Transect 28 / rain after midnight / soil at 11.8C

Underwood Network

A forest-floor research collective tracing the fungal internet below Hartwood Vale, where carbon debt, drought warning, and mineral credit move through living threads before any tree looks troubled above ground.

Live hyphae: 19.4 km
Root clients: 284
Pulses tonight: 7,812

Living Problem Map

Physarum routes repricing the cheapest nutrient path

rerouting clay-sink nitrogen

The question under review

Which living corridor keeps young beech alive when the upper slope dries?

Carbon creditors

Old hemlocks above the ravine export 43 percent more soluble carbon after fog-heavy nights. Underwood marks those roots as creditors, then watches which fungal lanes carry the surplus downhill.

+43% fog carbon

Mineral debt

The beech ring borrows phosphate when leaf-out outruns root hair growth. In June, its best lender was not the nearest stump but a moss-covered nurse log three meters east.

3.1 m avoided lane

Alarm traffic

Birch Fen sends drought signals 9 to 14 hours before canopy wilt. The simulation weights those pulses as urgent nutrients, so the visible veins thicken around warning paths first.

14 h early warning

Nutrient exchange diagram

Tree and fungus bargain in pulses, not metaphors.

Each animated lane below represents a measured transfer from Underwood collars: photosynthate moves from leaf to root, fungal partners return phosphorus and water, and amber stress signals travel sideways when one organism starts running out of time.

Carbon price: 1.8 mg C
Water return: 4.1 uL
Latency: 17 min

The dashed lanes are intentionally uneven: Underwood treats every route as a negotiation, so speed, return, and alarm pressure drift when the scenario changes.

Field notes

The forest writes back in wet numbers.

18 May, 05:40

Fog collar reading, Hemlock Elder

Dr. Mara Venn reports a carbon pulse rising from 2.4 to 6.9 milligrams per root tip after three hours of ridge fog. The map rerouted through a stonecap nursery instead of the shorter clay corridor, suggesting the network paid a resilience premium.

rhizotron H-11

21 May, 22:15

Birch Fen alarm

Amber voltage flickered 31 minutes before leaf conductance dropped. The fungal strand carried the warning to two beech seedlings that had no direct root contact with the birch.

sensor braid B-4

2 June, 13:10

Nurse log arbitration

The nurse log held sugars for 47 minutes, then released half toward the lower ring. Underwood classifies this as escrow behavior: slow, precise, and impossible to see from the trail.

chip chamber L-7

9 June, 02:32

Spore amber event

After rain, Mycena aurorae lit the deadfall in twenty-three small blue points. Every point sat within 14 centimeters of an older exchange vein.

night transect N-2

Species ledger

Invented Latin, observed behavior, unsettled debts.

Species Signal color Known bargain Reliability

Mycena aurorae subterrisblue-pin lantern mycena teal flash maps old veins after rainfall; favors decaying birch 91%

Lactarius nummus-ligniwood-coin milkcap amber milk trades phosphorus for hemlock sugars during fog 84%

Cortinarius velum-noctisnight-veil webcap moss green stores nitrogen in cold clay, releases under drought alarm 76%

Boletus ferrarius minoriron-thread bolete rust pulse binds iron near basalt stones; dislikes ash-rich soil 68%

Underwood method

A page that computes while it speaks.

The live canvas does not replay a video. It runs a compact agent model: mobile bodies smell virtual pheromone, choose stronger lanes, deposit their own trace, and gradually thicken the best routes between research nodes. Each nutrient input adds a temporary field, so the visible network rebalances instead of merely glowing on command.

Collar data: 18 root collars record sugar flux every 12 minutes.
Moisture braid: 42 pins track clay tension across the lower slope.
Spore cameras: two night lenses count bioluminescent fruiting points.