Skip to main content

Main menu

  • Home
  • Content
    • Ahead of Print
    • Current Issue
    • Special Issues
    • All Issues
  • Contribute
    • Submit to AUF
    • Author Guidelines
    • Reviewer Guidelines
  • About
    • Overview
    • Editorial Board
    • Journal Metrics
    • International Society of Arboriculture
  • More
    • Contact
    • Feedback
  • Alerts

User menu

  • Log in

Search

  • Advanced search
Arboriculture & Urban Forestry
  • Log in
Arboriculture & Urban Forestry

Advanced Search

  • Home
  • Content
    • Ahead of Print
    • Current Issue
    • Special Issues
    • All Issues
  • Contribute
    • Submit to AUF
    • Author Guidelines
    • Reviewer Guidelines
  • About
    • Overview
    • Editorial Board
    • Journal Metrics
    • International Society of Arboriculture
  • More
    • Contact
    • Feedback
  • Alerts
  • Facebook
  • Twitter
  • YouTube
  • LinkedIn
Research ArticleArticles

Evaluating the Reproducibility of Tree Risk Assessment Ratings Across Commonly Used Methods

Ryan W. Klein, Andrew K. Koeser, Larsen McBride, Richard J. Hauer, Laura A. Warner, E. Thomas Smiley, Michael A. Munroe and Chris Harchick
Arboriculture & Urban Forestry (AUF) November 2023, 49 (6) 271-282; DOI: https://doi.org/10.48044/jauf.2023.019
Ryan W. Klein
Department of Environmental Horticulture, University of Florida, Fifield Hall, P.O. Box 110670, Gainesville, FL, USA
  • Find this author on Google Scholar
  • Search for this author on this site
Andrew K. Koeser
Department of Environmental Horticulture, University of Florida, Gulf Coast Research and Education Center, 14625 County Road 672, Wimauma, FL, USA
  • Find this author on Google Scholar
  • Search for this author on this site
Larsen McBride
Department of Environmental Horticulture, University of Florida, Fifield Hall, P.O. Box 110670, Gainesville, FL, USA
  • Find this author on Google Scholar
  • Search for this author on this site
Richard J. Hauer
College of Natural Resources–Forestry, University of Wisconsin–Stevens Point, 800 Reserve Street, Stevens Point, Wisconsin, USA, Urban Forestry Research & Development, CNUC, 5930 Grand Ave, West Des Moines, IA, USA
  • Find this author on Google Scholar
  • Search for this author on this site
Laura A. Warner
Department of Agricultural Education and Communication, University of Florida, 407 Rolfs Hall, P.O. Box 110540, Gainesville, FL, USA
  • Find this author on Google Scholar
  • Search for this author on this site
E. Thomas Smiley
Bartlett Tree Research Laboratory, F.A. Bartlett Tree Expert Company, 13768 Hamilton Road, Charlotte, NC, USA
  • Find this author on Google Scholar
  • Search for this author on this site
Michael A. Munroe
College of Journalism and Communications, University of Florida, Weimer Hall, 1885 Stadium Road, Gainesville, FL, USA
  • Find this author on Google Scholar
  • Search for this author on this site
Chris Harchick
Department of Environmental Horticulture, University of Florida, Fifield Hall, P.O. Box 110670, Gainesville, FL, USA
  • Find this author on Google Scholar
  • Search for this author on this site
  • Article
  • Figures & Data
  • Info & Metrics
  • References
  • PDF
Loading

Article Figures & Data

Figures

  • Tables
  • Figure 1.
    • Download figure
    • Open in new tab
    • Download powerpoint
    Figure 1.

    Comparison of ratings submitted by ISA Certified Arborist® (CA) participants with the International Society of Arboriculture Tree Risk Assessment Qualification (TRAQ) and an ISA BMP group. Each respondent assessed 3 trees (n = 82 assessments for TRAQ and n = 32 assessments for ISA BMP).

  • Figure 2.
    • Download figure
    • Open in new tab
    • Download powerpoint
    Figure 2.

    Differences in mitigation strategies recommended by respondents with Quantified Tree Risk Assessment training (QTRA; n = 21), respondents with International Society of Arboriculture Tree Risk Assessment Qualification training (TRAQ; n = 28), and respondents lacking either training (ISA BMP, n = 11). Each participant assessed 3 trees and was permitted to recommend more than 1 strategy per tree. As such, percentages represent a total of 74, 119, and 38 mitigation recommendations for QTRA, TRAQ, and ISA BMP, respectively.

  • Figure 3.
    • Download figure
    • Open in new tab
    • Download powerpoint
    Figure 3.

    Box and whisker plots depicting the variability of likelihood of failure ratings made using 1-year and 3-year timeframes. A likelihood of failure rating of 1 = improbable, 2 = possible, 3 = probable, and 4 = imminent. The bolded numbers represent median values. The green boxes represent the interquartile range of the ratings. The whiskers represent the minimum and maximum recorded values. Based on 117 assessments from 39 participants.

Tables

  • Figures
    • View popup
    Table 1.

    Respondent demographics for participants (n = 60) with Quantified Tree Risk Assessment (QTRA) training, Certified Arborists® with the International Society of Arboriculture (ISA) Tree Risk Assessment Qualification (TRAQ), and untrained respondents using the ISA Tree Risk Assessment BMP (ISA BMP) system.

    CharacteristicsQTRATRAQISA BMP
    Participants (n)212811
    Percent (%) male10092.9100
    Average age (yrs)51.854.258.2
    Percent (%) parent85.092.980
    Percent (%) homeowner90.585.7100
    Percent (%) college graduate28.667.863.6
    Percent (%) advanced degree42.917.927.3
    Percent (%) ISA Certified Arborist082.127.3
    Percent (%) ISA BCMA™4.717.90
    Percent (%) perform risk assessmentsZ10085.754.5
    Median risk assessments annually50025100
    • ↵Z The percent of respondents who perform risk assessments as part of their work.

PreviousNext
Back to top

In this issue

Arboriculture & Urban Forestry (AUF): 49 (6)
Arboriculture & Urban Forestry (AUF)
Vol. 49, Issue 6
November 2023
  • Table of Contents
  • Table of Contents (PDF)
  • Index by author
Print
Download PDF
Email Article

Thank you for your interest in spreading the word on Arboriculture & Urban Forestry.

NOTE: We only request your email address so that the person you are recommending the page to knows that you wanted them to see it, and that it is not junk mail. We do not capture any email address.

Enter multiple addresses on separate lines or separate them with commas.
Evaluating the Reproducibility of Tree Risk Assessment Ratings Across Commonly Used Methods
(Your Name) has sent you a message from Arboriculture & Urban Forestry
(Your Name) thought you would like to see the Arboriculture & Urban Forestry web site.
Citation Tools
Evaluating the Reproducibility of Tree Risk Assessment Ratings Across Commonly Used Methods
Ryan W. Klein, Andrew K. Koeser, Larsen McBride, Richard J. Hauer, Laura A. Warner, E. Thomas Smiley, Michael A. Munroe, Chris Harchick
Arboriculture & Urban Forestry (AUF) Nov 2023, 49 (6) 271-282; DOI: 10.48044/jauf.2023.019

Citation Manager Formats

  • BibTeX
  • Bookends
  • EasyBib
  • EndNote (tagged)
  • EndNote 8 (xml)
  • Medlars
  • Mendeley
  • Papers
  • RefWorks Tagged
  • Ref Manager
  • RIS
  • Zotero
Share
Evaluating the Reproducibility of Tree Risk Assessment Ratings Across Commonly Used Methods
Ryan W. Klein, Andrew K. Koeser, Larsen McBride, Richard J. Hauer, Laura A. Warner, E. Thomas Smiley, Michael A. Munroe, Chris Harchick
Arboriculture & Urban Forestry (AUF) Nov 2023, 49 (6) 271-282; DOI: 10.48044/jauf.2023.019
del.icio.us logo Twitter logo Facebook logo Mendeley logo
  • Tweet Widget
  • Facebook Like
  • Google Plus One
Bookmark this article

Jump to section

  • Article
    • Abstract
    • Introduction
    • Methods
    • Results
    • Discussion
    • Conclusion
    • Conflicts of Interest
    • Acknowledgements
    • Literature Cited
  • Figures & Data
  • Info & Metrics
  • References
  • PDF

Related Articles

  • No related articles found.
  • Google Scholar

Cited By...

  • No citing articles found.
  • Google Scholar

More in this TOC Section

  • Contribution of Urban Trees to Ecosystem Services in Lisbon: A Comparative Study Between Gardens and Street Trees
  • Unmanned Aerial Vehicle (UAV) in Tree Risk Assessment (TRA): A Systematic Review
  • Thiabendazole as a Therapeutic Root Flare Injection for Beech Leaf Disease Management
Show more Articles

Similar Articles

Keywords

  • Hazard Tree
  • Likelihood of Failure
  • Professional Judgement
  • Risk Management
  • Risk Perception
  • Tree Safety
  • Urban Forestry

© 2025 International Society of Arboriculture

Powered by HighWire