TABLE 2.

Likelihood ratio test statistics^a

Diversity variable	Protocol		Population		Interaction
	χ2 df = 2	P value	χ2 df = 1	P value	χ2 df = 2	P value
Class richness	8.469	0.015	0.306	0.580	0.878	0.645
Class evenness	0.051	0.975	0.043	0.835	4.324	0.115
Species richness	5.354	0.069	0.230	0.631	5.658	0.059
Species evenness	4.095	0.129	2.243	0.134	11.175	0.004
Phylogenetic diversity	8.642	0.013	0.066	0.798	7.195	0.027

^aLikelihood ratio test (LRT) statistics with degrees of freedom (df) and P values for tests of effects of DNA isolation protocol, stickleback population, and interaction between the two. LRTs were conducted by comparing linear mixed models either including or excluding these fixed effects, plus random effects of fish and fish nested within family (see Materials and Methods). Tests with P values of <0.05 are shown in boldface type.