Navigation Links
6 million years of African savanna
Date:8/4/2011

in the open grassland/savanna environments of East Africa," says H. Richard Lane, program director in NSF's Division of Earth Sciences.

Adds Kaye Reed of NSF's Division of Behavioral and Cognitive Sciences, "These investigators have done an amazing job of collecting modern comparative isotope and soil temperature samples to compare with paleosol [fossil soil] samples from hominin localities. Their newly developed method for calculating 'paleo-shade' is very innovative."

Cerling does not dispute that East African savannas became more expansive within the past two million years, or that human ancestors and relatives likely spent time in narrow "gallery forests" along river corridors.

But he says the new method shows that grasslands and wooded grasslands--savannas--have prevailed for more than six million years in the cradle of humanity, with tree cover less than about 40 percent at most sites.

By definition, woodland has more than 40 percent tree cover; forest has more than 80 percent tree cover.

"In some periods, it was more bushy, and other times it was less bushy," he says.

"Hardly anything could have been called a dense forest, but we can show some periods where certain environments were consistently more wooded than others.

"We find hominins in both places. How early hominins partitioned their time between 'more open' and 'more closed' habitats is still an open question."

Cerling says that even sparse woody canopy provided hominins with shade, some foods and refuge from predators.

Fossil evidence of hominins dates back 4.3 million years and possibly 6 million years, Cerling says. The new method was used to look for and find savanna up to 7.4 million years ago.

"Currently, many scientists think that before 2 million years ago, the region was forested, and that savanna conditions have been present only for the past 2 million years," Cerling says. "This study shows that during
'/>"/>

Contact: Cheryl Dybas
cdybas@nsf.gov
703-292-7734
National Science Foundation
Source:Eurekalert  

Page: 1 2 3 4 5

Related biology news :

1. 6 million years of savanna
2. $3 million grant to aid minorities with uncontrolled diabetes
3. CWRU receives $2.1 million NIH grant to expand cystic fibrosis research models
4. BUSM awarded $9 million to investigate treatment for sickle cell disease using iPS cells
5. 96-million-year-old fossil suggests prehistoric crocodile Terminonaris was Texas native
6. SPO Secures Equity Line Facility of US$5 Million
7. NSF sponsors $18.5 million effort to create mind-machine interface
8. Johns Hopkins researchers awarded $32 million
9. Gladstone to receive $5.6 million in federal funds to seek a cure for AIDS
10. UTMB-led researchers awarded $7.8 million for Gulf spill study
11. NIH awards $17 million Program of Excellence Award in glycosciences to Brigham and Womens Hospital
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
6 million years of African savanna
(Date:3/23/2015)... , March 23, 2015 SoundView Technology Group ... NXT-ID,s (NASDAQ: NXTD ) Wocket smart wallet. SoundView was one ... feedback on their experience with the Wocket in multiple scenarios ... CVS, Whole Foods and other retailers, making both debit and ... Tuttle also says, "If the company meets their plans ...
(Date:3/20/2015)... and Markets ( http://www.researchandmarkets.com/research/rswjb4/hand_geometry ) has announced the ... Report" report to their offering. This report ... The report provides separate comprehensive analytics for the US, ... Europe , Asia-Pacific , ... Annual estimates and forecasts are provided for the period ...
(Date:3/17/2015)... , March 17, 2015 MedNet ... specializing in clinical study management systems, is pleased ... attendance at ARENA,s Outsourcing in Clinical Trials Southeast ... event provides an excellent forum for MedNet to ... and affordable software-as-a-service (SaaS) eClinical technology platform. ...
Breaking Biology News(10 mins):Technology Research Note Update from SoundView; Real-World Usage and Feedback of Wocket Smart Wallet at CVS, Whole Foods and other Retailers 2Technology Research Note Update from SoundView; Real-World Usage and Feedback of Wocket Smart Wallet at CVS, Whole Foods and other Retailers 3Technology Research Note Update from SoundView; Real-World Usage and Feedback of Wocket Smart Wallet at CVS, Whole Foods and other Retailers 4Hand Geometry - Global Strategic Business Report 2015: An Essential Security Component for both Government & Enterprise Sector 2Hand Geometry - Global Strategic Business Report 2015: An Essential Security Component for both Government & Enterprise Sector 3Hand Geometry - Global Strategic Business Report 2015: An Essential Security Component for both Government & Enterprise Sector 4Connect With MedNet Solutions At Outsourcing In Clinical Trials Southeast 2
... High Park Fire continues to expand and generate a lot ... showed winds from the west-southwest blowing the smoke to the ... 2012. The High Park Fire is located approximately 15 ... percent contained. To date, 189 homes have been lost, according ...
... to expand genetic screening programs for newborns, according to ... and political pressure by advocacy groups. Nearly ... prick within days of birth for a simple blood ... mandatory newborn screening programs have focused on disorders such ...
... of Medicine (BUSM) have demonstrated in experimental models that ... eating and caused binge eaters to eat more slowly. ... , was led by Pietro Cottone, PhD, and Valentina ... psychiatry departments at BUSM. Binge eating disorder, which ...
Cached Biology News:Parents seen as critical stakeholders in expanding newborn screening 2Parents seen as critical stakeholders in expanding newborn screening 3Parents seen as critical stakeholders in expanding newborn screening 4BUSM study shows role of cellular protein in regulation of binge eating 2
(Date:4/1/2015)... and NEW YORK ... Inc. (NASDAQ:  PTBI), a biopharmaceutical company advancing protein ... provided an overview of the Company,s 2014 achievements ... achievements below demonstrate the progress the Company has ... multiple corporate partnerships for its MuGard programs, the ...
(Date:4/1/2015)... NEW YORK CITY and LONDON ... of market research reports and solutions, MarketResearch.com is pleased to ... will be a year of market growth and opportunity for ... stem cell company or cord blood bank, competing in the ... market conditions, predict industry trends, and act on market changes ...
(Date:4/1/2015)... Immunocore Limited ("the Company"), ... to treat cancer, viral infections and autoimmune disease, ... Christina Coughlin as Chief Medical Officer. ... and regulatory leadership to the pre-clinical and clinical ... has extensive experience in oncology drug development, with ...
(Date:3/31/2015)... 31, 2015 Eastern Kentucky University ... online bachelor’s of criminal justice degree programs by ... to inspiring ideas and high quality educational opportunities,” ... the University. We are confident that students will ... This is the site’s first “Students before Profits” ...
Breaking Biology Technology:PlasmaTech Biopharmaceuticals Provides Strategic Update for 2015 and Review of 2014 Acheivements 2PlasmaTech Biopharmaceuticals Provides Strategic Update for 2015 and Review of 2014 Acheivements 3PlasmaTech Biopharmaceuticals Provides Strategic Update for 2015 and Review of 2014 Acheivements 4PlasmaTech Biopharmaceuticals Provides Strategic Update for 2015 and Review of 2014 Acheivements 5PlasmaTech Biopharmaceuticals Provides Strategic Update for 2015 and Review of 2014 Acheivements 6MarketResearch.com: "Blockbuster" Year for Stem Cells Creates Market Opportunities, Says BioInformant Worldwide Report 2MarketResearch.com: "Blockbuster" Year for Stem Cells Creates Market Opportunities, Says BioInformant Worldwide Report 3MarketResearch.com: "Blockbuster" Year for Stem Cells Creates Market Opportunities, Says BioInformant Worldwide Report 4Immunocore Appoints Dr. Christina Coughlin as Chief Medical Officer 2Immunocore Appoints Dr. Christina Coughlin as Chief Medical Officer 3Immunocore Appoints Dr. Christina Coughlin as Chief Medical Officer 4EKU Ranked in Top 50 Among Online Criminal Justice Degrees 2
... The Kansas Bioscience,Authority has launched a $2.5 ... create products that protect Americans from the,intentional ... national economy or,to infect humans., The ... Initiative,(CBRI) are to support interinstitutional research to: ...
... Jan. 15 Premier Research Group plc ... the,appointment of Patrick Melvin as Senior Director, ... this position, Mr. Melvin,will play a leading ... development of Premier Research,s growing portfolio of ...
... Inc.,(CTI) (Nasdaq: CTIC ; MTAX: CTIC) announced today ... new common shares. This share issue will equate to,approximately ... to close on Wednesday, January 16, and to raise ... Societe Generale,pursuant to the Step-Up Equity Financing Agreement entered ...
Cached Biology Technology:Collaborative Biosecurity Research Initiative Launched to Target Animal and Public Health Threats Nationally 2Collaborative Biosecurity Research Initiative Launched to Target Animal and Public Health Threats Nationally 3Premier Research Names Patrick Melvin as Senior Director, Clinical Trial Management 2Cell Therapeutics, Inc. (CTI) Prices $1.27 million (euros 856.000) Offering of Common Stock through Societe Generale 2
12(S)-HETE-d8 is used as an internal standard for the quantification of 12(S)-HETE by stable isotope dilution mass spectrometry....
...
... contains 4 deuterium atoms at the 9, 10, ... use as an internal standard for the quantification ... is produced by the lipoxygenation of linoleic acid ... detected in atherosclerotic plaques, as an esterified component ...
15(S)-HETE-d8 is used as an internal standard for the quantification of 15(S)-HETE by stable isotope dilution mass spectrometry....
Biology Products: