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. 2015 Feb 10;6:64. doi: 10.3389/fmicb.2015.00064

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Copyright © 2015 Liu, Fu, Yang, Zhao, He 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) or licensor 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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The relationship between major bacterial taxa (taxonomy of sequences) and environmental factors. (A) RDA across all samples at the order level. (B) RDA targeting only freshwater samples at the order level. (C) RDA across all samples at the genus level (the top 20). (D) RDA targeting only freshwater samples at the genus level (the top 20). In the RDA targeting freshwater sites, seven environmental factors were analyzed as the others were essentially the same.