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(a) Monte Carlo LOESS regression models for palaeodietary trends for the Later Mesolithic of the Atlantic façade of Iberia. More marine protein in the diet causes enriched (less negative) δ13C values. (b) For comparison, an archaeological radiocarbon SPD population proxy for the region zoomed to the same time window. Simultaneous peak in population and the use of marine resources occurred around 7800 cal. BP. (Online version in colour.)
