Posts Tagged ‘INVASIVE SPECIES’

BY LYDIA LEE

The world’s first SITES-certified cemetery is designed as a successional forest.

FROM THE AUGUST 2019 ISSUE OF LANDSCAPE ARCHITECTURE MAGAZINE.

 

In the summer, the 400 grave sites in a section of West Laurel Hill Cemetery outside Philadelphia that is known as Nature’s Sanctuary are marked only by a meadow blazing with native scarlet bee balm (Monarda didyma). Memorial stones are set into a nearby wall. The area, which is designated for green burials, is the first cemetery to earn certification under the Sustainable Sites Initiative (SITES). As such, the cemetery was the subject of an ASLA webinar earlier this year, available for purchase (1.0 PDH (LA CES/HSW)/1.0 GBCI SITES-Specific CE).

To date, approximately 50 landscapes have been certified through the SITES program, which was developed jointly by the American Society of Landscape Architects, the Lady Bird Johnson Wildflower Center at the University of Texas at Austin, and the United States Botanic Garden. But Nature’s Sanctuary is the first burial ground. “The model here is assisted ecological succession, where the maintenance for the site will be carried out by nature,” says Adam Supplee, ASLA, until recently a principal at Alta Planning + Design who worked on the design. “It’s more sustainable than running a lawn mower over a grave for eternity.” (more…)

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BY ANNE RAVER

Two closely related Asian beetles are boring their way through Southern California’s trees.

FROM THE MARCH 2018 ISSUE OF LANDSCAPE ARCHITECTURE MAGAZINE.

Smaller than sesame seeds, two beetle species are spreading through Southern California, killing hundreds of thousands of trees and infecting many thousands more with a pathogenic fungus.

At first, scientists thought the pests were the same species because they look exactly alike, but they carry different pathogenic fungi, and DNA analysis revealed genetic differences. But their damage to trees is so spectacularly similar that the two beetles—the polyphagous shot hole borer and the Kuroshio shot hole borer—are now referred to collectively as the invasive shot hole borer (ISHB).

A 2017 U.S. Forest Service survey estimated that 23 million trees are vulnerable to the ISHB that is working its way through Los Angeles, Orange, Riverside, and San Bernardino Counties—or 33 percent of Southern California’s urban canopy. It’s impossible to know how many trees will die, but the projected losses are catastrophic. (more…)

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