**Relationship between forest area and (a, b) number of plant species, (c, d) number of pollinator species and (e, f) total number of species.** Data for the radius with the highest correlation coefficients (Figure ) regarding the effects of forest area are shown. Left (**a**, **c**, **e**) and right figures (**b**, **d**, **f**) are based on data including exotic species and excluding associations with exotics, respectively. Code numbers next to the circles indicate study site codes, which are provided in Table . Lines represent linear regressions: (**b**) number of plant species (*PLS*), log(*PLS*) = 1.8062 + 0.8348*log(*FA*), *r*^{2} = 0.49, *F*_{1,5} = 4.77, *p* = 0.081; (**c**) number of pollinator species (*POS*), log(*POS*) = 4.3847 – 1.3624*log(*FA*), *r*^{2} = 0.63, *F*_{1,5} = 8.60, *p* = 0.033; (**d**) log(*POS*) = 2.6504 + 1.3926*log(*FA*), *r*^{2} = 0.58, *F*_{1,5} = 6.88, *p* = 0.047; (**e**) total number of species (*TS*), log(*TS*) = 4.5598 – 1.1211*log(*FA*), *r*^{2} = 0.51, *F*_{1,5} = 5.29, *p* = 0.070; (f) log(*TS*) = 3.0195 + 1.1740*log(*FA*), *r*^{2} = 0.56, *F*_{1,5} = 6.30, *p* = 0.054.

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