Table 1.
Sample X-Ray diffraction mineral identification and percent composition in the serpentine rock core taken at the Khalilovsky massifa.
Fig 1.
SEM of Khalilovsky massif serpentine rock core samples collected at (A) 0.1 m, (B) 3.1 m and (C) 6.85 m in depth.
Fig 2.
Comparative analysis of mineral- and aqueous-associated serpentine-hosted bacterial communities according to Phylum.
(A) Community profiles of the Khalilovsky massif compared to those associated with serpentine minerals in other terrestrial environments. (B, C) Profiles of selected aqueous-associated planktonic communities from (B) terrestrial environments and (C) seawater serpentine- and ultramafic-hosted systems [24–32].
Fig 3.
A heat map of the bacterial genera found in serpentine rock core samples collected at different depths.
Colors indicate percent relative abundance of 74 genus level taxonomic groupings (i.e. 97% OTU sequence identity) that occur within the major phyla (each representing ≥0.5% of all OTUs) detected at different depths. Names of the most highly represented genera are given.
Fig 4.
Clustering analyses performed based on Bray-Curtis dissimilarity distances of prokaryotic OTU sequence abundance.
(A) A hierarchical cluster tree; and (B) principal coordinate analysis (PCoA) scatter plot. PCoA1 and PCoA2 explained 25.7% and 11.46% of the observed variation. Black and grey-colored circles indicate the depth of the microbial communities.