HOME >> BIOLOGY >> NEWS
Disease opened door to invading species in California

of the first Spanish settlers in the 1600s and 1700s brought with them cattle, grazing, and new annual grasses that, even though they appeared to be inferior competitors, rapidly displaced native perennial grasses in California and also parts of the Pacific Northwest.

"The complete change in grassland ecosystems brought with it more damaging fire regimes, shorter grazing seasons, and altered water and carbon cycles" said Eric Seabloom, an OSU assistant professor of zoology and co-author of the study. "Annual grasses like wild oats, barley, and ripgut brome helped to damage what had been one of the richest and most diverse plant communities in the world."

What the OSU researchers found, however, was that the invading grasses might never have become dominant were it not for a plant pathogen called barley yellow dwarf virus, which reduces plant growth, lowers seed production and increases mortality. In the absence of this pathogen, the native plants would have been able to rebuff the invaders and persist, rather than being overtaken, the study concluded.

"Not only were the native grasses under constant challenge from this disease, but the characteristics of the new grasses helped to spread the disease much more efficiently," Borer said. "It just beat them down, and they were not able to compete successfully."

This virus had been in the native California grasses for a long time, the scientists said, but when the annual grasses were added to the mix, they changed the infection rates in the native perennial grasses. The higher infection rate in the natives probably allowed the annuals to invade and take over this vast grassland.

The research was conducted with a $1.8 million grant from the National Science Foundation, under the Ecology of Infectious Disease grant program, and in collaboration with scientists at Princeton University.

This is the first study to quantitatively demonstrate that an existing pathogen
'"/>

Contact: Elizabeth Borer
borer@science.oregonstate.edu
541-737-3701
Oregon State University
12-Mar-2007


Page: 1 2 3

Related biology news :

1. Disease-free mosquito bred to disease-carrier can have all disease-free progeny
2. Journal of Alzheimers Disease achieves significant impact factor
3. How the Biotech Revolution Is Changing the Way We Fight Disease
4. Digestive Disease Week 2007 spotlights breakthrough research in digestive health
5. Diseased brain cells more involved in ALS-associated motor neuron death
6. Disease can be our ally, not just our enemy, says new book by UCR evolutionary biologist
7. ASM Biodefense and Emerging Diseases Research Meeting
8. Top scientists meet for Global Conference on Stem Cell Therapy for Cardiovascular Diseases
9. U of S Vaccine and Infectious Disease Organization team discovers key step in flu virus replication
10. NSF, NIH award Ecology of Infectious Diseases grants
11. Disease of older adults now seen in young, obese adults

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:3/5/2020)... ... 2020 , ... Patients in need of new teeth after tooth extraction or ... Dental Implants of Ocala. Same-day dental implants allow patients with an entire ... one day. This treatment utilizes advanced technology and Dr. Brand’s unique experience and skills ...
(Date:3/5/2020)... (PRWEB) , ... March 05, 2020 , ... ... AlphaSTEM Test™ technology . The AlphaSTEM Test™ is the first, and ... stem cells. Other technologies that attempt to provide information about the number ...
(Date:3/4/2020)... ... 04, 2020 , ... The Massachusetts Medical Device Industry Council ... program’s 2020 IGNITE Cohort. The MedTech IGNITE Program is a virtual accelerator offering ... generation of medtech founders and entrepreneurs. IGNITE Cohort members get access to medtech, ...
Breaking Biology News(10 mins):
(Date:2/21/2020)... ... February 20, 2020 , ... ... and elegant chemistry. Humans have been increasingly successful in innovating ways to ... rapidly evolving technologies and strategies for modern molecular biology (e.g., gene sequencing, ...
(Date:2/21/2020)... ... February 21, 2020 , ... Join Forrest Brown, Engineering Services ... Sequence, Inc. for an informative session on Wednesday, February 26, ... Key elements to incorporate into facility design to add manufacturing flexibility in the future, ...
(Date:2/19/2020)... (PRWEB) , ... February 18, 2020 , ... ... tools for characterizing microbiome populations down to the strain level, recently unveiled a ... kit designed for efficient and unbiased isolation of high molecular weight (HMW) single-stranded ...
(Date:2/19/2020)... (PRWEB) , ... February 19, 2020 , ... ... process solutions for the life sciences industry, today announced the opening of a ... Nagamura, Associate Partner, Red Nucleus R&D. , Red Nucleus announced the new office ...
Breaking Biology Technology:
Cached News: