Indicators of tree condition

Indicators of tree condition (Eichorn and Roskams, 2013).
Link to this table

Variable	Nature	Target	Scoring
Primary production
Defoliation	Estimate of the leaf/needle loss in relation to a reference standard	Assessable tree crown	5% classes, from 0 to 100
Apical shoot architecture	Estimate of the shoot development in relation to the standard of an adaptable tree crown	Apical tree crown	Classes
Fructification	Relative estimate of fruits	Whole tree crown	Classes
Fruit biomass	Biomass of fruits in litterfall traps	stand	Biomass per hectare
Diameter growth	Measurement of diameter growth	Stand	Diameter in cm
Ecosystem disturbances
Biotic/abiotic agents	Occurrence and diagnosis of symptoms and signs	Whole tree	Affected part, symptom, symptom specification, quantification (classes)
Tree removals and mortality	Recording of absent trees and causes of disappearance	Plot	Number of trees and classification of causes
Ecosystem internal (inherent) regulation
Age of trees	Measure or estimate tree age	Sample trees	Years
Stand structure	Meaure tree-related stand structure	Sample trees	Sample tree-specific relative score