Beneath the soil lies an immense fungal superhighway essential to sustaining life on Earth. For the first time, scientists have mapped these underground networks of arbuscular mycorrhizal fungi, revealing just how expansive and vital they are to ecosystems and carbon cycling worldwide.
- Fungal networks extend ~110 quadrillion km globally
- Support ~70% of plants by boosting nutrient and water uptake
- Help move 4 billion tons of carbon into soils each year
What happened
Scientists have created the first ever global maps detailing the distribution and density of arbuscular mycorrhizal (AM) fungal networks beneath the Earth’s surface. Utilizing data from over 16,000 soil samples worldwide and advancements in machine learning, the researchers estimated the physical extent and biomass of these critical fungal systems. Robotic imaging technology further helped analyze the intricate fungal structures grown in lab settings.
This comprehensive approach allowed the team to reveal that AM fungal networks collectively stretch across approximately 110 quadrillion kilometers and contain an estimated 300 megatons of carbon. These fungi form symbiotic relationships with around 70% of plant species, significantly contributing to nutrient exchange, water absorption, and carbon sequestration within soils.
Why it feels good
Learning about these enormous underground fungal networks sheds light on a hidden natural infrastructure that quietly supports life on land. Knowing that beneath our feet is a dynamic, interconnected system working diligently to nurture plants and regulate climate offers a new appreciation for the complexity and resilience of ecosystems.
With this knowledge, communities, scientists, and policymakers gain powerful tools to better monitor, protect, and restore these fungal networks. Such efforts can bolster soil health, help mitigate climate change impacts by enhancing carbon storage, and sustain plant biodiversity for future generations.
What to enjoy or watch next
The unveiling of the Mycorrhizal Infrastructure Map offers an interactive visualization that anyone can explore to see just how vast and varied fungal networks are across different terrestrial habitats. This publicly available resource invites curiosity and encourages wider engagement with soil biodiversity and ecosystem conservation.
Future research will likely build on these findings, using newly developed imaging and data science technologies to better understand fungal behavior, their responses to environmental changes, and opportunities to apply this knowledge in agriculture, forestry, and climate action strategies.