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. 2018 Jul 11;8(3):29. doi: 10.3390/life8030029

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© 2018 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Extended error plot for taxonomic compositions at the genus level for Antarctic metagenomes used in this study was visualized through STAMP based on SEED subsystems. Total mean proportions in different categories are displayed in the left bar graph; the upper side (red) indicates the soil and lake sediment group (Lake Untersee sediment, Mount Seuss soil, and McMurdo Dry Valleys soil), and the lower side (blue) represents the water group (Lake Untersee water, Ace Lake water, Newcomb Bay Lake water). The colored circles (red and blue) show the 95% confidence intervals calculated using the Welch’s t-test [50] with no correction and default parameters.