Pruning affects tree movement in hurricane force wind

Edward F. Gilman, Forrest Masters, Jason C. Grabosky

Research output: Contribution to journalArticlepeer-review

22 Scopus citations


The goal of this study was to determine how different pruning techniques affect trunk movement on live oak subjected to hurricane force winds. Tree movement in wind on nonpruned trees was compared with movement on trees with crowns thinned, reduced, or raised. Twenty trees were blown using a wind generator up to 45 m/s (110 mph) maintained for 3 min. Each tree was instrumented with three orientation sensors at set heights along the trunk to measure its deflection. Thinning or reducing crowns significantly reduced upper trunk movement at all wind speeds, whereas raising did not. Lower trunk movement was not affected by pruning type. These data indicated that foliage and branches toward the top of tree crowns were largely responsible for trunk movement in straight-line wind with those toward the bottom less important. Trees that are reduced or thinned in the manner described could receive less damage in windstorms.

Original languageAmerican English
Pages (from-to)20-28
Number of pages9
JournalArboriculture and Urban Forestry
Issue number1
StatePublished - Jan 2008

ASJC Scopus subject areas

  • Forestry
  • Ecology


  • Crown raising
  • Crown reduction
  • Crown thinning
  • Hurricanes
  • Tree damage


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