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Estimated crop production attributed to animal pollination in four citrus groups and their cultivars: (a) lemons, (b) mandarins, (c) oranges and (d) grapefruits. Each density line and colour denotes different simulations (only 100 are shown) and cultivars, respectively. The vertical discontinuous lines show the median value for each cultivar, and the box plots show the values from 10,000 simulations per cultivar.
