CANOPY TRANSECT & XYLEM SAP TENSION
STATUS: STABLE EQUILIBRIUM
Presets:
Xylem Tension (Ψ)
-2.8 MPa
Threshold Ψ50: -2.4 MPa
Leaf Area Index (LAI)
2.8 m²/m²
Pre-pulse: 5.8 m²/m²
Vapor Pressure Deficit
3.4 kPa
Stomatal closure trigger: 2.2 kPa
Cavitation Risk (PLC)
62%
Percent Loss Conductance
⚠️ Widespread Canopy Dieback in Progress
Extreme vapor pressure deficit and prolonged xylem cavitation breach hydraulic safety margins. Stomata close to prevent embolism, shutting down carbon assimilation and triggering leaf senescence.
HYDRAULIC VULNERABILITY CURVE (P50 EMBOLISM)