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:10/17/2014)... is critical and pertinent for practicing physicians and clinicians ... epidemic. The Journal, Disaster Medicine and Public Health ... and Public Health, to surround the public, medical professionals ... moment. , On October 17, the journal published ... primer was prepared by Dr. Eric Toner, internist and ...
(Date:10/16/2014)... the human body. Battles are won, lost or ... this stalemate—known as tumor dormancy—can last up to ... that is poorly understood. , A new ... Torquato, a Professor of Chemistry at Princeton University, ... and the switch to a malignant state. Published ...
(Date:10/16/2014)... can be cultivated efficiently, they are anything but ... by monoculture cultivation is becoming increasingly evident. Despite ... form and are regarded as the sole possibility ... quite wrongfully, finds Bernhard Schmid, an ecology professor ... novel form of agriculture and forestry. After all, ...
Breaking Biology News(10 mins):Modeling tumor dormancy 2Plant communities produce greater yield than monocultures 2Plant communities produce greater yield than monocultures 3
(Date:10/18/2014)... The Asian Electronic Medical Record (EMR) market ... analysis and forecast of revenue. The electronic medical record market ... million by 2018, at a CAGR of 9.4% from 2013 ... Electronic Medical Record (EMR) market, to get an idea of ... the segmentation of the market in the same region, and ...
(Date:10/18/2014)... 18, 2014 The “Global Diagnostic ... Monitor), by End-user (Hospitals, Home/Ambulatory, Research Center, Physician ... 12) -Global Forecast to 2020” provides a detailed ... current market trends, and strategies impacting the global ... forecasts of the revenue and share analysis. , ...
(Date:10/17/2014)... October 17, 2014 For the ... employers, as published in today’s print issue of ... annual Top Employers Survey polled employees in the ... 20 best employers. Rankings were determined based ... to rate their companies on 23 characteristics, including ...
(Date:10/17/2014)... Europe Fuel Additives Market report defines and segments the ... of revenue. , Browse through the TOC of the ... of the in-depth analysis provided. This also provides a ... market, and is supported by various tables and figures. ... chemicals that are used to enhance the properties of ...
Breaking Biology Technology:The Asian Electronic Medical Record (EMR) market is estimated to grow to $2,328.0 million by 2018 - New Report by MicroMarket Monitor 2The Asian Electronic Medical Record (EMR) market is estimated to grow to $2,328.0 million by 2018 - New Report by MicroMarket Monitor 3The Asian Electronic Medical Record (EMR) market is estimated to grow to $2,328.0 million by 2018 - New Report by MicroMarket Monitor 4The Asian Electronic Medical Record (EMR) market is estimated to grow to $2,328.0 million by 2018 - New Report by MicroMarket Monitor 5The Electrocardiograph (ECG) Market Is Expected to Reach $5,435 Million By 2020 - New Research Report by MarketsandMarkets 2The Electrocardiograph (ECG) Market Is Expected to Reach $5,435 Million By 2020 - New Research Report by MarketsandMarkets 3The Electrocardiograph (ECG) Market Is Expected to Reach $5,435 Million By 2020 - New Research Report by MarketsandMarkets 4The Electrocardiograph (ECG) Market Is Expected to Reach $5,435 Million By 2020 - New Research Report by MarketsandMarkets 5DuPont Named Top Employer by Science Magazine 2DuPont Named Top Employer by Science Magazine 3The Europe Fuel Additives Market is estimated to grow to $1,401.4 million by 2018 - New Report by MicroMarket Monitor 2The Europe Fuel Additives Market is estimated to grow to $1,401.4 million by 2018 - New Report by MicroMarket Monitor 3The Europe Fuel Additives Market is estimated to grow to $1,401.4 million by 2018 - New Report by MicroMarket Monitor 4
Cached News: