Fig 1.
Soil sampling locations in Terra Nova Bay, Antarctica.
Fig 2.
Clustering of soil samples based on environmental variations.
Fig 3.
Clustering pattern of soil samples based on bacterial phyla composition.
Open and closed circles represent upper and lower soil layers, respectively. The dendrogram on the top was generated using the Bray-Curtis dissimilarity of phyla abundances between samples.
Fig 4.
NMDS plot of community composition at the phylum level.
Relative abundances of (A) Chloroflexi and (B) Cyanobacteria are indicated by different-sized circles. Only significant environmental variables were overlaid onto the ordination space.
Fig 5.
Community composition at the OTU-level.
(A) Unconstrained (NMDS) and (B) constrained (db-RDA) ordinations. Highly correlated and significant environmental variables were overlaid onto the NMDS space. Soil pH was linearly correlated with the ordination space using ordisurf.
Table 1.
Correlations between bacterial community structure and environmental variables.