Table 1. Results from PERMANOVA.

	Aphanius iberus		Gambusia holbrooki		Valencia hispanica
	R2	p-value	R2	p-value	R2	p-value
Permanova 1
Sample type	0.081	<0.001***	0.017	<0.001***	0.120	<0.001***
Location	0.497	<0.001***	0.486	0.005**	0.292	<0.001***
Sample type: Location	0.013	0.345	0.018	0.055	0.012	0.338
Permanova 2
Location (intestinal wall)	0.485	<0.001***	0.454	<0.001***	0.151	0.097
Location (digesta)	0.649	<0.001 ***	0.573	<0.001***	0.252	<0.001***

Notes.

The R2 value indicates how much of the variance is explained by a given covariate and level of significance with ** (p < 0.01) and *** (p < 0.001). Sample type: Location is the interaction between the two fixed explanatory factors.