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The High Cost of Urban Monocultures

Tree species diversity is a critical element of ecology sustainability, the most urgent of which is to minimize the impact of pests and disease outbreaks on urban canopy cover. Anyone who has followed the introduction of Dutch Elm disease (DED) is already painfully aware of how devastating tree pest outbreaks can be. Where I live,… More

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The High Cost of Urban Monocultures

Tree species diversity is a critical element of ecology sustainability, the most urgent of which is to minimize the impact of pests and disease outbreaks on urban canopy cover. Anyone who has followed the introduction of Dutch Elm disease (DED) is already painfully aware of how devastating tree pest outbreaks can be. Where I live,… More

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How “Clean and Simple” Becomes “Dead and Gone”

Picture a schematic drawing for, say, a downtown revitalization project. You’d see bustling businesses, new bike lanes, colorful signs, and rows and rows of identical trees. As an arborist, horticulturist, and landscape architect I’ve given a great deal of thought to plant diversity over my career, and this practice of only planting a single species is… More

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The Latest Urban Tree Canopy Cover by State

For those with a mission to enhance urban forests, it is vital to have the latest statistics for urban forest or urban tree canopy coverage. In 2010, we shared a chart by Watt and Gunther highlighting the percentage of urban tree canopy (UTC) (urban forests), broken down by city in the United States. Both the… More

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Every Day is Arbor Day… Somewhere

National Arbor Day is April 24, 2020. To honor this holiday, Ellyn Shea takes us through the unexpected history of this event, and points out that the way we celebrate Arbor Day may have more to do with what’s best for politics than with what’s best for trees. – DeepRoot The first Arbor Day in… More

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Treequake: A seismic shift in San Francisco urban forestry

Starting July 1, 2017, the City of San Francisco will start doing something it hasn’t done since the 1970s: take responsibility for all the trees in the public right-of-way. San Francisco cut funding to urban forestry in the late 1970s, resulting in a handoff of responsibility to adjacent property owners for two thirds of the… More

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The History of Marker Trees

We are all searching for signs in our lives. Which way do I go on this highway? Where should I live? Where should I work? We take internet quizzes to tell us what career we should have and what kind of dog we would be and in what country we were meant to live. We look… More

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When “Parking” Meant “Space for Trees”

In April, the Landscape Architecture Foundation (LAF) and DeepRoot co-hosted a design charrette at the SvR offices in Seattle. The theme of the discussion was “Cities need nature, and nature needs cities: how and where do you struggle to bring nature to the built environment?” (We are putting together videos and blog posts based around the discussions from… More

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10 Thoughts on Texas’s Trees

What’s happening in Texas? As far as we can tell, a lot. The Lone Star state is making some huge investments in sustainable development, including green infrastructure. L. Peter MacDonagh, FASLA – who has visited the state many times over the years, and twice in the last few months to speak about using trees and soils… More

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