Explore the geographic origins of our food crops – where they were initially domesticated and evolved over time – and discover how important these “primary regions of diversity” are to our current diets and agricultural production areas.
About the circular plots
The circular plots link the “primary regions of diversity” of crops (regions where crops were initially domesticated and evolved over long periods of time, and where the diversity of traditional crop varieties and related wild plants is especially high) with crops’ current importance in regional food supplies, measured in terms of calories (kcal/capita/day), protein (g/capita/day), fat (g/capita/day), and food weight (g/capita/day), and in regional agricultural production, measured in terms of total production quantity (tonnes), harvested area (ha), and gross production value (current million US$).
Each region has a color representing its own “native” crops and those colors are connected to other regions due the importance of those crops in the diets/agricultural production in other regions. The direction of the contribution is indicated by both the “native” region’s color and a gap between the connecting line and the consuming/producing region’s segment. The magnitude of contribution is indicated by the width of the connecting line. Because the line width is nonlinearly adapted to the curvature, it corresponds to the contribution size only at the start and end points. Regional food supply values (per capita/day) were formed by deriving a weighted average of national food supply values across countries comprising each region, with national values weighted by population. Regional production values were formed by summing national production values across countries comprising each region.