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by cmrdporcupine
2079 days ago
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My understanding of more recent European population studies is that the genetic signature of the pre-agrarian hunter gatherers is actually quite low. In general they were displaced rather than merged. Or their numbers were so low and diffuse that their contribution was little. Which makes sense when you consider population densities possible/typical in a hunter gatherer vs agrarian lifestyles. We're back to population migration / replacement theories being ascendant rather than the situation 30 years ago when cultural diffusion theories were preferred. |
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From https://www.nhm.ac.uk/our-science/our-work/origins-evolution...
"When we look at genetic variation in modern British people today, we find that – for those who do not have a recent history of migration – around 10% of their ancestry can be attributed to the ancient European population to which Cheddar Man belonged. This group is referred to as the western European Mesolithic hunter-gatherers. However, this ancestry does not relate specifically to Cheddar Man or the Mesolithic population of Britain. Well after Cheddar Man’s death, two large-scale prehistoric migrations into Britain produced significant population turnovers13. Both of these migrations into Britain represented westward extensions of population movements across Europe10-12. In both cases, these migrating populations intermixed with local people who carried western European Mesolithic hunter-gatherer ancestry, as they moved across Europe. When these populations arrived in Britain they already had some hunter-gatherer ancestry derived from this mixing with local populations. Therefore the majority of western European Mesolithic hunter-gatherers ancestry that we see in modern British people probably originates from populations who lived all over Europe during the Mesolithic, which was carried into Britain by these later migrations."