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:9/1/2014)... after birth, every child in the U.S. undergoes a ... conditions, including sickle cell disease. Thousands of children born ... many suffer and die from the disease each year. ... to at least some of those deaths. , ... in the lab of George Whitesides, the Woodford L. ...
(Date:9/1/2014)... basic building block of DNAcould initiate fragile X syndrome, the most ... The Journal of Cell Biology . , ... on the X chromosome called fragile X mental retardation 1 ... men carry a so-called premutation, in which a series of DNA ... slightly longer than normal. These repeats are prone to even further ...
(Date:9/1/2014)... to a life without light. They emit echolocation sounds and ... to obstacles or prey. In their brains, they have a ... by researchers at Technische Universitt Mnchen (TUM) has shown for ... factors. , Closer objects appear larger ... object, the number of activated neurons in its brain increases. ...
Breaking Biology News(10 mins):Faster, cheaper tests for sickle cell 2Faster, cheaper tests for sickle cell 3A nucleotide change could initiate fragile X syndrome 2Zooming in for a safe flight 2
... June 1, 2010 -- The National Oceanic and Atmospheric ... of Miami (UM) to continue to lead its partnership ... (CIMAS). NOAA and UM scientists have worked ... of climate, hurricanes, and marine ecosystems along the southeastern ...
... Since the 1990s, a green fluorescent protein known simply as ... Northwest jellyfish, GFP allows scientists to visualize proteins inside of ... Two years ago, biologists who discovered and developed the protein ... work. However, using GFP as a fluorescent probe has ...
... viable due to aberrant chromosome distribution if they had ... German Cancer Research Center have investigated which genes are ... revealed that cancer cells rely on the tension ... Thus, proteins which maintain this tension are promising targets ...
Cached Biology News:NOAA selects University of Miami to lead major southeastern US cooperative institute 2NOAA selects University of Miami to lead major southeastern US cooperative institute 3MIT chemists design new way to fluorescently label proteins 2No relaxing for cancer cells 2
(Date:9/1/2014)... September 01, 2014 The global ... million by 2019 from $1,070.7 million in 2014, ... to 2019. The global oligonucleotide synthesis market is ... applications, end users, and geography. The synthesized oligonucleotides ... rate in the oligonucleotide synthesis market during the ...
(Date:8/31/2014)... 2014 Market Research Report ... and in-depth research report on the Polyacrylamide ... including Polyacrylamide definition, classification, application, and industry ... This research covers the international market analysis, ... industry analysis covering macroeconomic environment & economic ...
(Date:8/29/2014)... electrons, but one of the most promising technologies for ... on light (photons) instead of electrons. First, it is ... single photons and control their direction. Researchers around the ... this control, but now scientists at the Niels Bohr ... photons emitted one at a time and in a ...
(Date:8/29/2014)... - iCo Therapeutics ("iCo" or "the Company") (TSX-V: ... the six months ended June 30, 2014. Amounts, ... and presented under International Financial Reporting Standards ("IFRS"). ... , Announced top-line results related to the eight ... enrolled in the Phase 2 iDEAL Study evaluating ...
Breaking Biology Technology:9.8% CAGR for Oligonucleotide Synthesis Market Globally to 2019 Says a New Research Report Available at RnRMarketResearch.com 29.8% CAGR for Oligonucleotide Synthesis Market Globally to 2019 Says a New Research Report Available at RnRMarketResearch.com 39.8% CAGR for Oligonucleotide Synthesis Market Globally to 2019 Says a New Research Report Available at RnRMarketResearch.com 49.8% CAGR for Oligonucleotide Synthesis Market Globally to 2019 Says a New Research Report Available at RnRMarketResearch.com 5International Polyacrylamide Industry & Copper Iodide Market Data Analysis Now Available at DeepResearchReports.com 2International Polyacrylamide Industry & Copper Iodide Market Data Analysis Now Available at DeepResearchReports.com 3Breakthrough in light sources for new quantum technology 2iCo Therapeutics Announces Second Quarter 2014 Financial Results 2iCo Therapeutics Announces Second Quarter 2014 Financial Results 3iCo Therapeutics Announces Second Quarter 2014 Financial Results 4
... /PRNewswire/ -- The Nano Science and Technology Institute ... will take place May 3-7, 2009 at the George R. ... 12th year, the largest and most prominent Nanotechnology event is ... Micro and Bio technology executives, who will gather to promote ...
... CLINTON, N.J., Jan. 8 Ikaria Holdings, Inc. today ... present at the 27th Annual JPMorgan Healthcare Conference on ... The conference will be held January 12-15 at The ... Holdings, Inc. , Ikaria Holdings, Inc. is a ...
... /PRNewswire/ - Aegera Therapeutics Inc. announced today the ... Phase 2 study of AEG35156, their targeted antisense ... , The study, entitled "A Phase 2, Multicenter, ... Apoptosis (XIAP) Antisense AEG35156 Given In Combination With ...
Cached Biology Technology:NSTI Announces the 12th Annual Nanotech Conference & Expo 2009 May 3-7, at the George R. Brown Convention Center in Houston, Texas 2NSTI Announces the 12th Annual Nanotech Conference & Expo 2009 May 3-7, at the George R. Brown Convention Center in Houston, Texas 3NSTI Announces the 12th Annual Nanotech Conference & Expo 2009 May 3-7, at the George R. Brown Convention Center in Houston, Texas 4Ikaria(R) to Present at 27th Annual JPMorgan Healthcare Conference 2Aegera Therapeutics Initiates A Randomized Phase 2 Combination Study of AEG35156 for 1st Line Treatment of Non-Small Cell Lung Cancer 2
The Programmable MP-5000P-F Power Supply can be applied for any Microfluidic application....
...
Handy 100V Power Supply is Low-cost, compact and lightweight. Easy to operate - either 50 or 100 VDC is selectable as the output voltage. These voltages are sufficient for ordinary electrophoresis....
... Major Science Smart Minis 150V power supply ... mini power supplies designed to meet most ... to use unit. The Minis 150V power ... The Minis Power Supply is designed for ...
Biology Products: