Trees in the City
Urban Forest Research Community Resources
Trees in the City is a community of urban forest researchers. It is also the name of annual sessions at the American Association of Geographers annual meeting, and an annual virtual workshop held during the fall.
Announcements
- The next Virtual Trees in the City Symposium will be held October 5-6, 2026. The virtual event is always free. Join the email group to receive the call for papers announcement in summer 2026.
- The 18th annual Trees in the City at AAG 2027 will take place February 8-12 in New York City.
Join the email group to receive the call for papers in September 2026.
- We also anticipate a field trip to learn about NYC urban forest issues.
Join the Trees in the City Email Group
The URBAN FOREST email group was created during the Trees in the City paper sessions of the annual AAG conference. The purpose of the email group is to facilitate discussion on theoretical and applied urban forest research. Specifically, the forum is meant to share the following type of content:
- Share announcements about new papers, conferences/workshops and events.
- Make connections with potential research collaborators.
- Distribute graduate student and post-doc opportunities.
- Discuss theoretical questions.
- Share opinions about contemporary urban forest issues.
To join the email group, simply send an email to Shawn Landry at USF: Landry@usf.edu.
Recorded Videos from AAG Trees in the City Sessions
During recent years, we have attempted to record as many presentation and panel sessions as possible. The following is a list of sessions/presentations that we have been able to record.
2026 AAG Trees in the City Sessions
Session 1
- Kirsten Schwarz, Cultivating Canopies: Understanding Who Designs, Plants, and Maintains Schoolyard Tree Projects in California
- Consolata Macharia, Green infrastructure governance in U.S. cities
- Jess Vogt, Haphazard EAB treatment of parkway ash trees in Chicago: What's the loss of ecosystem services?
- Michael Alonzo, Monitoring the neighborhood air cooling effect of forest patches using bike-mounted thermometers
- Xiaoyue Li, Quantifying the Cooling Potential of Five Urban Tree Species in Hot-Humid Summers
Session 2
- El Newnam, Tree Canopy, Tree Height, and Heat Vulnerability in 13 Mid-Sized Pennsylvania Cities
- Matt Bowery, Perceptions of Climate Change and Engagement with Urban Trees: Insights from Toronto and Mississauga, Ontario
- Alessandro Ossola, Urban Fire Geography - Advancing a New Discipline for Research and Community Resilience
- Patrick Hurley, Useful Trees in Cities: A Global Analysis of Provisioning Services
- Luisa Velasquez, Evaluating the Role of Trees in Regulating Schoolyard Temperatures Across California
Session 3
- Donovan Landry, Cooling Effects of a Miyawaki Forest During an Extreme Heat Event
- Robert Moore, Urban Tree Growth Dynamics Across Three Massachusetts Cities
- Natalie Van Doorn, Flammability of Common Urban Tree Species in California: Insights from Cone Calorimetry
- Adam Berland, Trees in the City at 16: Urban Forestry Research Themes and Progress from 2010-2025
Session 4
Session 5
- Hill Nystrom, What and Where Are We Losing? Assessing Tree Removals' Spatial Patterns of Species and Function
- Shawn Landry, Post-Hurricane Changes to Tree Canopy and Resident's Relationships with Trees
- Aidan Caron, Analyzing Trends in Urban Tree Survival with 'treetrackr' for R: A Massachusetts Case Study
- Gisselle Mejía, Socio-ecological patterns of urban tree health in Detroit, Michigan
- Tara Trammell, Urban forests move over time: analysis of forest canopy cover through historical aerial imagery
Session 6
- Aline Kuzma, Incentive-based Policy for Tree Protection: A National Review
- Jennifer Atchison, Tree and forest maintenance: arboricultures for liveable urban worlds.
- Julius Addai, Where Best Laid Plans Get Waylaid: Assessing The Green Infrastructure Planning Implementation Gap In US Cities
- Sara Meerow, Green infrastructure governance, goals, and gaps in U.S. and German cities
- Luke Beattie, Seeing the Urban Forest Through Its Private Trees: Why Are Residents Motivated to Plant and Remove Trees?
Session 7
- Alicia Coleman, Urban Tree Committees: Describing Past, Present, and Future Regional Trend
- Tenley Conway, Where to equitably plant urban trees? Participatory mapping in marginalized communities
- Greg King, A Shifting Urban Forest: Tracking Change in a Comprehensive Public and Private Tree Inventory
- Alexander Martin, Professional governance of arboriculture and urban forestry in Canada: a comparative policy approach
2025 AAG Trees in the City Sessions (partial)
Session 1
- Jeff Rose, Homelessness and environmental justice: Using tree shade to mitigate extreme urban heat
- Jess Vogt, Urban forests as socio-ecological systems: A comprehensive framework and research agenda
- Nancy Sonti, Whose woods are these? Forest patch characteristics and ownership across cities of the eastern United States
- Tara Trammell, Oak assisted migration in urban forest: Model systems for climate adaptation research
Session 3
- Adam Berland, Soil access is an equity issue for urban forestry and nature-based solutions to climate change
- Alex Martin, Mapping street tree diversity in Canada's urban forests
- Andrés Peñalosa Reyna, Bosque Urbano de las Californias: A transnational urban forest in mediterranean North America
- Matthew Fry, The digitization of urban forests
- Rusal Ferus, Inconsistencies with public and private data for effective urban forest management
Session 4
- Anna Bierbrauer, Trees as archive: A novel method for assessing tree longevity in 20th C Denver, CO
- Marc Healy, Multi-decadal, residential front and back yard tree canopy cover change: A case study of Holyoke, MA
- Sydney Bosley, Evaluating Our Roots Chicago, an equity-based tree-planting program: Survival and condition of recently planted trees
- YunJae Ock, Tree size matters for cooling the public right-of-way: An empirical assessment of mid-latitude US cities
- Myles Ritchie, Determining the public's perceptions of urban trees: A case study from O'ahu, Hawai'i
Session 5
- David Miller, Classifying urban tree species in New York City using remote sensing to reduce heat-related health impacts
- Jonathan Pando Ocón, From the urban forest to random forest: Leveraging aerial remote sensing imagery for tree species identification in Los Angeles County
- Michael Agbozo, Integrated cellular automata and deep learning for environmental assessment and tree inventorying for the City of Auburn, AL
- Nick Geron, Evaluating street tree species' health and impact on LST using UAVs and field methods
- Dexter Locke, Cross-site analyses of the urban national landowner survey (UNLS)
Session 6
- Adlai Nelson, Factors influencing establishment and post-establishment residential yard tree survivorship in Worcester, Massachusetts
- Nick Barba, Particulate matters: Inter- and intra-urban variability in particulate matter deposition to urban trees across three US cities
- Tenley Conway, Growing the urban forest through a backyard tree planting program: An analysis of 25 years of tree retention and removal
- Zia Salim, Residential perceptions of the urban forest: A case study in suburban Southern California
- Shawn Landry, Challenges to a tree planting initiative in the aftermath of two major hurricanes
2021 AAG Trees in the City Sessions
Session 1
- Lara Roman, The rise and fall of the London planetree in Philadelphia: Legacies of past decision-making in urban forestry
- Greg King, Effects of residential development on growth, climatic drivers, and resilience of mature trees
- Marc Healy, Characterizing historical urban canopy cover through a manual interpretation methodology
- Natalie Van Doorn, Urban forest changes and their drivers in the Sacramento Region, CA
- David Miller, Annual changes in urban tree and turfgrass cover during a long-term drought in Los Angeles
Session 2
- Shawn Landry, Urban Tree Cover, Vegetation Diversity, and Asthma: Evidence from 500 Cities
- Daniel Sax, Improvement, not Displacement: Clarifying relationships between urban greening and green gentrification
- Erin Hardman, Urban forest equity: Distribution of edible trees in Bloomington and Indianapolis, Indiana
- Andrew Millward, Trees Are Good, But Better for Some: Environmental Justice and Urban Forest Management
- Bhuwan Thapa, Race, income, and urban forest quality: Environmental justice in Indiana
Session 3
- Patrick Hurley, Assessing access to culturally significant species in New York City's urban forest
- Lorien Nesbitt, Intercultural exchange and biocultural diversity in Vancouver's urban forests
- Douglas Shoemaker, A story in four maps: How spatial analytics shape canopy goals in Charlotte
- Rinku Roy Chowdhury, Socioeconomic and institutional drivers of urban vegetation patterns
- Adam Berland, Property parcel characteristics and urban vegetation patterns
Session 4
- Camilo Ordóñez, Public perceptions of urban forests: A systematic review
- Janina Kowalski, Life, Death & Weeding: The co-creation of urban food tree ecologies
- Corinne Bassett, The urban forest management action framework
- Nicholas Geron, Watered down stewardship and juvenile tree survivorship
- Annie Yuan, Urban residents' socio-ecological value of living green infrastructure
2020 AAG Trees in the City Sessions
Session 1
- Janina Kowalski, Where the fruit falls: The governance of urban food trees
- Lara Roman, Moving beyond “trees are good”: Disservices and costs of urban forests
- David Miller, Effects of severe multiyear drought on urban trees using airborne spectroscopy
- Amber Grant, Environmental justice and community tree-planting practices in Philadelphia
- Vivek Shandas, The effects of redlining on current-day access to urban nature
Session 2
Recorded Videos from Virtual Trees in the City Sessions
2024 Virtual Trees in the City
Day 1, Session 1
- Ashlynn Fleming, How spatial context affects our view of trees: The role of social and environmental factors in shaping urban forest perceptions
- Rebecca Hargrave, How population size, affluence, and metropolitan proximity influence urban forestry management
- Mike Alonzo, Literature review on trees and cooling for ISA
- Nicholas Geron, Assessing health and impact of street trees using UAVs and field methods in Worcester, MA
Day 1, Session 2
- Alex Martin, 200 years of urban forest threats: Issues, tradeoffs, and opportunities
- Matt Fry, The institutionalization of shade trees in cities
- Candace Powning, Resident perspectives on Toronto-induced canopy loss and regrowth in Springfield, MA
Day 2, Session 1
- Andrés Peñalosa Reyna, Bosque Urbano de las Californias: Tree selection in Mediterranean North America
- Olivia Keenan, Tree practitioner perspectives on species selection for heat-related health
- Zia Salim, Residents' perceptions of the urban forest in Southern California
- Chen Wang, Quantifying climate and hydrology effects of urban forests in Nashville, TN
Day 2, Session 2
- Xiaoyue Li, More trees, cooler cities? Cooling effects of urban forests in parking lots
- Diksha Tamarg, Effects of urban soil management on soil properties and tree growth
- Alexandra Ponette-Gonzalez, From canopy to ground: Elemental carbon storage in urban soils
- Talon Roberts, Assessing urban tree health and mortality using Google Street View
2023 Virtual Trees in the City
Session 1
- Marc Healy, Multi-decadal residential tree canopy change in Holyoke, Massachusetts
- Bhuwan Thapa, Characterizing urban tree species with hyperspectral imagery
- Andrew Koeser, Comparing existing and desired urban forest access in Florida
- Alex Martin, Invasive urban forest pests and canopy inequality
Session 2
- Candace Powning, Qualitative inquiry methods in urban forestry research
- Asha-Lé Davis & Jehane Samaha, Community-powered tree monitoring and stewardship
- Elizabeth Riedman, Volunteer leadership in community-led urban tree planting
- Lindsay Darling, Social barriers and benefits of equitable tree planting
- Anita Morzillo, Managing urban forest patches for climate change adaptation
Session 3
2022 Virtual Trees in the City
Day 1, Session 1
- Mike Alonzo, Urban tree response to heat using UAV canopy temperature measurements
- Thy Ya Kyaw, Spectral responses of community urban tree species
- Ryan Klein, Comparing tree risk assessment methods
- Drew Powell, Race, forest patches, and heavy metal pollution in Baltimore
Day 1, Session 2
- Yujuan Chen, Trees and soils in the city: Healthy soils for healthy communities
- Maya Hall, Urban tree phenology using volunteer-hosted phenocams
- Lara Roman, High tree turnover on an urban college campus
- Jackson Lyall, Socioeconomic drivers of canopy equity in Chicago
Day 2, Session 1
- Lindsay Campbell, Not by trees alone: Catering community in urban forestry
- Hugo Rochard, Urban micro-forests as socio-ecological innovations
- Nick Geron, Tree planning challenges and community engagement
- Anita Morzillo, Roadside forest management for multiple stressors
Day 2, Session 2
- Danielle Tanzer, Identifying plantable area in Connecticut for tree planting
- Maya Rodríguez, Addressing socio-environmental marginalization through tree planting
- Fang Fang, “Just green is not enough”: Evaluating urban street trees in Washington, D.C.
- Levon Bigelow, Longitudinal community analysis of Philadelphia's street trees (2015–2021)
For more information about Trees in the City, contact:
- Tenley M. Conway, University of Toronto, Mississauga, tenley.conway@utoronto.ca
- Shawn Landry, University of South Florida, landry@usf.edu