| Title |
Oldest Evidence of Toolmaking Hominins in a Grassland-Dominated Ecosystem
|
|---|---|
| Published in |
PLOS ONE, October 2009
|
| DOI | 10.1371/journal.pone.0007199 |
| Pubmed ID | |
| Authors |
Thomas W. Plummer, Peter W. Ditchfield, Laura C. Bishop, John D. Kingston, Joseph V. Ferraro, David R. Braun, Fritz Hertel, Richard Potts |
| Abstract |
Major biological and cultural innovations in late Pliocene hominin evolution are frequently linked to the spread or fluctuating presence of C(4) grass in African ecosystems. Whereas the deep sea record of global climatic change provides indirect evidence for an increase in C(4) vegetation with a shift towards a cooler, drier and more variable global climatic regime beginning approximately 3 million years ago (Ma), evidence for grassland-dominated ecosystems in continental Africa and hominin activities within such ecosystems have been lacking. |
X Demographics
The data shown below were collected from the profiles of 3 X users who shared this research output. Click here to find out more about how the information was compiled.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| United States | 1 | 33% |
| Unknown | 2 | 67% |
Demographic breakdown
| Type | Count | As % |
|---|---|---|
| Members of the public | 3 | 100% |
Mendeley readers
The data shown below were compiled from readership statistics for 185 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| United States | 5 | 3% |
| Canada | 2 | 1% |
| Switzerland | 1 | <1% |
| South Africa | 1 | <1% |
| United Kingdom | 1 | <1% |
| Spain | 1 | <1% |
| Romania | 1 | <1% |
| Unknown | 173 | 94% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Student > Ph. D. Student | 47 | 25% |
| Researcher | 24 | 13% |
| Student > Bachelor | 20 | 11% |
| Student > Master | 17 | 9% |
| Professor | 11 | 6% |
| Other | 40 | 22% |
| Unknown | 26 | 14% |
| Readers by discipline | Count | As % |
|---|---|---|
| Social Sciences | 42 | 23% |
| Agricultural and Biological Sciences | 41 | 22% |
| Arts and Humanities | 24 | 13% |
| Earth and Planetary Sciences | 15 | 8% |
| Environmental Science | 11 | 6% |
| Other | 22 | 12% |
| Unknown | 30 | 16% |