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. 2022 Jan 6;12:771527. doi: 10.3389/fmicb.2021.771527

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Copyright © 2022 Du, Chen, Liu, Fu, Lin, Lin, Li, Qu and Ji.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Gene functional categories based on 16S RNA in the gut microbiota at top (A), second (B), and third (C) levels of relative abundance, and the Venn diagram of functional gene between the oral and cloacal samples (D). LDA scores reflect the differences in relative abundance among eight groups of microbiota samples (E). Each color in a plot indicates one gene function. Detailed descriptions are shown on the right side of each plot. The colors for others in Plots B and C indicate all other gene functions not listed in these two plots. See Figure 1 for the definition of every group.