Table 3.

Effect of individual identity, clutch identity, and breeding colony on FM divergence in juvenile barn swallows.

	Within vs. among individuals				Within vs. among nests
	Observed diff.	95% CI range	p	Cliff’s d	Observed diff.	95% CI range	p	Cliff’s d
OTUs: weighted UniFrac	0.027	-0.002~0.025	0.023	0.159	0.022	-0.007~0.012	0.001	0.142
OTUs: unweighted UniFrac	0.005	-0.013~0.015	0.323	0.011	0.022	-0.015~0.007	<0.001	0.144
OTUs: Bray–Curtis	0.07	0.004~0.057	0.006	0.236	0.064	-0.015~0.02	<0.001	0.22
OTUs: Jaccard	0.003	-0.008~0.011	0.37	0.018	0.03	-0.008~0.006	<0.001	0.237
KEGGs: Bray–Curtis	0.004	-0.002~0.014	0.684	0.042	0.016	-0.003~0.009	0.001	0.184
	Within vs. among localities
	Observed diff.	96% CI range	p	Cliff’s d
OTUs: weighted UniFrac	0.002	-0.004~0.003	0.101	0.017
OTUs: unweighted UniFrac	0.013	-0.004~0.004	<0.001	0.083
OTUs: Bray–Curtis	0.026	-0.006~0.006	<0.001	0.084
OTUs: Jaccard	0.009	-0.002~0.003	<0.001	0.094
KEGGs: Bray–Curtis	-0.003	-0.002~0.002	0.977	-0.028

Results of permutation-based tests comparing dissimilarity among juvenile FM samples collected from (A) the same vs. different individuals in the same nest, (B) different individuals from the same vs. different nests located in the same breeding colony, and (C) individuals from different nests in the same vs. different breeding colony. For OTU data, analyses were run on four dissimilarity index types (weighted and unweighted UniFrac, Bray–Curtis and Jaccard). Only Bray–Curtis dissimilarity was used for predicted KEGG categories. Shown are observed dissimilarity difference values, 95% confidence intervals of permutation-based null distribution, permutation-based probability values and effect size estimates (Cliff’s d). Significant results are in boldface.