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:12/17/2014)... Valencell, a leader in performance biometric data ... industry leaders such as Intel, Jabra, Atlas, and Scosche ... products. These products will be showcased at CES 2015, ... . "Our partners choose PerformTek ... – with the clinical data to back it up," ...
(Date:12/11/2014)... , Dec. 09, 2014 Research and Markets ... ( http://www.researchandmarkets.com/research/9ql3kr/biometrics_market ) has announced ... India 2015-2019" report to their offering. ... market is the adoption of multimodal biometric systems. ... of an individual for verification and identification purposes. ...
(Date:12/10/2014)... 9, 2014  Wake Forest Baptist Medical Center today announced ... School of Medicine. Funding for this $50 million capital ... will be publicly launched next summer. ... former 60 series R.J. Reynolds Tobacco Company complex, adjacent ... begin immediately with plans to be ready to welcome ...
Breaking Biology News(10 mins):Valencell PerformTek Biometrics Power the Most Accurate Wearables at CES 2015 2Biometrics Market in India 2015-2019: Key Vendors are 3M Cogent, NEC, Safran and Suprema 2Wake Forest Baptist to Build New Medical Education Facility In Wake Forest Innovation Quarter 2Wake Forest Baptist to Build New Medical Education Facility In Wake Forest Innovation Quarter 3Wake Forest Baptist to Build New Medical Education Facility In Wake Forest Innovation Quarter 4
... report on a new way of preventing potentially harmful plasticizers ... migrating from one of the most widely used groups of ... polyvinyl chloride (PVC) plastics that are safer than those now ... say. Their study is in ACS, Macromolecules , a ...
... 2, 2010 -- A hormone responsible for the body,s stress ... in the pancreas, according to JDRF- funded researchers at the ... are the latest advances to underscore the potential for regeneration ... 1 diabetes. The research, which was published ...
... North Carolina State University have developed a "smart coating" that ... off infection. When patients have hip, knee or dental ... reject the implant. But the smart coating developed at NC ... implant. The coating creates a crystalline layer next to the ...
Cached Biology News:JDRF-funded research advances potential for regeneration as a possible cure for type 1 diabetes 2Smart coating opens door to safer hip, knee and dental implants 2
(Date:12/19/2014)... OR and Hershey, PA (PRWEB) December 19, 2014 ... Pink: BJCT), a leading developer and manufacturer of ... entered into an agreement with Immunomic Therapeutics, Inc. ... Biojector®-2000 needle-free injection device with its LAMP™ vaccine ... an option for an exclusive Worldwide license to ...
(Date:12/19/2014)... BioPlus Specialty Pharmacy (BioPlus), one of ... Nick Maroulis, Pharm.D. to the newly created position of ... this position, Dr. Maroulis will continue to manage the ... our multi-site pharmacies as the company expands. Dr. Maroulis ... time he has served in many different capacities in ...
(Date:12/19/2014)... , Dec. 19, 2014  Roche (SIX: RO, ROG; ... Technologies, Inc. (Bina), a privately held company based ... USA. Bina provides a big data platform for ... (NGS) data. Bina,s proprietary on-market Genomic Management Solution, ... researchers to perform fast and scalable analyses to ...
(Date:12/19/2014)... 19, 2014 Decision Resources Group finds that ... a 12 percent compound annual growth rate through 2023. ... population and the increasing adoption of dental implants. Growing ... will also spur demand for dental biomaterials because they ... periodontal treatments. Other key findings from Decision ...
Breaking Biology Technology:Bioject and Immunomic Therapeutics Enter into an Agreement for License of Needle-Free Technology for LAMP-vax Vaccines 2Bioject and Immunomic Therapeutics Enter into an Agreement for License of Needle-Free Technology for LAMP-vax Vaccines 3BioPlus Specialty Pharmacy Promotes Dr. Nick Maroulis to Vice President of Specialty Pharmacy Services 2Roche acquires Bina Technologies and enters the genomic informatics market 2Roche acquires Bina Technologies and enters the genomic informatics market 3Latin American Dental Biomaterial Market Will Expand at a 12 Percent Annual Growth Rate Through 2023 2Latin American Dental Biomaterial Market Will Expand at a 12 Percent Annual Growth Rate Through 2023 3
... , , , SOUTH SAN ... RIGL ) today announced the pricing of an underwritten public offering ... the public of $7.25 per share. All of the shares are ... up to an additional 1,950,000 shares to cover over-allotments, if any. ...
... , HAYWARD, Calif., Sept. 17 Intarcia ... study comparing its proprietary drug candidate ITCA 650 (DUROS continuous delivery of ... upon the successful completion of a 28-day phase 1b study of ITCA ... to evaluate the doses achieving the best results in the phase 1b ...
... DIEGO, Sept. 16 Aethlon Medical, Inc. (OTC Bulletin Board: AEMD), ... San Diego, California, the stockholders re-elected the incumbent four-person Board of ... ratified the appointment of Squar, Milner, Peterson, ... ending March 31, 2010; , approved ...
Cached Biology Technology:Rigel Announces Pricing of Public Offering of 13,000,000 Shares of Common Stock 2Intarcia Therapeutics, Inc. Commences Enrollment of ITCA 650 Phase 2 Study in Type 2 Diabetes 2Intarcia Therapeutics, Inc. Commences Enrollment of ITCA 650 Phase 2 Study in Type 2 Diabetes 3Aethlon Medical, Inc. Announces Annual Meeting Results 2Aethlon Medical, Inc. Announces Annual Meeting Results 3
Mouse monoclonal [B314.1 (MAC 387)] to Macrophage L1 protein Calprotectin (rating: ****) ( Abpromise for all tested applications)....
MOUSE ANTI HUMAN CYTOKERATIN 1-8...
Request Info...
... Polyoxyethylene Lauryl Ether 30% ... Kathon Preservative. Surfactant. Clear ... immunohistochemistry is 1 mL ... solution added to 400 ...
Biology Products: