Navigation Links
Latitude and rain dictated where species lived
Date:5/12/2011

birds) get rid of bodily waste in the form of uric acid in a solid or semisolid form that contains very little water.

On Pangaea, the mammals needed a water-rich area, so the availability of water played a decisive role in determining where they lived. "It's interesting that something as basic as how the body deals with waste can restrict the movement of an entire group," Whiteside said.

In water-limited areas, "the reptiles had a competitive advantage over mammals," Whiteside said. She thinks the reptiles didn't migrate into the equatorial regions because they already had found their niche.

The researchers compiled a climate record for Pangaea during the late Triassic period, from 234 million years ago to 209 million years ago, using samples collected from lakes and ancient rift basins stretching from modern-day Georgia to Nova Scotia. Pangaea was a hothouse then: Temperatures were about 20 degrees Celsius hotter in the summer, and atmospheric carbon dioxide was five to 20 times greater than today. Yet there were regional differences, including rainfall amounts.

The researchers base the rainfall gap on variations in the Earth's precession, or the wobble on its axis, coupled with the eccentricity cycle, based on the Earth's orbital position to the sun. Together, these Milankovitch cycles influence how much sunlight, or energy, reaches different areas of the planet. During the late Triassic, the equatorial regions received more sunlight, thus more energy to generate more frequent rainfall. The higher latitudes, with less total sunlight, experienced less rain.

The research is important because climate change projections shows areas that would receive less precipitation, which could put mammals there under stress.

"There is evidence that climate change over the last 100 years has already changed the distribution of mammal species," said Danielle Grogan, a graduate student in Whiteside's research group. "Our study c
'/>"/>

Contact: Richard Lewis
Richard_Lewis@brown.edu
401-863-3766
Brown University
Source:Eurekalert  

Page: 1 2 3

Related biology news :

1. Evidence is weak for tropical rainforest 65 million years ago in Africas low-latitudes
2. Better food makes high-latitude animals bigger
3. Iron and biological production in the high-latitude North Atlantic
4. Earths biodiversity: What do we know and where are we headed?
5. Water, water, everywhere… but is it safe to drink?
6. Where did flowers come from?
7. Water, water everywhere focus of new sustainability project
8. Where unconscious memories form
9. Where did you get those eyes and that brain?
10. Tuning into cell signals that tell where sensory organs will form inside the ear
11. Where do the drugs go?
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Latitude and rain dictated where species lived
(Date:9/30/2014)... do seedless watermelon, salmon, and strawberries all have in ... two sets of chromosomes and are diploid, these organisms ... sets of chromosomesseedless watermelon and salmon have 3 and ... While this might seem surprising, in fact most ... first discovered over a century ago, but only recently, ...
(Date:9/30/2014)... A team of environmental scientists and engineers, led ... awarded a three-year, $5.25 million grant from the ... Competitive Research to make a direct positive impact ... remediation and disposal of radioactive contaminants. , "Understanding ... adequately dealing with environmental aspects of nuclear technologies ...
(Date:9/30/2014)... is available in German . ... the most expensive foods in the world. Because they grow ... But the distinctive smell of truffles is not only of ... under the direction of the Goethe University Frankfurt have discovered ... soil bacteria which are trapped inside truffle fruiting bodies. , ...
Breaking Biology News(10 mins):Gene doubling shapes the world: Instant speciation, biodiversity, and the root of our existence 2Gene doubling shapes the world: Instant speciation, biodiversity, and the root of our existence 3Gene doubling shapes the world: Instant speciation, biodiversity, and the root of our existence 4Researchers get $5.25 million to advance nuclear technologies in South Carolina 2On the trail of the truffle flavor 2
... The biggest ever single UK public investment in bioenergy ... main funding agency for the biosciences the Biotechnology ... 27M BBSRC Sustainable Bioenergy Centre has been launched to ... and emerging UK sustainable bioenergy sector and to ...
... Switzerland, Jan. 26 SVOX, the leading provider ... the Professional,Speech Processing Group of Siemens AG, according ... speech technology-related IP of Siemens AG developed,over 25 ... more than 60 patent families. The majority of ...
... Spring Harbor Laboratory (CSHL) announced today the discovery of ... time, they reported that their discovery suggests the presence ... in which these and possibly other small RNAs are ... project called ENCODE, also provided information concerning the biological ...
Cached Biology News:Biggest ever public investment in bioenergy to help provide clean, green and sustainable fuels 2SVOX Acquires Speech Processing Unit of Siemens AG, Expands Into Speech Recognition and Speech Dialog 2CSHL scientists find a new class of small RNAs and define its function 2CSHL scientists find a new class of small RNAs and define its function 3
(Date:10/1/2014)... San Francisco, California (PRWEB) October 01, 2014 ... grant from the National Science Foundation to expand their ... approaches to build and modify DNA. The Small Business ... help commercialize the “j5” technology under exclusive license from ... the Joint BioEnergy Institute , an LBNL laboratory ...
(Date:10/1/2014)... , October 1, 2014 ... software invited to engage around the theme, ,Commercial Opportunities ...   Elsevier , a ... and services, will host a gathering of some of ... and trends impacting healthcare today and in the future. ...
(Date:9/30/2014)... This news release is available in German . ... at the Technische Universitt Mnchen (TUM) have demonstrated a ... Their experiments show that future computer chips could be ... transistors. As the main enabling technology of the semiconductor ... fundamental limits, the TUM researchers and collaborators at the ...
(Date:9/30/2014)... YORK , Sept. 30, 2014 ... and segments with highest potential revenues Do you ... updated report gives you revenue predictions for those ... For those therapies you find financial data, R&D ... analysis you get sales forecasts to 2024 at ...
Breaking Biology Technology:TeselaGen Receives $750k NSF SBIR Phase II Award 2TeselaGen Receives $750k NSF SBIR Phase II Award 3Elsevier Healthcare and Pharmaceutical Economics Conference 2014 To Convene Industry Leaders to Discuss Top Healthcare Business Issues 2Elsevier Healthcare and Pharmaceutical Economics Conference 2014 To Convene Industry Leaders to Discuss Top Healthcare Business Issues 3A new dimension for integrated circuits: 3-D nanomagnetic logic 2A new dimension for integrated circuits: 3-D nanomagnetic logic 3Biosimilars and Follow-On Biologics: World Industry and Market Prospects 2014-2024 2Biosimilars and Follow-On Biologics: World Industry and Market Prospects 2014-2024 3Biosimilars and Follow-On Biologics: World Industry and Market Prospects 2014-2024 4Biosimilars and Follow-On Biologics: World Industry and Market Prospects 2014-2024 5
... made of clay and a bit of high-grade plastic draws oil ... lab tests show that oil absorbed can be squeezed back out ... the material, called an aerogel, believe it will effectively clean up ... and roadways, rivers and oceans. , The EPA estimates that 10 ...
... Feb. 4, 2010 -- Four Oak Ridge National Laboratory ... five-year research grants as part of the Department of ... million program, funded under the American Recovery and Reinvestment ... to support exceptional researchers during the crucial early career ...
... , , IPSWICH, Mass. ... to the Wellcome Trust Sanger Institute, New England Biolabs is ... England Biolabs as one of its suppliers for next-generation sequencing ... "We are extremely pleased that the Wellcome Trust Sanger Institute, ...
Cached Biology Technology:New material absorbs, conserves oil 24 ORNL researchers selected for Recovery Act early career funds 24 ORNL researchers selected for Recovery Act early career funds 3Wellcome Trust Sanger Institute to use NEBNext(TM) DNA Sample Preparation Reagents from New England Biolabs for Next Generation Sequencing 2
Request Info...
Our original highly-purified, robust Taq Polymerase which delivers consistently high yields and minimal background...
Recombinant DNA polymerase from Thermus aquaticus expressed in E. coli; 5 units/L; 1 tube of 1, 000 units enzyme/tube w/Buffer II and MgCl2...
Taq DNA Polymerase (T. aquaticus), 4 x 250 units. For PCR and other procedures requiring DNA polymerase activity at elevated temperatures. Category: Nucleotides & Enzymes & Biochemicals, Modifying En...
Biology Products: