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Multidimensional scaling plots of 16S rRNA gene amplicon sequencing data. NMDS ordination showing 99% confidence interval ellipses of non-PMA-treated (left panels) and PMA-treated (right panels) grouped based on surface material (A) and site categories (B). The various samples collected from across the Analog habitat are indicated by dots, and the closer the dots are to each other, the more similar their bacterial composition is in terms of types and number of bacteria.
