Forest Science and Health

Fires Test Performance of Tall Wood Buildings

Wood buildings provide an array of economic and environmental benefits, and interest in capitalizing on those benefits by constructing mid- to high-rise buildings using cross-laminated timber (CLT) is growing.

CLT is made from layers of dried lumber boards stacked in alternating direction at 90-degree angles, glued and pressed to form solid panels. These panels have exceptional strength and stability and can be used as walls, roofs, and floors. Additionally, calculations have shown that a seven-inch floor made of CLT has a fire resistance of two hours.

Tree mortality in Lake Tahoe’s forests has increased drastically

Lake Tahoe’s famously clear waters continue to warm, and the surrounding forests face dire threats due to drought, disease and insects, according to the annual Tahoe State of the Lake report by researchers at UC Davis.

The second deepest lake in the United States after Crater Lake, Lake Tahoe has warmed by half a degree Fahrenheit each year for the past four years — 14 times faster than the historic rate, the report said.

Washington, DC Launches New Tree Watering App

Young street trees with watering bags are thankfully a frequent site in Washington, DC.

During the last tree planting season in our nation's capital (October 2016 through April 2017), the city planted 8,200 trees, increasing urban tree canopy coverage of the District to 38 percent.

Overall, the District maintains more than 215,000 trees throughout the city. Therefore, it is understandable that during these periods of intense heat the District may not be able to water every.tree.every.day.

Forester: Bark Beetles Getting Worse in Idaho

Bark beetle problems continue to worsen on Northern Idaho forest lands, a university forester says.

Drought stress from several years ago has led to the increased pressure now, said Chris Schnepf, University of Idaho Extension forester in Coeur d’Alene, Idaho.

Western pine beetles, pine engraver beetles, fir engraver beetles and Douglas fir beetles all are more active this year, he said.

“All of these bark beetles are native insects, they’re always around at some endemic level,” he said. “But when you have stand conditions that favor them, they start to take off.”

Invasive emerald ash borer gets closer to South Dakota

Ash trees in South Dakota are on the cusp of endangerment.

The emerald ash borer (EAB), a green beetle that feasts on the vascular tissue of ash trees, has been expanding from its original discovery in Detroit, Mich. It has killed hundreds of millions of trees in the United States in the past decade, expanding from the Great Lakes region in 1990 to 25 states today, including Iowa, Minnesota and Nebraska.

NASF, AFF Applaud Introduction of Empowering State Forestry to Improve Forest Health Act of 2017

Bipartisan Bill to Prioritize Forest Landscape-Scale Projects Across Both Private and Public Land

WASHINGTON—This week Senator Steve Daines (R-MT) and Senator Amy Klobuchar (D-MN) introduced the Empowering State Forestry to Improve Forest Health Act of 2017. This bipartisan legislation would direct funding toward the highest priority projects, resulting in measurable improvements to non-federal private forests and nearby National Forest System lands. 

Drought, Bark Beetles Weaken California's Trees

California has more than 100 million dead trees in its forests, and there is no consensus on their impact on the environment or how to deal with them.
In November, the U.S. Forest Service said an aerial survey revealed that 36 million additional trees had died in the midst of a multi-year drought, bringing the total since 2010 to more than 102 million.

The tree deaths have been concentrated in the southern and central Sierra Nevada, but experts warn of increasing deaths in forests all the way up to the Oregon border.

Webinar: Forest Management for Wildlife

The increasing emphasis on multiple-use forests can be a challenge for landowners and land managers. 

During a webinar scheduled for February 15,  Mark McConnell with the University of Georgia, D.B. Warnell School of Forestry and Natural Resources will discuss strategies to increase wildlife populations and habitat while maintaining a productive, healthy forest stand. 

Topics covered will include preferred tree species for wildlife, stand structure, and different management strategies for various wildlife species, especially in the southeastern United States.