Table 1. Summary of the mixed linear models fitted for the proportion of seed removed by invertebrates, vertebrates and proportion of total seed removal due to invertebrates in relation to absolute latitude.

Response variable	Explicative variables	Parameter	p-values	R2 fixed terms	R2 Within site
Proportion of seed removed by invertebrates.	Intercept	−1.770	0.003
	Absolute latitude	−0.067	<0.001
	Log seed mass	−0.010	0.963
				0.185	0.613
Proportion of seed removed by vertebrates	Intercept	−5.579	<0.001
	Absolute latitude	0.041	0.029
	Log seed mass	0.016	0.948
				0.076	0.479
Proportion of total seed removal due to invertebrates	Intercept	2.539	<0.001
	Absolute latitude	−0.075	<0.001
	Log seed mass	−0.150	0.470
				0.246	0.578

The best models according to the AIC criteria included Log of seed mass in all the cases.