Navigation Links
Danger lurks underground for oak seedlings
Date:3/3/2009

WEST LAFAYETTE, Ind. - Scientists trying to understand why oaks are starting to disappear from North American forests may need to look just below the surface to find some answers.

Purdue University researcher Robert Swihart found that pine voles, small rodents that live underground, prefer oak roots to those of other commonly growing seedlings. The study identifies the rodents as a possible factor leading to high oak mortality rates that are threatening the resource base of the hardwood industry.

"You see a lot of mature oaks, but you don't see a lot of oaks in the understory beneath the canopy. If you don't see them there, you won't see mature oaks in 20 to 30 years," Swihart said. "We are facing a period in our history that could lead to a great crash in oak availability."

Swihart offered pine voles a selection of tree roots to eat in the laboratory, and they overwhelmingly gravitated toward oak roots. Voles caused more than twice as much damage to white oak roots than northern red oak and black cherry, and more than six times more damage to white oak than black walnuts. The voles snubbed yellow poplar roots altogether.

"Either the oak roots were much more nutritious and had higher energy content, or they contained fewer toxins, or some combination of those factors. Those are the main reasons an animal will choose one food item over another," Swihart said.

Swihart's study has been published in the current edition of the Canadian Journal of Zoology.

Under a variety of growing conditions, oak seedlings have comparatively high mortality rates, allowing other trees such as shade-tolerant maples and sun-loving, fast-growing tulip poplars to make up larger percentages of hardwood forests. Most of the studies on why oaks have a hard time regenerating have focused on competition from other seedlings, the use of acorns as food for small animals above the ground and the use of oak seedlings as food for deer
'/>"/>

Contact: Brian Wallheimer
bwallhei@purdue.edu
765-496-2050
Purdue University
Source:Eurekalert  

Page: 1 2

Related biology news :

1. Study identifies warning signs of pregnancy danger
2. Student study bolsters case for adding a rare sunflower to the endangered species list
3. CABI helps phase out dangerous pesticide in EU
4. Nicotine may accelerate atherosclerosis, may be as dangerous as tar
5. Dangerous liaisons
6. Student study bolsters case for adding a rare sunflower to the endangered species list
7. Researchers discover forests of endangered tropical kelp
8. Critically endangered Amur leopard captured
9. Worlds most endangered gorilla fights back
10. Dolphin therapy a dangerous fad, Emory researchers warn
11. Critically endangered porpoise is focus of new research report
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Danger lurks underground for oak seedlings
(Date:12/22/2014)... 22, 2014 Research and Markets ... addition of the "The Global Watermarking ... offering. http://photos.prnewswire.com/prnh/20130307/600769 ... overview of the global digital media watermarking ... and monitor piracy by securely and invisibly ...
(Date:12/19/2014)... , Dec. 18, 2014   LaunchKey , ... for the post-password and Internet of Things era, today ... funding. The venture round was led by Metamorphic Ventures ... Rimrock Venture Partners, VegasTechFund, and others.  LaunchKey has raised ... funding to expand its team and bring LaunchKey to ...
(Date:12/17/2014)... Dec. 16, 2014 Research and Markets ... of the "Global Chemical Sensor Market 2015-2019" ... http://photos.prnewswire.com/prnh/20130307/600769 One major ... demand for medical sensors in biomedical applications. Chemical ... quick and correct diagnosis during surgical procedures. The ...
Breaking Biology News(10 mins):The Global Watermarking and Fingerprinting Markets 2LaunchKey Raises $3 Million in Additional Funding Led by Metamorphic Ventures 2LaunchKey Raises $3 Million in Additional Funding Led by Metamorphic Ventures 3Global Chemical Sensor Market 2015-2019: Key Vendors are Abbott Laboratories, Bayer, Hoffmann La-Roche, Johnson & Johnson, NGK Spark Plugs and Robert Bosch 2
... Respiratory syncytial virus (RSV) infection is a widespread infant illness ... but may be curable by the development of this new ... and The University of Queensland's Faculty of Biological and Chemical ... cost millions of dollars a year in health care in ...
... by just 1.2 percent, yet there is a considerable difference ... A new study showed that a certain form of neuropsin, ... is expressed only in the central nervous systems of humans ... The study, which also demonstrated the molecular mechanism that creates ...
... immune system component that is a primary cause of ... rheumatoid arthritis actually protects bone in the oral cavity ... periodontal disease in humans, research at the University at ... only in the past 18 months to be a ...
Cached Biology News:UQ research heralds vaccine technology breakthrough 2Gene mutation linked to cognition is found only in humans 2Molecule that destroys bone also protects it, new research shows 2Molecule that destroys bone also protects it, new research shows 3
(Date:12/22/2014)... Dec. 22, 2014  ( www.competitivehealth.com ) — Competitive ... medical bill review and advocacy service, has signed an ... WellCard Savings discount health services marketplace. 63% ... more than they expected to pay. As part of ... costs, WellCard Savings is pleased to offer medical bill ...
(Date:12/22/2014)... 22, 2014 Fertility Associates of Memphis ... Bank USA , a network of more than 20 ... partnership, patients have fast access to a national pool ... IVF . Fertility Associates of Memphis is the only ... treatment option. , Dr. William Kutteh , director ...
(Date:12/19/2014)... BioPlus Specialty Pharmacy (BioPlus), one ... of Nick Maroulis, Pharm.D. to the newly created position ... In this position, Dr. Maroulis will continue to manage ... of our multi-site pharmacies as the company expands. Dr. ... that time he has served in many different capacities ...
(Date:12/19/2014)... Dec. 19, 2014 Bina Technologies, Inc. (Bina, ... that they have been acquired by Roche (SIX: RO, ... privately held company that provides a big data platform ... (NGS) data for the academic and translational research markets. ... and will continue to focus on development of their ...
Breaking Biology Technology:WellCard Savings Announces CoPatient Medical Bill Review Service for Members 2Fertility Associates of Memphis Announces Partnership with Donor Egg Bank USA 2Fertility Associates of Memphis Announces Partnership with Donor Egg Bank USA 3BioPlus Specialty Pharmacy Promotes Dr. Nick Maroulis to Vice President of Specialty Pharmacy Services 2Bina Technologies is acquired by Roche. 2Bina Technologies is acquired by Roche. 3
... , , HOPKINTON, Mass., July 30 ... reported that for the second quarter of 2009 revenues were $32.1 ... Divestitures and foreign currency translation negatively impacted comparative revenues by ... The Company narrowed its net loss to $4.1 million ($0.08 per ...
... TOKYO, July 30 With a business plan to launch ... subsidiary of,the Zydus group, one of India,s leading integrated pharma ... big boost to its operations,in the Japanese generic market which ... estimated at $ 60 bn the generic market is only,about ...
... PLEASANTON, Calif., FRAMINGHAM, Mass. and SYDNEY, ... a world leader in device-based mechanical circulatory support therapies to ... (Nasdaq: HTWR ; ASX: HIN), which develops and ... States Federal Trade Commission ("FTC") has informed them that the ...
Cached Biology Technology:Caliper Life Sciences Reports Second Quarter 2009 Results 2Caliper Life Sciences Reports Second Quarter 2009 Results 3Caliper Life Sciences Reports Second Quarter 2009 Results 4Caliper Life Sciences Reports Second Quarter 2009 Results 5Caliper Life Sciences Reports Second Quarter 2009 Results 6Caliper Life Sciences Reports Second Quarter 2009 Results 7Caliper Life Sciences Reports Second Quarter 2009 Results 8Caliper Life Sciences Reports Second Quarter 2009 Results 9Caliper Life Sciences Reports Second Quarter 2009 Results 10"Over the Next 2-3 Years We Will Leverage Developmental Capabilities and Explore In-licensing and a Co-development Model to Consolidate Our Presence in Japan" - Dr. Kailash Sharma, President, Japan Operations, Zydus Cadila 2U.S. Federal Trade Commission to Challenge Thoratec's Proposed Acquisition of HeartWare International 2U.S. Federal Trade Commission to Challenge Thoratec's Proposed Acquisition of HeartWare International 3U.S. Federal Trade Commission to Challenge Thoratec's Proposed Acquisition of HeartWare International 4
Human Cell Line Slides...
... Each Signet Level 2 Detection ... the avidin-biotin chemical bonding principle and ... to provide sensitivity, specificity and reliablility. ... immunostaining in both manual and automated ...
Mouse monoclonal [3576] to Yellow Fever Virus ( Abpromise for all tested applications). Antigen: Tissue / cell preparation...
... Level 2 Detection System combines the ... bonding principle and Signets unique formulation ... specificity and reliablility. Signet reagents will ... manual and automated protocols. ,Signets ...
Biology Products: