Climate forcing and Neanderthal extinction in Southern Iberia: insights from a multiproxy marine record |
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| Institution: | 1. Department of Plant Biology (Botany Area), Faculty of Biology, University of Murcia, Campus de Espinardo, 30100 Murcia, Spain;2. Centro Nacional de Investigación sobre la Evolución Humana (CENIEH), Paseo Sierra de Atapuerca 3, 09002 Burgos, Spain;3. Area de Prehistoria, Universitat Rovira I Virgili (URV), Avinguda de Catalunya 35, 43002 Tarragona, Spain;4. IPHES, Institut Catala de Paleoecologia Humana I Evoluci o Social, C/Marcel.lí Domingo s/n - Campus Sescelades URV (Edifici W3), 43007 Tarragona, Spain;5. Department of Agricultural Science and Technology, Polytechnic University of Cartagena, 30203 Cartagena, Spain;6. Department of Prehistory, Archaeology, Ancient History, Medieval History and Historiography, University of Murcia, 30071 Murcia, Spain;7. The Gibraltar Museum, 18-20 Bomb House Lane, P.O. Box 939, Gibraltar;8. Palaeolithic Archaeology Unit, The Gibraltar Museum, 18-20 Bomb House Lane, Gibraltar;9. School of Archaeology, University of Oxford, Hayes House, 75 George Street, Oxford OX1 2BQ, United Kingdom;10. Gibraltar Caves Project, The Gibraltar Museum, 18-20 Bomb House Lane, Gibraltar;11. Department of Earth Sciences, Faculty of Experimental Sciences, University of Huelva, Campus del Carmen, Av. Tres de Marzo s/n, 21071 Huelva, Spain |
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| Abstract: | Paleoclimate records from the western Mediterranean have been used to further understand the role of climatic changes in the replacement of archaic human populations inhabiting South Iberia. Marine sediments from the Balearic basin (ODP Site 975) was analysed at high resolution to obtain both geochemical and mineralogical data. These data were compared with climate records from nearby areas. Baexcces was used to characterize marine productivity and then related to climatic variability. Since variations in productivity were the consequence of climatic oscillations, climate/productivity events have been established. Sedimentary regime, primary marine productivity and oxygen conditions at the time of population replacement were reconstructed by means of a multiproxy approach. Climatic/oceanographic variations correlate well with Homo spatial and occupational patterns in Southern Iberia. It was found that low ventilation (U/Th), high river supply (Mg/Al), low aridity (Zr/Al) and low values of Baexcess coefficient of variation, may be linked with Neanderthal hospitable conditions. We attempt to support recent findings which claim that Neanderthals populations continued to inhabit southern Iberia between 30 and ～28 ky cal BP and that this persistence was due to the specific characteristics of South Iberian climatic refugia. Comparisons of our data with other marine and continental records appear to indicate that conditions in South Iberia were highly inhospitable at ～24 ky cal BP. Thus, it is proposed that the final disappearance of Neanderthals in this region could be linked with these extreme conditions. |
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