The Hidden Life of Trees

Cultural

Wohlleben spent over twenty years as a forester in the German state forestry service before taking a position as forest manager for the small municipal forest of Hümmel, where he was given latitude to depart from industrial-rotation forestry. The freedom to manage a forest as ecosystem rather than as plantation is the experiential ground for the book.

The German title — Das geheime Leben der Bäume — is a deliberate play on Das Leben der Bäume, a much earlier German forestry text. Wohlleben’s accomplishment was prose translation: taking material that was scattered across forestry research literature and rendering it in language that did not require a forestry degree. The book sold over a million copies in German alone and was translated worldwide.

The companion books — The Inner Life of Animals (2017), The Secret Wisdom of Nature (2019), The Heartbeat of Trees (2021) — extend the same approach to other domains. The Wohlleben Forest Academy in the Eifel region of Germany trains foresters and the public in his approach.

Scientific

The empirical claims Wohlleben develops:

• Trees of the same species form cooperative networks, transferring sugar to weakened individuals through mycorrhizal-network connections.
• Forest trees release defensive volatile compounds that signal neighboring trees of insect-pest pressure.
• Mother trees preferentially direct nutrient transfer to genetically-related saplings.
• Stumps of cut trees can be kept alive for decades by neighboring trees pumping sugar into them through fused root systems.
• Forest microclimate is collectively maintained by canopy closure and transpiration; clear-cut openings break the microclimate and stress remaining trees.

Some of these claims have been criticized by forest scientists as over-stated or anthropomorphized. The core mycorrhizal-network science is solid (Simard and others); some of Wohlleben’s specific framings (especially around tree “intentions” and “feelings”) are more interpretive. The book has been useful precisely because it states the case strongly enough for non-specialist readers to engage.

Critique

Forest scientists including Stephen Woodward, David Robinson, and Justine Karst have argued that Wohlleben (and Simard’s more popular formulations) overstate evidence on mycorrhizal-network mediation of inter-tree resource transfer. The 2023 Karst-and-colleagues review in Nature Ecology and Evolution presents the more cautious position: while mycorrhizal connections exist and some signaling occurs, the strong “[[mycorrhizal-network|wood wide web]]” claims are not as well-supported as the popular literature suggests.

Wohlleben himself has been more careful in later editions and interviews about distinguishing what’s well-established from what’s speculative.

Lenses still to grow

• The Hümmel forest and Wohlleben Forest Academy
• The German forestry-and-ecology tradition (continuous-cover forestry, Plenterwald)
• The Karst-et-al critique and the ongoing scientific debate
• The companion books’ extensions to animals, broader nature, and the heart

See also

Auto-generated from this entry’s typed relations: frontmatter, grouped by relation type so the editorial signal isn’t flattened.

• Enables: [[rewilding]]
• Shares approach with: [[gathering-moss]]
• Counterpart to: [[the-overstory]]
• Member of: [[book]]
• Featured in: [[mycorrhizal-network]]

Sources

• Peter Wohlleben, The Hidden Life of Trees: What They Feel, How They Communicate (English ed., Greystone, 2016)
• [[suzanne-simard|Suzanne Simard]], Finding the Mother Tree (2021)
• Karst, Jones, & Hoeksema, “Positive citation bias and overinterpreted results lead to misinformation on common mycorrhizal networks in forests” Nature Ecology and Evolution (2023)
• Wohlleben Forest Academy publications (wohlleben-forstakademie.de)

Rooted in life.