Fig 4. Emergent correlation in food production and import.

(a) Example of a typical sub-tree from the MSF of the country-food production network for the year 2011. This sub-tree reflects the correlation in the food production among these countries, highlighted by the corresponding correlation matrix plot; (b) Example of a typical sub-tree from the MSF of country-food import network. The detected correlation in food importion among these specific countries is due to the fact that a large fraction of imports in these countries is comprised of three food commodities: maize, wheat and rice (see corresponding table).