas.