Fig. 4

Taxonomic classification of the observed microbiome under each of the storage conditions separated by predominant sediment type. Sediment core separated by predominant composition; Top—Organic (brown bars), Middle—Carbonate (beige bars) and Bottom—Clay (grey bars). Onsite subsampling and sequencing (black borders), frozen subsamples taken onsite and later sequenced in the laboratory (blue borders) and core stored for 10 weeks at 4 °C prior to subsampling and sequencing (green borders). Error bars indicate standard error, n = 10. Asterisks indicate significant (P =  < 0.05) results of pairwise comparisons using Tukey multiple comparison test; number of asterisks indicate level of statistical significance