Navigation Links
6 million years of savanna
Date:8/3/2011

] open conditions were present," even predominant.

Cerling conducted the study with biologists Samuel Andanje and David Kimutai Korir of the Kenya Wildlife Service; geologist Michael Bird of James Cook University, Cairns, Australia; University of Utah graduate students William Mace of geology, Anthony Macharia of geography and Christopher Remien of mathematics; and former Utah geology graduate students Jonathan Wynn of the University of South Florida, Naomi Levin of Johns Hopkins University and Jay Quade of the University of Arizona.

The National Science Foundation and the Leakey Foundation funded the study.

Deducing Prehistoric Tree Cover from Soil Isotopes

The new method was developed by correlating carbon isotope ratios in 3,000 modern soil samples with satellite photos of tree and vegetation cover at 75 tropical sites worldwide half in Africa representing everything from closed forest to open grassland. That allowed scientists to determine the percent of tree and woody shrub cover millions of years ago based on carbon isotope ratios in fossil soils known as paleosols.

"This study is based on the geological axiom that the present is the key to the past," says Cerling. "We assume soils in the past had similar relationships to vegetation as what we observe today."

The researchers collected soil samples at Kenyan and Ethiopian sites and used published data on soil samples collected by others during the past decade at the other sites throughout the tropics. Modern soil samples came from national parks and reserves and non-agricultural areas so that carbon isotope rations reflected natural vegetation.

The ratio of rare carbon-13 to common carbon-12 in decayed plant material in soils reveals the extent to which the landscape was covered by plants that use what is known as the C3 pathway of photosynthesis versus plants that use C4 photosynthesis.

Trees, shrubs, herbs, forbs and cool-seas
'/>"/>

Contact: Lee Siegel
lee.siegel@utah.edu
801-581-8993
University of Utah
Source:Eurekalert  

Page: 1 2 3 4 5

Related biology news :

1. $3 million grant to aid minorities with uncontrolled diabetes
2. CWRU receives $2.1 million NIH grant to expand cystic fibrosis research models
3. BUSM awarded $9 million to investigate treatment for sickle cell disease using iPS cells
4. 96-million-year-old fossil suggests prehistoric crocodile Terminonaris was Texas native
5. SPO Secures Equity Line Facility of US$5 Million
6. NSF sponsors $18.5 million effort to create mind-machine interface
7. Johns Hopkins researchers awarded $32 million
8. Gladstone to receive $5.6 million in federal funds to seek a cure for AIDS
9. UTMB-led researchers awarded $7.8 million for Gulf spill study
10. NIH awards $17 million Program of Excellence Award in glycosciences to Brigham and Womens Hospital
11. Parkinsons Disease Foundation announces $1 million for novel studies into Parkinsons
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
6 million years of savanna
(Date:12/19/2014)... Research and Markets ( http://www.researchandmarkets.com/research/8kmfcn/iphone_5s ... "iPhone 5S Fingerprint Sensor - Apple/AuthenTec TMDR92 & ... offering. http://photos.prnewswire.com/prnh/20130307/600769 ... July 2012, Apple introduced the fingerprint reading feature ... only device of Apple incorporating such a feature, ...
(Date:12/19/2014)... --Research and Markets ( http://www.researchandmarkets.com/research/86ncd6/micro_market ) has ... North America Perimeter Security Systems Market" report to ... The North American perimeter security market is ... 2014 to 2019. Although the U.S. market holds a ... is expected to grow at a higher CAGR ...
(Date:12/19/2014)... , Dec. 18, 2014  23andMe, Inc., the leading ... study that pinpoints fine-scale differences in genetic ancestry of ... . Since immigrants first arrived more than ... has served as a meeting place for ... history and the ongoing mixing of peoples with African, ...
Breaking Biology News(10 mins):iPhone 5S Fingerprint Sensor - Apple/AuthenTec TMDR92 & Sapphire - Technology Report 2Micro Market Monitor: North America Perimeter Security Systems Market (Intrusion Detection Sensor, Video Surveillance, Communication/Alarm and Notification, Access Control System) 2Micro Market Monitor: North America Perimeter Security Systems Market (Intrusion Detection Sensor, Video Surveillance, Communication/Alarm and Notification, Access Control System) 323andMe Study Sketches Genetic Portrait of the United States 223andMe Study Sketches Genetic Portrait of the United States 323andMe Study Sketches Genetic Portrait of the United States 4
... , Sept. 4, 2013  Rapid growth in microRNA (miRNA) ... its diagnostic and therapeutic potential, has fuelled development ... Of the various miRNA technologies, which include quantitative ... functional tools, qRT PCR remains the fastest-growing, while ...
... . Families of thousands of victims of ... appropriate punishment, because of a suite of technologies able ... graves, perhaps hundreds of thousands remain undiscovered. Researchers at ... Ridge National Laboratory are developing a method to discover ...
... pleased to announce that the 2014 HFSP Nakasone Award ... Institute of Science for his pioneering work in discovering ... single most important foundation of the field of systems ... of genetic circuits to systematic analysis and understanding. ...
Cached Biology News:Frost & Sullivan: Diagnostic and Therapeutic Potential of microRNAs Stimulate Need for More Research Tools 2Frost & Sullivan: Diagnostic and Therapeutic Potential of microRNAs Stimulate Need for More Research Tools 3Frost & Sullivan: Diagnostic and Therapeutic Potential of microRNAs Stimulate Need for More Research Tools 4September 2013 story tips 2September 2013 story tips 3The 2014 HFSP Nakasone Award goes to Uri Alon 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)... MA (PRWEB) December 19, 2014 Charm ... MRLAFMQ test for the Detection of Aflatoxin M1 in ... to receive independent third party validation. The peer reviewed ... Unit of the Institute for Agricultural and Fisheries Research ... Group. , Aflatoxin B1, the most toxic aflatoxin ...
(Date:12/19/2014)... BioPlus Specialty Pharmacy (BioPlus), ... promotion of Nick Maroulis, Pharm.D. to the newly created ... , In this position, Dr. Maroulis will continue to ... directors of our multi-site pharmacies as the company expands. ... during that time he has served in many different ...
(Date:12/19/2014)... EVANSTON, Ill. , Dec. 19, 2014 ... to develop novel drugs for diseases of the central ... Ph.D., president and chief executive officer, will present at ... Dr. Riedel,s presentation will take place at 3:00 p.m. ... St. Francis in San Francisco, Calif. ...
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 3Charm Sciences Achieves Independent Validation of First 15 Minute Quantitative Screening Method for Aflatoxin M1 2BioPlus Specialty Pharmacy Promotes Dr. Nick Maroulis to Vice President of Specialty Pharmacy Services 2Naurex to Present at 33rd Annual J.P. Morgan Healthcare Conference 2
... non-profit arm the SBC Foundation, has given $285,500 in ... Milwaukee has reported. , ,Twenty-four organizations that ... received money to help them use more technology. The ... which typically gives from $2,500 to $25,000 per organization. ...
... secretary of Wisconsins Department of Commerce, said on Friday that he ... partner in the law firm Quarles & Bradys Milwaukee office. , ... two years. He will be returning to the firm he worked ... deal from Governor Doyle as a leader, a boss, and a ...
... Having judged last years a success, the Wisconsin ... the second annual Wisconsin Governor's Business Plan Contest ... businesses will submit 250-word business proposals within one of ... business services. The proposals will be accepted until January ...
Cached Biology Technology:Secretary Nettles leaving Commerce for law practice 2Secretary Nettles leaving Commerce for law practice 3Governors business-plan competition starts another round 2Governors business-plan competition starts another round 3
... The SPD101B is a no-frills, basic SpeedVac ... Although economically priced, this unit still features ... a digitial display of time and heat. ... samples and accepts a wide variety of ...
Digital display of time, vacuum and temperature , Dual vacuum control of ramping rate and ultimate level , Comes complete with RH40-12 (40 x 1.5 ml) Rotor and (2) Glass Condensation Flasks. ...
... The DNA120 is a dedicated concentrator for ... precipitates of DNA/RNA. The integrated system combines ... pump. The compact design, automatic pump and ... run time; one for heater time), makes ...
For absolute protein quantification. 4 peptides in 5 vials x 2 nmol per peptide...
Biology Products: