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. 2021 Jun 4;8:679368. doi: 10.3389/fvets.2021.679368

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Copyright © 2021 Wang, Zhou, Tang, Zeng, Gong, Wu and Li.

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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Co-occurrence networks of microbial communities based on Spearman correlation analysis sorted in color by operational taxonomic unit (OTU) level. A connection stands for a very strong (Spearman's R > 0.6) and significant [false discovery rate (FDR)-adjusted P < 0.05] correlation. The size of each node is proportional to the relative abundance; the thickness of each connection between two nodes is proportional to the value of Spearman's correlation coefficients. Red lines represent significant positive correlations, and green lines denote negative correlations.