Effect of Freeze-Thaw on a Midtemperate Soil Bacterial Community and the Correlation Network of Its Members

Figure 3

Principal Component Analysis (PCA) of predicting functional profiles (KOs) across all soil samples. KOs with relatively higher vector lengths are arrowed. Ellipses are colored by different conditions (red: amplitudes; dashed line: frequency of freeze-thaw cycle; blue: soil water contents) and drawn for each condition with a confidence limit of 0.99.