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An illustrated diagram labeling various parts of a large, old tree trunk, roots, and canopy, detailing features like cavities, fungi, and rotting wood.

An illustrated diagram labeling various parts of a large, old tree trunk, roots, and canopy, detailing features like cavities, fungi, and rotting wood.

CANOPY β”Œβ”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β” β”‚ Dead branches (D1) β”‚ β”‚ Exposed sapwood (D2) β”‚ β”‚ Fungal brackets (F1) β”‚ β””β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”˜ / | \ / | \ / | \ BRANCH CROTCHES (MOIST ZONE) β€’ Sap runs (S1) β€’ Water pockets (W1) β€’ Bark fissures (B3) β€’ Small cavities (C2) \ | / \|/ TRUNK β€’ Trunk cavities (C1) β€’ Woodpecker holes (C3) β€’ Rot columns (R1) β€’ Loose bark plates (B1) β€’ Annual fungal bodies (F2) || || || BASE OF TRUNK β€’ Basal cavities (C4) β€’ Soil‑contact fungi β€’ Moist bark pockets / \ / \ ROOT SYSTEM β€’ Shallow lateral roots β€’ Buttress roots β€’ Root‑plate cavities (RZ1) β€’ Mycorrhizae at root edge (M1) β€’ Soil invertebrate habitat See more