Navigation Links
CU-Boulder study shows 53 million-year-old high Arctic mammals wintered in darkness
Date:6/1/2009

Ancestors of tapirs and ancient cousins of rhinos living above the Arctic Circle 53 million years ago endured six months of darkness each year in a far milder climate than today that featured lush, swampy forests, according to a new study led by the University of Colorado at Boulder.

CU-Boulder Assistant Professor Jaelyn Eberle said the study shows several varieties of prehistoric mammals as heavy as 1,000 pounds each lived on what is today Ellesmere Island near Greenland on a summer diet of flowering plants, deciduous leaves and aquatic vegetation. But in winter's twilight they apparently switched over to foods like twigs, leaf litter, evergreen needles and fungi, said Eberle, curator of fossil vertebrates at the University of Colorado Museum of Natural History and chief study author.

The study has implications for the dispersal of early mammals across polar land bridges into North America and for modern mammals that likely will begin moving north if Earth's climate continues to warm. A paper on the subject co-authored by Henry Fricke of Colorado College in Colorado Springs and John Humphrey of the Colorado School of Mines in Golden appears in the June issue of Geology.

The team used an analysis of carbon and oxygen isotopes extracted from the fossil teeth of three varieties of mammals from Ellesmere Island -- a hippo-like, semi-aquatic creature known as Coryphodon, a second, smaller ancestor of today's tapirs and a third rhino-like mammal known as brontothere. Animal teeth are among the most valuable fossils in the high Arctic because they are extremely hard and better able to survive the harsh freeze-thaw cycles that occur each year, Eberle said.

Telltale isotopic signatures of carbon from enamel layers that form sequentially during tooth eruption allowed the team to pinpoint the types of plant materials consumed by the mammals as they ate their way across the landscape through the seasons, Eberle said. <
'/>"/>

Contact: Jaelyn Eberle
jaelyn.eberle@colorado.edu
303-492-8069
University of Colorado at Boulder
Source:Eurekalert  

Page: 1 2 3 4

Related biology news :

1. CU-Boulder team discovers first ancient manioc fields in Americas
2. Nutrient pollution drives frog deformities by ramping up infections, says CU-Boulder study
3. CU-Boulder worm study sheds light on human aging, inherited diseases
4. CU-Boulder technology used to identify unexpected bacteria in cystic fibrosis patients
5. Conservation strategies must shift with global environmental change, says CU-Boulder study
6. Dust in West up 500 percent in past 2 centuries, says CU-Boulder study
7. Regional nuclear conflict would create near-global ozone hole, says CU-Boulder study
8. Low-gravity training machine reduces joint, muscle impacts, says CU-Boulder study
9. CU-Boulder, biotech firm team up on python project in search for human cardiac therapeutics
10. Biological invasions increasing due to freshwater impoundments, says CU-Boulder study
11. As Andean glacier retreats, tiny life forms swiftly move in, CU-Boulder study shows
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
CU-Boulder study shows 53 million-year-old high Arctic mammals wintered in darkness
(Date:7/31/2014)... available in German . ... gases similar to a sponge that soaks up liquids. ... hydrogen or greenhouse gases. However, loading of many MOFs ... Technology (KIT) now report in Nature Communications ... MOF surface. This can be prevented by water-free synthesis ...
(Date:7/31/2014)... the photovoltaic effect in 1839, humankind has sought to ... its own purposes. In a new research report published ... FASEB Journal , scientists may have uncovered a ... focusing on a naturally occurring combination of lipids that ... over time and across speciessuggests that this specific natural ...
(Date:7/31/2014)... Professor of Clinical Surgery at LSU Health Sciences Center ... team of plastic and reconstructive surgeons who report a ... select patients for a specific surgical migraine treatment technique. ... surgery to decompress the nerves that trigger migraines experienced ... The study, which confirms the benefit of surgical treatment ...
Breaking Biology News(10 mins):Free pores for molecule transport 2Scientists shine bright new light on how living things capture energy from the sun 2Surgeons report significant migraine relief from cosmetic eyelid surgery technique 2
... disease ever eradicated. In two studies in the Dec. 15 ... scientists are working to ensure that once it is gone, ... immune systems were weakened by HIV would re-introduce poliovirus into ... switching forms of vaccine from a live, attenuated vaccine to ...
... for millennia, but there has been great controversy about ... Proceedings of the National Academies of Sciences, a team ... University of Wisconsin-Madison has for the first time demonstrated ... potato. , The scientists analyzed DNA markers in 261 ...
... Pumps implanted into the chest to maintain circulation can ... end-stage heart failure who are not candidates for heart ... led by Duke University Medical Center cardiologists. , The ... employed when the heart's left ventricle ?the chamber of ...
Cached Biology News:Polio vaccination strategies assessed as eradication nears 2Polio vaccination strategies assessed as eradication nears 3Finding rewrites the evolutionary history of the origin of potatoes 2Implantable pumps extend lives of patients too sick for transplant 2Implantable pumps extend lives of patients too sick for transplant 3
(Date:8/1/2014)... transport of light is the photonic analog of topological ... case, the current flows around the edge of the ... "topological" in that even if electrons encounter impurities in ... losing energy., In the ... regular material but in a meta-material consisting of an ...
(Date:8/1/2014)... , Aug. 1, 2014 Research ... "The World Market for Flow Cytometry in ... http://photos.prnewswire.com/prnh/20130307/600769 ... are now an important component of advanced IVD ... instruments for cancer diagnostics, but their newer clinical ...
(Date:8/1/2014)... One of the major revolutions taking place ... is the practice of using genomic and other molecular ... biology. Personalized diagnostics—laboratory analyses that inform the practice of ... future. This fall, AACC ,s first ever ... this exciting field and the novel technologies driving it ...
(Date:8/1/2014)... 2014 Once a decision has been ... webinar will discuss how to define your tolerance for ... Bob Allen, Senior Director of Facilities Integration at Fluor ... Fluor Industrial Services, and special guest Carrier Li, Director ... Amgen, as they provide an examination of the Conceptual ...
Breaking Biology Technology:On-chip topological light 2On-chip topological light 3The World Market for Flow Cytometry in IVD Applications 2First-Ever AACC Virtual Conference to Focus on Personalized Diagnostics 2Defining Low Cost in Your Solution for Future Facilities, New Webinar for Pharma, Biotech, Medical Device and Healthcare Companies, Hosted by Xtalks 2
... Solos Endoscopy, Inc. (Pink Sheets: SNDY) is pleased ... agreement with Lifeline Biotechnologies, Inc. (Pink Sheets: LLBO) ... to Lifeline Biotechnologies for a combination of stock, ... Endoscopy originally purchased the products from Lifeline Biotechnologies ...
... plc (LSE: SHP, NASDAQ: SHPGY ) announces ... Court of the Southern District of,New York against Mylan ... for infringement of Shire,s,patent: U.S. Patent No. 5,968,976 (",976 ... filed in response to an Abbreviated New Drug Application,("ANDA") ...
... 20 A new, innovative study,shows that a ... plus dexamethasone not only prevents chemotherapy-induced nausea,and vomiting ... oncology,patients. Data presented today at the ESMO Symposium ... New data presented today at ...
Cached Biology Technology:Solos Endoscopy, Inc. Sells Ovascope and Mastascope Product Line to Lifeline Biotechnologies, Inc. 2Shire Files Lawsuit Against Mylan for Infringement of FOSRENOL(R) (Lanthanum Carbonate) Patent 2Shire Files Lawsuit Against Mylan for Infringement of FOSRENOL(R) (Lanthanum Carbonate) Patent 3Palonosetron Warrants Adequate Caloric Intake in Oncology Patients Receiving High Emetogenic Chemotherapy 2Palonosetron Warrants Adequate Caloric Intake in Oncology Patients Receiving High Emetogenic Chemotherapy 3Palonosetron Warrants Adequate Caloric Intake in Oncology Patients Receiving High Emetogenic Chemotherapy 4
... Thermo has established an expertise in ... both for solid support synthesis and synthesis ... controlled by Mass Spectrometry and analytical HPLC ... provide products that meet the highest quality ...
The Wellwash 4 Mk 2 microplate washer combines flexibility, simplicity and ease of use. This reliable microplate washer meets the exacting standards of today's ELISA assay requirements....
... These handy dispensers save space and ... and other garb. They are the ... parts used in labs, processing and ... charges and the particles they attract. ...
... dispensers save space and organize ... and other garb. They are ... for small parts used in ... acrylic. Many other sizes and ...
Biology Products: