Navigation Links
Texas A&M professor helping to unravel causes of Ice Age extinctions
Date:11/2/2011

COLLEGE STATION -- Did climate change or humans cause the extinctions of the large-bodied Ice Age mammals (commonly called megafauna) such as the woolly rhinoceros and woolly mammoth? Scientists have for years debated the reasons behind the Ice Age mass extinctions, which caused the loss of a third of the large mammals in Eurasia and two thirds of the large mammals in North America, and now, an inter-disciplinary team from more than 40 universities around the world led by Professor Eske Willerslev and his group from the Centre for GeoGenetics, University of Copenhagen, have tried to answer the contentious question in one of the biggest studies of its kind ever.

The study by the team, which includes two Texas A&M University professors, is published online today in the journal Nature and reveals dramatically different responses of Ice Age species to climate change and human impact. Using ancient DNA, species distribution models and the human fossil record, the findings indicate that neither climate nor humans alone can account for the Ice Age mass extinctions.

"Our findings put a final end to the single-cause theories of these extinctions," says Willserslev. "Our data suggest care should be taken in making generalizations regarding past and present species extinctions; the relative impacts of climate change and human encroachment on species extinctions really depend on which species we're looking at."

The study reports that climate alone caused extinctions of woolly rhinoceros and musk ox in Eurasia, but a combination of climate and humans played a part in the loss of bison in Siberia and wild horse. While the reindeer remain relatively unaffected by any of these factors, the reasons causes of the extinction of the mammoth remain unresolved.

The study also reports that climate change has been intrinsically linked with major population size changes over the past 50,000 years, supporting the view that populations of man
'/>"/>

Contact: Keith Randall
keith-randall@tamu.edu
979-845-4644
Texas A&M University
Source:Eurekalert

Page: 1 2

Related biology news :

1. Earth scientists keep an eye on Texas
2. 7 Texas mammals listed as threatened on Global Mammal Assessment
3. Texas A&M anthropologist discovers long-lost primate in Indonesia
4. Texas invests record $3.5 million in startup cofounded by UTs Mauro Ferrari
5. Texas College Police Unit Deploys BIO-key(R) Mobile Data System
6. UT Southwestern scientist honored among best in Texas research
7. Texas Medical Center researchers win collaborative grants
8. Famous fossil Lucy scanned at the University of Texas at Austin
9. Texas researchers provide emissions data for livestock industry
10. Texas Obesity Research Center at UH assembles researchers to discuss obesity
11. Texas-sized tract of single-celled clones
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:10/29/2014)... food, but they also need protection from its harmful rays, ... molecules in plants that shields them from sun damage. Now, ... Chemical Society , one team reports on the mechanics of ... colleagues at Purdue University note that the harsh ultraviolet radiation ... plant DNA and, as a result, hinder plant growth. ...
(Date:10/29/2014)... decompose, their types and numbers of bugs and ... mean the difference between a closed case and ... using a more than $866,000 U.S. Department of ... these changing populations. The microbial communities may provide ... gender, race, socioeconomic relations and more, said Eric ...
(Date:10/29/2014)... MA and Hebei, China — BGI Tech and Hebei ... of the Jujube genome. Jujube is the most economically ... genome is particularly difficult to sequence due the high ... the first time that a genome in the Rhamnaceae ... recently published in Nature Communications . ...
Breaking Biology News(10 mins):MSU partners with Detroit to investigate death scenes 2BGI Tech and Hebei Agricultural University complete the genome sequencing of the jujube tree 2
... human health in the past, and are bound to ... for example, led to many illnesses and deaths from ... people vying for scarce food, shelter, and work. ... health ramifications. Following a request from Gov. Christine Gregoire, ...
... -- A slightly greater number of males than females are ... still more baby boys born than girls, there has been ... newborns in several industrialized countries, including Canada, Denmark, England, Germany, ... ask: Are there any factors that can influence the probability ...
... who have lower-pitched voices have more children than do ... their study suggests that for reproductive-minded women, mate selection ... in Biology Letters, offers insight into the evolution of ... our mates. In previous studies, David Feinberg, assistant ...
Cached Biology News:University and state agencies to forecast local health effects of climate change 2University and state agencies to forecast local health effects of climate change 3University and state agencies to forecast local health effects of climate change 4Weight gain between first and second pregnancies associated with increased odds of male second child 2
(Date:10/30/2014)... San Diego, CA (PRWEB) October 30, 2014 ... company announced today that they have manually curated public ... Pharma and non profit customers. the data is ... BioSciences manually curates and unifies public and internal data ... more value and knowledge out of the data that ...
(Date:10/30/2014)... 30, 2014 Grace Century portfolio project, ... Manganello, Chairman of the Board, to the National Stem ... appointment was made by the Ministry of Health on behalf ... , More than a year after Bahamian Parliament ... Prime Minister Perry Christie said the government has completed the ...
(Date:10/30/2014)... severe flooding that devastated a wide swath of Colorado ... bridges, roads and other infrastructure had been upgraded or ... of Colorado Denver. , "People need to understand the ... associate professor of structural engineering at the CU Denver ... the study. "There is an assumption that a bridge ...
(Date:10/27/2014)... -- Kalorama Information says that PCR is demonstrating its ... the United States and is the dominant ... the FDA,s Emergency Use Authorization (EUA) to authorize the emergency ... of the Ebola virus was an indication that the ... IVD industry and its biennial survey on diagnostics markets ...
Breaking Biology Technology:Rancho BioSciences Manually Curated TCGA Data Sets Available 2Grace Century’s Stem Cell Biobank Project Announces Chairman’s Appointment to National Stem Cell Ethics Committee of The Bahamas 2Grace Century’s Stem Cell Biobank Project Announces Chairman’s Appointment to National Stem Cell Ethics Committee of The Bahamas 3CU Denver study says upgrading infrastructure could reduce flood damage 2Kalorama: PCR The Go-to Test in Ebola Fight 2Kalorama: PCR The Go-to Test in Ebola Fight 3
... 2012 The Houston Technology Center (HTC), ... annual gala, "A Celebration of Entrepreneurs . " ... significant impact on the region,s economy; and developed lifesaving ... named Beth Williams, CEO of TechTrans International, Inc., as ...
... 21, 2012  Neuralstem, Inc. (NYSE MKT: CUR) announced ... at the World Stem Cells & Regenerative Medicine ... May 22nd at 12:30 PM. Mr. Garr,s presentation, ... Neuralstem,s cellular therapy trial in ALS, its neurogenic ...
...  Intellect Neurosciences, Inc. (OTCPK: ILNS) announces that Dr. ... will be presenting at the Seventh Annual Neurotech ... http://photos.prnewswire.com/prnh/20111214/NY22484LOGO ) The title of ... Attractive Targets for Active and Passive Immunotherapy." His ...
Cached Biology Technology:Leading Technology Incubator Honors Extraordinary Entrepreneurs 2Leading Technology Incubator Honors Extraordinary Entrepreneurs 3Neuralstem CEO to Present at the World Stem Cells and Regenerative Medicine Congress in London 2Intellect Neurosciences, Inc. to Present at Neurotech Investing and Partnering Conference 2Intellect Neurosciences, Inc. to Present at Neurotech Investing and Partnering Conference 3
... dispensers save space and organize gloves, ... garb. They are the perfect benchtop ... in labs, processing and manufacturing. Clear ... the particles they attract. Open-slot design ...
... critical to the maintenance of appropriate ... as important and diverse as those ... and stress response, antigen presentation, modulation ... channels, cell cycle regulation, transcription, and ...
... Pooled Human Serum • Human serum is ... found to be negative by a test ... Antibodies to Human Immunodeficiency Virus (Anti-HIV 1/2), ... Hepatitis B Surface Antigen (HbsAg) and Non-reactive ...
... Cleanroom-grade vinyl curtains or ... powder-coated steel support frame to ... cleanroom that meets cleanliness to ... HEPA filter/fan units, lights, and ...
Biology Products: