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[QUOTE]Originally posted by Cass/: [QB] [QUOTE]Originally posted by Oshun: [qb] Also...didn't he post this? If this is not tryna say that there were differing adaptions being made among people south of the Sahara I'm not sure how this is relevant to the conversation. Well, I grasp how he's trying to spin it, but it would still seem that the source he's trying to place here is making distinctions within SSA. SSA is very large and vast and has several ecosystems. It's ridiculous how he can try to insist grouping people as "SSA" but whines about the distance between north Africa to the Sahel. [/qb][/QUOTE]You don't know what you're posting. I'm talking about climatic adaptation (ecology), not genetic distance (biology). Example: the genetic distance between populations across Europe is small, so if you look at the geographical extremes (Fst 0.0084 Swedes ~ Greeks), southern & northern Europeans are genetically close. However, there are clearly two distinct [b][URL=https://en.wikipedia.org/wiki/Ecotype]ecotypes[/URL][/b] - the "Mediterranean" and the "Nordic". The main phenotypic differences between these is pigmentation (skin & eye* colour), not skeletal; according to 20th physical anthropologists (Coon, Hooton, Cole etc.) "Nordics" are "depigmented Mediterraneans". *"One reason why light eyes are geographically associated with dim light has been explained by the Nobel Prize winner George Wald. He found that blue- and gray-eyed people see more sharply over long distances than brown-eyed people do." (Coon, C. S. 1982. [i]Racial Adaptations[/i]. p. 66) [so the climatic selection argument here is light eye colouration is favoruable in northern Europe that receives the lowest annual UV/sunlight levels.] So my point about SSA is despite the much larger genetic distances between many populations there (10x what is observed in Europe), e.g. Fst 0.0851 Mbuti Pygmy ~ San (Cavalli-Sforza, 1994), that most of it has an ecotype adapted to the humid-heat (and high UV), the so-called "Negroid" with broad nose, black skin and dark eyes. As Roberts (1976) wrote in a book review of Jean Hiernaux's [i]People of Africa[/i] (1975), the ecotype classifications of Hiernaux closely match the old racial boundaries of Seligman: - "Thus lack of classification does not however prevent the presentation of the material by chapters which in earlier days would have had race headings... [b]essentially the same subdivisions as Seligman's [i]Races of Africa[/i][/b]." (Roberts, 1976 "African Physiques" [i]The Journal of African History[/i], 17(3): 445-447) Hence, I noted how Baker's (1974) "Negrid" [Negroid] map closely matches the Koppen climate classification for SSA, and Hiernaux (1975). [/QB][/QUOTE]
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