how the Berber HG survived while EEF got extinct

I would be surprised if Berbers didn't have any EEF at all.
But after going through
https://www.researchgate.net/publica...hic_of_Morocco
Climate Induced Mobility and the Missing Middle Neolithic of Morocco.
my impression was that much of the Cardial Ware in Morocco faded away when the Green Sahara dissapeared, which must also have affected climate in the Atlas Mts.
I see my impression confirmed in the PCA of Fregel 2017.
The bulk of EEF which was there in the KEB samples has dissapeared.
It would be interesting to have pré-Islam Berber samples.
In the Laziridis 2018 paper you can see that Natufian is modelled as Dzudzuana + Taforalt, so the expansion was from Taforalt into the Levant and not the other way around.
The IAM in Fregel 2017 are Capsian, a E-L19 → M81 population that arrived in Algeria/Tunisia 10 ka and probably merged with the Iberomaurusian population.
1200px-Iberomaurisiense-Capsiense.png
I'm confused. So there was North African ancestry in Natufians? Iberomasurians are the natives of North Africa. Where did the IAM arrive from?
 

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