Fig. 3: Situating the Pacific/ISEA calculus samples within known ancient dental calculus microbial diversity.
From: Exploring the potential of dental calculus to shed light on past human migrations in Oceania
A PCA of Pacific/ISEA calculus samples with ancient dental calculus from additional geographic regions. The additional samples are the same as those in Fig. 1B. B The distance to the centroid of all samples in the PCA, test by ANOVA *** p = 0.001, with Tukey’s Honest Significant Differences; values for groups with < 3 samples should be considered unreliable. Boxes show data median, interquartile range (25th-75th percentile) and whiskers indicate minimum and maximum values. C The number of species in each sample, ordered by PC1 loading, and coloured by the percentage of total reads in the sample that were assigned taxonomy. The trend line is fit with a generalized linear model. D FAVA values of variance in microbial composition between samples grouped by continent. Dotted line indicates the FAVA value of all samples not separated by continent.
