Fig. 2. Relation between the proportion of species represented by single specimens (IC) and the number of specimens collected during a survey. Solid circles indicate studies that collected bees from all plants within an area; open circles indicate studies that collected bees at a single flowering plant species within an area. The line is the pooled least-squares regression from ANCOVA, Y = 0.312 +(-2.038 (10)^-5)X.