HOME >> BIOLOGY >> NEWS
Presence of wolves allows aspen recovery in Yellowstone

CORVALLIS, Ore. The wolves are back, and for the first time in more than 50 years, young aspen trees are growing again in the northern range of Yellowstone National Park.

The findings of a new study, just published in Biological Conservation, show that a process called the ecology of fear is at work, a balance has been restored to an important natural ecosystem, and aspen trees are surviving elk browsing for the first time in decades.

The research, done by forestry researchers at Oregon State University, supports theories about trophic cascades of ecological damage that can be caused when key predators in this case, wolves are removed from an ecosystem, and show that recovery is possible when the predators are returned. The results are especially encouraging for the health of Americas first national park, but may also have implications for other areas of the West and other important predators.

After an absence of 70 years, wolves were re-introduced to Yellowstone Park in 1995, and elk populations began a steady decline, cut in half over the past decade. Also, the presence of a natural predator appears to have altered the behavior of the remaining elk, which in their fear of wolves tend to avoid browsing in certain areas where they feel most vulnerable. The two factors together have caused a significant reduction in elk browsing on young aspen shoots, allowing them to survive to heights where some are now above the animal browsing level.

This is really exciting, and its great news for Yellowstone, said William Ripple, a professor in the OSU College of Forestry. Weve seen some recovery of willows and cottonwood, but this is the first time we can document significant aspen growth, a tree species in decline all over the West. Weve waited a long time to see this, but now were optimistic that things may be on the right track.

The study found significant numbers of aspen, especially in streamside riparian zones, tha
'"/>

Contact: William Ripple
bill.ripple@oregonstate.edu
541-737-3056
Oregon State University
26-Jul-2007


Page: 1 2 3

Related biology news :

1. Specialized, bone-crushing wolves of Alaska disappeared long ago
2. Ice Age extinction claimed highly carnivorous Alaskan wolves
3. Researchers determine why wolves not dispersing as fast as expected in Yellowstone
4. Contagious cancer in dogs confirmed; origins traced to wolves centuries ago
5. Killing wolves may not protect livestock efficiently
6. Gray wolves maintain the food chain in winter
7. The lost genetic legacy of American gray wolves
8. Cannibalism of the young allows individual fish to specialize
9. Social tolerance allows bonobos to outperform chimpanzees on a cooperative task
10. Expedition allows teachers to participate in polar research
11. Remarkable physiology allows crucian carp to survive months without oxygen

Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Presence wolves allows aspen recovery Yellowstone

(Date:7/2/2015)... -- Fingerprint Cards has received an order for ... the distributor World Peace Industrial Group (WPI), part of WPG ... Asia . Deliveries are planned to take place during ... smartphone manufacturers in Asia . The order ... guidance of approximately 2,200 MSEK for 2015. Jörgen ...
(Date:6/26/2015)... Utah , June 26, 2015 ATL Technology, ... and devices with specialties in single use solutions, headquartered in ... of MedConx, Inc. (a California corporation ... and San Jose, Costa Rica ). ... Costa Rica with ATL Technology,s existing facility ...
(Date:6/24/2015)... 24, 2015 The biologics safety testing market ... for the market include growth of the pharmaceutical and ... launches. Over the years, the number of drug approvals ... 2010, the FDA approved 225 drug applications and Health ... Europe accounted for 3,822 of the ...
Breaking Biology News(10 mins):FPC Receives Order for Touch Fingerprint Sensors of 268 MSEK 2ATL Technology Announces Acquisition of MedConx, Inc. and Expanded Global Footprint 2Biological Safety Testing Market by Application, Product, & Test - Global Forecast to 2019 2Biological Safety Testing Market by Application, Product, & Test - Global Forecast to 2019 3Biological Safety Testing Market by Application, Product, & Test - Global Forecast to 2019 4
(Date:7/1/2015)... PARK, N.C. and PARIS ... research firm AgBiome, and Genective, key developer of ... accelerate the discovery of new generations of insect ... for insect control to counter the realities of ... with Genective, aligning AgBiome,s unique insect control technology ...
(Date:7/1/2015)... , July 1, 2015  Axovant Sciences Ltd. ... on the treatment of dementia, today announced that ... July 22 at 5:45 p.m. EDT following its ... Association International Conference 2015 (AAIC). ... , Dr. Lawrence Friedhoff , Chief ...
(Date:7/1/2015)... CONNECTICUT (PRWEB) , ... July 01, 2015 , ... ... or sterilized to combat pathogen transmission. CTI’ new Medical Joysticks have an ... medical devices now have an operator control device that will increase healthcare worker ...
(Date:6/30/2015)... ... 30, 2015 , ... Park Systems , world-leader in ... into new classes of Nanoscale Graphene-based materials poised to revolutionize industries such as ... of the 21st Century' by the researchers who were awarded the 2010 Nobel ...
Breaking Biology Technology:AgBiome and Genective collaborate to create novel insect-resistant crops 2Axovant Sciences To Host Investor Briefing And Live Webcast During AAIC 2015 Meeting 2Axovant Sciences To Host Investor Briefing And Live Webcast During AAIC 2015 Meeting 3Sanitized Medical Joysticks for a Safer and Healthier Work Environment 2How Graphene–based Nanomaterials and Films Revolutionize Science Explained in July 9 Webinar Hosted by Park Systems 2How Graphene–based Nanomaterials and Films Revolutionize Science Explained in July 9 Webinar Hosted by Park Systems 3How Graphene–based Nanomaterials and Films Revolutionize Science Explained in July 9 Webinar Hosted by Park Systems 4
Cached News: