Mushrooms and Climate Change: Nearly a Third of Studied Species Threatened with Extinction

Climate change is leaving its mark – even underground. Mushrooms, the hidden rulers of our forests, are increasingly under pressure. A recent analysis has reached an alarming conclusion: nearly one in three studied mushroom species is threatened with extinction. What does this mean for ecosystems, for our forests, and for mushroom foragers? An overview.

What the New Study on Mushrooms and Climate Change Says

The news has been making the rounds in recent days: “Nearly 1 in 3 Studied Fungi Threatened With Extinction From Deforestation, Climate Change” – that's the title of an analysis picked up by Earth.Org. The underlying research examined numerous mushroom species worldwide and concluded that about 30 percent of the recorded species are endangered due to the combination of deforestation and climate changes. Particularly affected are species that depend on old, undisturbed forests – precisely those habitats that are shrinking due to human intervention and increasing drought. The numbers are sobering, but they also show: mushrooms and climate change are inextricably linked. To understand the state of our forests, we must look at the soil and its inhabitants.

Why Mushrooms Are So Important for the Climate

Mushrooms are far more than just collectibles. They form symbiotic networks with trees – the so-called mycorrhizal networks. Through these underground connections, trees exchange nutrients and water, warn each other about pests, and store carbon in the soil. When mushroom species disappear, this network collapses. The result: forests become more vulnerable to drought stress, pests, and storms. Additionally, mushrooms play a key role in decomposing organic matter. They transform dead plant parts into humus, releasing nutrients that benefit the forest. A loss of mushroom diversity thus weakens the entire forest ecology – and with it, the forests' ability to sequester CO₂. In times of climate change, this is a double burden.

Range Shifts and Phenology: Mushrooms Respond to Change

Climate change alters not only the quantity but also the timing. Many mushroom species now fruit earlier in the year than they did a few decades ago – a classic phenological phenomenon. At the same time, their ranges are shifting: heat-loving species are moving northward or to higher elevations, while cold-loving species are being pushed back. In Central Europe, we observe that summer drought periods drastically reduce the fruiting of many edible mushrooms, while heavy autumn rains lead to short, intense flushes. These fluctuations make planning harder for foragers – and they stress the mushrooms themselves. Those who want to follow the developments can find current sighting data on the FungiFind Mushroom Map and observe how the season shifts locally. The FungiFind Blog also regularly covers topics related to mushrooms and climate change.

What Does This Mean for Our Forests and Mushroom Foragers?

The threat to mushrooms is not just an aesthetic problem. When mycorrhizal fungi fail, trees also suffer – they get less water and nutrients and become more susceptible to diseases. Forestry measures must therefore increasingly focus on preserving soil fungi. For mushroom foragers, this means: forage more consciously, spare red-listed species, and follow sustainable harvesting practices. Those seeking specific species can check the FungiFind Species Lexicon for conservation status and identification features – for example, the saffron milk cap (Lactarius deliciosus), a mycorrhizal fungus that mainly occurs in pine forests. Such edible mushrooms depend on intact forest soils. A closer look is worthwhile: many mushrooms are difficult to identify without expert knowledge; never rely on mere guesswork. This article is for informational purposes only and does not replace professional on-site mushroom advice.

What We Can Do Now

The study shows: it's high time to act. Protecting forests is the best climate protection – and thus also the best protection for mushrooms. This includes preserving old forests, avoiding clear-cutting, and promoting nature-friendly management. Everyone can contribute: buy regional mushrooms or forage them yourself, but always with respect for nature. And for those interested in the connections, the FungiFind Mushroom Map offers a tool to observe your own region. The weather score in the app helps assess when conditions are favorable for mushroom growth – scientifically based and locally adapted. This turns foraging into a small citizen-science project: the more data we share, the better we understand how mushrooms respond to climate change.

Conclusion: Mushrooms and Climate Change – A Topic That Concerns Us All

The news of the threat to nearly a third of studied mushroom species is a wake-up call. Mushrooms are not only culinarily valuable; they are systemically important for our forests. Climate change alters their habitats, their timing, and their networks. We must take these changes seriously – and act. The good news: it's not too late yet. Those who protect forests protect mushrooms. And those who protect mushrooms protect the climate. Stay curious, observe nature, and share your findings – preferably with the FungiFind community.