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oai:recercat.cat:10256/75582024-06-14T09:36:19Zcom_2072_452955com_2072_2054col_2072_453063

Space Competition and Time Delays in Human Range Expansions. Application to the Neolithic Transition Isern Sardó, Neus Fort, Joaquim Vander Linden, Marc Equacions de reacció-difusió Reaction-diffusion equations Neolític -- Models matemàtics Neolithic period -- Mathematical models Space competition effects are well-known in many microbiological and ecological systems. Here we analyze such an effect in human populations. The Neolithic transition (change from foraging to farming) was mainly the outcome of a demographic process that spread gradually throughout Europe from the Near East. In Northern Europe, archaeological data show a slowdown on the Neolithic rate of spread that can be related to a high indigenous (Mesolithic) population density hindering the advance as a result of the space competition between the two populations. We measure this slowdown from a database of 902 Early Neolithic sites and develop a time-delayed reaction-diffusion model with space competition between Neolithic and Mesolithic populations, to predict the observed speeds. The comparison of the predicted speed with the observations and with a previous non-delayed model show that both effects, the time delay effect due to the generation lag and the space competition between populations, are crucial in order to understand the observations 2012-12 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/10256/7558 http://hdl.handle.net/10256/7558 eng info:eu-repo/semantics/altIdentifier/doi/10.1371/journal.pone.0051106 info:eu-repo/semantics/altIdentifier/eissn/1932-6203 Attribution 2.5 Spain http://creativecommons.org/licenses/by/2.5/es/ info:eu-repo/semantics/openAccess application/pdf Public Library of Science PloS ONE, 2012, vol. 7, núm. 12, p. e51106 Articles publicats (D-F)