vegetation-state-utac

GenesisAeon Package 91 — real vegetation drought-stress and hydraulic-failure mortality science. Deliberately has no UTAC/CREP/AFET bridge — see DISCLAIMER.md.

For a plain-language explanation of the same topic (German, no jargon, written for general audiences), see WHITEPAPER.md.

What's real here

• Choat et al. (2012, Nature): 70% of 226 tree species worldwide operate with narrow (<1 MPa) hydraulic safety margins against drought stress.
• Adams et al. (2017, Nature Ecology & Evolution): drought-induced tree mortality consistently associated with ≥60% loss of xylem hydraulic conductivity.
• Gazol et al. (2025, Nature Communications): 96% of 940 documented global tree-mortality events were preceded by extreme drought.
• Explicitly not framed as a single bistable tipping element — see DISCLAIMER.md.

Quickstart

pip install vegetation-state-utac

from vegetation_state_utac import stress_stage, StressStage

stage = stress_stage(conductivity_loss_fraction=0.65, lai_decline_fraction=0.5)
assert stage == StressStage.LIKELY_MORTALITY

Development

pip install -e ".[dev]"
pre-commit install
ruff check src tests
mypy src
pytest

Citation

See CITATION.cff and .zenodo.json.