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:


(Date:4/18/2017)... Calif. , April 18, 2017  Socionext Inc., a global ... of a media edge server, the M820, which features the company,s ... recognition software provided by Tera Probe, Inc., will be showcased during ... at the NAB show at the Las Vegas ... ...
(Date:4/13/2017)... , April 13, 2017 According to a ... Identity Authentication, Identity Analytics, Identity Administration, and Authorization), Service, Authentication Type, Deployment ... the IAM Market is expected to grow from USD 14.30 Billion in ... Rate (CAGR) of 17.3%. ... MarketsandMarkets Logo ...
(Date:4/11/2017)... 11, 2017 No two people are ... the New York University Tandon School of Engineering ... found that partial similarities between prints are common ... mobile phones and other electronic devices can be ... vulnerability lies in the fact that fingerprint-based authentication ...
Breaking Biology News(10 mins):
(Date:10/9/2017)... ... October 09, 2017 , ... At its national board meeting in North Carolina, ... Harvard University’s Departments of Physics and Astronomy, has been selected for membership in ... team for the 2015 Breakthrough Prize in Fundamental physics for the discovery of the ...
(Date:10/7/2017)... ... October 06, 2017 , ... ... providing advanced instruments and applications consulting for microscopy and surface analysis, Nanoscience ... application consulting, Nanoscience Analytical offers a broad range of contract analysis services ...
(Date:10/6/2017)... ... October 06, 2017 , ... ... healthcare and technology sector at their fourth annual Conference where founders, investors, innovative ... speakers and the ELEVATE pitch competition showcasing early stage digital health and med ...
(Date:10/5/2017)... PA (PRWEB) , ... October 05, 2017 , ... Understanding ... the newest frontiers in human health. Gut Love: You Are My Future, the newest ... an artist’s perspective as it explores the human condition through the lens of the ...
Breaking Biology Technology:
Cached News: