Fig. S1.
MDS (PROXCAL) plot of 14 archaeological layers based on the Chebychev distance calculated from the proportion of 36 plant species remains. Dispersion accounted for (i.e., variance explained) =0.99, and the stress (i.e., the degree of correspondence between the distances among points calculated by the MDS map and the input matrix) =0.0098. The dashed line denotes the 95% confidence ellipse.