Forests on Forests
Apr 24, 2026
Summary
Radiolab explores the hidden ecosystems within forest canopies, featuring ecologist Nalini Nadkarni and researcher Karina Mifune. They reveal that tree branches hold deep soil layers teeming with life, including salamanders and aquatic copepods. These "sky gardens" provide crucial nutrients like nitrogen and phosphorus, allowing trees to grow roots upward to access resources when the forest floor is scarce. This discovery highlights a complex, vertical layer of biodiversity often overlooked by science.
Topics discussed
Home Depot Spring Garden Deals
Introduction: From Tree to Shining Tree and the Underground Network
Meeting Nalini Nadkarni: The Queen of the Canopy
Discovering Soil and Life in the Tree Canopy
Canopy Biodiversity: Salamanders and Aquatic Copepods
Canopy Soils: Nutrient Richness vs. Forest Floor Scarcity
Sponsors: MoMA PS1, Optum, Home Depot, and Audi
Trees Growing Roots in Canopy Soil for Nutrients
Fractal Forests: Trees Growing on Trees
Credits, Acknowledgments, and Closing Ads
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