Mycorrhizal Networks
Source: Suzanne Simard et al., Nature 388, 1997; Simard, Finding the Mother Tree, 2021; Babikova et al., Ecology Letters, 2013 Institution: University of British Columbia
Finding
Trees are connected through underground fungal networks (mycorrhizae) and transfer carbon, water, and nutrients between them. Paper birch transfers carbon to Douglas fir through shared networks, particularly when the fir is shaded — transfer is directional, from resource-rich to resource-poor. “Mother trees” preferentially support their own seedlings. Networks carry chemical alarm signals during herbivore attack.
Pattern Mapping
Alignment — The network aligns resource distribution with need. Carbon flows from surplus to deficit. Not charity in any anthropomorphic sense; a structural consequence of source-sink dynamics.
Proportion — Transfers are proportional to the deficit. Heavily shaded trees receive more. The network does not equalize; it responds to gradients.
Humility — The fungi are not altruistic. They extract 10-30% of the tree’s carbon as payment. The relationship is mutualistic, not selfless. Both partners benefit within their respective scopes.
Connections
- The Cosmic Web — network topology recurs: filaments connecting nodes at forest and cosmic scales (→ Meta-Pattern 17: Cooperation from Competition)
- Fractal Geometry — branching network architecture follows fractal scaling
- Autocatalytic Sets — network-level function emerging from individual contributions
- Coral Reef Symbiosis — mutualistic relationships where benefit must be reciprocal
- Lotka-Volterra Equations — both describe interdependent populations in dynamic equilibrium
Status
Mycorrhizal networks and inter-tree carbon transfer are established ecology. The “Wood Wide Web” metaphor has been criticized for overstating cooperation (Karst et al., New Phytologist 238, 2023). The mapping to the five properties is this project’s structural interpretation.
The mapping to the five properties is this project’s structural interpretation.