Table 1. Structural indicators of old growth

Stand density (e.g., number of trees, basal area, or stand density index)
Spatial distribution of old trees (clumped or random)
Species composition
Live crown ratio
Diameter class distribution
Age class distribution
Age of oldest trees
Number of canopy layers
Canopy cover
Snag density (number of dead trees)
Dead and downed logs (number or volume of downed logs)
Amount of dead or broken tops/boles