International Society of Arboriculture P.O. Box 3129 Champaign, IL 61826-3129 NONPROFIT ORG U.S. POSTAGE PAID Champaign, IL PERMIT No. 328 ARBORICULTURE ARBORICULTU CONTENTS Lara A. Roman, Lindsay K. Campbell, and Rebecca C. Jordan Civic Science in Urban Forestry: Introduction to a Second Special Issue .............. 233 Richard Hallett and Tanner Hallett Citizen Science and Tree Health Assessment: How Useful Are the Data? .............. 236 Keir Hamilton, Andrew K. Koeser, and Shawn M. Landry Accuracy of Volunteer-Derived Data from a Single-Day Inventory Event Built Around a Crowdsourced Tree Mapping Application ........................................ 248 Lara A. Roman, Bailey C. Smith, Dana Dentice, Mindy Maslin, and Glen Abrams Monitoring Young Tree Survival with Citizen Scientists: The Evolving Tree Checkers Program in Philadelphia, PA .................................................................. 255 Amanda E. Sorensen, Rebecca C. Jordan, Gloria Blaise, Jeff Brown, Lindsay K. Campbell, Myla F.J. Aronson, and Michelle L. Johnson Drivers of Public Participation in Urban Restoration Stewardship Programs: Linkages Between Environmental Identity and Knowledge, and Motivations ........ 266 E. John Barker, Allison Craig, Allison Winmill, Joe Meating, and Candace Karandiuk Volunteering for Forest Health: A Public-Private Partnership in Oakville, Ontario, Canada ................................................................................................... 283 Edith de Guzman, Rachel Malarich, Lori Large, and Sharon Danoff-Burg Inspiring Resident Engagement: Identifying Street Tree Stewardship Participation Strategies in Environmental Justice Communities Using a Community-Based Social Marketing Approach .................................................................................. 291 Index ....................................................................................................................307 Conversion Chart (Metric to Imperial) ..................................................................310 & www.isa-arbor.com ISSN: 1935-5297 URBAN FORESTRY Volume 44, Issue 6, November 2018 Formerly the Journal of Arboriculture, 1975 – 2005 (Volumes 1 – 31)