Navigation Links
New Geology study raises questions about long-held theories of human evolution
Date:1/31/2013

ainforests had already disappeared by that pointreplaced by grasslands and seasonally dry forests some time before 12 million years ago.

In addition, the tropical C4-type grasses and shrubs of the modern African savannah began to dominate the landscape earlier than thought, replacing C3-type grasses that were better suited to a wetter environment. (The classification of C4 versus C3 refers to the manner of photosynthesis each type of plant utilizes.)

While earlier studies on vegetation change through this period relied on the analysis of individual sites throughout the Rift Valleyoffering narrow snapshotsFeakins took a look at the whole picture by using a sediment core taken in the Gulf of Aden, where winds funnel and deposit sediment from the entire region. She then cross-referenced her findings with Levin who compiled data from ancient soil samples collected throughout eastern Africa.

"The combination of marine and terrestrial data enable us to link the environmental record at specific fossil sites to regional ecological and climate change," Levin said.

In addition to informing scientists about the environment that our ancestors took shape in, Feakins' study provides insights into the landscape that herbivores (horses, hippos and antelopes) grazed, as well as how plants across the landscape reacted to periods of global and regional environmental change.

"The types of grasses appear to be sensitive to global carbon dioxide levels," said Liddy, who is currently working to refine the data pertaining to the Pliocene, to provide an even clearer picture of a period that experienced similar atmospheric carbon dioxide levels to present day. "There might be lessons in here for the future viability of our C4-grain crops," says Feakins.


'/>"/>

Contact: Robert Perkins
perkinsr@usc.edu
213-740-9226
University of Southern California
Source:Eurekalert

Page: 1 2

Related biology news :

1. GEOLOGY starts 2013 with 25 new articles posted online ahead of print
2. GEOLOGY returns to Naica Cave, Mexico, and extends its reach to Mercury
3. GEOLOGY speeding top science to online platform
4. GEOLOGY adds 30 new articles online
5. Geologys Mystery Interval, the Great Deepening, and the largest kill-off in Earth history
6. Geosphere: How geology, technology, modeling, and mapping see into Earths past and present
7. Sandy beaches, hydrocarbon reservoirs, tectonic tilting: Its all about geology
8. From 503-million-year-old fungi to recent earthquakes: New Geology posted ahead of print
9. Seismic zones, river deltas, landslides, fossil reptiles, and more new Geology science
10. New study highlights impact of environmental change on older people
11. UNC study may lead to treatments that are effective against all MRSA strains
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:10/25/2014)... 2014 Research and Markets  has announced ... 2014-2018" report to their offering. ... on the basis of their physical or behavioral patterns. ... traits such as fingerprints, face recognition, DNA, palm print, ... as keystroke patterns and speech pattern/voice recognition. ...
(Date:10/22/2014)... 21, 2014 Aware, Inc. (NASDAQ: AWRE ... reported financial results for its third quarter ended September 30, ... was $6.0 million, an increase of 40% compared to $4.3 ... the third quarter of 2014 was $4.1 million compared to ... income in the current three month period was primarily due ...
(Date:10/18/2014)... sample of patients with undiagnosed, suspected genetic conditions, a ... a higher molecular diagnostic yield than traditional molecular diagnostic ... . The study is being released to coincide with ... Exome sequencing, which sequences the protein­coding region of the ... present in a cell or organism), has been rapidly ...
Breaking Biology News(10 mins):Biometrics Market in Europe 2014-2018: Key Vendors are 3M Cogent, Cognitec, NEC and Safran 2Biometrics Market in Europe 2014-2018: Key Vendors are 3M Cogent, Cognitec, NEC and Safran 3Aware, Inc. Reports Third Quarter 2014 Financial Results 2Aware, Inc. Reports Third Quarter 2014 Financial Results 3Aware, Inc. Reports Third Quarter 2014 Financial Results 4Aware, Inc. Reports Third Quarter 2014 Financial Results 5Aware, Inc. Reports Third Quarter 2014 Financial Results 6Aware, Inc. Reports Third Quarter 2014 Financial Results 7Study examines type of exome sequencing and molecular diagnostic yield 2Study examines type of exome sequencing and molecular diagnostic yield 3
... MADISON Failing to see the forest for ... declining health of Wisconsin,s forest ecosystems. Even areas ... as forests are increasingly fragmented by roads and development, ... fields, housing tracts, and strip malls, say University of ...
... rings are acclaimed in representing natural climate archives. ... growth of these annual rings depend mainly on temperature ... slight seasonal variations, the correlation is not so ... for Geosciences and their colleagues of the Australian National ...
... Versartis, Inc., an emerging company developing novel biologics ... presented data for its long-acting product candidates, VRS-317 (hGH-rPEG) ... (IL-1ra-rPEG) for treatment of type 1 and type 2 ... DC. Versartis, through a unique licensing agreement with Amunix, ...
Cached Biology News:Isolated forest patches lose species, diversity 2Isolated forest patches lose species, diversity 3Australia's climate: Drought and flooding in annual rings of tropical trees 2Versartis presents positive preclinical data on 2 product candidates at ENDO 09 2
(Date:10/25/2014)... (PRWEB) October 24, 2014 This ... PHA, PBS, Starch Based Plastics, Regenerated Cellulose, PCL), ... Global Trends and Forecasts to 2019”, defines and ... analysis and forecast of its global volume and ... 54 Figures spread through 178 Slides and in-depth ...
(Date:10/25/2014)... SonaCare Medical, LLC, leader in ... announced that its Board of Directors has appointed ... President and member of the Board effective immediately. ... expanded responsibilities within the company, including further developing ... commercialization, manufacturing and finance. , Dr. Carol ...
(Date:10/25/2014)... 2014 Berkshire Corporation, the world ... announce the release of the ValuSeal® IonX™ cleanroom ... contamination containment in critical processing applications. , Recommended ... cleanroom environments, ValuSeal® IonX™ is a laser sealed ... that continues Berkshire’s innovative focus on meeting new ...
(Date:10/25/2014)... YORK , Oct. 24, 2014 ... Inc. (ACCP), a biopharmaceutical company advancing patient care ... 1-for-50 reverse split of its common stock effective ... 24, 2014. PlasmaTech,s common stock will trade on ... and temporary ticker symbol "ACCPD". After 20 days, ...
Breaking Biology Technology:Biodegradable Plastics Market Projected to $3,476.87 Million by 2019 - Report by MarketsandMarkets 2Biodegradable Plastics Market Projected to $3,476.87 Million by 2019 - Report by MarketsandMarkets 3Biodegradable Plastics Market Projected to $3,476.87 Million by 2019 - Report by MarketsandMarkets 4SonaCare Medical Board of Directors Appoints Dr. Mark Carol as CEO and President 2SonaCare Medical Board of Directors Appoints Dr. Mark Carol as CEO and President 3Ions Are Bygones, Berkshire Announces the Release of New Innovative Cleanroom Wipers 2PlasmaTech Biopharmaceuticals, Inc. Announces Reverse Stock Split, Ticker Change and Launches New Corporate Website 2
... , , , , Multiporator / Electroporator 2510 , , , , ... Transformation Protocol , Protocol No. 4308 915.509 12/2001 , ... , , , , ... , Cell type , Bacteria, gram positive, ...
... , , , , , , , , ... Protocol No. 4308 915.508 12/2001 , , , , , ... , Microorganism , Brucella abortus, ... Bacteria, gram negative, , , ...
... , , , , , , Multiporator / Electroporator 2510 , , ... , Transformation Protocol , Protocol No. 4308 ... , , , , , , ... , , Cell type , ...
Cached Biology Technology:Clostridium botulinum 2Brucella abortus 2Agrobacterium tumefaciens 2
Acetate Plate Sealers 100/Box...
QCPN...
... The new MALDI O-TOF creates a new ... an orthogonal platform that has been licensed ... University of Manitoba. , As the first ... design and collisional cooling, the prOTOF 2000 ...
Rat Aortic Endothelial Cells (RAOEC) (>500,000 cells)...
Biology Products: