Navigation Links
US Forest Service study finds hemlock still abundant despite adelgid infestation
Date:9/26/2011

NEWTOWN SQUARE, Pennsylvania, September 27, 2011 An analysis of two decades of data collected by the U.S. Forest Service's Forest Inventory and Analysis (FIA) program shows that the live volume of hemlocks in the eastern United States is increasing despite infestations of hemlock woolly adelgid that have decimated local populations.

The information comes from an e-Science Update co-authored by scientists from two U.S. Forest Service research stations, the Northern Research Station (NRS) and the Southern Research Station (SRS), and published by SRS.

"The update provides an overview of the status and extent of hemlocks in the eastern United States based on FIA inventories conducted by SRS and NRS," according to Randall Morin, a research forester with the NRS' FIA program and the primary author. "It also incorporates research by NRS scientists and the results of pest surveys conducted by the Forest Service's State and Private Forestry Program."

Two native species of hemlock eastern and Carolina grow in eastern North America. Although a minor component in most of the forests of the eastern United States, high densities of eastern hemlock are found in New England and the mountains of the Southeast and Mid-Atlantic. The Carolina hemlock, similar in appearance to the eastern hemlock, is found only on rocky mountain slopes of the Southern Appalachian region.

Researchers conducted the analysis on 20 years of data collected across 433 counties stretching from southern Maine into northern Georgia. They found an overall increase in live-tree hemlock basal area in counties infested with hemlock woolly adelgid as well as those without infestations.

A tiny insect introduced into the United States from East Asia, the hemlock woolly adelgid, feeds at the base of hemlock needles, defoliating and eventually killing trees. "Since the insect was first noticed in the 1950s it has expanded its range at between 4.7 and 12.7 miles a ye
'/>"/>

Contact: Jane Hodgins
jmhodgins@fs.fed.us
651-649-5281
USDA Forest Service - Northern Research Station
Source:Eurekalert

Page: 1 2

Related biology news :

1. Lichens function as indicators of nitrogen pollution in forests
2. Tropical rainforest and mountain species may be threatened by global warming
3. Forest peoples rights key to reducing emissions from deforestation
4. When it comes to forest soil, wildfires pack 1-2 punch
5. University of Leicester professor adds new perspective to rainforest debate
6. Wake Forest plays integral role in effort to revolutionize vehicle safety
7. Diversity of trees in Ecuadors Amazon rainforest defies simple explanation
8. Earthworm activity can alter forests carbon-carrying capabilities
9. Living fossil tree contains genetic imprints of rain forests under climate change
10. Dried mushrooms slow climate warming in Northern forests
11. Wildfires result in loss of forests reserved by Northwest Forest Plan
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:8/21/2014)... published in the journal Carcinogenesis by researchers ... for the protein adenomatous polyposis coli (APC) in suppressing ... in the U.S. , Lead author Kristi Neufeld, associate ... of the Cancer Biology program at the KU Cancer ... trying to understand the various activities of APC, a ...
(Date:8/21/2014)... RUSTON, La. A team of researchers ... innovative method for using affordable, consumer-grade 3D ... implants that can contain antibacterial and chemotherapeutic ... team comprised of doctoral students and research ... nanosystems engineering programs collaborated to create filament ...
(Date:8/21/2014)... from North Carolina State University have developed a novel ... model has applications for creating new materials as well ... "Our new technique allows us to model much larger ... much more quickly," says Nan Li, lead author of ... in NC State,s Department of Materials Science and Engineering. ...
Breaking Biology News(10 mins):Research offers insight into cellular biology of colorectal cancer 2Research offers insight into cellular biology of colorectal cancer 3Louisiana Tech University researchers use 3D printers to create custom medical implants 2Louisiana Tech University researchers use 3D printers to create custom medical implants 3Researchers develop models to study polyelectrolytes, including DNA and RNA 2
... are at double the risk of having a stroke compared ... University of Alberta. It was found that the risk of ... of treatment for Type 2 diabetes and more than doubles ... entered 12,272 subjects into a Type 2 diabetes cohort. All ...
... a flooded mine in Wisconsin, scientists from several institutions ... Laboratory (Berkeley Lab) have discovered a world in which ... immobile clumps. Their finding may lead to innovative ways ... appears in the June 15, 2007 issue of the ...
... in Cairns have been cleared of carrying the dreaded Varroa ... of a serious threat to Australian honey bee populations. , ... Australian ports at least half a dozen times in the ... of the bee and because the latest incursion had lain ...
Cached Biology News:In nature, proteins sweep up nanoparticles 2In nature, proteins sweep up nanoparticles 3In nature, proteins sweep up nanoparticles 4Warning from Asian bees 2
(Date:8/21/2014)... NEW YORK , Aug. 21, 2014 /PRNewswire/ ... OTCM) congratulates Immune Pharmaceuticals Inc., a biotechnology company, ... Capital Market.  Immune previously traded on OTCQX®, the ... operated by OTC Markets Group. Logo - ... Immune Pharmaceuticals on the successful execution of its ...
(Date:8/21/2014)... St. Louis, MO (PRWEB) August 21, 2014 ... premier, full service biopharmaceutical contract development and manufacturing ... selected by Progenics Pharmaceuticals, Inc., an oncology company ... targeting and treating cancer, to manufacture the anti-prostate ... Progenics’ PSMA ADC product candidate. Under the ...
(Date:8/20/2014)... that American Indians largely were wiped out by diseases ... brought to the New World by European explorers., One ... lived in the Americas shortly before Europeans arrived, and ... diseases., But new research led by anthropological geneticists Anne ... the University of Tubingen in Germany indicates the diagnosis ...
(Date:8/20/2014)... 20, 2014  PAREXEL International Corporation (NASDAQ: ... at the Baird Healthcare Conference in New York.  ... Officer, will be making a presentation on PAREXEL and ... Sept. 3, 2014. A live webcast of ... of PAREXEL,s website at www.PAREXEL.com in the ...
Breaking Biology Technology:OTC Markets Group Congratulates Immune Pharmaceuticals on NASDAQ Listing 2Gallus Enters Agreement with Progenics Pharmaceuticals, Inc. for Manufacture of Anti-PSMA Monoclonal Antibody 2Gallus Enters Agreement with Progenics Pharmaceuticals, Inc. for Manufacture of Anti-PSMA Monoclonal Antibody 3Unusual discovery leads to fascinating tuberculosis theory 2Unusual discovery leads to fascinating tuberculosis theory 3PAREXEL International To Present At Baird Healthcare Conference 2
... Mo., Jan. 17, 2012 Reliv International, Inc. (NASDAQ: ... creation of LunaRich™, an exclusive soy powder developed at the ... one of its nutritional supplements and will reveal that product ... "Biotechnology is vital to Missouri,s economic future," ...
... commitment to expand its business model in the Pacific Rim ... imaging and cardiac safety core labs in the ... an office in Tokyo, Japan under the wholly owned subsidiary ... to announce the creation of our new subsidiary in Asia ...
... Zyga Technology, Inc. announced today that Jim Bullock ... of the company.  Before joining Zyga Technology, Jim was ... sold to Boston Scientific.  Prior to Atritech, Jim was ... acquired by St. Jude Medical.  (Logo: ...
Cached Biology Technology:Reliv and Soy Labs Launch LunaRich, a Healthier Soy 2Reliv and Soy Labs Launch LunaRich, a Healthier Soy 3Reliv and Soy Labs Launch LunaRich, a Healthier Soy 4CoreLab Partners Opens Office in Tokyo, Japan 2Zyga Technology, Inc. Announces the Appointment of Jim Bullock as President and CEO 2
No-Weigh Dithiothreitol (DTT) ,7.7 mg DTT/Tube x 48 tubes...
... is described by end-users to be "a ... fundamentals of light microscopy and electronic imaging. ... it does not require much space and ... lab environment. The DM-BA300 combines Motic's own ...
... range of ergonomic microscopes are now available ... footprint. The DM-BA200 comes packed with Motic's ... exchangeable USB2.0 plug and play digital image ... mounted on a reversed quadruple nosepiece, deliver ...
This kit is designed to select cells labeled with biotinylated antibodies. Kit includes reagents for labeling 3 x 10 9 cells and EasySep magnet....
Biology Products: