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Table 2 OTUs shared between birds and their burrow environments. Significance was determined by using Welch’s two-sample t test. Birds shared on average 4.6% (± 0.98) OTUs with deep burrow soil and did not share more with their own burrow environment than with a randomly chosen “away” burrow (p > 0.05)

From: Morphological and genetic factors shape the microbiome of a seabird species (Oceanodroma leucorhoa) more than environmental and social factors

Comparison Burrow soil site Test statistic t P value Burrow Mean % shared OTUs 95% CI n
Female uropygial gland Deep 0.135 0.894 Home 4.53 2.54 13
Away 4.59 2.24 13
Mid 0.667 0.513 Home 3.32 1.39 13
Away 3.33 1.43 13
Surface 0.008 0.994 Home 3.08 1.37 13
Away 3.15 1.58 13
Female brood patch Deep − 0.470 0.644 Home 5.25 1.94 14
Away 5.62 2.73 14
Mid − 0.404 0.691 Home 4.36 1.63 14
Away 4.07 1.43 14
Surface − 0.177 0.861 Home 3.81 1.26 14
Away 3.86 1.62 14
Male uropygial gland Deep 0.455 0.673 Home 3.79 1.63 8
Away 3.60 2.40 8
Mid − 0.748 0.489 Home 2.99 2.22 8
Away 3.05 2.22 8
Surface − 0.482 0.653 Home 2.53 1.57 8
Away 2.49 1.71 8
Male brood patch Deep − 0.238 0.820 Home 4.22 1.64 7
Away 3.63 1.57 7
Mid 0.342 0.748 Home 3.00 1.61 7
Away 3.07 1.63 7
Surface 0.457 0.667 Home 2.48 1.03 7
Away 2.61 1.22 7