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Distance from Africa, not climate, explains within-population phenotypic diversity
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[QUOTE]Originally posted by lamin: [QB] What is the title of the paper: The title is "The effect of [b]ancient[/b] population [b] bottlenecks[/b] on human [b] phenotypic[/b] variations. So if [b] ancient bottlenecks[/b] why limit the study to crania no more than 2,000 years old? We know that in the last 2,000 years worldwide there have been significant population movements which would mean some amount of transpopulation genetic exchange. Think of Genghis Khan and his cohorts expanding into Europe proper all the way from Central Asia. Think too of the Northern European barbarians invading Rome and elswhere in Europe. The European crusades into West Asia, the Turkish invasions into North Africa and Europe all led to new population transfers and genetic exchange, etc. The Multiregional hypothesis pushed by researchers like Wolpoff et al.[1992] and others is based mainly on physical anthropological data rather than DNA analysis. It has very few adherents these days--except those who want to establish great genetic distance between the so-called races. Note that the authors of the paper speak of [b] ancient bottlenecks[/b] which would mean populations that have bootlenecked off a parent population and have multiplied mainly among themselves in relative isolation. I stated that the hypothesis of the paper would be at variance with this because in the last 2,000 years--on account of wars and invasions--across the Eurasian plains and along the north-south latutudes of Europe and elsewhere, old bootlenecked populations would have experienced much commingling with other populations. Note too that blog exchanges such as those ES, etc. only require the quick exchange of ideas without the citing of references--which would be more appropriate for specialist academic blog sites. Which is not to deny that references are sometimes useful when there is some clear point of dispute. It looks like the title of the article does not reflect its contents. [/QB][/QUOTE]
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