Category Archives: Urban trees

“Food forest” planned for Seattle

The locavore and livable cites movements have found common cause in Seattle, according to TakePart:

Seattle’s vision of an urban food oasis is going forward. A seven-acre plot of land in the city’s Beacon Hill neighborhood will be planted with hundreds of different kinds of edibles: walnut and chestnut trees; blueberry and raspberry bushes; fruit trees, including apples and pears; exotics like pineapple, yuzu citrus, guava, persimmons, honeyberries, and lingonberries; herbs; and more. All will be available for public plucking to anyone who wanders into the city’s first food forest.

“This is totally innovative, and has never been done before in a public park,” Margarett Harrison, lead landscape architect for the Beacon Food Forest project, tells TakePart. Harrison is working on construction and permit drawings now and expects to break ground this summer.

Read the rest.

New study: U.S. cities losing 4 million trees a year

Eric Jaffe, writing in the online news magazine The Atlantic Cities (a spin-off of what used to be called The Atlantic Monthly), reports on the findings of a new study in Urban Forestry & Urban Greening.

Using aerial photographs to compare changes over time in 20 major U.S. cities, researchers David Nowak and Eric Greenfield of the U.S.D.A. Forest Service found that tree coverage is on the decline, while impervious cover — roads, buildings, sidewalks, and the like — is on the rise:

Tree cover in 17 of the 20 analyzed cities had statistically significant declines in tree cover, while 16 cities had statistically significant increases in impervious cover. … City tree cover was reduced, on average, by about 0.27 percent/yr, while impervious surfaces increased at an average rate of about 0.31 percent/yr.

Nowak and Greenfield collected recent digital aerial images for at least 1,000 random points in 20 large American cities, and coupled them with images at the same points from roughly 5 years earlier. Trained photo interpreters then classified the various types of coverage at each point: tree coverage, grass coverage, building coverage, and so on.

Their subsequent analysis showed clear trends away from tree coverage and toward impervious coverage. All but three of the cities had a statistically significant loss in tree coverage, with two others showing a non-significant loss (essentially no change). Houston (3 percent) and Albuquerque (2.7 percent) suffered some of the biggest loses. Only Syracuse showed a gain in tree coverage — and that of 1 percent.

The study is behind a paywall, but do read the rest of Jaffe’s article, which includes illustrative aerial photos from the study.
(Hat-tip: Growth Rings)

Tree stamps!

Evidently in pre-digital days, landscape architects would use rubber stamps to add trees to blueprints. Tom Turner at Gardenvisit.com shares “a scan of a very high-class set of tree stamps” which, as one commenter aptly put it, looks like a box of tree chocolates. It’s almost too cool for words.

How to save trees on construction sites

A Cape Cod, Massachusetts-based tree care company called Forest Keepers maintains a blog of Tree Care Tips separate from their business site with lots of interesting posts. Their latest, “Tree preservation in Concord,” describes an all-too-common situation: three large sugar maples struggle on a new construction site. The builder wants to do the right thing but waited till rather late in the game to call an arborist, and soil compaction, damaged soil chemistry and mechanical damage have all taken a toll. What to do? Read the post to learn how the Forest Keepers responded.

Trees and cultural landscapes

It’s not a blog post, but we like this photo exhibition at Garden Design website: “Landslide: Every Tree Tells a Story.”

In 2010, The Cultural Landscape Foundation and American Photo magazine, with support from The Davey Tree Expert Company and American Forests, created an original traveling exhibition about the irreplaceable trees and tree groupings—often associated with historically important people and events—that have shaped the development of communities and cultures, many of which are at risk.

As a media sponsor of The Cultural Landscape Foundation, Garden Design is proud to share the beautiful photographs and accompanying stories that are on display in the 2010 Landslide: Every Tree Tells a Story exhibition.

Check it out. Then visit The Cultural Landscape Foundation.

Clayton Bell, guerrilla orchardist

Clayton Bell is “an environmental hydrogeologist in Houston, Texas who is obsessed with growing fruit trees,” and his blog The Bell House is the latest addition to our linkroll of blogs about trees and forests. He blogs about pomegranates, Japanese lemons, trifoliate orange trees, how to root fig cuttings, and more. His latest post, “Squat Orchard,” describes how he started a pecan plantation on a vacant lot.

I planted the trees approximately 35 feet apart along the northern edge of the lot where they should be fairly out of the way. It also looks like water from the nearby homes drains to that area, which will be big plus if we have another brutally dry summer. I placed a 3-gallon pot with the bottom cut out around each tree to protect the trunk, and marked them with orange pin flags, small t-posts with some orange flag tape, and metal tags with the variety names. I’m hoping that this will be enough to keep the mowers that come around every couple of months from cutting them down. If I can fool the mowers into thinking that those trees are supposed to be there, then the trees’ chances of survival will be that much better. I’m going to go back later and add some printed labels with an official sounding name, for a little extra insurance.

Read the rest.

Urban tree news: Pittsburgh’s master plan, San Francisco street trees on their own, and the eucalopalypse

There’s some big news about urban forestry coming out of Pittsburgh and San Francisco over the past two weeks.

  • An organization called Tree Pittsburgh is at work on that city’s first ever Urban Forest Master Plan, and is now soliciting public input. Since a majority of the city’s trees are privately owned, public buy-in will critical.
  • As of last week, San Francisco’s Department of Public Works is no longer responsible for the city’s 23,000 street trees. Their maintenance and upkeep costs are now up to local residents.
  • And also in San Francisco, the long-simmering battle over the fate of the thousands of non-native, invasive eucalyptus trees is heating up. What’s a tree-hugger to do when entire regions become taken over by trees with low value for native wildlife species?

Thanks, by the way, to Georgia Silvera Seamans at the local ecologist blog for sending these (and many other recent links) my way.

Re-envisioning a “poem forest”

Continuing with today’s theme of almost-fresh tree news from New York City, a friend sent me this link to a blog post from something called the BMW Guggenheim Lab about a poem trail through an old-growth forest in the New York Botanical Garden. I thought at first this might be hyperbole, but the Wikipedia bears it out: “Sightseers can easily spend a day admiring the serene cascade waterfall, wetlands and a 50-acre (20 ha) tract of original, old-growth New York forest, never logged, containing oaks, American beeches, cherry, birch, tulip and white ash trees — some more than two centuries old.”

Anyway, it seems that they recently finished refurbishing the trails through this tract, and asked artist Jon Cotner, the author of the piece, to “do something poetry-related on site” in conjuction with the Poetry Society of America. He wanted something that would actively engage visitors and lead them to pay closer attention to the forest around them.

So I “installed” 15 lines pulled from 2,500 years of poetry along a trail through the old-growth forest. Visitors spoke each line (printed on a handout) at specific locations (marked by small orange signs) to which the lines corresponded conceptually or physically. For example, near the start of the self-guided walk, people would recite Pythagoras’s maxim “The wind is blowing; adore the wind” to clear their heads. Or just as the Bronx River came into view, people would recite Gary Snyder’s verse “Under the trees/ under the clouds/ by the river” to grow closer to the landscape. At the final spot, above a waterfall, people said Ch’u Ch’uang’s “Waterfalls, with a sound/ Like rain” to sharpen the auditory sensation.

Walking Poem Forest took about 20 minutes. Several participants had long histories with the Garden. They felt surprised by how intimately they encountered a landscape that had seemed “familiar” or “known.” A bench near the waterfall became an informal classroom, where we discussed their experience. The overwhelming message was that the poetic lines encouraged everyone to slow down, to see and sense more clearly, to inhabit the present more deeply, and to fill with enchantment.

The post includes photos of each spot, evidently taken in November, paired with the corresponding quote. There’s also an audio compliation of visitors reading the lines. Pretty cool!

A look back at New York City trees in holiday attire

red-light treesGillian from treeaware blog visited New York City over the holidays, and has a stunning series of photos of trees decked out in lights, “turning the streets into fairyland.” She also takes a look around Central Park, and throws in a couple of photos from February 2011 when it was considerably more wintry to show the contrast. Go look.

Allen Bush, Ash Assassin

Allen Bush is a brave man and a great writer: he risked the wrath of his Louisville, Kentucky neighbors by cutting down a big white ash in his front yard, then wrote a long and thoughtful essay for the Human Flower Project about his decision.

I have a better understanding, now, of why our white ash played a vital part in a larger landscape. I created more neighborhood anxiety than could any concerns with the looming emerald ash borer (EAB). Few, if any, have thought about the “functional extinction” of ashes. The projected threat means less today than the loss of the one ash tree I took down last month. In part, that’s because there is a communal hole; much of the loss is cumulative.

It’s been a rough few years for trees in Louisville. Winds and ice have devastated the city over the last three years. The remnants of Hurricane Ike blew through in September 2008, packing winds in excess of 65 mph that knocked-out power for a week and left scattered fallen limbs and trees in its wake. Convoys of out of state electric workers pitched camp in Louisville for weeks. Local arborists were flooded. Black market tree operators arrived from as far away as Florida. They filled-in, chopped-up, took cash, paid no local or state taxes and went home a month or two later.

They were back in late January 2009. The eerie sound of trees being torn apart by a burdensome half inch of ice lasted through the night. Limbs and age-old tree trunks, strained by more weight than they could carry, came crashing to the ground. The power went-out again for a week; the debris took weeks to clean up. Indigenous, native trees including oaks, hickories, black gums and ashes generally held-up better than river birches, lacebark elms and silver maples that took a pounding. Bradford pears and southern magnolias didn’t fare much better.

The true ash assassin, of course, is the emerald ash borer, but people can be proactive in creating more diverse plantings, too. Read the rest of Bush’s post to learn his prescriptions, which blend ecological realism with public-relations savvy.

The Human Flower Project, by the way, is a fascinating multi-author site, “an international newsgroup, photo album and discussion of humankind’s relationship with the floral world. We report on art, medicine, society, history, politics, religion, and commerce,” according to their About page. Check it out.