authority: folia
slug: vegetation-stress
name: Vegetation Stress
domain: land
subdomain: biosphere
authority_id: folia:vegetation-stress
external_ids:
  nvs_uri: null
  cf_standard_name: null
description: |
  Physiological response of vegetation to adverse conditions — drought, heat,
  nutrient deficiency, disease, pest pressure. Manifests in reduced
  photosynthetic activity, leaf moisture loss, pigment shifts, and altered
  canopy structure. Captured by combinations of moisture, chlorophyll, and
  pigment indices (NDMI, NMDI, PRI, MCARI, NDRE) rather than a single
  spectral signature.
theme: vegetation
match_tags: [stress, drought, heat, pigment-shift, water-stress, senescence]
status: documented