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. 2018 Jul 26;9:1691. doi: 10.3389/fmicb.2018.01691

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Copyright © 2018 Song, Peng, Zeng, Du, Peng, Xu, Chen and Zhang.

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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Ordination plots of the results from the redundancy analysis (RDA) to identify the relationships among the microbial taxa (blue arrows) and environmental factors (red arrows). These are the abbreviation of microbial taxa: Actinobacteria (Actinobc), Alphaproteobacteria (α-proteo), Acidobacteria (Acidobac), Deltaproteobacteria (δ-proteo), Chloroflexi (Chlorofl), Thaumarchaeota (Thaumarc), Nitrospirae (Nitrospr), Bacteroidetes (Bacteroi), Gemmatimonadetes (Gemmatim), Latescibacteria (Latescib), Verrucomicrobia (Verrucom), and Firmicutes (Frimicut); the abbreviation of environmental factors: the location of the plots (Y), total phosphorus (TP), available phosphorus (AP); elevation (Elev), Shannon index (Shannon), plant density (Den). Each vector points to the direction of increase for a given microbial phylum and its length indicates the strength of the correlation between the variable and the ordination scores.