Table 5.

Comparison of assessment criteria for eighty fallen urban trees compared to fifteen wind-thrown forest trees.

CriterionForest trees positive for criterion (%)Urban trees positive for criterion (%)
Evidence of the loss of descending (sinker or vertical) roots10088.8
Significant damage and/or decay to exposed lateral roots4087.5
Evidence of soil compaction in immediate vicinity of the trunk065.0
Indicators of waterlogging in immediate vicinity of the trunk66.656.3
Evidence of site or trenching works within four meters of trunk058.8
Presence of fill around base of tree037.5
Canopy dieback and deadwood8032.5