"This USDA website will not be updated during a lapse in federal funding. Content on this website will not be current or maintained until funding issues have been resolved. However, if there is information that affects security, life, and property, this website will continue to update that information during a funding lapse."

Skip to content. | Skip to navigation

You are here: Home Resources Library Citations Predictive Open-grown...
  
 

Predictive Open-grown Crown Width Equations for Three Oak Species Planted in a Southern Urban Locale

Reference Type
Journal, Research (Article)

Development of DBH/crown models from i-Tree Eco data on the Auburn University Campus.

"Models that predict ecosystem services in urban areas are useful tools to urban forest managers. Predictive open-grown crown width equations were developed for three oak species common in urban forests in the southern United States. Tree crown form is an important component of these equations; however, there are few predictive equations available for urban, open-grown trees. The species used were Quercus lyrata Walt. (overcup oak), Quercus nuttallii Palmer (Nuttall oak), and Quercus phellos L. (willow oak). The study authors believe that these are the first predictive open-grown crown width equations developed for these species in the southern U.S. Diameter at breast height (DBH) (independent variable), DBH2 (independent variable), and average crown width (dependent variable) data were used to create the predictive crown width equations and yielded R2 values of 0.96, 0.94, and 0.91 for overcup, Nuttall, and willow oaks, respectively. These equations can aid urban landscape and utility planners by providing a means to predict crown dimensions at varying trunk diameters. Field time could also be minimized by reducing the need to measure crown width and with time, these equations could be used to validate species specific equations (e.g., leaf biomass) for these and other southern urban-planted tree species." [Abstract]

Authors
N.A. Martin, A.H. Chappelka, E.F. Loewenstein, G.J. Keever, G. Somers
Date Published
March 2012
Journal/Conference
Arboriculture & Urban Forestry
Publisher
International Society of Arboriculture
Publisher Location
Champaign, IL (US)
Volume/Issue/Number
2
Start Page
58
End Page
63
Pages
6
Sub-Topics
Modeling (growth), Inventory (tree)
State(s)/Region(s)
Alabama
Keywords
Open-grown, Quercus, predictive crown width equations, i-Tree Eco
Indexed By
UFS-drh
Document Actions
Personal tools