Sign up & Download
Sign in

Effect of Plot and Sample Size on Timing and Precision of Urban Forest Assessments

by David J Nowak, Jeffrey T Walton, Jack C Stevens, Daniel E Crane, Robert E Hoehn
Arboriculture & Urban Forestry ()

Abstract

Accurate field data can be used to assess ecosystem services from trees and to improve urban forest management, yet little is known about the optimization of field data collection in the urban environment. Various field and Geographic Information System (GIS) tests were performed to help understand how time costs and precision of tree population estimates change with varying plot and sample sizes in urban areas using random sampling approaches. Using one-tenth acre (0.04 ha) plots, it is estimated that, on average, approximately three plots per day can be measured with plot data collected on several variables for all trees greater than 1 in (2.54 cm) in diameter along with general plot, ground cover, and shrub data. A field crew of two people can gather approximately 200 one-tenth acre (0.04 ha) plots during a 14 week summer field season depending on city traffic, city area, and tree cover conditions. These 200 plots typically yield approximately a 12% relative standard error on the total number of trees.

Cite this document (BETA)

Readership Statistics

32 Readers on Mendeley
by Discipline
 
 
 
by Academic Status
 
31% Ph.D. Student
 
22% Researcher (at a non-Academic Institution)
 
13% Post Doc
by Country
 
9% United States
 
6% United Kingdom
 
3% Sweden

Sign up today - FREE

Mendeley saves you time finding and organizing research. Learn more

  • All your research in one place
  • Add and import papers easily
  • Access it anywhere, anytime

Start using Mendeley in seconds!

Already have an account? Sign in