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Geographic distribution of olive as: (A) the observed distribution of olive in the Mediterranean Basin (red) superimposed on a shaded relief map with coloring based on satellite-derived land cover from Natural Earth (http://www.naturalearthdata.com/); and (B) map of FAO ecological zones (20) included in the domain of the analysis, with the histogram showing the proportion of the total olive area in A within the ecological zones. Color palette in B is from http://colorbrewer2.org/.
