Fungi and Climate Change: The Hidden World of Fungi and Their Ecological Roles

The Naked Scientists survey the fungal kingdom, from ancient plant mutualisms to modern medicine and climate change. Through interviews with Wellcome Trust’s Sumi Robson and Will Tingle at Kew Gardens, the episode reveals how fungi underpin plant life, drive nutrient cycles, and contribute to drugs like penicillin, while highlighting the vast, largely undescribed diversity of fungi and the shifting ecology driven by a changing climate. It also discusses emerging fungal threats such as Candida auris and the role of fungal networks in soil and crop health.

• Cordyceps and mycorrhizal relationships show fungi as key players in plant nutrition and ecosystem health.
• Fungi have been central to medicine, with major drugs and future potential in carbon cycling and sustainable agriculture.
• Describing fungal diversity and taxonomy at scale, from the Kew Fungarium to DNA based species delimitation.
• Climate change is altering fungal fruiting, distribution, and disease dynamics, prompting cross disciplinary action across clinicians, farmers and policymakers.

Overview and scope

The episode is the first in a two part series on the hidden world of fungi. Hosted by the Naked Scientists, it surveys how fungi are not only ancient and widespread but also crucial for life on earth. The program features Wellcome Trust senior research manager Sumi Robson discussing the fungal kingdom’s breadth and the plant fungal mutualisms that enabled terrestrial life. The conversation also touches on fungi in medicine, carbon storage, and potential roles in climate solutions, with emphasis on the need to map fungal diversity and function as climates shift.

Fungi in evolution and plant mutualisms

Fungi are described as a kingdom parallel to animals and plants, including unicellular yeasts and vast multicellular networks. A key point is the mycorrhizal relationship between fungi and plants, a symbiosis that allowed plants to colonize land by supplying nutrients from soil to plants in exchange for sugars. This relationship is widespread, with estimates suggesting that about 90% of plants benefit from fungal partnerships, highlighting fungi as indispensable for terrestrial ecosystems and sustainable agriculture.

Fungal roles in soil, ecology and medicine

The podcast explains how fungi decompose organic matter and minerals, enabling nutrient release for plants. Fungi can break down tough substrates such as rock and even plastics, underpinning soil fertility and carbon cycling. Medically, fungi have yielded antibiotics like penicillin and immunosuppressants such as cyclosporine, illustrating their profound impact on human health. The discussion also explores the potential for fungi to aid in carbon capture and sustainable farming by optimizing plant-fungus interactions and soil health.

Diversity, taxonomy and the Fungarium at Kew

A central theme is the enormous, largely unexplored fungal diversity. Sumi Robson notes that there may be around 4 million fungal species globally, with only about 10% described. Will Tingle reports from Kew Gardens Fungarium where 1.1 million specimens exist and the majority are herbarium samples. The conversation emphasizes that traditional morphology based taxonomy is being revolutionized by DNA sequencing, which can reveal cryptic species and redefine fungal diversity. A memorable example is the misidentification of dried Boletus edulis mushrooms, where 13 dried specimens represented three distinct species new to science when sequenced.

Climate change, fungal disease and future directions

The program addresses climate driven changes in fungal ecology, including shifts in autumn fruiting times and changes in decomposition rates that may affect carbon dynamics. There is concern about climate change driving the emergence and spread of harmful fungal pathogens such as Candida auris, which has become a global health challenge. The discussion emphasizes cross disciplinary collaboration among clinicians, farmers, ecologists and policymakers, and highlights the development of new antifungal agents and agricultural strategies to mitigate risk while supporting food security and biodiversity.

Outlook

The episode closes with optimism about increased awareness and interdisciplinary dialogue, as well as the promise of novel molecules that could treat infections in humans and support sustainable agriculture. The Naked Scientists signal a second installment to further explore fungal threats and mitigation strategies.