HOME >> BIOLOGY >> NEWS
Wolf reintroduction reshapes Yellowstone ecology

The 1995 reintroduction of wolves in the northern range of Yellowstone National Park has led to increased growth of willow and cottonwood in the park by causing fear responses in elk and other ungulates, according to William J. Ripple and Robert L. Beschta of Oregon State University in Corvallis. Ripple and Beschta, writing in the August 2004 issue of BioScience, argue that fear of predation when wolves are present changes grazing patterns, prompting grazers to avoid sites that deny them easy escape and to browse less thoroughly. The "terrain fear factor" consequently allows woody plants and trees to grow taller and thicker when wolves are present. This in turn has allowed beaver colonies to expand.

Ripple and Beschta base their conclusions on theory about feeding relationships between species, browsers' risk of predation since the reintroduction of wolves into the park in 1995, and empirical research. In the view of Ripple and Beschta, extirpation of wolves in the early 20th century was "most likely the overriding cause of the precipitous decline and cessation in the recruitment of aspen, cottonwood and willow across the nothern range."

The new theory thus brings a significant new factor into long-running, intense debates over the proper management of Yellowstone. Ripple and Beschta conclude that, for Yellowstone, "restoration goals should focus on the recovery of natural processes." The identified fear factor might also be important in other regions, although the evidence is less well developed. Journalists may obtain copies of the article by contacting Donna Royston, AIBS communications representative.


'"/>

Contact: Donna Royston
droyston@aibs.org
202-628-1500 x261
American Institute of Biological Sciences
2-Aug-2004


Page: 1

Related biology news :

1. 19th century museum specimens help plan reintroduction of endangered tiger beetle
2. Yellowstones long-distance travelers in trouble, study says
3. Wolves are rebalancing Yellowstone ecosystem
4. Yellowstone wolves, grizzlies and moose dysfunctional study says
5. Lake tributaries in Yellowstone National Park allow unique study of whirling disease
6. Without bears and wolves to hunt them, Yellowstone moose have lost some spring in their step, study says
7. Scientist searches Yellowstone Park for carbon dioxide-eating microbe
8. New study shows bison dont favor groomed roads in Yellowstone National Park
9. Microbial transport at Yellowstone: by land, sea or air?
10. Wolves in Yellowstone may aid aspen recovery
11. USGS scientist receives award for brucellosis research in Greater Yellowstone Area

Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Wolf reintroduction reshapes Yellowstone ecology

(Date:11/5/2014)... career to understanding the Earth,s climate and communicating ... deputy director and regional climatologist for the Western ... Redmond has more than three decades of experience ... data to the general public. , At its ... December 15-19, 2014 the American Geophysical Union (AGU) ...
(Date:11/4/2014)... 2014 – University of Utah engineers developed the first ... fuel produce electricity without needing to ignite the fuel. ... portable electronics, off-grid power and sensors. , A study ... American Chemical Society journal ACS Catalysis . , ... reaction between a fuel and an oxygen-rich source such ...
(Date:11/4/2014)... University School of Medicine announced today that it ... funded by the Bill & Melinda Gates Foundation. ... Gynecology and Reproductive Sciences; and Vice Chair of ... of Medicine will pursue an innovative global health ... to Assess Fetal Neurodevelopment.", Grand Challenges Explorations (GCE) ...
Breaking Biology News(10 mins):Nevada climatologist to be honored at AGU Fall Meeting for lifetime of public outreach 2Jet-fueled electricity at room temperature 2Temple University School of Medicine receives Grand Challenges Explorations grant 2
(Date:11/22/2014)... During his lifetime Richard L. Sharp was ... himself with great people and take risks to achieve ... marveled at his extraordinarily courageous attitude when taking on ... even with his death impending—that’s how he continued looking ... ultimately take his life. , Carrying on Sharp’s relentless ...
(Date:11/22/2014)... (PRWEB) November 21, 2014 RURO, ... solutions provider, has released Limfinity® version 5.1.4. , ... projects of Limfinity® than ever in RURO’s 8 ... and minority framework enhancement. Limfinity® version 5.1.4 is ... above and beyond bug fixes! , Limfinity® 5.1.4 ...
(Date:11/22/2014)... 22, 2014 Respiratory therapy students ... proper management of life-like respiratory ailments using the ... . Grand Rapids-based, Michigan Instruments Inc. developers of ... of the respiratory simulation units to the pro-gram, ... Valley and Muskegon Community College are collaborating to ...
(Date:11/21/2014)... Quebec , November 21, 2014 ... como responsable comercial   Mariano Rodríguez es ...   KLOX está en marcha para comenzar ... de cura de heridas de reciente aprobación en Europa   ... "la compañía") se complace al anunciar los siguientes nombramientos: ...
Breaking Biology Technology:Sherry Sharp, Wife of CarMax Founder, Richard Sharp, Accepts Seat on Board of Cure Alzheimer’s Fund 2Sherry Sharp, Wife of CarMax Founder, Richard Sharp, Accepts Seat on Board of Cure Alzheimer’s Fund 3RURO Announces Limfinity® version 5.1.4 2Michigan Instruments Donates Two Respiratory Simulation Training and Test Lung (TTL) Devices to Grand Valley State University 2Michigan Instruments Donates Two Respiratory Simulation Training and Test Lung (TTL) Devices to Grand Valley State University 3KLOX Technologies anuncia sus nombramientos ejecutivos 2KLOX Technologies anuncia sus nombramientos ejecutivos 3KLOX Technologies anuncia sus nombramientos ejecutivos 4KLOX Technologies anuncia sus nombramientos ejecutivos 5
Cached News: