ARBORICULTURE ARBORICULTU & CONTENTS Forestry. Crystal A. Crown, Benjamin Z. Greer, Danielle M. Gift, and Fiona S. Watt Every Tree Counts: Reflections on NYC’s Third Volunteer Street Tree Inventory ............................49 Abstract. TreesCount! 2015 (TC2015) was the third citizen-participatory inventory of street trees in New York City, New York, U.S. Every ten years, the New York City Department of Parks & Recreation has worked with citizen scientists to record the location, size, species, and condi- tion of all public curbside trees. Volunteer street tree inventories promote awareness of the importance of the urban forest and support munici- pal urban forest management. New York City’s prior street tree inventories in 1995 and 2005 led to advances in customer service, funding for routine street tree pruning, and urban greening initiatives. TC2015 attracted 2,241 voluntary participants through multiple recruitment efforts, more than doubling involvement from 2005. Fully digital data collection improved data quality and facilitated near-real-time quality assurance of data, and advanced tree location methods increased spatial data accuracy from past inventories. Data-collection events and reward strategies were also implemented to promote volunteer engagement. Citizen scientists collected tree location data with a high-level of accuracy (96.1%) aſter minimal training. All 666,134 street trees surveyed in TC2015 populated NYC Parks’s operational forestry database, as well as a public fac- ing map (NYC Street Tree Map) for tree stewards. The following paper describes TC2015 project design and execution, outlines some of the key changes made since the first inventory in 1995, and provides results-based recommendations for practitioners planning similar projects. Key Words: Citizen Science; Civic Science; Data Quality; NYC; Street Tree Inventory. URBAN FORESTRY Volume 44, Issue 2, March 2018 Formerly the Journal of Arboriculture, 1975 – 2005 (Volumes 1 – 31) ® www.isa-arbor.com Lara A. Roman, Lindsay K. Campbell, and Rebecca C. Jordan Civic Science in Urban Forestry: An Introduction ........................................................................41 Abstract. Civic science in urban forestry is a means of engaging the public in the study, management, and care of urban trees, and includes varied approaches with different disciplinary foundations. For instance, citizen science has been gaining prominence in urban forestry, with municipalities and nonprofits engaging volunteers in data collection for inventories and monitoring. Residents can also get involved in other stages of urban forest research and management, including framing goals and questions, conducting analyses, interpreting data, and applying results. Diverse forms of public engagement have brought expanded stakeholders into the fold of knowledge production and stewardship of urban greenspaces, including co-management and civic ecology practices. As municipalities, states, nonprofits, and scientists undertake these various forms of civic science, there is a need for basic research about the nature of civic engagement in urban forestry, empirical evidence about best practices for different approaches, and the impacts of volunteering on the participants themselves. This special issue of Arboricul- ture & Urban Forestry aims to advance the scholarship of civic science in urban forestry by addressing these topics, among others, with con- tributed articles. In this introduction to the special issue, we briefly review terms related to civic science to connect these interrelated bodies of inquiry to urban forestry, and present the research studies and practitioner notes included in this special issue. We then conclude with a discussion of future research needs for civic science in urban forestry, including technological tools to enable data democratization, engag- ing marginalized and under-represented urban communities, and supporting transdisciplinary exchanges between research and practice. Key Words. Citizen Science; Civic Ecology; Co-Management; Knowledge Co-Production; Participatory Research; Urban Ecology; Urban ® ©2018 | International Society of Arboriculture | ISSN:1935-5297
March 2018
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