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

ar," according to Andrew Liebhold, an NRS research entomologist. "Hemlock woolly adelgid currently infests about 45 percent of the range of hemlocks in the United States and 41 percent of the total hemlock basal area." These percentages are up 26 percent and 25 percent respectively since 2004.

"The analysis also showed that the general regional trend in the East over the past 50 years has been one of increasing hemlock volume, even with infestation by the hemlock woolly adelgid," according to Sonja Oswalt, an SRS forester and co-author. "Even though the insect has caused substantial negative impacts on hemlock at stand-level scales, analysis of FIA data suggests that infestations have not yet reduced the overall abundance of hemlock, even in states where hemlock woolly adelgid has been active for decades."

The authors caution that the trend of increasing hemlock volume may not last much longer. "Despite increasing hemlock volume over the last four decades across most of the eastern United States, the regions with long-established populations of hemlock woolly adelgid are also the regions where hemlock is accumulating slowest," Morin said. "Net growth rates decrease as years of infestation increase, and mortality rates increase, with mortality starting to equal net growth in areas where hemlock woolly adelgid has been present for 10 to 20 years." As time goes on the trend of increasing abundance may begin to reverse.


'/>"/>

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:12/19/2014)... Dec. 18, 2014 Research and Markets ( http://www.researchandmarkets.com/research/86ncd6/micro_market ... Monitor: North America Perimeter Security Systems Market" report to ... The North American perimeter security market is estimated to ... Although the U.S. market holds a larger share in this ...
(Date:12/17/2014)... NEW YORK , Dec. 15, 2014  HITLAB SM ... Practices (GCP) audit to confirm its adherence to current ... enables HITLAB to conduct regulated smart device and smart ... safety and research quality. "HITLAB is determined ...
(Date:12/11/2014)... Dec. 09, 2014 Research and Markets ... http://www.researchandmarkets.com/research/twhjll/biometrics_market ) has announced the addition of the ... their offering. One major trend emerging ... advances in technology, it is important to upgrade biometric ...
Breaking Biology News(10 mins):Micro Market Monitor: North America Perimeter Security Systems Market (Intrusion Detection Sensor, Video Surveillance, Communication/Alarm and Notification, Access Control System) 2Micro Market Monitor: North America Perimeter Security Systems Market (Intrusion Detection Sensor, Video Surveillance, Communication/Alarm and Notification, Access Control System) 3HITLAB Completes GCP Audit for FDA Smart Device & App Compliance 2Biometrics Market in the APAC Region 2015-2019: Key Vendors are 3M Cogent, NEC, Safran and Suprema 2
... Americans Favor Use of Biometrics in Employment,Verification Process, ... and Public Opinion Strategies today released results of ... as a tool for,stemming illegal immigration., In ... (34,percent) and preventing the hiring of illegal immigrants ...
... (February 28, 2008) -- Many of the greatest ... who imported technologies such as X rays, nuclear ... and detection techniques into the medical domain. There ... (CT) scanning, nuclear medicine, positron emission tomography (PET) ...
... Utilizing a technique that combines low temperature measurements ... others have revealed for the first time the electronic ... of the electronic properties of DNA is an important ... -- for example in the study of DNA damage ...
Cached Biology News:Poll Shows Strong Doubts About Effectiveness of Federal Employment Verification System 2The top 5 ways medical physics has changed health care 2The top 5 ways medical physics has changed health care 3The top 5 ways medical physics has changed health care 4Electronic structure of DNA revealed for 1st time by Hebrew University and collaborating researchers 2
(Date:1/22/2015)... Eckert & Ziegler Vitalea Science (EZVS), ... to the pharmaceutical and biotech industry, has announced that ... the position of Director of Science & Technology. , ... experience in drug metabolism and bioanalysis to EZVS in ...
(Date:1/22/2015)... , Jan. 22, 2015  Transwestern | RBJ today announces the ... office space for Shire a leading biopharmaceutical company, at Two ... | RBJ,s Robert Richards , president, and Brian ... for the entire five-floor building at 95 Hayden Ave. ...
(Date:1/22/2015)... Rootstown, OH (PRWEB) January 22, 2015 Crystal ... announced today that it has received AOAC-PTM Certifications for the ... O111, O121, and O145; collectively referred to as STEC or ... at 1 colony forming unit (cfu) per 325 g of ...
(Date:1/22/2015)... (PRWEB) January 22, 2015 Controlled Substance ... Alliance, which helps companies check the legal requirements around ... expand to China. , As their international operations ... globally adopting software solutions built as a result of ...
Breaking Biology Technology:Eckert & Ziegler Vitalea Science appoints Mark Seymour, PhD as Director of Science & Technology 2Eckert & Ziegler Vitalea Science appoints Mark Seymour, PhD as Director of Science & Technology 3Transwestern?RBJ Advises Shire in 202,000 SF Lease, Creating Boston's Largest Suburban Biotech Campus 2Crystal Diagnostics Awarded AOAC-PTM Accreditation for the Rapid Detection of “Big 6” E.coli Food Pathogens 2Global Compliance Service for Controlled Substances to Expand to China 2
... website of the Nobel Prize shows a cat resting ... the excitement around graphene, which, at one atom thick, ... produced. A significant obstacle to realizing graphene,s potential ... a theoretical sleeping cat. For now, material scientists stitch ...
... N.Y. Rensselaer Polytechnic Institute Professor James Jian-Qiang ... and technical achievements toward the design and realization ... professor in the Department of Electrical, Computer, and ... the prestigious William D. Ashman Achievement Award for ...
... 2010 Amgen today announced the 11 recipients of the ... Amgen Foundation, the Awards recognize staff in the United States ... the communities where the company has a presence. The Amgen ... the winning staff members, applications. "At Amgen, we ...
Cached Biology Technology:Graphene's strength lies in its defects 2Rensselaer Polytechnic Institute professor James Lu garners award for research on 3-D computer chips 2Amgen Foundation Recognizes Outstanding Staff Volunteers and Contributes $55,000 to Their Favorite Local Nonprofits 2Amgen Foundation Recognizes Outstanding Staff Volunteers and Contributes $55,000 to Their Favorite Local Nonprofits 3Amgen Foundation Recognizes Outstanding Staff Volunteers and Contributes $55,000 to Their Favorite Local Nonprofits 4
The iEMS Incubator/Shaker is a high performance microplate incubator and orbital shaker. Its superior temperature control and efficient orbital shaking reduce incubation times. -...
... Source: Pseudomonas atlantica Description: Beta-Agarase ... RNA fragments from low-melting-temperature agarose. Beta-Agarase ... disaccharides. Tested User Friendly Properties: Heat ... 30,000 Da Optimum pH: 6.5 Purity: ...
... structure called a ?cap? is present ... eukaryotic mRNAs and many viral RNAs. ... portion of the GTP present in ... in the synthesis of transcripts with ...
...
Biology Products: