Nature's internet: how trees talk to each other in a healthy forest | Suzanne Simard | TEDxSeattle

Tight-knit human social networks create resilience because members exchange care, assistance, and emotional support when someone weakens, functioning analogously to how organisms exchange resources and signals in ecological networks to sustain the group.

Converting diverse old-growth into monoculture plantations and removing companion species disrupts mycorrhizal support networks, which increases disease spread and accelerates tree decline because trees lose mutualistic protections and nutrient-sharing partners.

Longstanding Indigenous stewardship represents systematic, long-term empirical knowledge because sustained practices of reciprocity and resource management reflect repeated observation and feedback-driven strategies that effectively managed ecosystems over millennia.

Because ecosystems are sensitive to interaction patterns and feedbacks, restoring or respecting key species and nutrient flows can alter feedback loops and flip a degraded system back toward recovery rather than collapse.

Ecosystem resilience emerges from many species interactions because those interactions create feedbacks and cycles (like nutrient cycling and predation) that sustain function; removing key parts can break feedbacks and flip the system into degraded, hard-to-reverse stable states.

Nitrogen from decaying salmon carcasses enters forest soils and is absorbed by mycorrhizal networks, which then redistribute that marine-derived nitrogen through tree-to-tree connections, linking ocean productivity to forest growth and health.

Removing seemingly competitive species like birch breaks mutualistic fungal and nutrient exchanges in the mycorrhizal network, which reduces tree health and undermines the overall resilience of the forest.

Mother trees preferentially allocate more carbon to genetically related seedlings because they can direct resources through fungal links to kin, especially after injury, effectively passing support and fitness benefits down their genetic lineage.