Navigation Links
Declining fortunes of Yellowstone's migratory elk
Date:6/28/2013

ration allows animals to capitalize on seasonal foods and to shelter from predators and the elements. Elk and their hooved brethren have benefited from chasing the spring "green-up" into higher terrain as snow retreats, leaving behind, at least temporarily, their predators, which are pinned down by the needs of young pups and cubs.

Middleton's observations therefore demonstrate a severe reversal of fortunes. Ecologists have reported troubled times for migrating animals all over the world, and attributed the problems to habitat changes wrought by human development and climate change. Middleton et al. point to the same influences, but draw a subtle distinction which they believe makes this a novel case study.

The Yellowstone elk enjoy some of the best open range of modern times, and a migratory path unimpeded by conspicuous physical barriers of modern infrastructure. Middleton et al argued that drought and the return of predators, specifically bears, to Yellowstone are causing the observed low pregnancy rate and low calf survival for migratory elk.

"Many of the forum commentaries discuss the implications of our work for management and conservation of large carnivores and their prey in Yellowstone, especially wolves," said Middleton. "However, a persistent focus on the impact of re-introduced wolves among scientists, wildlife managers, and the public misses key roles of grizzly bears and severe drought in limiting elk populations."

Over the last two decades, summers have been hotter and dryer in the summer range of the migratory Clarks Fork elk. Satellite imagery shows that the length of spring vegetation "green-up," a critical time for female elk to gain the fat the need to support reproduction, shortened by 27 days over 21 years. During the same time period, wolves were reintroduced to the park, and the numbers of wolves and bears are growing. Both pressures are ultimately the result of human choices through our manipulations of predators and increa
'/>"/>

Contact: Liza Lester
llester@esa.org
202-833-8773 x211
Ecological Society of America
Source:Eurekalert

Page: 1 2 3 4

Related biology news :

1. Bioeconomy as a solution for South Australias declining forest industry
2. Declining air pollution levels continue to improve life expectancy in US
3. Environmental change impacts on migratory shorebirds differ for males and females
4. New research on migratory behavior of oceanic whitetip sharks can help shape conservation strategies
5. Migratory moths profit from their journey
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:11/4/2014)... PA) – Temple University School of Medicine announced ... winner, an initiative funded by the Bill & ... Professor of Obstetrics, Gynecology and Reproductive Sciences; and ... Temple University School of Medicine will pursue an ... "Maternal Blood Biomarkers to Assess Fetal Neurodevelopment.", Grand ...
(Date:11/4/2014)... 4, 2014   ...   Fuel3D , a developer of 3D ... round totaling $6.4 million (£4 million). This funding builds on ... this year and paves the way for the commercial launch ... The funding round was led by Chimera Partners and will ...
(Date:11/3/2014)... Research and Markets has announced the addition of a ... to their offering. This report describes ... started to play an important role in the practice of ... bone marrow transplants. Role of cells in drug discovery is ... of medical practice. Stem cells are discussed in ...
Breaking Biology News(10 mins):Temple University School of Medicine receives Grand Challenges Explorations grant 2Fuel3D Secures $6.4 Million in Expansion Funding 2Fuel3D Secures $6.4 Million in Expansion Funding 3Global Cell Therapy - Technologies, Markets and Companies: 2014 Report 2Global Cell Therapy - Technologies, Markets and Companies: 2014 Report 3
... (March 18, 2009) As any parent knows, children ... University of Washington and the Monell Center indicates that ... and is related to children,s high growth rate. ... sense because when growth is rapid, caloric demands increase. ...
... Mrs. Bruce Reid recorded seeing both a male and ... 1938, Oscar McKinley Bryans observed a ruby-throated hummingbird in ... apple trees were blooming. These are just two of ... on notecards in government files. The cards record more ...
... 2009 Dr. Daniel Von Hoff, Physician-In-Chief of the ... recognizing his achievements in cancer research. Dr. Von ... Clinical Research Services at Scottsdale Healthcare, will be recognized ... special report this month in Arizona Business Magazine. ...
Cached Biology News:Liking sweets makes sense for kids 2It's for the birds 2It's for the birds 3TGen's Dr. Von Hoff wins award for cancer research 2
(Date:11/28/2014)... 28, 2014 The American Association ... University’s School of Nursing with a very prestigious ... program. The 2014 Innovations in Professional Nursing Education ... schools and supports them as they re-envision traditional ... at AACN’s annual meeting in Washington, D.C. to ...
(Date:11/27/2014)... Research and Markets  has announced the ... 2014" report to their offering. ... Acid Industry Report 2014 is a professional and in-depth ... acid industry. The report provides a basic ... industry chain structure. The palmitic acid market analysis is ...
(Date:11/27/2014)... -- Calcivis, a medical devices company ... today announces that it has completed a first ... System. The Calcivis Caries Activity Imaging ... combination designed to transform the assessment and management ... unique, proprietary bioluminescence approach combined with a specialised ...
(Date:11/26/2014)... 26, 2014 The report on the ... segments the concerned market for revenue forecasts and market ... CAGR of 51.9% from 2013 to 2018. At the ... value of $1,415.6 million by 2018. , Browse through ... TOC for information about the market segmentation and in-depth ...
Breaking Biology Technology:American Association of Colleges of Nursing honors Fairfield University’s School of Nursing for Re-envisioning Nursing Education 2Global Palmitic Acid Industry Report 2014 2Calcivis Completes Clinical Study of Novel Caries Activity Imaging System 2Calcivis Completes Clinical Study of Novel Caries Activity Imaging System 3Global Smart Sensor Market in Building Automation is expected to reach a value of $1,415.6 million by 2018 - Report by MicroMarket Monitor 2Global Smart Sensor Market in Building Automation is expected to reach a value of $1,415.6 million by 2018 - Report by MicroMarket Monitor 3Global Smart Sensor Market in Building Automation is expected to reach a value of $1,415.6 million by 2018 - Report by MicroMarket Monitor 4
... VIENNA, Austria, November 28 f-star, an antibody,engineering company ... Modular Antibody Technology, today announced that it,has raised EUR ... of its Series,A financing round, originally co-led by Aescap ... raised in the Series A round,increases to EUR 9.0 ...
... 1-41 has significant ... and anti-amnesic benefits, GENEVA, Nov. 28 /PRNewswire-FirstCall/ - ... announce promising developments with,ANAVEX 1-41, the company,s lead drug ... 1-41 prevented oxidative stress,which damages and destroys cells and ...
... November 28 The results of a,study on ... desensitisation product, which is due to receive German ... VO52.06, which was carried out on 280,patients in ... the main evaluation criterion by,demonstrating a statistically significant ...
Cached Biology Technology:Antibody Engineering Company f-star Raises EUR 3.0 Million in a Second Closing of its Series A Financing Round From Novo A/S 2Antibody Engineering Company f-star Raises EUR 3.0 Million in a Second Closing of its Series A Financing Round From Novo A/S 3Anavex advances drug candidate for treatment of Alzheimer's disease 2Anavex advances drug candidate for treatment of Alzheimer's disease 3Anavex advances drug candidate for treatment of Alzheimer's disease 4Anavex advances drug candidate for treatment of Alzheimer's disease 5STALLERGENES: ORALAIR Grasses: Positive Results of VO52.06 Paediatric Study 2
Human PDGF R beta MAb (Clone # PR7212)...
Zebrafish Ephrin-B2 Biotinylated Affinity Purified PAb...
Collected from 8-12 week old New Zealand or Californian rabbits. Aseptically collected and processed to minimize hemolytic activity. Pricing: $60/unit for 1 - 10 units...
One-step, microplate or cuvet, colorimetric, detection range 0.3 g/dL to 5 g/dL. Procedure: 5 min....
Biology Products: