Navigation Links
Tree deaths have doubled across the western US
Date:1/22/2009

Tree death rates have more than doubled over the last few decades in old-growth forests of the western United States, and the most probable cause of the worrisome trend is regional warming, according to a U.S. Geological Survey-led (USGS) study published in Science on January 23.

The study found that the increase in dying trees has been pervasive. Tree death rates have increased across a wide variety of forest types, at all elevations, in trees of all sizes, and in pines, firs, hemlocks, and other kinds of trees.

Regardless of the cause, higher tree death rates ultimately could lead to substantial changes in western forests, said Phil van Mantgem, a USGS scientist and co-leader of the research team. Such changes, the team noted, can have cascading effects, such as by changing forest suitability for wildlife species. Additionally, increasing tree mortality rates mean that western forests could become net sources of carbon dioxide to the atmosphere, further speeding up the pace of global warming.

"The same way that in any group of people a small number will die each year, in any forest a small number of trees die each year," said van Mantgem. "But our long-term monitoring shows that tree mortality has been climbing, while the establishment of replacement trees has not."

The result is that forests have begun to lose trees faster than they're gaining them, said van Mantgem.

The study's authors ruled out a number of possible sources of the increasing tree deaths, including air pollution, long-term effects of fire suppression, and normal forest dynamics. In contrast, increasing regional temperature was correlated with tree deaths.

"Average temperature in the West rose by more than 1 F over the last few decades," said van Mantgem. "While this may not sound like much, it has been enough to reduce winter snowpack, cause earlier snowmelt, and lengthen the summer drought."

The lengthening summe
'/>"/>

Contact: Phil van Mantgem
pvanmantgem@usgs.gov
707-825-5189
United States Geological Survey
Source:Eurekalert

Page: 1 2

Related biology news :

1. Stroke Belt deaths tied to non-traditional risk factors
2. Fewer deaths with preventive antibiotic use
3. New technology aims to reduce maternal and neonatal deaths
4. Study shows rise in Cornwalls dolphin, whale and porpoise deaths
5. Human deaths from shark attacks hit 20-year low last year
6. Earlier bites by uninfected mosquitoes boost West Nile deaths in lab mice
7. Small-scale fishing in Mexico rivals industrial fisheries in accidental turtle deaths
8. Warmer climate causing huge increase in tree mortality across the West
9. Effects of climate change vary greatly across plant families
10. Healthy Minds Across America features 48 public forums on mental health research, Sept. 14
11. Scientists find a fingerprint of evolution across the human genome
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:9/17/2014)... crime unit designed to fight food fraud in ... being passed off as beef scientists from Germany ... describe their approach, which represents a vast improvement over ... Food Chemistry . , Hans-Ulrich Humpf and colleagues note ... But they also say that adding, for example, horse ...
(Date:9/16/2014)... of severe maternal morbidity amongst women in Australia ... new study published today (17 September) in ... . , Australians generally enjoy high standards of ... disparities exist, in particular between indigenous and non ... explore the independent impact of socioeconomic position on ...
(Date:9/16/2014)... The 36 Pit Fire began on September 13, 2014. ... It is currently over 2,300 acres in size and ... The 36 Pit Fire was calm Monday night due to ... establishing an anchor point and beginning to construct a fireline ... The following resources are working on the fire: , 7 ...
Breaking Biology News(10 mins):New study examines the impact of socioeconomic position & maternal morbidity in Australia 2New study examines the impact of socioeconomic position & maternal morbidity in Australia 3
... at levels consumed by breast cancer patients and survivors in ... rats, new research found., The role of folate, a ... development and progression of breast cancer is highly controversial. ... breast cancer, recent studies have suggested that taking high amounts ...
... When the temperature rises on Baffin Island, in the ... ice for thousands of years, are exposed. Using radiocarbon ... has calculated the age of relic moss samples that ... moss samples would have been destroyed by erosion had ...
... the Montreal Neurological Institute and Hospital in Canada ... Parkinson,s disease are involved in the early-stage quality ... reported in T he EMBO Journal , removes ... mitochondria., "PINK1 and parkin, are implicated in selectively ...
Cached Biology News:Large amounts of folic acid shown to promote growth of breast cancer in rats 2Quality control of mitochondria as a defense against disease 2
(Date:9/17/2014)... Shimadzu Scientific Instruments introduces ... which offers a powerful separation method for ... provides a new level of knowledge and ... to scientists analyzing pharmaceutical impurities, proteins, lipids, ... Comprehensive 2D-LC combines two independent separation modes ...
(Date:9/17/2014)... PA & Rockville, MD (PRWEB) September 17, 2014 ... won a Small Business Innovation Research (SBIR) grant to ... immunotherapy. The award will provide ITI with approximately $255,000 ... Tree nuts, a leading cause of food allergy, affect ... cause of anaphylaxis behind peanut allergy. Tree nut exposure ...
(Date:9/17/2014)... , Sept. 17, 2014 /PRNewswire/ - SQI Diagnostics ... that develops and commercializes proprietary technologies and products for ... have been approved for trading in the ... Trading is expected to commence on September 17, 2014 ... will continue to trade on the TSX Venture Exchange ...
(Date:9/17/2014)... Escape Alert, LLC . filed international patents ... alert owners if their pet has escaped and enable them to ... in the pet’s body. This is the first implantable microchip ... been around for many years, they are passive until read by ... a pet’s location or alert the owner that the pet has ...
Breaking Biology Technology:Shimadzu’s New Nexera-e Two Dimensional Comprehensive Liquid Chromatograph Empowers Laboratories to Separate Even the Most Complex Mixtures 2Immunomic Therapeutics Awarded SBIR Grant to Develop Multi-Nut Allergy Immunotherapy 2Immunomic Therapeutics Awarded SBIR Grant to Develop Multi-Nut Allergy Immunotherapy 3SQI Diagnostics to begin Trading on the OTCQX Marketplace in the United States 2SQI Diagnostics to begin Trading on the OTCQX Marketplace in the United States 3Implantable Microchip for Pets with GPS Tracking - Patent Filed by Escape Alert, LLC. 2Implantable Microchip for Pets with GPS Tracking - Patent Filed by Escape Alert, LLC. 3
... train workforce, stimulate economy ALEXANDRIA, Va., May 7 ... budget request, proposing level funding for the Carl D. ... $1.3 billion. The Perkins Act is the primary source ... connect education and real-world careers. The Association for Career ...
... May 7 Elsevier,one of the world,s leading ... and services, announced today that Michael Hansen,CEO of ... in,light of recent allegations of improper Australia based ... "Elsevier prides itself on ...
... 7 The Sixth Annual Healthcare Unbound Conference & ... will feature the coming together of consumer and healthcare ... The Conference will take place at the Seattle ... Attendees will include a diverse representation of the ...
Cached Biology Technology:Obama Budget Level Funds Career Technical Education 2Obama Budget Level Funds Career Technical Education 3Statement From Michael Hansen, CEO of Elsevier's Health Sciences Division, Regarding Australia Based Sponsored Journal Practices Between 2000 and 2005 2Sixth Annual Healthcare Unbound Conference to Focus on Remote Monitoring, Home Telehealth & eHealth for Chronic Care Management & Wellness Promotion 2Sixth Annual Healthcare Unbound Conference to Focus on Remote Monitoring, Home Telehealth & eHealth for Chronic Care Management & Wellness Promotion 3
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...
... 2 products into 1:, , A multi-tube ... kit , ,The FastPrep System consists ... System Matrix and Isolation Kits. Samples are ... eliminating the use of metal probes and ...
... Blood bank refrigerators: ,Each upright ... and superior 4C temperature uniformity for refrigerated ... HemaPro 2000 Surveillance Module for complete blood ... BBR37 are equipped with the HemaPro 101 ...
... is an enhanced form of Tobacco Etch ... highly active, and significantly more stable than ... AcTEV Protease specifically recognizes a seven amino ... making it useful for removing affinity tags ...
Biology Products: