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Box and whisker diagrams showing distribution of values generated by volunteers and ecologists on Buton Island, Indonesia for a number of trees counted per subplot, b median circumference-at-breast-height (CBH) values aggregated by subplot, c circumference-at-breast-height (CBH) values for individual trees. Box plots underscored by a ‘V’ indicate values generated by volunteers, while box plots underscored by an ‘E’ indicate values generated by ecologists
