Horticulture and Garden Operations Mini Series: Why Trees MatterPresentation Transcript
Why Trees Matter APGA Conference 2010 Bruce Cubberley Assistant Professor, Landscape Horticulture
Why Trees Matter aka the Next STEP Program Ohio State University Extension Secrest Arboretum (OARDC) Ohio DNR Urban Foresters Ohio State University researchers Private tree industry researchers Davey Tree Expert Company Rainbow TreeCare
Why Trees Matter Programs Ohio Street Tree Evaluation Program Tree Research Evaluation and Education i-Tree Case Studies Master Gardener Tree Specialization Training Greening Of The Highways (Vineland Research Station—Ontario, Canada)
Ohio Street Tree Evaluation Project Started by L.C. Chadwick in mid-60s 96 Original Sites; Now Over 140 Sites Which trees are best for our community forests The “best bang for the buck(eye)”
Emerald Ash Borer(EAB) Agrilus planipennis Family: Buprestidae A Tree Killer
Teachable Moment Invasive Species Teachable Moments United States Forest Service i-Tree Tools Environmental/Economic Impacts of Trees:
Storm Water Remediation
Increased Property Value
Why i-Tree Matters i-Tree is a software model developed by the United States Forest Service. It is a partnership between the USFS, Davey Tree Expert Company (based in Ohio), the National Arbor Day Foundation, and the International Society of Arboriculture It is a powerful research tool for determining the environmental services of trees in community forests. i-Tree programs range from complex--i-Tree Streets to analyze entire urban forests, to i-Tree Eco, a tree calculator tool that requires only tree species and diameter at breast height (dbh) to provide environmental service printouts.
i-Tree is Scale-able From regional canopy goals in the Sacramento Municipal Utility District of Seven Counties… …To a London planetree in your yard: or a yard of someone you know. Simply identify and measure the tree.
From i-Tree: treebenefits.com Trees act as mini-reservoirs, controlling runoff at the source. Trees reduce runoff by: Intercepting and holding rain on leaves, branches and bark Increasing infiltration and storage of rainwater through the tree's root system Reducing soil erosion by slowing rainfall before it strikes the soil
i-Tree: Demonstrating That Trees Pay Us Back! Street Tree Benefits in Minneapolis:
$6.8 million in energy savings
$9.1 million in reduced storm water runoff
$7.1 million increase in property value
$1 million improvements to air quality
Evaluating Plant Choice Morton Ave Orchard Grove After forty years on the Brooklyn, Ohio streets, honeylocust deliver more than eight times the environmental benefits than a similar number of Lavelle hawthorns.
Trees Count! New York City’s Street Tree Census NYC Forestry Programs
The New York City Story I Feb 1995: Fiona Watt hired as City Arborist for Parks and Recreation Parks Commissioner Henry Stern asks her to do a comprehensive inventory of NYC trees – that year! TreesCount is born: 498,470 counted Over the next 10 years: Tree budget cut 50%.
Street Tree Census Results Species Composition Changes
New York City Story II 2005: Second TreesCount Tree Inventory conducted. NYC Linked with USFS Stratum i-Tree Analysis Benefits documented: $122 million annual benefits from trees. $5.60 for every $1.00 spent Tree budget increased from $22 million to $62 million.