How Do Fungi Keep the Planet Healthy?
Summary
Hosts and evolutionary biologist Toby Kears explore the vital role of mycorrhizal fungi, which connect plant roots in vast underground networks. Kears explains how these fungi facilitate nutrient exchange, regulate climate by sequestering carbon, and even engage in complex economic behaviors like price-gouging and partner discrimination. The discussion highlights the "wood wide web" as a living circulatory system essential for soil health and biodiversity. Kears also shares her work with the nonprofit SPUN, which aims to map and protect these invisible ecosystems globally through field expe…
Topics discussed
Intro: The Deep End podcast ad
Setting the scene: Central Park and the dirt
Introduction to mycorrhizal fungi and guest Toby Kiers
The ancient partnership: Fungi as the first root systems
Visualizing the network: Tubes, nodes, and imaging robots
The physics of flow: Lipids, pressure, and the Galileo analogy
How nutrients move: Molecular motors and aquaporins
Climate impact: 13 billion tons of CO2 and food security
The case for caring: Biodiversity and nutrient cycles
The underground economy: Symbiosis as market trade
Lab experiments: Plants discriminating between fungal strains
Strategic behavior: Price gouging and shading effects
Cheaters and complexity: Orchids and emergent intelligence
Consciousness in networks: Anthropomorphism vs. mechanics
Defining intelligence: Information processing without a brain
Microbes vs. macrobes: The scale of fungal networks
Soybeans and bacteria: Nitrogen fixation and oxygen control
The cheat experiment: Argon gas and plant responses
Tools of the trade: Quantum dots and fluorescent tracking
Bacteria in the network: Meniscus movement and manipulation
The Underground Atlas: Mapping global fungal diversity
Fieldwork and hotspots: Finding the Amazon of the underground
Charisma of fungi: Spores, clouds, and microscopy
Rethinking life: Interdependence and the nature of individuals
Challenging sex: Dual genomes and genetic continuity
Cooperation and conflict: Tension as a driver of evolution
Closing thoughts: Lessons from nature and the boundary of life
Outro: Credits and subscription information
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