Scientists have mapped the planet's vast subterranean fungal networks, revealing a hidden system that spans more than 100 quadrillion kilometers in length and plays a critical role in maintaining the health of Earth's ecosystems. The research, led by evolutionary biologist Dr. Toby Kiers, highlights the often invisible force of fungi in supporting plant life, cycling nutrients, and storing carbon beneath the soil.
Dr. Kiers, founder of the Society for the Protection of Underground Networks, has dedicated her career to charting these underground systems. Her work has earned her a MacArthur fellowship and the Tyler Prize for Environmental Achievement, sometimes referred to as the «green Nobel.» The findings come from extensive fieldwork on the remote Palmyra Atoll in the Pacific Ocean, where Kiers and her team studied fungal networks in a pristine tropical environment.
The study reveals that subterranean fungal networks, composed of thread-like structures called mycelium, form an interconnected web that extends across continents. These networks act as a kind of underground internet, allowing plants to communicate and share resources. Fungi form symbiotic relationships with plant roots, trading nutrients like phosphorus and nitrogen for carbon sugars produced by plants through photosynthesis.
According to the research, the total length of these fungal networks is estimated at more than 100 quadrillion kilometers—a figure that dwarfs the scale of any known biological system on Earth. This immense network plays a crucial role in the global carbon cycle, as fungi store vast amounts of carbon in the soil, helping to mitigate climate change. The study also underscores the importance of protecting these underground ecosystems, which are often overlooked in conservation efforts.
Dr. Kiers emphasized that fungi are not just passive decomposers but active agents in shaping the planet's environment. Their networks help stabilize soil, prevent erosion, and support biodiversity above ground. The research on Palmyra Atoll, a remote coral atoll in the central Pacific, provided a unique opportunity to study fungal networks in an ecosystem largely untouched by human activity. The findings there are expected to inform broader understanding of how fungi function in different environments, from tropical forests to agricultural lands.
The study has significant implications for environmental policy and conservation. As scientists call for greater protection of underground ecosystems, the research highlights the need to include fungi in global biodiversity strategies. The Society for the Protection of Underground Networks, founded by Kiers, advocates for the recognition of subterranean life as a vital component of planetary health.
Dr. Kiers' work has been recognized with numerous awards, including the Tyler Prize, which honors achievements in environmental science, policy, and law. The MacArthur fellowship, often called the «genius grant,» supports her continued research into fungal networks. Her findings challenge the traditional focus on above-ground flora and fauna, urging a broader perspective that includes the hidden world beneath our feet.
The research also raises questions about the impact of human activities on fungal networks. Deforestation, intensive agriculture, and soil degradation can disrupt these delicate systems, potentially releasing stored carbon and reducing the ability of ecosystems to adapt to climate change. The study calls for more research into how to protect and restore fungal networks as part of broader environmental management.
In addition to their ecological role, fungi have potential applications in biotechnology, medicine, and agriculture. Understanding their networks could lead to new ways to improve crop yields, restore degraded soils, and develop sustainable materials. The study on Palmyra Atoll is part of a larger effort to map global fungal diversity and function, with implications for food security and climate resilience.
The findings were published in a study supported by the Guardian, which also produced a podcast featuring Dr. Kiers discussing her work. The research underscores the importance of fungi as an invisible force protecting the planet, and the need to recognize their role in maintaining the health of Earth's ecosystems. As scientists continue to explore the underground world, the study offers a new perspective on the interconnectedness of life on Earth.
