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:4/23/2014)... shows that male black widow spiders prefer their female ... of mate preference by male spiders. , ... Maydianne Andrade, a professor in UTSC,s Department of Biological ... wild that males overwhelmingly chose to mate with well-fed, ... tell whether a potential mate is well-fed and unmated ...
(Date:4/23/2014)... Scientists have conclusive evidence that the source of a ... Ocean and called the "bio-duck," is the Antarctic minke ... by submarine personnel in the 1960s who thought it ... recorded at various locations in the Southern Ocean, but ... In February 2013, an international team of researchers deployed ...
(Date:4/23/2014)... group decision increases with the abundance of brains involved ... variety of factors as often happens in life ... groups actually tend to make more accurate decisions while ... pieces of information. , The findings present a significant ... the "wisdom of crowds," wherein individual observations even ...
Breaking Biology News(10 mins):Picky male black widow spiders prefer well-fed virgins 2Scientists identify source of mysterious sound in the Southern Ocean 2Scientists identify source of mysterious sound in the Southern Ocean 3Too many chefs: Smaller groups exhibit more accurate decision-making 2Too many chefs: Smaller groups exhibit more accurate decision-making 3
... herders are facing the challenges of adapting to climate ... for herds to find food and navigate. To help ... them with satellite-based snow maps. "Snow is of ... whether reindeer are able to access the pastures that ...
... ANN ARBOR, Mich. Head and neck cancer patients who ... they were diagnosed had worse survival outcomes than those with ... University of Michigan Comprehensive Cancer Center. "While there has ... be linked to cancer survival, the health habits a person ...
... report finds that man-made toxic chemicals used as flame retardants in consumer products are found in all US coastal ... Click here for more information. , ... , , , ... , , , , ...
Cached Biology News:Satellite snow maps help reindeer herders adapt to a changing Arctic 2Health choices predict cancer survival, U-M study finds 2NOAA report calls flame retardants concern to US coastal ecosystems 2NOAA report calls flame retardants concern to US coastal ecosystems 3NOAA report calls flame retardants concern to US coastal ecosystems 4
(Date:1/15/2014)... and SAN JOSE, California , ... biotechnology company developing antibody-drug conjugates for cancer, today announced the ... of Directors. Dr Reynolds has over 20 years, development experience ... Officer at Seattle Genetics. "I am delighted to ...
(Date:1/15/2014)... Two champions of science, technology, engineering, and ... annual competition for middle and high school students designed ... study. The competition presents students with real-world problems experienced ... Mathematics, and Sciences is a program administered by ...
(Date:1/15/2014)... AudioNotch is the internet's leading provider ... treatment of tinnitus. Patients listen to sound therapy that ... period of weeks to months, their tinnitus volume decreases. , ... Notched Music and Notched White Noise. Now, AudioNotch is pleased ...
(Date:1/14/2014)... 14, 2014  3D Communications, a leading provider of strategic communications services ... media events in the United States and ... Virginia Cox , JD, is returning to the firm,s ... re-joins 3D after more than two years of service as Associate ...
Breaking Biology Technology:Oxford BioTherapeutics Appoints Thomas C Reynolds MD, PhD to its Board of Directors 2Oxford BioTherapeutics Appoints Thomas C Reynolds MD, PhD to its Board of Directors 3Technology Student Association Partners with Leaders in STEM Education Advocacy for Annual Competition 2Technology Student Association Partners with Leaders in STEM Education Advocacy for Annual Competition 3Technology Student Association Partners with Leaders in STEM Education Advocacy for Annual Competition 4Technology Student Association Partners with Leaders in STEM Education Advocacy for Annual Competition 5Former FDA Associate Commissioner Returns To 3D Communications 2
... investment in science and technology, as well expand ... third Office of Naval Research (ONR)-sponsored International Lecture ... headquarters. "The Arrival of Brazil" lecture featured ... Warfare Center, Carderock; Dr. Eugenius Kaszkurewicz, director of ...
... Oct. 22 Shrink Nanotechnologies, Inc. ("Shrink") (OTC ... nanotechnology company developing products and licensing opportunities in ... and biotechnology research and development tools businesses, announced ... to produce a high content screening tool for ...
... Encorium Group, Inc. (Nasdaq:  ENCO), (the "Company"), ... conducting studies in over 30 countries for many ... today announced that, on October 20, 2010, it ... (the "Panel") has determined to delist the Company,s ...
Cached Biology Technology:ONR lecture focuses on Brazil's growth in global science and technology 2Shrink Nanotechnologies Enters Into Agreement to Produce High Content Screening Software Called 'Stemage' for its StemDisc Stem Cell Culturing Products 2Shrink Nanotechnologies Enters Into Agreement to Produce High Content Screening Software Called 'Stemage' for its StemDisc Stem Cell Culturing Products 3Shrink Nanotechnologies Enters Into Agreement to Produce High Content Screening Software Called 'Stemage' for its StemDisc Stem Cell Culturing Products 4Shrink Nanotechnologies Enters Into Agreement to Produce High Content Screening Software Called 'Stemage' for its StemDisc Stem Cell Culturing Products 5Encorium Announces NASDAQ Panel Decision to Delist Common Stock; Announces Changes to its Board of Directors 2Encorium Announces NASDAQ Panel Decision to Delist Common Stock; Announces Changes to its Board of Directors 3Encorium Announces NASDAQ Panel Decision to Delist Common Stock; Announces Changes to its Board of Directors 4
Features , Designed to assist users in applying domed caps to tube strips and plates , Minimises the pressure required to seal the caps effectively , Enables multiple tubes to be sealed simultaneousl...
Request Info...
Sterile, individually wrapped, 4mm Cuvettes...
versican (H-56)...
Biology Products: