Table 1.

The best-fit, zero-inflated, multiple beta regression models relating environmental variables to the proportion of visits contributed by the western honey bee (Apis mellifera) in plant–pollinator interaction networks worldwide (n = 79 networks where bioclimatic variables were available). (Temperature PC1 increases with overall temperature and isothermality, and decreases with temperature seasonality and annual range. Models examining the influence of A. mellifera native status and last year of study on proportion of visits by A. mellifera were constructed by adding these two variables to the best-fit model of environmental variables.)

model (ΔAICc)/variable	estimate	t value	p value
best-fit environmental model (BFEM) (ΔAICc = 0)	Cox–Snell R2 = 0.19
temperature PC1	μ = 0.39	4.24	<0.001
land category (mainland = 1, island = 0)	μ = 0.81	2.27	0.026
BFEM + Apis native status (ΔAICc = 1.39)	Cox–Snell R2 = 0.20
temperature PC1	μ = 0.41	4.31	<0.001
land category (mainland = 1, island = 0)	μ = 0.74	2.04	0.045
Apis native status (native = 1, introduced = 0)	μ = 0.31	0.99	0.33
BFEM + last study year (ΔAICc = 2.25)	Cox–Snell R2 = 0.19
temperature PC1	μ = 0.39	4.75	<0.001
land category (mainland = 1, island = 0)	μ = 0.81	2.26	0.026
last study year (years CE)	μ = 0.0056	0.31	0.76
BFEM + Apis native status + last study year (ΔAICc = 3.75)	Cox–Snell R2 = 0.20
temperature PC1	μ = 0.41	4.95	<0.001
Land category (mainland = 1, island = 0)	μ = 0.74	2.03	0.046
Apis native status (native = 1, introduced = 0)	μ = 0.30	0.96	0.34
last study year (years CE)	μ = 0.0041	0.23	0.82