Dynamics of Green Sahara Periods and Their Role in Hominin Evolution
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Larrasoaña, Juan C.; Roberts, Andrew P.; Rohling, Eelco J.
Description
Astronomically forced insolation changes have driven monsoon dynamics and recurrent humid episodes in North Africa, resulting in green Sahara Periods (GSPs) with savannah expansion throughout most of the desert. Despite their potential for expanding the area of prime hominin habitats and favouring out-of-Africa dispersals, GSPs have not been incorporated into the narrative of hominin evolution due to poor knowledge of their timing, dynamics and landscape composition at evolutionary timescales....[Show more]
dc.contributor.author | Larrasoaña, Juan C. | |
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dc.contributor.author | Roberts, Andrew P. | |
dc.contributor.author | Rohling, Eelco J. | |
dc.date.accessioned | 2015-11-24T05:56:04Z | |
dc.date.available | 2015-11-24T05:56:04Z | |
dc.identifier.issn | 1932-6203 | |
dc.identifier.uri | http://hdl.handle.net/1885/16672 | |
dc.description.abstract | Astronomically forced insolation changes have driven monsoon dynamics and recurrent humid episodes in North Africa, resulting in green Sahara Periods (GSPs) with savannah expansion throughout most of the desert. Despite their potential for expanding the area of prime hominin habitats and favouring out-of-Africa dispersals, GSPs have not been incorporated into the narrative of hominin evolution due to poor knowledge of their timing, dynamics and landscape composition at evolutionary timescales. We present a compilation of continental and marine paleoenvironmental records from within and around North Africa, which enables identification of over 230 GSPs within the last 8 million years. By combining the main climatological determinants of woody cover in tropical Africa with paleoenvironmental and paleoclimatic data for representative (Holocene and Eemian) GSPs, we estimate precipitation regimes and habitat distributions during GSPs. Their chronology is consistent with the ages of Saharan archeological and fossil hominin sites. Each GSP took 2-3 kyr to develop, peaked over 4-8 kyr, biogeographically connected the African tropics to African and Eurasian mid latitudes, and ended within 2-3 kyr, which resulted in rapid habitat fragmentation. We argue that the well-dated succession of GSPs presented here may have played an important role in migration and evolution of hominins. | |
dc.publisher | Public Library of Science | |
dc.rights | © 2013 Larrasoaña et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. | |
dc.source | PLoS ONE | |
dc.subject | africa, northern | |
dc.subject | animals | |
dc.subject | climate | |
dc.subject | ecosystem | |
dc.subject | hominidae | |
dc.subject | phylogeography | |
dc.subject | rain | |
dc.subject | time factors | |
dc.subject | tropical climate | |
dc.subject | biological evolution | |
dc.title | Dynamics of Green Sahara Periods and Their Role in Hominin Evolution | |
dc.type | Journal article | |
local.description.notes | Imported from ARIES | |
local.identifier.citationvolume | 8 | |
dc.date.issued | 2013-10-16 | |
local.identifier.absfor | 040605 | |
local.identifier.ariespublication | f5625xPUB4515 | |
local.publisher.url | https://www.plos.org/ | |
local.type.status | Published Version | |
local.contributor.affiliation | Larrasoana, Juan, College of Physical and Mathematical Sciences, CPMS Research School of Earth Sciences, RSES General, The Australian National University | |
local.contributor.affiliation | Roberts, Andrew, College of Physical and Mathematical Sciences, CPMS Research School of Earth Sciences, RSES General, The Australian National University | |
local.contributor.affiliation | Rohling, Eelco, College of Physical and Mathematical Sciences, CPMS Research School of Earth Sciences, RSES General, The Australian National University | |
local.identifier.essn | 1932-6203 | |
local.bibliographicCitation.issue | 10 | |
local.bibliographicCitation.startpage | e76514 | |
local.bibliographicCitation.lastpage | 12 | |
local.identifier.doi | 10.1371/journal.pone.0076514 | |
local.identifier.absseo | 970104 | |
dc.date.updated | 2015-12-11T08:59:55Z | |
local.identifier.scopusID | 2-s2.0-84885749253 | |
local.identifier.thomsonID | 000326019400068 | |
dcterms.accessRights | Open Access | |
Collections | ANU Research Publications |
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