Table 1.

Summary of mixed model ANOVAs testing for the effects of nectar yeasts on the temperature excess of nectar (ΔT_nect) and air inside the flower (ΔT_flow), in relation to the temperature of the air immediately outside the floral perianth (figure 1a). In experiment 1, the ‘yeasts’ effect refers to the comparison of flowers exposed to pollinator visitation (control) with flowers from which yeasts had been excluded (treatment). In experiment 2, yeasts effect refers to the comparison between virgin flowers that opened inside pollinator exclosures (control) and virgin flowers whose nectaries had been inoculated with yeasts (treatment). The site effect in experiment 1 refers to differences between study sites (Las Navillas and Puerto Llano). Experiment 2 was performed only at Puerto Llano.

	dependent variable
	ΔTnect = Tnect − Tair			ΔTflow = Tflow − Tair
effect	d.f.	F	p	d.f.	F	p
experiment 1
yeasts	1,229	112.21	<0.0001	1,229	10.02	0.0018
site	1,15	16.00	0.0012	1,15	27.72	<0.0001
yeasts × site	1,229	7.04	0.0085	1,229	0.42	0.52
experiment 2
yeasts	1,132	42.52	<0.0001	1,132	8.17	0.0049