FIGURE 4.

Bacterial community composition in surficial and subsurface sediments at Family level. Here we reported Families responsible for differences between bacterial communities inside and outside the SWIR and between surficial and subsurface bacterial communities. Families were selected after PCA analysis carried out on Hellinger transformed dominant bacterial and archaeal taxa (i.e., OTU > 0.1%) comparing (i) 0–5 cm layer of A3–A3m versus all stations, (ii) 0–5 cm layer of stations inside SWIR (A1 and A2–A2m) versus outside SWIR stations (N0, N1, N2, and S0), and (iii) 0–5 cm layer of all stations versus subsurface layer of SWIR stations.