Navigation Links
Invading weed threatens devastation to western rangelands
Date:11/11/2010

ates more than 80 percent of the grazing value of land.

Experts at the Oregon Department of Agriculture say that once land is invaded by medusahead, it becomes largely worthless, incapable of supporting native animals, birds or livestock.

The sharp and twisting points on the tips of medusahead injure the eyes and mouths of animals, and give the plant its name - based on the female monster in Greek mythology that had hair composed of writhing snakes. The plant takes up other soil resources and its deep root system soaks up limited moisture. It creates fuel for wildfires, has a high silicon content that wears away the teeth of animals, is virtually inedible, and it prevents many other plants from germinating.

"Annual grass invasion is driving one of the largest changes in vegetation structure ever documented," the researchers wrote in their new study. "This conversion has major negative impacts on ecosystem function, wildlife and fire regimes.

"We expect that medusahead will continue to invade both native perennial and less-undesirable invasive annual grasslands, because of its higher relative growth rate and extended period of growth," they reported.

Medusahead is not a new problem, only a rapidly worsening one. Native to the Mediterranean region, it was imported to the United States in the late 1880s and has gradually established footholds since then.

It's now found on about 2.5 million acres in the U.S. much less than other invading species such as cheatgrass but it's widespread in the Pacific Northwest and most of Oregon, including the Willamette Valley. Its impact on ecosystems when established is far greater than some other species, experts say, and it has evolved many traits that allow it to invade North America.

"For too long we've treated these invasive species as something you just mow, spray with herbicides, or chop out somehow, and then forget about them," Mangla said. "That just treats the s
'/>"/>

Contact: Seema Mangla
seema.mangla@oregonstate.edu
541-737-8475
Oregon State University
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Barrier in mosquito midgut protects invading pathogens
2. Researchers examine plants ability to identify, block invading bacteria
3. Fish fend off invading germs with an initial response similar to the one found in people
4. Plant protein doorkeepers block invading microbes, study finds
5. Plant protein doorkeepers block invading microbes, study finds
6. How algae enslavement threatens freshwater bodies described by Hebrew University researcher
7. Oil spill threatens toothy marine predator that is cultural and historic icon
8. Climate threatens trout and salmon
9. Deadly fungus threatens 9 bat species in Ga., Ky., N.C., S.C. and Tenn., expert says
10. Global warming threatens plant diversity
11. A second hydrocarbon boom threatens the Peruvian Amazon
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/23/2015)... LOS ANGELES , March 23, 2015  In ... in Federal fraud case conviction losses. This figure accounts ... fraud, which, according to The Nilson Report, exceeds $11 ... an investigative tool after a crime has occurred. Investor ... Agent and polygraph expert Joe Paolella partnered ...
(Date:3/20/2015)... 20, 2015 Research and Markets ... the "India Sensors Market Forecast and Opportunities ... The sensor market is projected to grow at ... Consumer electronics, automotive, industrial and healthcare sectors are ... country. In addition, adoption of MEMS technology in ...
(Date:3/20/2015)... , March 20, 2015 NXT-ID, Inc. (NASDAQ: ... authentication company focused on the growing mobile commerce market, ... is one of the products featured in 2015 "I ... at 11:00 PM EST on the DIY Network.   ... Las Vegas , site of the 2015 ...
Breaking Biology News(10 mins):Polygraph Test Now Used to Protect Investors From Fraud 2Polygraph Test Now Used to Protect Investors From Fraud 3India Sensors Market Forecast and Opportunities 2020 - STMicroelectronics held the largest share in 2014 2India Sensors Market Forecast and Opportunities 2020 - STMicroelectronics held the largest share in 2014 3NXT-ID's Wocket Biometric Smart Wallet to Air on "I Want That" International CES Special 2NXT-ID's Wocket Biometric Smart Wallet to Air on "I Want That" International CES Special 3
... CITY)Vision scientists long have thought that lack of very long ... with Stargardt type 3 retinal degeneration, an incurable eye disease. ... Eye Center have shown in a new study that lack ... the search for the mechanism that robs sight from children ...
... sign of continuing evolution in the college textbook market, ... industry leader (NYSE:JWa, JWb), and Rice University-based OpenStax College, ... The partnership calls for Wiley to deliver content from ... its online learning, practice and assessment resources that ...
... can change DNA topology, making DNA twist up into a so-called ... of the proteinknown as mini-chromosome maintenance (MCM)in cancer cells, which have ... of a rubber band while holding the other end still. After ... you keep on turning, the twisted band will twist back upon ...
Cached Biology News:Long-suspected cause of blindness from eye disease disproved 2Unlikely partners create innovative product for college biology 2Protein abundant in cancerous cells causes DNA 'supercoiling' 2
(Date:4/1/2015)... April 01, 2015 The concept of “spot ... multi-billion dollar industry. Founder of Fasciology, Ashley Black, says that ... of fat, instead of having to wait for the whole ... that “ prior to fat cooling procedures, the only ... contouring, was liposuction, which is a highly invasive procedure.” It ...
(Date:4/1/2015)... England , April 1, 2015 ... biotechnology company developing novel biological drugs to treat ... pleased to announce the appointment of Christina ... will be responsible for providing medical and regulatory ... the Company. Dr. Coughlin has extensive ...
(Date:3/31/2015)... VANCOUVER , March 31, 2015  /PRNewswire/ - ESSA Pharma ... that it has filed with the Food and Drug ... ("IND") application related to the Company,s proposed clinical trial ... IND application is required in order for ESSA to ... The IND application is a complete description ...
(Date:3/31/2015)... 2015 Pittcon 2015, the 66th Conference ... on March 12, in New Orleans with an economic ... estimated by the New Orleans Convention and Visitor's Bureau. ... and exhibitor personnel. Those who attended Pittcon for ... For the third year, the co-location of Food Labs ...
Breaking Biology Technology:Hybrid Health Guru, Ashley Black, announces that her invention The FasciaBlaster™ rivals the “fat cooling” procedures that reduce exercise and diet resistant fat pockets. 2Hybrid Health Guru, Ashley Black, announces that her invention The FasciaBlaster™ rivals the “fat cooling” procedures that reduce exercise and diet resistant fat pockets. 3Immunocore Appoints Dr. Christina Coughlin as Chief Medical Officer 2Immunocore Appoints Dr. Christina Coughlin as Chief Medical Officer 3Immunocore Appoints Dr. Christina Coughlin as Chief Medical Officer 4ESSA Pharma Inc. Announces Filing of Investigational New Drug Application for EPI-506 2ESSA Pharma Inc. Announces Filing of Investigational New Drug Application for EPI-506 3ESSA Pharma Inc. Announces Filing of Investigational New Drug Application for EPI-506 4Pittcon 2015 Hits the Big Easy in a Big Way 2Pittcon 2015 Hits the Big Easy in a Big Way 3Pittcon 2015 Hits the Big Easy in a Big Way 4
... Solve and Prevent Crimes, CARLSBAD, N.M., April 17 ... the efforts of US Attorney General,Michael Mukasey in bringing ... DNA testing provisions enacted by Congress in,late 2005. These ... in their own states. The federal law requires a ...
... that it will build a new biotech research & ... early-stage evaluation of GM and,native traits for key crops ... yield,improvement, drought resistance, disease control and biomass conversion for,biofuels. ... will complement,Syngenta,s biotech research activities in the US. The ...
... As nanotechnology has moved out of the laboratory and ... impact of nanoscale materials on health and the environment. ... daunting task, given the number of potential products, the ... and leverage costs toward a more efficient, timely international ...
Cached Biology Technology:Mothers of Victims Applaud Federal Effort to Collect DNA Upon Arrest 2Syngenta To Build Major Global Biotech Research Center in Beijing, China 2Syngenta To Build Major Global Biotech Research Center in Beijing, China 3International Council on Nanotechnology launches global research needs assessment 2